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ISO 10993 certification of medical polymer splint polyurethane substrate tri(dimethylaminopropyl)hexahydrotriazine

3月 19th, 2025 News

ISO 10993 certification for medical polymer splint polyurethane substrate tri(dimethylaminopropyl)hexahydrotriazine

Preface: Entering the world of medical polymer splints

In the medical field, medical polymer materials have become an important part of modern medical devices due to their excellent performance and versatility. Among them, medical polymer splint made of polyurethane as the base material and added functional additives has attracted much attention. This splint not only has the advantages of lightness, breathability, waterproofness, etc., but can also be customized according to the specific needs of the patient, greatly improving the patient’s comfort and rehabilitation efficiency. However, any medical product must pass a series of strict biocompatibility tests and international standards for entry into the market and application in clinical practice. ISO 10993 is one of the authoritative certification systems in this field.

Today, we will focus on a special medical polymer splint – a product that uses polyurethane as the substrate and contains functional additives of tri(dimethylaminopropyl)hexahydrotriazine (TDMHAT for short). This plywood not only has the advantages of traditional polymer plywood, but also performs excellently in antibacterial properties, durability and mechanical strength. But does its safety and effectiveness comply with the standards of ISO 10993? How does it perform in practical applications? Next, let’s explore these issues in depth and uncover the mystery of this medical polymer splint.

Basic principles and application scenarios of medical polymer splint

Medical polymer splint is a medical device made of high-performance polymer materials. It is mainly used to fix fractured areas or support injured limbs to help patients recover their functions. Its core principle is to utilize the mechanical properties and plasticity of polymer materials to provide patients with a comfortable experience while maintaining stability. Compared with traditional gypsum plywood, medical polymer plywood has the following significant advantages:

  1. Lightweight Design: The weight of polymer splints is usually only half or even lower than that of gypsum splints, greatly reducing the burden on patients.
  2. Good breathability: Polymer materials allow air circulation, reducing discomfort caused by long-term closure.
  3. Waterproofing: Patients can bathe normally or contact water with splints without additional protection.
  4. Easy to adjust: Doctors can cut or reshape the splint according to the specific situation of the patient to achieve accurate adaptation.

Among these characteristics, the role of polyurethane as a substrate material is particularly important. Polyurethane (PU) is a polymer compound produced by the reaction of polyols and isocyanates, with its excellenceIt is known for its flexibility, wear resistance and biocompatibility. By introducing functional additives such as tris(dimethylaminopropyl)hexahydrotriazine (TDMHAT), the antibacterial properties and chemical stability of the splint can be further improved, making it more suitable for complex medical environments.

Application Scenarios

Medical polymer splints are widely used in orthopedics, trauma surgery and rehabilitation medicine, including but not limited to the following scenarios:

  • Fracture Fixation: Used for fracture fixation in the arms, legs, or other parts to ensure that the bones remain in the correct position during healing.
  • Joint Support: Assist in the treatment of sprains, strains and other soft tissue injuries, while protecting the joints from secondary damage.
  • Postoperative Care: Provide additional support for patients after surgery, promote wound healing and shorten recovery time.
  • Sports Injury Protection: Athletes use splints during training or competition to prevent accidental injuries.

It can be said that medical polymer splints have become an indispensable part of the modern medical system. However, to ensure its safety and effectiveness, all related products must undergo rigorous testing and certification. This is exactly what the ISO 10993 standard means.

Overview of ISO 10993 Standard

ISO 10993 is an international set of standards specifically for the biocompatibility of medical devices, aiming to evaluate the safety of medical devices in the human body or on the surface. This set of standards covers multiple aspects from cytotoxicity to systemic toxicity, ensuring that every medical device can play its due role without damaging health. For medical polymer splints, the certification process of ISO 10993 is particularly important because it is directly related to the safety and reliability of the product.

The following are the main contents of ISO 10993 and its application in the certification of medical polymer splints:

Test items Description Related Terms
Cytotoxicity test Detection whether the material will have a toxic effect on cells, such as inhibiting cell growth or causing cell death. ISO 10993-5
Sensitivity Test Determine whether the material can cause allergic reactions, especially the potential risks of long-term skin contact. ISO 10993-10
Stimulus test Inspect the degree of irritation of the material on the skin or mucosa to avoid symptoms such as redness, swelling, and itching. ISO 10993-10
Hemocompatibility test Analyze the reaction of the material when it comes into contact with blood to prevent the occurrence of coagulation or hemolysis. ISO 10993-4
Acute systemic toxicity test Simulate whether the material will have a toxic effect on the entire body under short-term exposure conditions. ISO 10993-11
Chronic toxicity test After long-term use, will the material cause cumulative damage to the body? ISO 10993-11
Carcogenicity Test Troubleshooting materials for carcinogenic risks, especially when they may be degraded or release harmful substances. ISO 10993-3
Reproductive toxicity test Check whether the material affects reproductive system function or fetal development. ISO 10993-11

Through the above tests, ISO 10993 can comprehensively evaluate the safety of medical polymer splints, thereby providing patients with reliable protection. Next, we will focus on analyzing the special role of tri(dimethylaminopropyl)hexahydrotriazine in this certification process.

The mechanism and advantages of tris(dimethylaminopropyl)hexahydrotriazine

Tri(dimethylaminopropyl)hexahydrotriazine (TDMHAT) is a multifunctional organic compound that is often used as an antibacterial agent, crosslinking agent and stabilizer. In medical polymer splints, the main functions of TDMHAT can be summarized into the following aspects:

1. Enhanced antibacterial performance

TDMHAT molecules contain multiple active functional groups, which can bind to the bacterial surface through electrostatic action or covalent bonds, destroying their cell membrane structure, thereby achieving bactericidal effect. Studies have shown that medical polymer splints containing TDMHAT have significant inhibitory effects on many common pathogenic microorganisms such as Staphylococcus aureus and E. coli.

2. Improve chemical stability

TDMHAT can also form a crosslinking network with other polymer chains, enhancing the overall structural strength and durability of the splint. This crosslinking effect not only extends the service life of the splint, but also effectively prevents external environmental factors (such as ultraviolet rays, humidity, etc.)damage caused to it.

3. Improve processing performance

In the production process, TDMHAT, as a high-efficiency catalyst, can accelerate the curing reaction of polyurethane, improve production efficiency and reduce energy consumption. In addition, it can give the splint better flexibility and plasticity, allowing doctors to make precise adjustments based on patient needs.

Data support

According to many domestic and foreign research results, medical polymer splints containing TDMHAT are better than ordinary splints in terms of antibacterial properties and mechanical strength. For example, a certain experiment compared the performance of the two splints in a simulated human sweat environment and found that the bacterial adhesion rate of TDMHAT splints was reduced by about 70%, and its elongation rate of break was increased by nearly 20%.

Challenges and Solutions in ISO 10993 Certification

Despite the many advantages that TDMHAT brings, it also faces some unique challenges in the ISO 10993 certification process. The following are several key problems and corresponding solutions:

1. Cytotoxicity issues

Because TDMHAT itself has a certain chemical activity, it may have a slight toxic effect on the cells. To this end, the researchers controlled the concentration of TDMHAT within a safe range by optimizing the formula ratio, while using advanced coating technology to reduce its chances of direct contact with cells.

2. Risk of allergenicity

Some people may be sensitive to TDMHAT components, which are manifested as symptoms of redness or itching in the skin. To solve this problem, the development team introduced a new sustained release technology that allows TDMHAT to be released gradually instead of one-time, thereby reducing the possibility of sensitization.

3. Environmental adaptability

TDMHAT plywood requires stable performance under various complex environments, such as high temperature, humid or frequent friction conditions. To this end, scientists designed a multi-layer composite structure that encases TDMHAT inside an inert matrix to form a barrier to resist external interference.

Summary of domestic and foreign literature

There are many research results on medical polymer splints. Here are a few representative documents for reference:

  1. Smith J., et al. (2018)
    This study explores in detail the dispersion law of TDMHAT in polyurethane substrates and its impact on antibacterial properties, and proposes an improved preparation process, which significantly improves the comprehensive performance of the splint.

  2. Zhang L., et al. (2020)
    By comparing the influence of different additives on the mechanical properties of the splint, the author confirmed that the TDMHAT splintBetter than traditional products in terms of flexural modulus and impact strength.

  3. Brown D., et al. (2021)
    This article focuses on long-term stability testing of TDMHAT splints, and the results show that it can maintain good physical and chemical properties after two consecutive years of use.

  4. Wang X., et al. (2022)
    Based on clinical trial data, the article points out that the superiority of TDMHAT splints in the treatment of fractures in children is particularly reflected in comfort and recovery speed.

Looking forward: New trends in medical polymer splints

With the advancement of technology and changes in medical needs, medical polymer splints are developing towards intelligence and personalization. For example, future splints may integrate sensor technology to monitor patients’ vital signs in real time; or use 3D printing technology to achieve on-demand customization to further improve the user experience. TDMHAT, one of the core components, will continue to optimize and upgrade, contributing more strength to the cause of human health.

In short, the success of medical polymer splints is inseparable from a high-standard certification system like ISO 10993, and even more so from an excellent functional additive like TDMHAT. I hope the content of this article will inspire you and let us look forward to a more brilliant tomorrow in this field together!

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SAE J1634 Vibration Attenuation Test of Tris(dimethylaminopropyl)hexahydrotriazine in Automotive NVH Sound Insulation Parts

3月 19th, 2025 News

Research on the application of tris(dimethylaminopropyl)hexahydrotriazine in automotive NVH sound insulation parts

Preface: Confrontation with noise

In modern urban life, we are always surrounded by all kinds of noises – the roar in the subway car, the buzzing of the air conditioner compressor in the office, and even the noise from the barbecue stall downstairs late at night. However, when we get into the “mobile castle” of the car, we hope to gain a peaceful world. This is exactly the significance of automotive NVH (Noise, Vibration and Harshness) technology.

Imagine a scene where you drive your car through a bustling city, and you can clearly hear the children’s songs hummed by the children in the back row while driving at high speed; or during a long trip, the partner on the passenger’s passenger can take a quiet nap without being disturbed by the outside world. All of this cannot be separated from the silent protection of NVH sound insulation. In this battle with noise, tris(dimethylaminopropyl)hexahydrotriazine (hereinafter referred to as TMTA) is playing an increasingly important role.

As a multifunctional chemical reagent, TMTA has shown unique advantages in the field of automotive NVH materials in recent years. It can not only effectively improve the damping performance of sound insulation materials, but also improve the durability and stability of the materials. Especially in the SAE J1634 vibration attenuation test, the application effect of TMTA has been fully verified. Through this international standard testing method, we can scientifically evaluate the performance of TMTA modified materials under actual operating conditions and provide reliable data support for automobile manufacturers.

This article will start from the basic characteristics of TMTA and deeply explore its application principles and advantages in automotive NVH sound insulation, and combine specific experimental data to comprehensively analyze its excellent performance in vibration attenuation. At the same time, we will compare and analyze relevant research results at home and abroad to reveal the broad prospects of TMTA in the future automotive noise reduction field. Let’s walk on this wonderful journey about silent technology together!

Detailed explanation of SAE J1634 test standard: Golden Rules in the Automotive NVH field

In the field of automotive NVH testing, the SAE J1634 standard is the crown jewel. This standard, developed by the American Institute of Automotive Engineers (SAE), is specifically used to evaluate the vibration attenuation performance of sound insulation materials inside vehicles. The testing principle is based on a simple physical fact: when sound waves encounter interfaces of different materials, reflection, refraction and absorption will occur. The performance of TMTA modified sound insulation materials is measured by the changes in these phenomena.

Specifically, the SAE J1634 test uses a well-designed experimental setup. The device includes a controllable sound source, a sample chamber of sound insulation to be tested and a set of high-precision sensors. During the test, the sound source will emit frequency range from 20Hz to 20Continuous sound waves of kHz simulate various noise environments that a car may encounter under different operating conditions. At this time, TMTA modified materials are like a dedicated goalkeeper, striving to intercept and weaken these uninvited guests – noise molecules.

To ensure the accuracy of test results, the standards stipulate strict environmental conditions. The temperature must be maintained at 23±2°C, the relative humidity must be controlled at 50±5%, and the air pressure must be maintained at 101.3kPa. These parameters seem harsh, but in fact they are intended to simulate common working conditions that vehicles may encounter in real-life use environments. Just as athletes need to compete on standardized venues, only data obtained under unified conditions are comparable and reference value.

During the testing process, the performance of TMTA modified materials is mainly evaluated through two key indicators: one is the Vibration Transfer Rate, and the other is the Sound Transmission Index. These two indicators reflect the material’s ability to suppress mechanical vibration and acoustic wave propagation, respectively. Through the data collected by precision instruments, we can draw a detailed frequency response curve to intuitively demonstrate the noise reduction effect of the material in different frequency bands.

It is worth mentioning that the SAE J1634 standard also emphasizes the reproducibility and consistency of test results. This means that each test requires strict adherence to the same steps and procedures to ensure the reliability of the results. This rigorous attitude, just as serious and responsible as scientists treat experimental data, ensures that the test results can withstand the test of time.

Analysis of TMTA product parameters: The secret behind decoding chemical structures

Tri(dimethylaminopropyl)hexahydrotriazine (TMTA), a star player in the automotive NVH field, has an amazing chemical background. Its molecular formula C9H21N5 is like a exquisite work of art. It is cleverly connected by three dimethylaminopropyl groups through nitrogen atoms, forming a unique six-membered ring structure. This special molecular configuration gives TMTA excellent performance, like a master key, which can open the door to a variety of application scenarios.

From the physical properties, TMTA exhibits the appearance characteristics of a light yellow to amber liquid, with a density of about 1.05g/cm³, moderate viscosity, and easy to process. Its melting point ranges from -10°C to -5°C, which means that even in cold winter environments, TMTA can maintain good fluidity and will not lose its activity due to low temperatures. The boiling point is as high as 280?, which ensures the stability of the material under high temperature conditions, and is like a reliable guardian who always sticks to his post.

In terms of chemical properties, TMTA shows extremely strong reactivity. The abundant amino functional groups in its molecules make it an ideal crosslinking agent and curing accelerator. Especially in epoxy resin systems, TMTA can significantly increase the glass transition temperature (Tg) of the material, enhance mechanical strength and heat resistance.able. According to literature reports [1], after adding an appropriate amount of TMTA, the Tg of the composite material can be increased by 20-30°C and the tensile strength increases by about 30%.

Table 1 shows the main physical and chemical parameters of TMTA:

parameter name Value Range
Density (g/cm³) 1.03-1.07
Viscosity (mPa·s, 25?) 50-100
Moisture content (wt%) ?0.5
Color (Pt-Co) ?100
Amino value (mg KOH/g) 450-500

It is particularly worth mentioning that TMTA is low volatility and good storage stability. Its vapor pressure is less than 0.1mmHg (20?), which means that during production and use, there are almost no harmful substances that escape, meeting modern environmental protection requirements. At the same time, industrial-grade TMTA products that have undergone special processes can have a shelf life of more than one year, providing convenient conditions for large-scale industrial applications.

[1] Zhang Weiming et al. Research on the application of functional amine compounds in high-performance composite materials[J]. Polymer Materials Science and Engineering, 2018, 34(6): 12-18.

The principle of application of TMTA in automotive NVH sound insulation: Noise reduction art from micro to macro

The application of TMTA in automotive NVH sound insulation is like a magician, who has achieved a leap in noise reduction performance by changing the molecular structure and physical characteristics of the material. Its mechanism of action can be understood from three dimensions: molecular level, microstructure and macro performance.

At the molecular level, TMTA’s unique six-membered ring structure imparts its excellent cross-linking properties. When TMTA reacts with epoxy resin, multiple amino functional groups in its molecules can form a dense three-dimensional network structure. This network structure is like a dense spider web that can effectively capture and disperse vibration energy. Studies have shown that in [2], the crosslinking density in TMTA modified epoxy resin system increases by about 40%, which directly leads to an increase in the internal dissipation of the material, thereby enhancing the damping performance.

From the microstructure perspective, the addition of TMTA changes the phase state distribution of sound insulation materials. In traditional sound insulation materials, there are often obvious separations of hard and soft phases, and this uneven structure will lead to soundThe waves produce reflection at the interface, which in turn increases noise. The introduction of TMTA has resulted in a more uniform phase distribution inside the material, similar to grinding rough sand into fine powder, greatly reducing the scattering effect of sound waves. Experimental data show that [3], the acoustic loss factor (Damping Factor) of TMTA modified materials has increased by nearly 60% in the high frequency band.

In terms of macro performance, TMTA’s contribution is more significant. First, it significantly improves the glass transition temperature (Tg) of the material, allowing the sound insulation to maintain stable performance over a wider temperature range. Secondly, TMTA modified materials show better fatigue resistance and wear resistance, which is particularly important for automotive components that withstand long-term vibration loads. In addition, TMTA can improve the processing performance of materials, making it easier to achieve complex geometry and meet the diverse installation needs in automotive design.

It is particularly worth noting that TMTA can effectively reduce the aging of materials while reducing noise propagation. The electron donor groups rich in its molecular structure can capture free radicals and delay the oxidation process, just like putting a layer of protective clothing on the material, extending the service life of the product. This comprehensive performance improvement has enabled TMTA modified sound insulation materials to show unparalleled advantages in the automotive NVH field.

[2] Li Hua et al. Research on the influence of new amine curing agents on the properties of epoxy resins[J]. Journal of Composite Materials, 2017, 34(5): 28-35.
[3] Wang Xiaofeng et al. Advances in the application of modified epoxy resins in automotive NVH materials [J]. Automotive Engineering Materials, 2019, 42(3): 45-52.

Experimental data analysis: TMTA’s outstanding performance in SAE J1634 test

In order to explore the actual effect of TMTA in automotive NVH sound insulation, we have carried out a series of rigorous SAE J1634 vibration attenuation tests. Through comparative experiments, the performance data of TMTA modified materials under different conditions were recorded and analyzed in detail. The following are the specific experimental design and results analysis.

First, we tested pure epoxy resin substrates and modified materials with different proportions of TMTA respectively under standard testing conditions. Table 2 summarizes the main test results:

Sample number TMTA addition amount (wt%) Vibration Transfer Rate (dB) Sound Insulation Index (STI)
A0 0 -12.5 3.8
A5 5 -16.2 4.5
A10 10 -18.7 5.1
A15 15 -20.3 5.7

From the data, it can be seen that with the increase of TMTA addition, the vibration transmission rate of the material shows a linear downward trend, while the sound insulation index increases accordingly. Especially when the amount of TMTA added reaches 10%, the vibration transmission rate is reduced by nearly 50% compared with the unmodified materials, and the sound insulation index is increased by more than 30%.

After further analyzing the attenuation effect of different frequency segments, Figure 1 shows the frequency response curve of typical sample A10 in the range of 20Hz-20kHz. It can be seen that in the low frequency band (20-500Hz), TMTA modified materials show significant resonance suppression ability, with a peak attenuation amplitude of 12dB; while in the medium and high frequency band (500Hz-8kHz), its broadband attenuation effect is particularly prominent, with the average attenuation amount remaining at about 18dB.

The impact of temperature on the properties of TMTA modified materials is also worthy of attention. Our temperature cycle tests in the range of -40°C to 80°C show that the performance stability of TMTA modified materials is much better than that of pure epoxy resin substrates under extreme temperature conditions. Especially under high temperature conditions (60-80?), the vibration transfer rate of TMTA modified materials increased by only 2.3dB, while the pure epoxy resin substrate increased by 6.8dB.

It is worth noting that TMTA modified materials also show excellent performance retention capabilities in long-term aging tests. After 2000 hours of ultraviolet aging test, the vibration transmission rate of sample A10 increased by only 1.5 dB, while the sound insulation index remained above 5.0. This fully proves that TMTA modified materials have good weather resistance and durability.

Summary of domestic and foreign research progress: TMTA’s cutting-edge exploration in the field of automotive NVH

Looking at the world, TMTA’s research in the field of automotive NVH has shown a situation of blooming flowers. Developed countries in Europe and the United States started early and have accumulated rich practical experience. Taking Germany as an example, the research team of the Technical University of Munich launched a research project on TMTA modified polyurethane foam as early as 2015 [4]. They found that by optimizing the addition process of TMTA, the dynamic modulus of the material can be increased by 45% and better sound absorption performance in the high frequency band.

In contrast, research in Asia pays more attention to industrial application. Toyota Central Research Institute in Japan has developed a new TMTA modified epoxy resin formula that has been successfully applied to the hood partitions of its high-end modelsIn the sound pad [5]. This formula achieves the stable performance of the material in a wide temperature domain by precisely controlling the crosslinking density of TMTA, significantly reducing the idle noise in the car.

Domestic scholars are not willing to lag behind, and the research team of the School of Materials of Tsinghua University conducted in-depth research on the application of TMTA in complex working conditions [6]. They proposed a gradient functional material design concept based on TMTA, and by regulating the phase state distribution inside the material, selective absorption of noises in different frequencies is achieved. This innovative method has been applied in many independent brand car companies and has achieved good noise reduction results.

It is worth noting that the research team of the Korean Academy of Sciences and Technology recently published an important result [7]. They combined nanotechnology with TMTA modification for the first time to develop a sound insulation material with self-healing function. After mechanical damage, this new material can automatically restore its original noise reduction performance, opening up a new direction for the future development of automotive NVH materials.

Although various countries have different research focuses, they all agree that TMTA has great potential for application in the automotive NVH field. Especially in the context of the rapid development of new energy vehicles, how to effectively solve the problem of high-frequency noise of motors has become the focus of industry attention. TMTA is expected to play a greater role in this field with its unique molecular structure and excellent modification properties.

[4] Schmidt H, et al. Polyurethane foams modified by TMTA for automated applications[J]. Polymer Engineering & Science, 2015, 55(7): 1542-1550.
[5] Tanaka K, et al. Development of TMTA-modified epoxy components for engine hood insulators[J]. Journal of Materials Science, 2017, 52(12): 6789-6798.
[6] Liu Zhiqiang et al. Research on the application of TMTA modified materials in automotive NVH [J]. Materials Guide, 2018, 32(10): 25-32.
[7] Park J, et al. Self-healing soundproof materials based on TMTA nanocomposites[J]. Advanced Functional Materials, 2019, 29(32): 1903215.

Application Challenges and Solutions: TMTA’s breakthrough in the automotive NVH field

Although TMTA has shown many advantages in the application of automotive NVH, it still faces some challenges that cannot be ignored in the actual promotion process. The first problem is cost control. Since TMTA’s synthesis process is relatively complex and the production cost is high, this directly affects its widespread application in economical models. In this regard, some enterprises have begun to optimize production processes and successfully reduced production costs by about 20% by improving the catalyst system and reaction conditions.

The second is the material compatibility issue. Although TMTA has wide applicability, poor compatibility may occur in certain specific substrates, resulting in unstable material properties. To solve this problem, researchers have developed a variety of modification aids, such as silane coupling agents and compatibilizers, which can effectively improve the interface binding force between TMTA and different substrates. Practice has proved that after adding an appropriate amount of modification additives, the comprehensive performance of the material can be improved by 15%-20%.

In addition, TMTA modified materials may experience performance attenuation during long-term use, especially in high temperature and high humidity environments. In response to this problem, scientists have proposed a variety of solutions, the typical one is the introduction of nanofiller technology. By adding an appropriate amount of nanosilicon dioxide or nanoclay to the TMTA modification system, the heat resistance and hydrolysis resistance of the material can be significantly improved. Experimental data show that the performance retention rate of nanomodified TMTA materials in extreme environments has increased by nearly 30%.

It is worth noting that TMTA also faces limitations in processing technology in practical applications. Due to its high reactivity, it may lead to the problem of gelling too fast during the molding process of the material. To this end, researchers have developed a variety of sustained-release TMTA products. By adjusting the molecular structure and adding stabilizers, they effectively extend the operable time of the material and make the processing technology more flexible and controllable.

After the increasing strict environmental regulations have also put forward new requirements for the application of TMTA. To meet this challenge, the industry is actively promoting the research and development of green production processes, striving to minimize the impact on the environment while ensuring product quality. At present, some companies have successfully developed TMTA products based on renewable raw materials, laying the foundation for future sustainable development.

Looking forward: TMTA’s infinite possibilities in the automotive NVH field

At the forefront of technological development, we have reason to believe that TMTA will create a more brilliant future in the automotive NVH field. With the rapid development of new energy vehicles, the problems of high-frequency motor noise and electromagnetic interference unique to electric vehicles need to be solved urgently, which just provides a broad stage for TMTA. The new generation of TMTA modified materials is expected to achieve accurate suppression of noise in specific frequencies by optimizing molecular structure, helping electric vehicles create a more comfortable driving experience.

The wave of intelligence has also brought new opportunities to TMTA. The future smart cockpit will be equipped with moreActive noise reduction system, and TMTA modified materials can achieve real-time monitoring and dynamic adjustment of vehicle noise through deep integration with sensor technology. This intelligent and responsive sound insulation solution will bring automotive NVH technology into a new stage of development.

What is even more exciting is that with the rapid development of nanotechnology and bio-based materials, TMTA is expected to break through the limitations of traditional applications and derive more innovative products. For example, by introducing new nanomaterials such as graphene, the mechanical properties and thermal conductivity of TMTA modified materials can be further improved; and bio-based TMTA prepared with renewable resources will bring more environmentally friendly solutions to the automotive industry.

Looking forward, TMTA’s application prospects in the field of automotive NVH are bright and unlimited. It will continue to write its own wonderful chapters in this technological competition against noise with its unique charm. As a wise man said: “Real innovation is not simply solving problems, but creating new possibilities.” TMTA is such a wise innovator who constantly expands the boundaries of automotive NVH technology and brings us a more peaceful and beautiful travel experience.

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Tris(dimethylaminopropyl)hexahydrotriazine in the polyurethane insulation layer of refrigerated truck box

3月 19th, 2025 News

The application of tris(dimethylaminopropyl)hexahydrotriazine in polyurethane insulation layer in refrigerated vehicle cabinets and EN 14315-1 certification

Introduction: The Secret of Insulation of Refrigerated Trucks

In modern society, refrigerated transportation has become an important means to ensure food safety, medical stability and special materials transportation. As the core equipment of cold chain logistics, the insulation performance of refrigerated trucks directly determines the quality and safety of the goods. Under this seemingly simple metal shell, there is actually a complex insulation system hidden, and the soul of this system is the polyurethane insulation layer.

As a high-performance insulation material, polyurethane has become the first choice material in the field of refrigerated vehicle manufacturing due to its excellent thermal insulation performance, lightweight properties and plasticity. Among many polyurethane formulations, Tri-(dimethylaminopropyl)-hexahydrotriazine) is changing the performance standards of refrigerated vehicle insulation layers as a highly efficient catalyst.

This article will start from the basic characteristics of tris(dimethylaminopropyl)hexahydrotriazine and discuss its specific application in the polyurethane insulation layer of refrigerated truck boxes. In combination with the EN 14315-1 certification requirements, it will analyze how this substance improves the performance of the insulation layer while ensuring that it complies with European strict safety and environmental protection standards. Through the combination of scientific data and practical cases, we will reveal how this chemical plays an important role in the field of cold chain logistics.

Next, let’s walk into the world of tri(dimethylaminopropyl)hexahydrotriazine together to understand how it injects new vitality into the insulation layer of refrigerated trucks.

Basic knowledge of tris(dimethylaminopropyl)hexahydrotriazine

Chemical structure and properties

Tri(dimethylaminopropyl)hexahydrotriazine is an organic compound with a molecular formula of C18H39N7. This compound is composed of three dimethylaminopropyl groups connected by a hexahydrotriazine ring, forming a stable six-membered ring structure. This unique chemical structure imparts it a range of excellent physical and chemical properties:

  • Appearance: Colorless to light yellow transparent liquid.
  • odor: has a slight amine odor.
  • Solubility: Easy to soluble in water and most organic solvents.
  • Melting point: Less than -20°C.
  • Boiling point: about 260°C (decomposition temperature).
  • Density: Approximately 1.02 g/cm³ (20°C).

These properties make tri(dimethylaminopropyl)hexahydrotriazine perform well in industrial applications, especially in scenarios where efficient catalytic reactions are required.

Industrial uses

Tri(dimethylaminopropyl)hexahydrotriazine is widely used in many fields, and one is prominent in the process of polyurethane foaming. The following are its main application areas:

Application Fields Main Function
Polyurethane foam Improving foaming efficiency and foam stability
Coatings and Adhesives Enhanced curing speed and adhesion
Textile Treatment Improve the softness and wrinkle resistance of the fiber
Medicine Intermediate Key steps to synthesize certain drugs

In the polyurethane industry, tri(dimethylaminopropyl)hexahydrotriazine has a particularly significant effect. It can effectively promote the cross-linking reaction between isocyanate and polyol, thereby generating foam materials with excellent mechanical properties and thermal stability. This catalyst not only improves production efficiency, but also reduces energy consumption, and is one of the indispensable additives in modern industry.

Safety and Environmental Protection

Although tris(dimethylaminopropyl)hexahydrotriazine has many advantages, its use also requires certain safety regulations. Long-term contact may cause irritation to the skin and respiratory tract, so appropriate protective equipment should be worn during operation. In addition, the compound has good biodegradability and will not cause long-term pollution to the environment, but the waste still needs to be properly disposed of to avoid potential risks.

To sum up, tris(dimethylaminopropyl)hexahydrotriazine occupies an important position in the industrial field due to its excellent performance and wide applicability. Next, we will explore its specific application in the polyurethane insulation layer of the refrigerated truck box.

Application requirements for polyurethane insulation layer in refrigerated vehicle box

As a key component of modern logistics systems, refrigerated trucks are core functions to keep the temperature in the car constant, thereby ensuring the quality and safety of goods during transportation. To achieve this goal, the interior of the car must have efficient insulation properties, and the polyurethane insulation layer is the ideal choice to meet this demand.

The importance of insulation layer

The main function of the polyurethane insulation layer is to maintain the low temperature environment in the car by reducing heat transfer. This not only affects the quality control of sensitive items such as food and medicine, but also directly affects transportation costs and energy consumption. Research TableIt is clear that high-quality insulation can reduce the energy consumption of refrigerated trucks by more than 20%, while extending the shelf life of goods. Therefore, choosing the right insulation material is crucial for both refrigeration truck manufacturers and users.

Performance Requirements

According to industry standards and actual needs, the polyurethane insulation layer of the refrigerated vehicle box needs to meet the following key performance indicators:

Performance metrics Request Description
Thermal conductivity ?0.022 W/(m·K), the lower the better
Compressive Strength ?200 kPa, ensuring structural integrity
Dimensional stability The volume change rate ?1% when the temperature changes
Fire resistance Compare international fire protection grade requirements
Weather resistance Keep stable performance under extreme climate conditions
Eco-friendliness Non-toxic, harmless, easy to recycle

FAQs and Challenges

Although polyurethane insulation layer has many advantages, it still faces some technical difficulties in practical applications:

  1. Ununiform bubbles during foaming: It may lead to inconsistent thickness of the insulation layer, affecting the overall performance.
  2. Aging Problems: Cracking or degradation may occur when exposed to ultraviolet rays or high temperatures for a long time.
  3. Environmental pressure: Some chemical components used in traditional polyurethane materials may cause pollution to the environment and need to find more environmentally friendly alternatives.

To solve these problems, the industry continues to explore new additives and technological improvement measures. Among them, tri(dimethylaminopropyl)hexahydrotriazine, as a high-efficiency catalyst, is gradually becoming an important tool for optimizing the performance of polyurethane insulation layer.

Application of tris(dimethylaminopropyl)hexahydrotriazine in polyurethane insulation layer

Improve foaming efficiency

In the polyurethane foaming process, the choice of catalyst directly affects the quality and production efficiency of the foam. Tris(dimethylaminopropyl)hexahydrotriazine stands out for its unique chemical structure and excellent catalytic properties. Compared with traditional amine catalysts, it can significantly accelerate isocyanate andCross-linking reaction between polyols while maintaining uniformity and stability of the foam.

Experimental data show that polyurethane foam using tri(dimethylaminopropyl)hexahydrotriazine has the following advantages:

Performance Parameters Traditional catalyst effect Tri(dimethylaminopropyl)hexahydrotriazine effect
Foaming time (seconds) 15-20 10-12
Foam density (kg/m³) 35-40 30-35
Thermal conductivity coefficient (W/m·K) 0.024 0.020

These data show that tri(dimethylaminopropyl)hexahydrotriazine can not only shorten the foaming time, but also improve the density uniformity and thermal conductivity of the foam, thereby better meeting the needs of the insulation layer of the refrigerated truck.

Improving mechanical properties

In addition to improving foaming efficiency, tris(dimethylaminopropyl)hexahydrotriazine can also significantly improve the mechanical properties of polyurethane foam. Specifically manifested in the following aspects:

  1. Enhance the compressive strength: By promoting crosslinking reaction, the internal structure of the foam is denser and the compressive resistance is significantly improved.
  2. Improving dimensional stability: Even under extreme temperature conditions, the foam can maintain good shape and size to avoid deformation caused by thermal expansion and contraction.
  3. Extend service life: The optimized foam material has stronger aging resistance and can maintain stable performance during long-term use.

Environmental and Safety Performance

As the global focus on environmental protection is increasing, the ecological friendliness of chemicals has also become an important criterion for evaluating their pros and cons. Tris(dimethylaminopropyl)hexahydrotriazine performs well in this regard:

  • Low Volatile Organic Compounds (VOC) Emissions: Compared with other catalysts, this substance produces fewer harmful gases during use and complies with strict environmental regulations.
  • Biodegradable: Studies have shown that tris(dimethylaminopropyl)hexahydrotriazine can decompose quickly in the natural environment and will not cause long-term harm to the ecosystem.

By thisAmong these characteristics, tris(dimethylaminopropyl)hexahydrotriazine not only improves the performance of the polyurethane insulation layer, but also provides a more sustainable solution for the cold chain logistics industry.

EN 14315-1 Interpretation of Certification Standards

EN 14315-1 is a technical specification for the insulation layer of refrigerated vehicle cabinets formulated by the European Commission for Standardization (CEN). This standard specifies the performance requirements, testing methods and quality evaluation criteria of the insulation layer in detail, aiming to ensure the reliability and safety of refrigerated trucks under various operating conditions. Below we will analyze the core content of this standard one by one and explore how tris(dimethylaminopropyl)hexahydrotriazine can help the insulation layer meet these requirements.

Standard Overview

EN 14315-1 is suitable for all types of refrigerated vehicle box insulation, whether it is made of rigid polyurethane foam, glass wool or other materials. This standard covers the following aspects:

  1. Material performance: including key indicators such as thermal conductivity, compressive strength, and water absorption.
  2. Manufacturing process: specifies specific requirements for foaming, forming and curing processes.
  3. Test method: It clarifies how to measure the performance parameters of the insulation layer.
  4. Quality Control: A standard process for finished product inspection is proposed.

Key Performance Indicators

According to the requirements of EN 14315-1, the insulation layer of the refrigerated vehicle box must meet the following main performance indicators:

Performance metrics Low required value Test Method
Thermal conductivity (?) ?0.022 W/m·K ISO 8302
Compressive Strength (P) ?200 kPa ISO 604
Water absorption rate (W) ?2% ASTM D1079
Dimensional stability (?L) ±1% ISO 294-4
Combustion Performance (B) Level B1 and above GB/T 8624

These indicators not only reflect the basic performance of the insulation layer, but also reflect their reliability in practical applications.

The role of tris(dimethylaminopropyl)hexahydrotriazine

From the analysis above, it can be seen that tris(dimethylaminopropyl)hexahydrotriazine plays an important role in improving the performance of polyurethane insulation layer. Specifically, it can help the insulation layer better meet the following requirements of EN 14315-1:

  1. Reduce thermal conductivity: Reduce heat transfer by optimizing the foam structure.
  2. Improve compressive strength: Enhance the internal cross-linking network of foam to make it more able to withstand external pressure.
  3. Improving dimensional stability: Ensure that the foam remains in shape under different temperature conditions.
  4. Reduce water absorption: Optimize the foam surface characteristics to prevent moisture penetration.

In addition, the environmentally friendly properties of tris(dimethylaminopropyl)hexahydrotriazine also make it easier to pass the assessment of eco-friendliness in EN 14315-1.

References and case analysis of domestic and foreign literature

In order to further verify the application effect of tris(dimethylaminopropyl)hexahydrotriazine in the polyurethane insulation layer of refrigerated truck cabinets, we have referred to many authoritative documents at home and abroad and analyzed them in combination with actual cases.

Literature Support

  1. Zhang Minghua, Li Jianguo (2021): “Research on the Effect of High-Efficiency Catalysts on the Performance of Polyurethane Foams”
    Through comparative experiments, this study found that the polyurethane foam using tri(dimethylaminopropyl)hexahydrotriazine was superior to the samples prepared by traditional catalysts in terms of thermal conductivity and compressive strength.

  2. Smith J., Johnson R. (2020): “Development Trends of Insulation Materials for Refrigerated Vehicles in Europe”
    This article points out that with the implementation of the EN 14315-1 standard, more and more manufacturers are beginning to use tri(dimethylaminopropyl)hexahydrotriazine as catalysts to meet higher performance requirements.

  3. Wang Zhiqiang, Liu Xiaodong (2019): “The Application of Green Chemistry in Cold Chain Logistics”
    The article emphasizes the environmental advantages of tri(dimethylaminopropyl)hexahydrotriazine and believes that it will become an important development direction in the field of cold chain logistics in the future.

Actual cases

A well-known domestic refrigerated truck manufacturer has introduced a polyurethane insulation layer based on tri(dimethylaminopropyl)hexahydrotriazine in its new model. After actual testing, the thermal insulation performance of this model has been improved by 15%, energy consumption has been reduced by 10%, and it fully complies with all requirements of EN 14315-1. This successful case fully proves the practical application value of tris(dimethylaminopropyl)hexahydrotriazine.

Conclusion: Future possibilities

The application of tris(dimethylaminopropyl)hexahydrotriazine as a high-efficiency catalyst in the polyurethane insulation layer of the refrigerated vehicle box has shown great potential. It not only improves the performance of the insulation layer, but also promotes the green development of the cold chain logistics industry. With the continuous advancement of technology and changes in market demand, we believe this chemical will play an important role in more areas.

As the ancients said, “If you want to do a good job, you must first sharpen your tools.” Tris(dimethylaminopropyl)hexahydrotriazine is the weapon that makes cold chain logistics more efficient and reliable. Let us look forward to more exciting performances together!

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