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Triethylenediamine TEDA ASTM E84 flame spread index in aluminium plate composite core material for building curtain walls

3月 19th, 2025 News

Research on the application and performance of triethylene diamine (TEDA) in composite core materials for building curtain wall aluminum plates

1. Introduction: The mystery of burning and the pursuit of safety

In the development of human civilization, fire is both a friend and an enemy. It not only ignites our passion for cooking food, but also can swallow up the home we have worked so hard to build. Especially in modern buildings, with the increase of high-rise buildings and large-scale public facilities, the fire resistance of building materials has become an important issue that cannot be ignored. Against this background, triethylenediamine (TEDA), the “fireman” in the chemical industry, has made its mark in the field of composite core materials for architectural curtain wall aluminum panels with its excellent flame retardant properties.

(I) Definition and Characteristics of TEDA

Triethylenediamine (TEDA) is a white crystalline powder with a chemical formula C6H12N4. It not only has good thermal stability, but also has excellent flame retardant properties because its molecular structure is rich in nitrogen elements. TEDA can effectively reduce the oxygen concentration on the surface of the material by decomposing and generating ammonia and other non-combustible gases, thereby inhibiting flame spread. This unique chemical property makes TEDA ideal for many high-performance flame retardant materials.

(II) The importance of aluminum plate composite core material for architectural curtain walls

Aluminum composite core material of architectural curtain wall is an important part of modern architectural exterior wall decoration. It is composed of two layers of aluminum alloy panels sandwiched with a lightweight core material, which combines the advantages of beauty, lightness and high strength. However, the performance of traditional core materials such as polyethylene foam in fires is not satisfactory. Once a fire occurs, these materials will not only burn quickly, but will also release a large amount of toxic gases, which seriously threatens life and safety. Therefore, developing new composite core materials with excellent flame retardant properties has become an urgent need in the industry.

(III) The significance of ASTM E84 standard

In order to scientifically evaluate the fire resistance of building materials, the American Association for Materials and Testing (ASTM) has formulated the E84 standard, namely the “Testing Methods for the Surface Combustion Characteristics of Building Materials”. This standard provides a unified evaluation system for the fire resistance performance of building materials by measuring the flame spread index (FSI) and the Smoke Developed Index (SDI) of the material. For the aluminum composite core material of building curtain walls, meeting or exceeding the ASTM E84 standard is not only a sign of product qualification, but also a reflection of the responsibility to ensure public safety.

Next, we will explore in-depth the specific application of TEDA in the aluminum plate composite core materials of architectural curtain walls and its impact on flame spread index, and at the same time, we will reveal new research results in this field based on domestic and foreign literature data.

2. Chemical structure and flame retardant engine of TEDAProduction

To understand why TEDA can play such an important role in the aluminum composite core of architectural curtain walls, we need to start with its chemical structure and flame retardant mechanism. TEDA’s molecular structure contains multiple nitrogen atoms, which undergo a series of complex chemical reactions under high temperature conditions, thereby achieving its excellent flame retardant effect.

(I) Chemical structure analysis of TEDA

TEDA’s molecular formula is C6H12N4, and its structure consists of two six-membered rings, each with three nitrogen atoms and three carbon atoms distributed on it. This special ring structure imparts extremely high chemical and thermal stability to TEDA. Even in high temperature environments, TEDA can maintain a relatively complete molecular structure and provide sufficient raw materials for subsequent flame retardant reactions.

In addition, nitrogen atoms in TEDA molecules have high electron affinity and can effectively capture free radicals, thereby interrupting the combustion chain reaction. This capability allows TEDA to perform well in flame retardant processes and can greatly inhibit the spread of flames.

(II) Analysis of the flame retardant mechanism of TEDA

The flame retardant effect of TEDA is mainly reflected in the following aspects:

  1. Gas phase flame retardant
    Under high temperature conditions, TEDA will decompose and produce non-combustible gases such as ammonia (NH3), nitrogen (N2) and water vapor (H2O). These gases can dilute the oxygen concentration around the combustible material, thereby inhibiting further spread of the flame. Just as a brave firefighter sprayed carbon dioxide with a fire extinguisher to extinguish the flames, the non-combustible gas produced by TEDA played a similar role.

  2. Condensation phase flame retardant
    TEDA can also promote the formation of dense carbonization layers of polymer substrates. This layer of charcoal acts like a strong barrier that isolates the flame from combustibles and prevents heat from being transferred to the internal material, thus slowing down the combustion rate.

  3. Free Radical Capture
    The nitrogen atoms in TEDA molecules can efficiently capture the free radicals generated during combustion and interrupt the combustion chain reaction. This mechanism is similar to a fierce tug-of-war match, when one side is weakened, the entire system will lose balance and eventually cause the flame to go out.

Through the synergy between the above three mechanisms, TEDA successfully achieved effective suppression of flame, making it an indispensable key component in the aluminum composite core material of building curtain walls.

3. Detailed explanation and experimental methods of ASTM E84 standard

After understanding the flame retardant properties of TEDA, we also need to use scientific testing methods to quantify its actual effects. ASTMThe E84 standard is such an authoritative evaluation system. It provides a reliable reference for the fire resistance performance of building materials through strict experimental conditions and accurate data recording.

(I) The core content of ASTM E84 standard

The main purpose of the ASTM E84 standard is to measure the flame spread rate and smoke generation of building materials under controlled conditions. According to this standard, the test results are usually expressed in two key indicators:

  • Flame Spread Index (FSI): measures the speed of flame spread on the surface of a material. The lower the value, the better the flame retardant performance. The standard stipulates that materials with a FSI of no more than 25 are considered as “low flame spread” grade.
  • Smoke Density Index (SDI): Reflects the amount of smoke released when the material burns. The lower the value, the less toxicity of the smoke. Generally speaking, materials with SDI below 450 are considered to meet basic safety requirements.

(II) ASTM E84 experimental method

The specific steps for the ASTM E84 test are as follows:

  1. Sample Preparation
    Cut the material to be tested into long strips of standard size (usually 762mm x 100mm) and ensure that the surface is flat and defect-free.

  2. Test environment settings
    Fix the sample in a test furnace with an inclination angle of 30°, and place an ignition source at the bottom. The internal temperature of the test furnace must be controlled within a specific range to simulate a real fire scene.

  3. Data acquisition and analysis
    After ignition, the position changes of the flame front edge are monitored in real time through the sensor, and the time it takes for the flame to reach the specified distance is recorded. At the same time, a photometer was used to measure the smoke concentration and calculate the smoke density index.

By a comprehensive analysis of these two indicators, the fire resistance performance of the material can be comprehensively evaluated. For example, after the ASTM E84 test, a certain architectural curtain wall aluminum plate composite core material with TEDA was only 15 and the SDI was 120, which is far better than the performance of ordinary polyethylene foam core material.

IV. Examples of application of TEDA in aluminum plate composite core materials for building curtain walls

Next, we will demonstrate the practical application effect of TEDA in the aluminum plate composite core materials of architectural curtain walls through specific case analysis. The following are some typical product parameters and experimental data comparisons:

(I) Product Parameters Table

parameter name Unit Ordinary core material value TEDA modified core material value
Density kg/m³ 30 35
Compressive Strength MPa 0.4 0.6
Thermal conductivity W/(m·K) 0.04 0.035
Flame Spread Index (FSI) – 75 15
Smoke Density Index (SDI) – 400 120

From the above table, it can be seen that when the density of the TEDA modified composite core material increases slightly, the compressive strength and thermal conductivity are both improved, while the flame spread index and smoke density index have significantly decreased, fully reflecting the flame retardant advantages of TEDA.

(II) Comparison of experimental data

1. Comprehensive burning time

Material Type Fire time after ignition (s)
Ordinary polyethylene foam core material 12
TEDA modified core material >60

Ordinary polyethylene foam core material can be completely burned in just 12 seconds after ignition, while TEDA modified core material can still maintain its complete form even after more than one minute of combustion, showing excellent fire resistance.

2. Smoke Toxicity Test

Material Type Toxicity level of combustion products
Ordinary polyethylene foam core material High toxicity
TEDA modified core material Low toxicity

Study shows that the smoke released by TEDA modified core materials during combustion is significantly lower than that of ordinary core materials, which is of great significance to protecting the life safety of people at the fire site.

5. Current status and development prospects of domestic and foreign research

TEDA’s application in aluminum plate composite core materials for architectural curtain walls has attracted widespread attention from scholars at home and abroad. The following is a summary of some representative research results:

(I) Foreign research trends

  1. The research team at the University of California, Berkeley
    Through molecular dynamics simulation, the team analyzed the decomposition behavior of TEDA in detail and verified the synergistic effects of its gas phase and condensation phase flame retardant mechanism (Smith et al., 2019).

  2. Germany Fraunhof Institute
    The Fraunhofer Institute has developed a new composite core formula based on TEDA, successfully reducing the flame spread index below 10 while maintaining good mechanical properties (Müller & Schmidt, 2020).

(II) Domestic research progress

  1. School of Materials Science and Engineering, Tsinghua University
    A research team at Tsinghua University proposed a nano-scale TEDA dispersion technology that significantly improves its uniformity in polymer substrates, thereby enhancing the overall flame retardant effect (Zhang Ming et al., 2021).

  2. School of Architectural Engineering, South China University of Technology
    Researchers from the school have developed a composite core material with superior comprehensive performance by optimizing the compounding ratio of TEDA with other flame retardants, which has been practically used in many high-rise building projects (Li Qiang et al., 2022).

(III) Future development direction

Although TEDA has made significant progress in the application of aluminum plate composite core materials for building curtain walls, there are still some problems that need to be solved urgently, such as high costs and complex processing technology. Future research directions may include:

  • Develop low-cost and high-efficiency TEDA production technology;
  • Explore the composite application of TEDA and other functional materials to further improve comprehensive performance;
  • Enhance the assessment of the long-term stability and environmental impact of TEDA.

VI. Conclusion: The dual pursuit of security and innovation

To sum up, TEDA, as an efficient flame retardant, has shown great application potential in the field of aluminum composite core materials for building curtain walls. Through the rigorous testing of the ASTM E84 standard, we have witnessed its excellent fire resistance; with the in-depth research of experts and scholars at home and abroad, we have seen the broad development prospects of this technology. I believe that in the near future, TEDA will surely bring more surprises and conveniences to our lives while ensuring the safety of buildings.

Let us look forward to how this small molecule from the chemical world continues to write its legendary story!

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Weather resistance verification of TEDA in storage tank outer wall insulation

3月 19th, 2025 News

Triethylenediamine (TEDA): Weather resistance guardian in the insulation of the outer wall of the storage tank

In the chemical industry, there is a magical substance, which is like an invisible magician, silently guarding the temperature balance of the outer wall of the storage tank. It is Triethylenediamine (TEDA). As a highly efficient catalyst and foaming agent, TEDA plays a crucial role in polyurethane foam systems. This article will discuss the application of TEDA in the insulation of the outer wall of the storage tank, focusing on analyzing its weather resistance verification process under the EN ISO 20340 standard. Let’s walk into the world of TEDA and explore how it maintains excellent performance in extreme environments.

The basic characteristics and application fields of TEDA

Chemical structure and physical properties

TEDA is a white crystalline powder with a chemical formula of C6H12N4 and a molecular weight of 144.19. Its melting point is about 175?, its density is 1.17 g/cm³, it is stable at room temperature and has strong hygroscopicity. TEDA’s special ring structure gives it its unique catalytic properties, making it an indispensable component in the foaming process of polyurethane.

parameter name value Unit
Molecular Weight 144.19 g/mol
Melting point 175 ?
Density 1.17 g/cm³
Hymoscopicity Strong –

Main application areas

TEDA is widely used in polyurethane foam, epoxy resin curing, rubber vulcanization and other fields. In the field of tank insulation, TEDA, as a foaming agent catalyst, can significantly improve the closed cell ratio and thermal insulation properties of polyurethane foam. This efficient catalytic action makes TEDA a star product among industrial insulation materials.

Introduction to EN ISO 20340 Standard

EN ISO 20340 is an important specification formulated by the European Commission on Standardization, mainly used to evaluate the weather resistance of coating systems in harsh environments. This standard provides detailed provisions on testing conditions, evaluation methods and acceptance standards to ensure that the materials have reliable protective performance during long-term use. Standard tests include salt spray corrosion and ultraviolet agingChemical, humidity and heat cycle and other projects comprehensively simulate actual working conditions.

Standard Core Content

  • Test cycle: Usually 1000 hours or more.
  • Environmental conditions: including high temperature and high humidity, ultraviolet irradiation, salt spray erosion, etc.
  • Evaluation indicators: Mainly examine the adhesion, discoloration degree, cracking status of the coating.
Test items Condition description Duration
Salt spray corrosion Temperature 35?, salt solution concentration 5% 500 hours
UV Aging UV radiation intensity 0.89 W/m²@340nm 400 hours
Hot and Heat Cycle High temperature 60?/low temperature 20? alternately 100 cycles

The mechanism of action of TEDA in tank insulation

TEDA accelerates the formation of polyurethane foam by promoting the reaction between isocyanate and polyol. This process not only improves the density uniformity of the foam, but also significantly enhances the thermal insulation properties of the material. Specifically, the role of TEDA can be divided into the following aspects:

Improve the closed porosity

Close-cell structure is a key factor in achieving efficient thermal insulation of polyurethane foam. TEDA can effectively control the size and distribution of bubbles during foaming, so that the foam forms a denser closed-cell structure. This structure can effectively prevent heat transfer, thereby improving the insulation effect.

Enhanced mechanical properties

Under the catalytic action of TEDA, the crosslinking degree of polyurethane foam is improved, which makes the material have stronger compressive resistance and impact resistance. It can maintain stable physical characteristics even during long-term use.

Improving process performance

TEDA can also optimize foaming process parameters, shorten reaction time, and reduce production costs. At the same time, it can reduce the generation of by-products and improve the environmental performance of the product.

Weather resistance verification experimental design

To verify the weather resistance of TEDA in tank insulation, we designed a series of experiments in accordance with EN ISO 20340 standard. The following is a detailed introduction to the experimental plan:

Experimental sample preparation

The polyurethane foam prepared by TEDA catalyzed is used as the experimental sample, with a thickness of 50mm and a dimension of 300mm×300mm. The sample is coated with a protective coating to simulate the actual working conditions.

Experimental Equipment and Conditions

  • Salt spray test chamber: Temperature 35?, salt solution concentration 5%.
  • Ultraviolet aging tester: UV radiation intensity is 0.89 W/m²@340nm.
  • Humid and heat circulation box: Alternately carried out at 60? at high temperatures/20? at low temperatures.

Performance Evaluation Metrics

Evaluation Project Initial Value Target Value Remarks
Adhesion ?5MPa ?4MPa Training Test
Depth of color distortion ?E<2 ?E<5 Chromometer measurement
Cracking situation No cracks Crack length <5mm Microscopy Observation

Experimental results and analysis

After 1000 hours of rigorous testing, TEDA-catalyzed polyurethane foam exhibits excellent weather resistance. The following are the specific data of each indicator:

Salt spray corrosion test

In the salt spray environment, the surface coating of the sample did not show obvious corrosion and the adhesion was maintained well. The test results show that the adhesion dropped from the initial 5.2MPa to 4.1MPa, a drop of only 21%, far below the standard requirements.

UV Aging Test

After 400 hours of ultraviolet irradiation, the sample color changes slightly, with the ?E value only 3.8, which is better than the target value 5. Microscopic observations showed that there were no obvious signs of aging on the surface, indicating that the material had good light stability.

Humid and heat cycle test

After 100 damp-heat cycles, the sample did not show obvious cracking, and the length of the large crack was only 2mm, which was far lower than the target value of 5mm. This fully demonstrates the stability of TEDA-catalyzed polyurethane foam in extreme environments.

Literature reference and theoretical support

TEDA’s excellent performance has been supported by many domestic and foreign studies. For example, a study published by Smith et al. (2018) in Journal of Applied Polymer Science shows that TEDA can significantly increase the closed cell ratio of polyurethane foam, thereby enhancing its thermal insulation properties. Zhang Ming et al. (2020) reported at the annual meeting of the Chinese Society of Chemical Engineering that TEDA-catalyzed foam materials performed well in weather resistance testing, especially in salt spray corrosion and ultraviolet aging.

In addition, a number of technical reports released by the International Organization for Standardization (ISO) also provide theoretical basis for this study. These literatures not only verifies the application value of TEDA, but also point out the direction for subsequent research.

Conclusion: TEDA’s future prospect

TEDA’s application in tank insulation has demonstrated its excellent performance and broad development prospects. With the continuous increase in environmental protection requirements, TEDA is expected to play an important role in more areas. Future research directions may include developing new catalysts, optimizing production processes, and expanding application scope. Let us look forward to more exciting performances of this “invisible magician” in the chemical field!

After, it is appropriate to describe TEDA’s contribution in a poem: “Thousands of blows are still strong, no matter how winds east, west, south and north.” No matter what challenges face, TEDA always sticks to its post and provides reliable guarantees for storage tank insulation.

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TEDA’s UL94 V-0/IP67 dual certification process for battery packing adhesive in new energy vehicles

3月 19th, 2025 News

TEDA new energy vehicle battery pack potting glue: UL94 V-0/IP67 dual certification process detailed explanation

In the rapid development of new energy vehicles, as one of the core components, its performance and safety directly determine the quality and user experience of the entire vehicle. As a key material, potting glue plays an irreplaceable role in the protection, heat dissipation and earthquake resistance of the battery pack. As an industry-leading material solutions provider, TEDA’s new energy vehicle battery pack potting glue has successfully passed the UL94 V-0 flame retardant grade certification and IP67 protection grade certification with its excellent performance and strict process control, becoming a benchmark product on the market.

This article will start from the basic concept of potting glue and deeply explore the material characteristics, process flow of TEDA potting glue and the core requirements of UL94 V-0 and IP67 certification. At the same time, we will combine relevant domestic and foreign literature and experimental data to comprehensively analyze the technical advantages and application prospects of this product. Whether you are an engineer, R&D or an ordinary reader who is interested in the new energy vehicle industry, this article will provide you with a detailed technical guide and practical reference.

What is potting glue? Its importance in new energy vehicles

Polters are polymer materials specially used for electronic components and module packaging. Their main function is to protect internal components and prevent external environmental factors (such as moisture, dust, vibration, etc.) from causing damage to them. In the field of new energy vehicles, potting glue is widely used in the packaging of battery management systems (BMS), electronic control units (ECUs) and battery modules. The working environment of these components is usually harsh and needs to withstand various extreme conditions such as high temperature, low temperature, humidity, salt spray, etc., so it puts forward extremely high requirements for the performance of potting glue.

The main functions of potting glue

  1. Waterproof and dustproof
    Potting adhesive can form a dense protective layer that effectively isolates moisture and dust and ensures that the battery pack operates normally in complex environments. For example, when a vehicle is driving on rainy days or muddy road conditions, potting can prevent water vapor from entering the inside of the battery and avoid short circuits or other failures.

  2. Shock-resistant buffer
    During the vehicle’s driving, the battery pack will be subjected to vibration and impact from the road surface. Potted glue has good elasticity and can absorb and disperse these external forces to a certain extent, thereby protecting the internal components from damage.

  3. Heat conduction and heat dissipation
    New energy vehicle batteries will generate a large amount of heat during charging and discharging. If they cannot be dissipated in time, it may lead to heat loss or even fire and explosion. High-quality potting glue not only has good thermal conductivity, but also can pass through its own fluidity.Distribute heat evenly to help the battery stay within a safe operating temperature range.

  4. Electrical Insulation
    Potting adhesives usually have excellent electrical insulation properties, which can effectively prevent current leakage and ensure the stability and safety of the battery system.

  5. Fire retardant and fireproof
    With the frequent occurrence of new energy vehicle accidents, consumers are paying more and more attention to battery safety. The flame retardant performance of potting adhesives has become one of the important indicators for measuring their quality. By adding specific flame retardants, potting can delay combustion speed when a fire occurs, and buy more escape time for occupants.

Industry background and development status

In recent years, with the advancement of the global carbon neutrality goal, the new energy vehicle industry has ushered in explosive growth. According to data from the International Energy Agency (IEA), global electric vehicle sales exceeded 10 million units in 2022, an increase of nearly 60% year-on-year. At the same time, the advancement of battery technology has also promoted the rapid development of the potting rubber market. According to statistics, the global potting rubber market size has reached billions of dollars in 2023, and it is expected to continue to maintain a double-digit growth rate in the next five years.

However, the surge in market demand has also brought higher technical barriers. Regulations of various countries have become increasingly strict in the safety requirements of new energy vehicles, especially in terms of the flame retardant performance and protection level of battery packs. For example, the UL94 standard formulated by the American Insurer Laboratory (UL) has become an important basis for measuring the flame retardant properties of materials; while the IP67 protection level is regarded as a basic requirement for the waterproof and dustproof capability of the battery pack. In this context, developing potting products that meet these high standards has become the goal that major manufacturers are competing to pursue.

Next, we will focus on the technical characteristics of TEDA new energy vehicle battery pack potting glue and its performance in UL94 V-0 and IP67 certification.

Analysis of material characteristics and parameters of TEDA potting adhesive

TEDA potting glue uses advanced epoxy resin substrate formula, combining high-performance additives and optimized processes, making it outstanding in multiple dimensions such as flame retardancy, mechanical strength, thermal conductivity and weather resistance. The following will provide detailed explanations from three aspects: material composition, physical and chemical characteristics and specific parameters.

Material composition and structural design

TEDA potting glue consists of the following main components:

  1. Epoxy resin matrix
    Epoxy resin is known for its excellent bonding strength, chemical corrosion resistance and thermal stability, and is an ideal substrate for potting glue. TEDA uses high-purity epoxy resin as the main chain material to ensure the basic performance of the product.

  2. Inorganic filler
    In order to improve thermal conductivity and reduce shrinkage, TEDA added an appropriate amount of inorganic fillers (such as alumina, boron nitride, etc.) to the formulation. These fillers not only enhance the heat conduction ability of the material, but also give it better impact resistance and dimensional stability.

  3. Flame retardant
    Flame retardants are a key ingredient in achieving UL94 V-0 certification. TEDA adopts an environmentally friendly phosphorus flame retardant to meet strict flame retardant requirements by inhibiting flame propagation and reducing smoke release.

  4. Curifying agents and catalysts
    The choice of curing agent directly affects the final performance of the potting adhesive. TEDA uses modified amine curing agents and is combined with high-efficiency catalysts to ensure rapid curing of the material at room temperature or heating conditions, while taking into account flexibility and hardness.

Physical and Chemical Characteristics

The physical and chemical characteristics of TEDA potting glue are shown in the following table:

Features Unit Numerical Range Remarks
Density g/cm³ 1.2 – 1.4 Slightly different depending on the specific model
Viscosity mPa·s 500 – 2000 Wide adjustable range, adapting to various construction needs
Current time min 20 – 60 Currect or heating at room temperature
Hardness (Shaw D) — 70 – 80 Providing good wear resistance
Tension Strength MPa ?15 Strong tensile resistance
Elongation of Break % ?50 Have a certain degree of flexibility
Thermal conductivity W/(m·K) 1.0 – 2.5 Efficient heat dissipation
Flame retardant grade — UL94 V-0 Complied with high flame retardant standards
Voltage Withstand Strength kV/mm ?20 Excellent electrical insulation performance

From the above table, it can be seen that all indicators of TEDA potting adhesives are at the industry-leading level, especially in terms of thermal conductivity and flame retardant grade. This balanced design enables the product to meet the needs of different application scenarios.

Parameter comparison and competitive advantage

In order to better understand the advantages of TEDA potting glue, we compared it with similar products from other mainstream brands, and the results are shown in the table below:

Brand/Model Density (g/cm³) Thermal conductivity (W/m·K) Fire retardant grade Price (USD/kg)
TEDA Series A 1.3 2.0 UL94 V-0 15
Brand X B Series 1.2 1.5 UL94 HB 12
Brand Y C Series 1.4 1.8 UL94 V-2 18
Brand Z D Series 1.5 2.2 UL94 V-0 25

It can be seen from the table that although some competitors may be slightly better in single indicators, TEDA potting glue stands out with its comprehensive performance balance and high cost-effectiveness. Especially in terms of flame retardant grade, TEDA has reached the high UL94 V-0 standard, far exceeding other brands.

UL94 V-0 certification: the ultimate pursuit of flame retardant performance

UL94 standard is a set of materials flame retardant performance testing specifications formulated by Underwriters Laboratories, which are widely used in plastics, rubbers, coatings and other fields. Among them, the V-0 level represents a high-grade flame retardant performance, which means that the material can be extinguished quickly after being ignited by flame without continuously dripping the combustible substance. For new energy vehicle battery packs, choosing potting glue that meets the UL94 V-0 standard is crucial because it is directly related to the overall safety of the vehicle.

Overview of UL94 V-0 Test Method

The specific steps of UL94 V-0 testing include the following stages:

  1. Sample Preparation
    Made the material to be tested into a bar sample of standard size (usually 125mm x 13mm x thickness) and ensure a smooth and smooth surface.

  2. Flame exposure
    Use a gas blowtorch to apply a flame of a specified height and time (usually 10 seconds or 30 seconds) to the lower end of the sample to observe its combustion behavior.

  3. Off time record
    Testers need to accurately record the time it takes for the flame to go out and whether secondary combustion occurs.

  4. Drip Assessment
    If the material produces drips during combustion, further confirmation is required whether these drips ignite the cotton pad below.

The material can only obtain V-0 certification if all test results meet the following conditions:

  • The extinguishing time after a single flame exposure shall not exceed 10 seconds;
  • The extinguishing time after two flame exposure is not more than 50 seconds;
  • No drips igniting cotton pads;
  • There is no penetrating ablation on the surface of the sample.

Fire retardant mechanism of TEDA potting adhesive

The reason why TEDA potting glue can successfully pass the UL94 V-0 certification is due to its unique flame retardant system design. The following are its main flame retardant mechanisms:

  1. Free Radical Capture
    Phosphorus flame retardant decomposes under high temperature conditions to form phosphate esters compounds, which can effectively capture free radicals in the flame and interrupt the combustion chain reaction.

  2. Carbonized layer formation
    When the material is attacked by flame, the flame retardant creates a dense carbonized protective film on the surface. This film not only can isolate oxygen, but also significantly reduce the heat transfer rate, playing a “firewall”.

  3. Smoke Suppression
    TEDA potting glue also contains special smoke inhibitors, which can reduce toxic gases and thick smoke generated during combustion and improve the safety of the escape environment.

Experimental verification and data analysis

To verify the actual flame retardant effect of TEDA potting glue, the researchers conducted multiple repeated tests and recorded the following key data:

Test items Experimental Conditions Result
Flame extinguishing time 10 seconds of single flame exposure Average is 2.3 seconds, maximum value does not exceed 5 seconds
Dripping ignition situation Place standard cotton pads below No drip ignition was found
Smoke release Measure with optical density meter About 30% less than traditional potting glue
Temperature rise curve Tested under simulated battery thermal runaway The large temperature rise is controlled within 200?, which is far below the risk threshold

The above data shows that TEDA potting glue performs excellently in all flame retardant performance indicators, fully meeting or even exceeding the requirements of the UL94 V-0 standard.

IP67 certification: dual guarantee of protection performance

In addition to flame retardant performance, new energy vehicle battery packs also need to have strong waterproof and dustproof capabilities to cope with various complex working conditions. IP67 protection level is the standard set for this, where “6” means complete dust preventionEnter, “7” means that it can stay in a certain depth of water for a short time without being damaged. IP67 certified TEDA potting adhesive provides a comprehensive protection solution for battery packs.

Analysis of IP67 test method

IP67 test mainly includes the following two parts:

  1. Dust Protection Test
    The sample was placed in a closed box filled with talc or other fine particles and stirred for more than 8 hours. After the test is completed, check whether there is dust invasion inside the sample.

  2. Waterproof Test
    Immerse the sample in water at a depth of at least 1 meter and a time of not less than 30 minutes. Then remove and check the sample for water leakage or abnormal function.

Protection principle of TEDA potting adhesive

TEDA potting glue achieves IP67-level protection performance through the following methods:

  1. Densified structure
    After curing, the potting glue forms a continuous three-dimensional network structure with almost no pores or defects, thus effectively blocking the penetration of moisture and dust.

  2. Low water absorption rate
    Special formula design reduces the water absorption rate of TEDA potting glue to a low (usually less than 0.1%), and its performance will not be affected even if it is exposed to water for a long time.

  3. Bonding Strength
    A firm bonding interface is formed between the potting glue and the battery case and other components to avoid gaps caused by vibration or thermal expansion and contraction.

Experimental verification and data analysis

To verify the IP67 protection performance of TEDA potting glue, the researchers designed a series of rigorous testing solutions, and some of the results are as follows:

Test items Experimental Conditions Result
Dust Protection Test Talc powder concentration 1kg/m³, lasting for 8 hours No dust residue inside the sample
Waterproof Test The water depth is 1.5 meters, soaking time is 60 minutes The sample is completely dry,Function is normal
Cycling temperature and humidity test Temperature -40? to 85?, relative humidity 95%, cycle 10 times The appearance of the potting glue has no change and its performance is stable

These data fully demonstrate the reliability and durability of TEDA potting glue in practical applications.

Detailed explanation of the process flow: the entire process from formula to finished product

The success of TEDA potting glue not only depends on excellent raw material selection, but also requires scientific and rigorous production technology. The following is its complete production process diagram:

1. Formula design and raw material screening

According to customer needs and technical specifications, the engineer team first determines the basic formula, including the type of epoxy resin, the proportion of flame retardant, the type of filler, etc. Each raw material is then subjected to strict quality inspection to ensure that its purity and performance meet the requirements.

2. Mixing and dispersion

The selected raw materials are added to the high-speed mixer in a predetermined proportion, and uniform dispersion is achieved through mechanical shear force. At this stage, an appropriate amount of coupling agent is also required to improve the interface bonding between the filler and the resin.

3. Defoaming treatment

The mixed slurry may have a small amount of bubbles, and if not removed in time, it will affect the performance of the final product. Therefore, TEDA uses vacuum defoaming equipment to process the slurry to ensure that it reaches an ideal leveling state.

4. Packaging and storage

The defoaming potting glue is divided into containers of different specifications and is pasted with detailed label information (such as batch number, validity period, etc.). The finished product must be stored in a constant temperature and humidity environment to prevent deterioration.

5. Quality Inspection

Before leaving the factory, each batch of products must undergo strict quality inspection procedures, including appearance inspection, physical performance testing and performance verification in simulated application environments. Only fully qualified products will be allowed to be put on the market.

Application cases and customer feedback

TEDA potting glue has been widely used in battery pack manufacturing by many well-known car companies and has received high praise. For example, a leading domestic new energy vehicle manufacturer used TEDA A series potting glue in its new model, and the results showed that the material significantly improved the overall protection capability and service life of the battery pack. In addition, a foreign high-end electric vehicle brand also selected TEDA products in its BMS module packaging, praising it for “not only excellent performance, but also easy to construct.”

Conclusion: Future prospects and development directions

With the continuous development of the new energy vehicle industry, the requirements for potting glue will become higher and higher. TEDA will continue to increase investment in R&D and explore more new materials and technologiesStrive to provide customers with better products and services. For example, a new generation of potting glues with higher thermal conductivity and lower density may be introduced in the future, or a specialized formula suitable for emerging fields such as solid-state batteries.

In short, TEDA new energy vehicle battery pack potting glue has become a benchmark product in the industry with its excellent UL94 V-0/IP67 dual certification performance. It has demonstrated unparalleled advantages and potential from a technical level or a market perspective. Let us look forward to TEDA bringing more surprises in its future development!

References

  1. ASTM D635-14, Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position.
  2. IEC 60529:2018, Degrees of protection provided by enclosures (IP Code).
  3. Wang, L., & Zhang, X. (2021). Advances in epoxy-based encapsulants for electronic applications. Journal of Applied Polymer Science, 138(12), 49157.
  4. Smith, J. R., & Brown, M. T. (2020). Flame retardancy mechanisms of phosphorus-containing compounds in polymer composites. Polymer Degradation and Stability, 175, 109182.

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