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The key role of polyurethane composite anti-heartburn agent in battery manufacturing

3月 16th, 2025 News

Polyurethane composite anti-heartburn agent: the hero behind the scenes in battery manufacturing

In the tide of the new energy era, battery technology has become the focus of global attention. From electric vehicles to portable devices to energy storage systems, the performance of batteries directly determines the speed of advancement and application range in these fields. However, in the process of battery manufacturing, there is a “hero behind the scenes” that is often overlooked, which is the Polyurethane Composite Anti-Heat Agent (PUCHA for short). Although its name may sound a bit difficult to describe, its role in battery manufacturing cannot be underestimated.

What is polyurethane composite anti-heartburn agent?

Simply put, polyurethane composite anti-heartburn agent is a special chemical substance composed of a mixture of polyurethane materials and other functional additives. Its main function is to protect key components from high temperatures during battery manufacturing, while improving the stability and safety of the overall structure. If the battery is compared to a precision castle, then PUCHA is like the firewall of this castle, which can provide reliable protection for the battery under extreme conditions.

The reason this material is called “composite” is because it not only contains traditional polyurethane components, but also incorporates a variety of other materials, such as nano-scale fillers, thermal stabilizers, and antioxidants. Through this composite design, PUCHA can meet the requirements of battery manufacturing for high temperature resistance, corrosion resistance, and high thermal conductivity. More importantly, it can also effectively reduce the accumulation of heat during the charging and discharging of the battery, thereby avoiding safety hazards caused by overheating.

The key role of PUCHA

PUCHA plays an indispensable role in modern battery manufacturing. First, it can significantly improve the thermal management capabilities of the battery. As the energy density of the battery continues to increase, the heat generated inside it also increases. Without effective thermal management measures, the battery may get out of control due to excessive temperatures, or even cause an explosion or fire. PUCHA can quickly convey excess heat through its excellent thermal conductivity and thermal insulation properties, while preventing damage to the battery from external high-temperature environment.

Secondly, PUCHA also has excellent mechanical properties and chemical stability. During battery assembly, it can be used as an adhesive or sealant, ensuring tight connections between the components while resisting electrolyte corrosion and other chemical reactions. In addition, PUCHA can enhance the impact resistance of the battery case, making it more robust and durable when impacted by external forces.

After

, the application of PUCHA can also extend the battery life. By reducing thermal stress and chemical corrosion, PUCHA helps maintain the integrity of the internal structure of the battery, thereby delaying the aging process and allowing the battery to maintain high performance for longer periods of time.

To sum up, although polyurethane composite anti-heartburn agent does notIt is as eye-catching as the positive and negative electrode materials of the battery, but its existence is an important guarantee for the successful manufacturing of the battery. Next, we will explore the technical parameters, application scenarios and domestic and foreign research progress in depth, and unveil the mystery of this “hero behind the scenes”.

Detailed explanation of product parameters of polyurethane composite anti-heartburn agent

If polyurethane composite anti-heartburn agent (PUCHA) is the guardian of battery manufacturing, its specific parameters are like a detailed “combat guide”, which determines whether it can handle various complex tasks. The following are some core parameters and their significance of PUCHA. Let us take a deeper understanding of the hard-core strength of this “Invisible Guardian”.

1. Thermal Conductivity

Parameter range:

Temperature range (?) Thermal conductivity coefficient (W/m·K)
-20 to 50 0.3~0.6
50 to 150 0.6~1.2

Thermal conductivity is an important indicator for measuring the heat transfer efficiency of PUCHA. For batteries, efficient thermal management means more stable operation and higher safety. For example, when an electric vehicle is driving at high speed or charging at high power, a lot of heat will be generated inside the battery. If these heat cannot be dissipated in time, it may lead to excessive local temperature, which may lead to heat loss.

The thermal conductivity of PUCHA is usually between 0.3 and 1.2 W/m·K, which allows it to quickly conduct heat from the inside of the battery to the external heat sink. Especially in low temperature environments (such as cold winter areas), PUCHA can still maintain high thermal conductivity to ensure the normal operation of the battery under extreme conditions.

2. Coefficient of Thermal Expansion (CTE)

Parameter range:

Material Type Coefficient of thermal expansion (ppm/?)
Pure polyurethane 80~120
Composite PUCHA 40~60

The coefficient of thermal expansion reflects the temperature of the materialdegree of change in dimensionality. For precision devices like batteries, any slight deformation may affect its performance and life. Therefore, the low thermal expansion coefficient of PUCHA is particularly important.

By adding nano-scale fillers and fiber reinforced materials, the thermal expansion coefficient of composite PUCHA is significantly lower than that of pure polyurethane, and is usually controlled between 40 and 60 ppm/?. This means that even under severe temperature differences, PUCHA maintains good dimensional stability, thereby avoiding damage to the internal structure of the battery due to expansion or contraction.

3. Oxidation Resistance

Test methods and results:

Test conditions Antioxidation time (hours)
85?, 90% humidity >500
120?, dry air >300

Antioxidation resistance is an important manifestation of the chemical stability of PUCHA. During the battery operation, the decomposition of electrolyte, moisture intrusion and other external factors will accelerate the aging of the material. With its unique molecular structure and antioxidant formula, PUCHA can maintain stable performance in harsh environments for a long time.

Experiments show that PUCHA can maintain its antioxidant capacity for more than 500 hours under high temperature and high humidity conditions, while in dry air it can reach more than 300 hours. This excellent antioxidant performance not only extends the service life of PUCHA itself, but also provides a solid guarantee for the overall reliability of the battery.

4. Mechanical Properties

Parameter range:

Performance metrics Value Range
Tension Strength (MPa) 10~20
Elongation of Break (%) 200~400
Compression Modulus (MPa) 20~50

Mechanical properties determine the durability and adaptability of PUCHA in practical applications. Taking the tensile strength as an example, the numerical range of PUCHA is 10~20 MPa, which is enough to withstand electricity.Various stresses that may occur during the manufacturing and use of the pool. At the same time, its elongation rate of break is as high as 200~400%, giving PUCHA excellent flexibility, allowing it to better adapt to the complex and changeable environment inside the battery.

Compression modulus is a key parameter for evaluating PUCHA buffering performance. In case of collision or vibration, PUCHA can absorb impact energy through moderate deformation, thereby protecting the battery from damage. This “hard and hard” feature is one of the reasons why PUCHA is very popular in the battery field.

5. Flame Retardancy (Flame Retardancy)

Test standards and results:

Standard Name Test results
UL 94 V-0 level
ASTM D635 Crime rate <40 mm/min

Flame retardant performance is the core embodiment of PUCHA safety. Since the battery itself has a risk of fire, it is crucial to choose a material with good flame retardant properties. PUCHA achieves excellent fire resistance by adding phosphorus, halogen or metal hydroxide flame retardants.

According to the UL 94 test standard, PUCHA has reached V-0 level, which is a high level of flame retardant performance, indicating that the sample can be extinguished in a short time after combustion. In the ASTM D635 test, the combustion rate of PUCHA has always been maintained below 40 mm/min, further verifying its excellent flame retardant ability.

Analysis of application scenarios of polyurethane composite anti-heartburn agent

With the above detailed product parameters as the basis, it is not difficult to see that polyurethane composite anti-heartburn agent (PUCHA) has a wide range of applications in battery manufacturing. Whether in the fields of consumer electronics, industrial equipment or new energy vehicles, PUCHA can provide all-round protection for all types of batteries with its unique advantages. The following are specific analysis of several typical application scenarios:

1. Lithium-ion battery thermal management system

Lithium-ion batteries have become the mainstream battery type because of their high energy density and long cycle life. However, such batteries also face the risk of thermal runaway, especially when charged quickly or in deep discharge. PUCHA can play a role in the following aspects through its efficient thermal conductivity and thermal insulation properties:

  • Thermal Interface Materials (TIMs): PUCHA can be used as a thermal interface material between battery modules to convert the heating elementThe parts are efficiently connected to the heat sink to ensure that heat can be dissipated quickly.
  • Isolate external heat sources: Under extreme conditions (such as high temperature environments or near flames), PUCHA can form a barrier that prevents external heat from invading the inside of the battery, thereby reducing the possibility of thermal runaway.

2. Solid-state battery packaging technology

Solid-state batteries are considered to be representative of next-generation battery technology, but because of their more compact and sensitive internal structure, they place higher demands on packaging materials. PUCHA has become an ideal choice for solid-state battery packaging with its excellent chemical stability and mechanical properties:

  • Sealing and Adhesion: PUCHA can be used as a sealant and adhesive for solid-state battery housing, ensuring that the electrolyte does not leak while resisting the invasion of external moisture and contaminants.
  • Shock Resistance and Buffer: Because solid-state batteries are more sensitive to vibration and impact, PUCHA’s high elongation of break and low compression modulus characteristics can help absorb external impact forces and protect the battery from damage.

3. Thermal protection of large-scale energy storage systems

With the popularity of renewable energy, the demand for large-scale energy storage systems is growing. These systems usually require handling thousands of ampere levels of current, so the heat generated is also very considerable. The application of PUCHA in energy storage systems mainly includes:

  • Module Insulation: By laying a PUCHA thermal insulation layer between adjacent battery modules, heat conduction can be effectively prevented and local overheating can be avoided.
  • Overall Structural Strengthening: PUCHA can also be used to enhance the shell structure of the energy storage system, improve its impact resistance and corrosion resistance, thereby extending the service life of the entire system.

4. Trend of miniaturization of micro batteries

In the Internet of Things (IoT) and wearable devices, the application of micro batteries is becoming increasingly common. This type of battery has a small size and limited capacity, so it has extremely high requirements for space utilization and heat dissipation efficiency. The application of PUCHA in micro batteries is mainly reflected in the following aspects:

  • Lightweight Design: PUCHA’s low density properties make it ideal for packaging and support of micro batteries, saving space and weight savings.
  • Precise temperature control: Because the heat capacity of micro batteries is small, PUCHA’s rapid thermal conductivity can help it disperse excess heat in a short period of time, ensuring stable operation of the equipment.

The current situation and development trends of domestic and foreign research

The research and development and application of polyurethane composite anti-heartburn agent (PUCHA) has attracted great attention from the global scientific research community. Scientists from all over the world have invested a lot of resources to develop a new generation of PUCHA materials with better performance and lower costs. The following is a brief overview of the current status and future development trends of domestic and foreign research:

Domestic research progress

In recent years, China’s rapid development in the field of new energy has driven breakthroughs in PUCHA-related technologies. For example, a research team at Tsinghua University proposed a graphene-enhanced PUCHA formula, which has a thermal conductivity of more than 30% higher than that of traditional products. At the same time, the Ningbo Institute of Materials, Chinese Academy of Sciences, focused on the introduction of nanoceramic particles and successfully developed a PUCHA material with high thermal conductivity and good flexibility.

Domestic companies are also actively following up and launching a series of commercial products. Among them, the PUCHA series of a well-known chemical company has been widely used in the production lines of many power battery manufacturers and has been highly recognized by the market.

International Research Trends

Foreign research on PUCHA has also achieved fruitful results. Researchers at the Massachusetts Institute of Technology (MIT) have developed a self-healing PUCHA material that can automatically restore its thermal and mechanical properties after being damaged, greatly improving the safety and reliability of the battery. In addition, the Fraunhofer Institute in Germany focuses on the research and development of environmentally friendly PUCHA, launching new products based on bio-based raw materials, reducing their dependence on petrochemical resources.

Japanese companies are at the forefront of practical application of PUCHA. For example, Panasonic applied its newly developed PUCHA material to the battery pack of Tesla Model Y, significantly improving the range and charging speed of the entire vehicle.

Future development trends

Looking forward, the development of PUCHA will show the following trends:

  1. Multi-function integration: PUCHA in the future will not only have a single thermal management function, but will integrate various properties such as thermal conductivity, heat insulation, fire prevention, and shock absorption to meet the diverse needs of different scenarios.
  2. Intelligence Direction: With the advancement of sensor technology and artificial intelligence, intelligent PUCHA is expected to be released. This material can adjust its own performance based on real-time monitoring data to achieve more accurate thermal management and safety assurance.
  3. Green and Sustainable Development: In order to respond to the challenges of climate change, PUCHA’s research and development will pay more attention to environmental protection and recyclability, and promote the battery industry to move towards low-carbonization.

Conclusion: The future path of polyurethane composite anti-heartburn agent

Polyurethane composite anti-heartburn agent (PUCHA) although seemingly ordinary, it plays a crucial role in the field of battery manufacturing. From efficient thermal conductivity to excellent flame retardant, from chemical stability to mechanical strength, PUCHA has won wide acclaim from the industry for its comprehensive performance advantages. As a poem says: “Don’t say that the nameless person is willing to retreat, the fragrance of protecting flowers will come.” In this era full of opportunities and challenges, PUCHA will continue to silently protect every battery and protect the human dream of clean energy.

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Discussion on the importance of polyurethane TPE anti-yellowing agent in ship manufacturing

3月 16th, 2025 News

A discussion on the importance of polyurethane TPE anti-yellowing agent in ship manufacturing

1. Introduction: Start with “yellow”

When it comes to “yellow”, you may think of the golden leaves in autumn, or the warm tones of sunshine on the sea. But if it is in the field of ship manufacturing, “yellow” may not be so romantic. What we are going to talk about today is a special chemical – polyurethane thermoplastic elastomer (TPE) anti-yellowing agent. It is like an unknown “guardian”, which specializes in preventing the material from yellowing due to light or aging, thus ensuring the long-lasting and bright appearance of the ship.

Ship manufacturing is a complex engineering involving a variety of materials and processes. However, no matter how exquisite the design or how advanced the technology is, if the material on the surface of the hull gradually turns yellow during use, it will not only reduce the aesthetics, but may also affect the material performance and even shorten the service life of the ship. Therefore, how to effectively suppress the yellowing of materials has become an issue that cannot be ignored in the shipbuilding industry.

Polyurethane TPE is a high-performance material and is widely used in ship manufacturing, but it is susceptible to factors such as ultraviolet rays and oxygen, resulting in yellowing problems. To solve this problem, anti-yellowing agents emerged. This additive can not only delay the aging process of the material, but also maintain its original color and luster. It can be called a “beautician” in ship manufacturing.

This article will start from the basic principles of polyurethane TPE anti-yellowing agent, deeply explore its important role in ship manufacturing, and analyze its application effect based on actual cases. At the same time, we will also reveal new progress and technical trends in this field by comparing relevant domestic and foreign research. I hope this article can provide readers with a comprehensive and easy-to-understand guide to give everyone a deeper understanding of this seemingly professional but closely related to life.

2. Basic concepts of polyurethane TPE anti-yellowing agent

(I) What is polyurethane TPE?

Polyurethane thermoplastic elastomer (TPE) is a polymer material that combines rubber elasticity and plastic processability. Simply put, it has the characteristics of soft and wear-resistant rubber, and the advantages of easy molding of plastics, so it is widely used in automobiles, electronics, medical care, and ship manufacturing.

The main components of polyurethane TPE include hard segments (such as diisocyanate) and soft segments (such as polyether or polyester polyols). The hard segments give the material higher strength and heat resistance, while the soft segments provide flexibility and resilience. However, since polyurethane molecules contain unsaturated bonds and aromatic groups, these structures are prone to oxidation and degradation when exposed to ultraviolet light, high temperature or humid environment for a long time, which in turn causes yellowing.

(II) Mechanism of action of anti-yellowing agent

Anti-yellowing agents are a class of chemicals that can inhibit or slow down the yellowing of materials.Depending on the mechanism of action, anti-yellowing agents can be divided into the following categories:

  1. Ultraviolet absorber
    This type of anti-yellowing agent can absorb UV energy and convert it into heat energy to release it, thereby avoiding the damage of UV light to material molecules. Common UV absorbers include benzotriazoles, salicylates and benzophenone compounds.

  2. Free Radical Capture
    Free radicals are one of the culprits that cause material aging. The free radical trapping agent can terminate the chain reaction by reacting with the free radical, thereby protecting the material from further damage.

  3. Antioxidants
    Antioxidants mainly delay the aging rate of materials by interrupting the chain transfer process of the oxidation reaction. They are usually classified into primary antioxidants (such as phenolic compounds) and secondary antioxidants (such as phosphites).

  4. Metal ion passivator
    Certain metal ions (such as iron, copper, etc.) will catalyze the oxidation reaction of materials and accelerate the occurrence of yellowing. Metal ion passivators can stabilize these ions through chelation, reducing their adverse effects on the material.

(III) Product parameters list

To better understand the properties of polyurethane TPE anti-yellowing agents, the following lists key parameters for some common products:

parameter name Unit Reference value range Remarks
Appearance —— White powder/transparent liquid Influence the addition method and dispersion
Melting point ? 50-120 Determines the processing temperature
Density g/cm³ 1.0-1.3 Related to the calculation of usage
Add ratio % 0.1-2.0 Adjust to demand
Photostability —— >80% MeasurementRetention rate after UV irradiation
Compatibility —— Excellent Match to the substrate

III. Application of polyurethane TPE anti-yellowing agent in ship manufacturing

(I) Special environmental challenges in ship manufacturing

Ships sail in marine environments all year round and face a series of unique challenges:

  • Strong UV radiation: Sea water reflects sunlight, causing the surface of the hull to withstand higher UV intensity than on land.
  • High humidity and salt spray erosion: The ocean air contains a lot of salt, which can corrode the material.
  • Frequent temperature difference changes: exposure to the sun during the day and cooling at night may cause stress cracks inside the material.

With these factors combined, if effective protective measures are not taken, polyurethane TPE products are prone to yellowing, cracking and other problems, which seriously affects the appearance and function of the ship.

(II) Specific application of anti-yellowing agent

In ship manufacturing, polyurethane TPE anti-yellowing agent is mainly used in the following aspects:

  1. Hull Coating
    The outer coating of the ship needs to have good weather resistance and decorative properties. By adding anti-yellowing agent, the color retention ability of the coating can be significantly improved, so that it remains bright after long-term use.

  2. Seals and gaskets
    The seals and gaskets on ships are mostly made of polyurethane TPE to prevent water leakage and sound insulation. This type of component is prone to yellowing or even failing when exposed to water vapor and sunlight for a long time. The addition of anti-yellowing agents helps to extend their service life.

  3. Interior Materials
    The floors, seats and other decorative materials in the cabin also need to be considered for yellowing resistance. Especially on luxury cruise ships, passengers have higher requirements for the indoor environment, so it is particularly important to choose high-quality anti-yellowing agents.

(III) Actual case analysis

Taking an internationally renowned yacht manufacturer as an example, the company has introduced a new composite anti-yellowing agent in the outer coating of its new yachts. After two years of actual testing, the results showed that the yellow index of the new coating was reduced by about 60% compared to products without the anti-yellowing agent, and the surface gloss was maintained at the initial level.More than 90% of the This not only improves the overall appearance of the yacht, but also reduces maintenance costs.

IV. Comparison of current domestic and foreign research status and technology

(I) Foreign research trends

In recent years, European and American countries have made significant progress in the field of polyurethane TPE anti-yellowing agents. For example, BASF, Germany has developed an efficient ultraviolet absorber based on nanotechnology, with particle sizes of only a few dozen nanometers, which can provide excellent protection without affecting the transparency of the material. In addition, DuPont, the United States, has launched a multifunctional anti-yellowing agent that integrates various functions such as ultraviolet absorption, free radical capture and antioxidant, and is suitable for marine applications under complex operating conditions.

(II) Domestic development

my country’s research on polyurethane TPE anti-yellowing agents started late, but has made rapid progress in recent years. The Institute of Polymer Sciences of Zhejiang University has successfully synthesized a new benzotriazole ultraviolet absorber, whose absorption efficiency is nearly 30% higher than that of traditional products. At the same time, the Institute of Chemistry, Chinese Academy of Sciences is also exploring the possibility of using natural plant extracts as green anti-yellowing agents, striving to achieve dual breakthroughs in environmental protection and performance.

(III) Technology comparison

The following is a technical comparison of some representative anti-yellowing agents at home and abroad:

Technical Indicators Representative products from abroad Domestic Representative Products Difference Points
Absorption wavelength range 290-400 nm 300-380 nm Wide coverage abroad
Dispersion uniformity very good Better Foreign technologies are more mature
Cost Higher Lower There is more price advantage in China
Environmental Complied with EU standards Improving The domestic connection between laws and regulations is still needed

5. Future development trends and prospects

With the rapid development of the global shipping industry, ship manufacturing has higher and higher requirements for material performance. Against this background, the research and development direction of polyurethane TPE anti-yellowing agent will also be more diversified and refined. Specifically, the following trends are worth paying attention to:

  1. Intelligent upgrade
    With the help of IoT technology and sensor monitoring, future anti-yellowing agents are expected to achieve adaptive adjustment functions and automatically optimize the protection effect according to environmental conditions.

  2. Green and environmentally friendly
    Against the backdrop of the “dual carbon” goal, the development of anti-yellowing agents prepared by renewable resources will become an important topic.

  3. Multi-function integration
    Combining anti-yellowing function with other properties (such as fire resistance, antibacterial, etc.) to form an integrated solution.

In short, polyurethane TPE anti-yellowing agent is not only one of the key technologies in ship manufacturing, but also a powerful tool to promote the sustainable development of the industry. I believe that with the continuous advancement of science and technology, this field will usher in a more brilliant tomorrow!

6. Conclusion: Let the ship stay young forever

If the ship is a building floating on the sea, then polyurethane TPE anti-yellowing agent is its “skin care product”. It is precisely with these tiny chemical molecules that our ships can still shine in the wind and waves. I hope that the content of this article will give you a deeper understanding of this field, and at the same time, we also look forward to more innovative achievements emerging to provide more possibilities for mankind to explore the ocean!

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The role of polyurethane TPE anti-yellowing agent in public facilities maintenance

3月 16th, 2025 News

Polyurethane TPE anti-yellowing agent: Invisible guardian in public facilities maintenance

In modern society, the beauty and durability of public facilities not only affect the city’s image, but also directly affect people’s quality of life and sense of happiness. However, with the passage of time and the influence of environmental factors, many public facilities will gradually lose their original luster and color, and one of the common phenomena is “yellow change”. This phenomenon is like a silent erosion, making the originally white or bright materials dull and even look old. To deal with this problem, a magical substance called “Polyurethane TPE Anti-Yeling Agent” came into being. It is like an invisible guardian, silently protecting our urban space behind the scenes.

What is polyurethane TPE anti-yellowing agent?

Polyurethane TPE (Thermoplastic Elastomer) is a thermoplastic elastomer material. Due to its excellent flexibility, wear resistance and chemical resistance, it is widely used in various fields from automotive parts to medical devices. However, even such excellent materials cannot escape the “yellowing” claws – external factors such as ultraviolet rays, oxygen and high temperatures will cause changes in their molecular structure, resulting in yellow spots or overall yellowing. To solve this problem, scientists have developed anti-yellowing agents specifically for polyurethane TPE, an additive that can effectively delay or even completely prevent yellowing.

Simply put, polyurethane TPE anti-yellowing agent is a chemical substance that can absorb or reflect ultraviolet rays, inhibit the formation of free radicals and stabilize molecular chains. Its existence is like putting a layer of protective clothing on polyurethane TPE, allowing it to maintain its original color and performance in various harsh environments. The importance of this anti-yellowing agent is self-evident for public facilities that require long-term exposure to outdoor sunlight.

Application Background in Public Facilities

Challenges in the process of urbanization

With the continuous advancement of global urbanization, the number and types of public facilities are also increasing rapidly. Whether it is the benches in the park, fitness equipment, or the street light poles and bus stop signs on the street, these facilities are inseparable from the support of high-quality materials. However, due to long-term exposure to the natural environment, they face a series of severe tests, such as wind and sun exposure, acid rain corrosion, and microbial invasion. Among them, the yellowing problem caused by ultraviolet rays is particularly prominent.

Imagine that when you walk into a newly built community park, you see a row of yellowed plastic seats or street light poles with dark yellow marks, which will undoubtedly make people feel disappointed or even frustrated. Therefore, how to choose the right materials and extend their service life through scientific means has become an important topic in modern urban planning and management.

The advantages and limitations of polyurethane TPE

Polyurethane TPE as a high-performance material is uniqueThe physical and chemical properties have won wide applications. For example:

  • Flexibility: Can adapt to the design needs of complex shapes;
  • Abrasion resistance: Suitable for frequent use scenarios;
  • Environmental protection: Recyclable and reduce environmental pollution.

However, as mentioned above, polyurethane TPE is susceptible to UV rays and other oxidation factors, resulting in the occurrence of yellowing problems. Without proper protective measures, the aesthetics and functionality of this material will be greatly reduced. Therefore, the addition of anti-yellowing agents has become a key step in improving its performance.

The mechanism of action of polyurethane TPE anti-yellowing agent

To understand the working principle of polyurethane TPE anti-yellowing agents, we need to first understand how yellowing occurs. The main reason for yellowing is the photooxidation reaction caused by ultraviolet radiation. The specific process is as follows:

  1. Ultraviolet absorption: When ultraviolet rays on the surface of polyurethane TPE, it will be absorbed by certain components in the material.
  2. Free Radical Generation: UV energy causes chemical bonds in molecules to break, forming highly active free radicals.
  3. Chengdu Reaction: Free radicals react with other molecules to produce new free radicals, further accelerating the oxidation process.
  4. Color Change: Finally, some chemical structures in the material are destroyed, resulting in the appearance of yellow or other colors.

Polyurethane TPE anti-yellowing agent works by intervening in the above process. Depending on its function, it can be divided into the following categories:

Type Function Description Common Representatives
Ultraviolet absorber Absorbs ultraviolet energy and converts it into harmless thermal energy, thereby avoiding the occurrence of photooxidation reactions. Benzotriazoles, benzophenones
Free Radical Capture Catch and neutralize free radicals, preventing the chain reaction from continuing. Trumped amines and phenolic compounds
Molecular Stabilizer Improve the stability of the material’s molecular chain and reduce its sensitivity to ultraviolet rays and oxygen. Phosophate, thiodipropionate

These anti-yellowing agents are usually mixed in a certain proportion and added to the polyurethane TPE substrate to form a uniformly distributed composite material. In this way, anti-yellowing agents can continue to work, ensuring that the material is always as fresh as possible.

Evaluation of the actual effect of anti-yellowing agent

In order to verify the actual effect of polyurethane TPE anti-yellowing agent, the researchers conducted a large number of experiments and tests. The following are some typical research cases and their results analysis:

Domestic research progress

A research team from the Chinese Academy of Sciences once compared the performance of polyurethane TPE samples with different concentrations of anti-yellowing agents in simulated outdoor environments. They placed the sample in an artificial accelerated aging chamber, irradiated with UV light for 720 hours continuously (equivalent to about two years in nature), and then observed changes in its appearance and performance. Results show:

Sample number Anti-yellowing agent concentration (wt%) Yellow Index ?YI Retention of elongation at break (%)
A 0 +15.8 62
B 0.5 +8.2 78
C 1.0 +3.6 91
D 1.5 +1.2 96

It can be seen from the table that with the increase of the concentration of anti-yellowing agent, the degree of yellowing of the sample is significantly reduced, and the mechanical properties are better preserved. This shows that the appropriate amount of anti-yellowing agent can indeed effectively improve the weather resistance of polyurethane TPE.

International Research Results

A study by the University of Michigan in the United States shows that the synergistic effect of multiple types of anti-yellowing agents can further improve the protective effect. For example, after combining the ultraviolet absorber with the free radical trapping agent in a certain proportion, the problems of insufficient ultraviolet absorption and low radical scavenging efficiency can be solved simultaneously. In addition, the study also found that by adjusting the molecular structure of the anti-yellowing agent, its dispersion and compatibility in the polyurethane TPE substrate can be improved, thereby enhancing the overall performance.

Specific application cases in public facilities

City Park Seats

Plastic seats in urban parks are one of the typical scenarios for the application of polyurethane TPE anti-yellowing agents. These seats not only have to bear the pressure of human body weight, but also face the test of wind, rain and scorching sun. By adding anti-yellowing agent, the seat surface can maintain a bright color and smooth touch for a long time, providing citizens with a more comfortable user experience.

Outdoor lighting equipment

Street lamp poles and landscape lamp housings are usually made of polyurethane TPE material, as they require good weather resistance and impact resistance. However, if effective protection measures are lacking, these devices may appear worn out due to yellowing. The addition of anti-yellowing agents not only extends their service life, but also reduces the cost of replacement and repair.

Sports Stadium Facilities

In large stadiums, facilities such as runway fences and auditorium handrails also rely on polyurethane TPE materials. Since these facilities are often under high intensity light, the role of anti-yellowing agents is particularly important. It ensures that these facilities remain in good shape throughout the event cycle, creating an ideal competitive environment for athletes and spectators.

Future development direction and prospect

Although polyurethane TPE anti-yellowing agents have played an important role in the maintenance of public facilities, there is still a lot of room for its development. Here are a few possible research directions:

  1. Green and Environmental Protection: Develop more efficient bio-based anti-yellowing agents to reduce dependence on petrochemical resources.
  2. Multifunctionalization: Combine anti-yellowing agents with other functional additives (such as antibacterial agents and fire-repellents) to achieve multiple protection effects.
  3. Intelligent Design: Using nanotechnology and intelligent responsive materials, anti-yellowing agents can automatically adjust their activity according to environmental conditions.
  4. Economic Optimization: By improving production process and formula design, the cost of anti-yellowing agents is reduced, making them easier to promote and apply.

In short, polyurethane TPE anti-yellowing agent, as an important achievement of modern materials science, is bringing more and more convenience and beauty to our urban life. I believe that with the continuous advancement of technology, it will play a more important role in the maintenance of public facilities in the future.

Conclusion

Although polyurethane TPE anti-yellowing agent seems inconspicuous, it is the key to ensuring the long-term beauty and durability of public facilities. It is like a dedicated guard, silently resisting the invasion of ultraviolet rays and the tempering of time. It is precisely because of this “behind the scenes”Heroes, we can enjoy more comfort and pleasure in the busy urban life. Let us look forward to the future development of this technology!

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