Polyurethane TPE anti-yellowing agent: the guardian of high-end packaging materials
In today's era of "appearance is justice", whether it is food, cosmetics or electronic products, packaging has long become an important communication bridge between products and consumers. However, over time, many packaging materials will experience headache-inducing "yellowing" phenomena, which not only affects the appearance of the product, but also may make consumers doubt the quality of the product. To solve this problem, polyurethane thermoplastic elastomer (TPE) and anti-yellowing agents came into being, becoming a shining pearl in the field of high-end packaging materials.
What is polyurethane TPE anti-yellowing agent?
Definition and Function
Polyurethane TPE is a polymer material that combines rubber elasticity and plastic processability. It is highly favored in packaging materials due to its excellent flexibility, wear resistance and chemical resistance. However, this material is prone to oxidation reactions under light or high temperature environments, causing the surface color to gradually turn yellow and affects the user experience. To solve this problem, scientists have developed anti-yellowing agents specifically targeted at polyurethane TPE. This type of additive effectively delays or even prevents the yellowing process of the material by capturing free radicals or inhibiting the photooxidation reaction, thereby maintaining the bright appearance of the packaging material.
Simply put, polyurethane TPE anti-yellowing agent is like a loyal "guardian", always protecting the packaging materials from the outside environment and ensuring that they are always as new.
Classification of Anti-Yeling Agents
Depending on the mechanism of action, polyurethane TPE anti-yellowing agents are mainly divided into the following categories:
- Ultraviolet absorber: By absorbing ultraviolet energy, it is converted into harmless heat energy release, preventing oxidation reactions caused by ultraviolet rays.
- Antioxidants: By capturing free radicals, interrupting the oxidation chain reaction, thereby delaying the aging process of the material.
- Photostabilizer: By changing the photochemical properties of the material, reducing the photodegradation rate and enhancing the weather resistance of the material.
- Compound anti-yellowing agent: Combined with a variety of functional ingredients, it provides a more comprehensive protective effect.
These anti-yellowing agents can be selected and matched according to the specific application scenario to achieve the best use effect.
Application cases of polyurethane TPE anti-yellowing agent in high-end packaging materials
As consumers continue to increase their product packaging requirements, polyurethane TPE anti-yellowing agents are increasingly widely used in the high-end packaging field. Here are some typical case analysis.
Case 1: Cosmetic packaging
The cosmetics industry has extremely high requirements for packaging, not onlyIt requires good sealing and durability, and an attractive appearance design. Polyurethane TPE material has become the first choice for many cosmetic brands with its unique soft touch and rich color expression. However, cosmetic bottle caps or hoses exposed to light for a long time may turn yellow, affecting the brand image.
A internationally renowned cosmetics brand uses polyurethane TPE material with anti-yellowing agent in its new essence packaging. After a year of actual testing, the packaging material remains as white as before under direct sunlight, which has been highly praised by consumers. Experimental data show that after using anti-yellowing agent, the yellowing index of the material decreased by more than 80%.
| parameter name | Raw Materials | Add anti-yellowing agent |
|---|---|---|
| Yellow Index | 6.5 | 1.2 |
| Service life | 6 months | 24 months |
Case 2: Food plastic wrap
For food packaging, safety is the primary consideration, and anti-yellowing performance directly affects consumers' purchasing decisions. Some transparent food plastic wraps will turn yellow due to ultraviolet rays during storage, which not only affects the beauty, but may also make people mistakenly think that the food has deteriorated.
A leading domestic food packaging manufacturer has successfully solved this problem by introducing polyurethane TPE anti-yellowing agent. They developed a new type of plastic wrap that can remain crystal clear even if stored in strong light for three consecutive months. This innovative product quickly occupied the market and won several industry awards.
| parameter name | Raw Materials | Add anti-yellowing agent |
|---|---|---|
| Light transmittance | 85% | 97% |
| UV resistance | Low | High |
Case 3: Electronic device housing
The demand for packaging of modern electronic products is no longer limited to protection functions, but also needs to show a sense of technology and fashion. Polyurethane TPE materials have become an ideal choice for electronic equipment housings due to their excellent mechanical properties and plasticity. But likewise, the yellowing problem plagues this area.
KizhiNeng mobile phone manufacturers use polyurethane TPE material containing anti-yellowing agent in the protective case of their flagship models. After rigorous laboratory testing and user feedback, this protective case not only retains the original soft feel, but also maintains the initial color within two years, greatly improving the user experience.
| parameter name | Raw Materials | Add anti-yellowing agent |
|---|---|---|
| Aging resistance time | 12 months | 36 months |
| Surface gloss | 70% | 95% |
Technical parameters and performance characteristics of anti-yellowing agent
In order to better understand the principle and advantages of polyurethane TPE anti-yellowing agent, we can compare the key technical parameters of different types of anti-yellowing agents through the following table.
| Anti-yellowing agent type | Main Ingredients | Add ratio (wt%) | Scope of application | Features |
|---|---|---|---|---|
| UV Absorbent | Benzotriazole | 0.1-0.5 | Outdoor packaging materials | Strong ability to absorb ultraviolet rays and good stability |
| Antioxidants | Stealed Phenol | 0.2-0.8 | Food Grade Packaging Materials | High efficiency in capturing free radicals, safe and environmentally friendly |
| Light Stabilizer | Stealed amine | 0.3-1.0 | Cosmetic Packaging Materials | Providing long-term weather resistance, high cost |
| Compound anti-yellowing agent | Mix | 0.5-1.5 | Comprehensive Use Packaging Materials | Comprehensive functions and high cost performance |
From the table above, it can be seen that different types of anti-yellowing agents have their own emphasis, and users can flexibly choose according to their specific needs.
The current situation and development trends of domestic and foreign research
CountryInternational research progress
In recent years, European and American countries have achieved remarkable results in the research of polyurethane TPE anti-yellowing agents. For example, Germany's BASF has developed a new composite anti-yellowing agent that can provide up to five years of protection in extreme environments. In addition, the nano-scale ultraviolet absorber launched by DuPont in the United States further improves the light stability of the material.
Domestic Development
In China, the Department of Chemical Engineering of Tsinghua University and the Chinese Academy of Sciences jointly carried out a series of basic research on polyurethane TPE anti-yellowing agents. They found that by optimizing the molecular structure design, the dispersion uniformity of the anti-yellowing agent can be greatly improved, thereby enhancing its practical application effect. At the same time, some local companies have also begun to pay attention to independent research and development, gradually narrowing the gap with the international leading level.
Future development direction
Looking forward, the development of polyurethane TPE anti-yellowing agents will show the following trends:
- Green and Environmental Protection: With the global emphasis on sustainable development, more anti-yellowing agents based on renewable resources will be developed.
- Multifunctionalization: Future anti-yellowing agents are not limited to a single function, but will also integrate antibacterial and anti-mold properties.
- Intelligent: Use intelligent responsive material technology to achieve the effect of automatic adjustment of anti-yellowing agents according to environmental conditions.
Conclusion
Polyurethane TPE anti-yellowing agent, as an important part of high-end packaging materials, is constantly promoting the development of the industry. It not only solves the yellowing problem of traditional materials, but also provides designers with greater creative space. As the old saying goes, "Details determine success or failure." Only by paying attention to every small link can we create a truly touching product.
Let us look forward to the near future, polyurethane TPE anti-yellowing agent can bring more surprises and add more color to our lives!
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