Hey there! As a supplier of PE laminated non woven fabric, I've been getting a lot of questions lately about what additives can be used to boost the anti - aging property of this fabric. So, I thought I'd write this blog to share some insights.
First off, let's understand why anti - aging is such a big deal for PE laminated non woven fabric. This fabric is used in a wide range of applications, from medical supplies to construction materials. In these scenarios, it's exposed to various environmental factors like sunlight, heat, and moisture over time. Without proper anti - aging measures, the fabric can degrade, lose its strength, and become less effective.
UV Absorbers
One of the most common additives used to enhance anti - aging is UV absorbers. Sunlight, especially the ultraviolet (UV) rays, can cause significant damage to PE laminated non woven fabric. UV rays break down the polymer chains in the PE film and the non - woven substrate, leading to embrittlement, discoloration, and a decrease in mechanical properties.
UV absorbers work by absorbing the UV radiation and converting it into heat, which is then dissipated. There are different types of UV absorbers available, such as benzotriazoles and benzophenones. Benzotriazoles are known for their excellent UV absorption in the 280 - 400 nm range, which is where most of the harmful UV - B and UV - A rays are located. They can provide long - term protection to the fabric, especially when used in outdoor applications.
For instance, if you're using PE Laminated Spunlace for Medical, a small amount of UV absorber can help maintain the integrity of the fabric even if it's stored in a place with some exposure to sunlight. This ensures that the fabric remains sterile and functional for a longer period.
Antioxidants
Antioxidants are another crucial additive for anti - aging. Oxidation is a chemical reaction that occurs when the fabric is exposed to oxygen, heat, or certain chemicals. It can lead to the formation of free radicals, which damage the polymer chains in the fabric.
There are two main types of antioxidants: primary and secondary antioxidants. Primary antioxidants, like hindered phenols, work by donating a hydrogen atom to the free radicals, thus stabilizing them. Secondary antioxidants, such as phosphites and thioesters, decompose the hydroperoxides formed during the oxidation process.
When used together, primary and secondary antioxidants can provide synergistic protection. For example, in PE Film Laminated PP, antioxidants can prevent the yellowing and loss of strength that often occur due to oxidation. This is particularly important for products that are stored for a long time or used in high - temperature environments.
Light Stabilizers
Light stabilizers, also known as hindered amine light stabilizers (HALS), are highly effective in protecting PE laminated non woven fabric from photo - oxidation. Unlike UV absorbers, which mainly absorb UV radiation, HALS work by scavenging the free radicals formed during the photo - oxidation process.
HALS can regenerate themselves after reacting with free radicals, which means they can provide long - term protection. They are especially useful in outdoor applications where the fabric is exposed to continuous sunlight. For example, Coated Non Woven Fabric For Construction often needs to withstand years of exposure to the elements. Adding HALS to the fabric can significantly extend its lifespan and maintain its performance.
Heat Stabilizers
Heat can also cause aging in PE laminated non woven fabric. High temperatures can accelerate the oxidation process and lead to thermal degradation of the polymer. Heat stabilizers are used to prevent or slow down this degradation.
There are different types of heat stabilizers, such as metal - based stabilizers and organic stabilizers. Metal - based stabilizers, like calcium - zinc stabilizers, can absorb the acidic by - products formed during thermal degradation and prevent further damage to the polymer chains. Organic stabilizers, on the other hand, can react with the free radicals formed due to heat and stabilize the polymer.
When using PE laminated non woven fabric in applications where it may be exposed to high temperatures, such as in some industrial processes, adding heat stabilizers can ensure that the fabric retains its mechanical properties and dimensional stability.
The Right Combination
It's important to note that using a single additive may not be enough to provide optimal anti - aging protection. In most cases, a combination of different additives is required. For example, using a UV absorber along with an antioxidant and a light stabilizer can provide comprehensive protection against UV radiation, oxidation, and photo - oxidation.
The dosage of these additives also needs to be carefully controlled. Too little may not provide sufficient protection, while too much can affect the physical and chemical properties of the fabric. As a supplier, we have extensive experience in formulating the right combination of additives for different applications.
Conclusion
In conclusion, enhancing the anti - aging property of PE laminated non woven fabric is crucial for its long - term performance and durability. UV absorbers, antioxidants, light stabilizers, and heat stabilizers are all important additives that can be used to achieve this goal. By using the right combination of these additives, we can ensure that the fabric meets the requirements of various applications, whether it's in the medical field, construction, or other industries.
If you're interested in purchasing high - quality PE laminated non woven fabric with enhanced anti - aging properties, feel free to reach out for a detailed discussion. We can provide customized solutions based on your specific needs.
References
- "Plastics Additives Handbook" by Hans Zweifel
- "Polymer Degradation and Stabilization" by George Scott