How to improve the long-term weather resistance of transparent PET？

What is PET material?

Polyethylene glycol terephthalate (PET), its chemical formula is (C10H8O4)n.

PET is widely used in electronic and electrical appliances, automotive parts, medical devices, packaging materials and other fields due to its high transparency and excellent dimensional stability.

What’s the application of transparent PET?

Packaging industry:

Transparent PET sheet is an important material for the packaging of food, beverages and pharmaceuticals. Its high transparency and excellent physical properties make it one of the ideal packaging materials.

Automotive industry:

PC/PET alloy has a wide range of applications in automotive interior and exterior accessories, instrument panels, reflectors, lamp bases and hood components. In addition, PET film is also an important material for the car coat film, compared with PVC film, PET film is more durable and has better mechanical property.

Construction industry:

Transparent PET sheet can be used for skylights, walls, doors and windows in construction. Its weather resistance, impact resistance and transparency make it an ideal choice for building materials.

Electronic industry:

Transparent PET sheets are widely used in electronic displays, touch screens, fiber optic communications and other fields. Its light weight, flexibility and high temperature resistance give it a competitive advantage in electronics manufacturing.

How to improve the long-term weather resistance of transparent PET？

The above applications set increasingly high standards for PET materials, not only requiring good transparency and scratch resistance, but the resin must also have excellent resistance to UV aging and anti-yellowing properties.

However, unmodified PET materials will accelerate yellowing, degradation and even become brittle if exposed to the sun for a long period of time, and PET will occur the chain reaction of photo-oxidative aging, which leads to the material physical and mechanical properties to reduce, its transparency, aesthetics are also decreased significantly.

OMNISTAB STRONG ADDITIVES FOR TRANSPARENT PET:

UV1577 has light color, low volatility, excellent heat resistance and excellent compatibility with polyester transparent material.

UV1164 has stable performance and broad absorption in the UVA band, giving the polymer comprehensive UV protection.

UV3638 has good light transmittance and light color, which has less effect on the color and transparency of polymers, especially suitable for products with high requirements for transparency, such as PET bottles, films and sheets.

UV3030 has high thermal stability, no color stains. Therefore, it is particularly suitable for transparent polymers processed under high temperature conditions.

LS4050H is especially suitable for polyester materials, and can be combined with hindered phenolic antioxidants to significantly improve the weathering and color fastness of the material.

LS119 is a kind of large molecular HALS, it’s suitable for all fields requiring low volatility and high migration resistance.

AN3114 has excellent heat resistance and can improve the light and heat stability of PET products.

AN9128 is the upgraded version of AN626, with lower volatility and better heat resistance. The yellowing resistance of the product will be significantly improved when used together with the hindered phenolic antioxidant.