Measure somePFA GranulesThere are many standards for transparency, such as light transmittance, haze, refractive index, birefringence and dispersion.

According to the light transmittance of the material, it can be divided into transparent material (wavelength 400nm ~ 800nm) visible light transmittance of more than 80%, translucent material (400nm ~ 800nm visible light transmittance

Between 50% and 80%), opaque materials (the refractive index of visible light from 400nm to 800nm is below 50%). According to the above classification, resins can be divided into transparent resins, mainly including PMMA, PC, PS, PET

, SAN, BS (also known as K resin), etc.; Translucent resin, such as PP, PA; Opaque resin, such as ABS, POM, PTFE, PF, etc.

To improve the transparency of PFA particles, we can start from reducing the crystallinity, controlling the clean quality, increasing the refractive index and reducing the birefringence. Specific methods are as follows:

1. Use additives to improve the transparency of PFA particles, such as adding nucleating agents, which is the most effective way to increase the light transmittance of transparent resins, which can promote the crystallization of small molecules. It can rise in resin

To the role of the crystal nucleus.

2. Blending to improve the transparency of PFA particles is to add other resins to the transparent resin to improve transparency.

3. Biaxial stretching improves the transparency of PFA particles, which can break the original crystalline particles in the product to reduce the crystal size and achieve the purpose of improving light transmittance.

This article comes from:www.tflpfa.com