Following on from jiuyu and you share the damaging effects of ultraviolet on polymer, as follows:

Too Sun is a electromagnetic waves, in its through space and ozone Shi, 290nm following and 3000nm above of Ray almost are was filter except, actual arrived ground of for 290nm~3000nm of electromagnetic waves, which wavelength range for 400~800nm (about accounted for 40%) of is visible, wavelength about for 800~3000nm (about accounted for 55%) of is infra-red, and wavelength about for 290~400nm (only accounted for 5%) of is UV.

Ultraviolet light from the Sun is a major cause of aging effect on polymer materials. Ultraviolet radiation accounts for just about 5% of the Sun, but the energy is great. Polymer products after absorbing ultraviolet light, enough to cause self-oxidation and degradation of polymers, damage the polymer's chemical bonds, make it break, crosslinked, resulting in polymer products color, appearance, and physical and mechanical properties of malignant transformation, reduced strength, shortened life expectancy. This process is called oxidation and reduction of light or optical effects of aging.

UV rays can also penetrate the skin surface, damaged skin cells gradually hardens and loss of elasticity of the skin, wrinkles and accelerated aging.

Long Yu, Zhangjiagang chemical company in the production process, the adoption of strict management mode, from raw materials, formulation, process control and other layers of checks, ensure quality of product quality, particularly on the crystallization of the product, the use of advanced equipment and process control of crystallization, and appearance of the product meets the requirements of a yellowish needle Crystal, and quality by customers at home and abroad alike.

This article is from: UV absorber, UV-531, antioxidant, jiuyu http://www.zjgjyhg.com/