The rubber sealant is a kind of sealing material which used rubber as main substrate, it is generally produced by mixing processes with additives such as softener, curing agent, reinforcing filler, antioxidant.

Polyolefin plastic, a polymer material prepared by polymerization or copolymerization of one or more type olefin.

Polypropylene fiber is kind of synthetic fiber spun from isotactic polypropylene, which is polymerized by propylene.

Thermoset plastics, which with thermosetting resin as the main component. It’s a kind of plastic that form products by cross-linking and curing with various necessary additives.

Hindered phenolic antioxidants are compounds that have substituents on one or both sides of the hydroxyl group of the benzene ring. According to the number of hindered phenolic functional groups in its molecule, it is generally divided into mono-hindered phenolic and polyhindered phenolic.

Polyurethane (PU) adhesives are those adhesive contains -NHCOO- and/or isocyanate group (-NCO-) in molecular chain. Polyurethane adhesives have many polar groups, which can form covalent and hydrogen bonds with materials contains active hydrogen.

Nylon, also called as Polyamide (PA), which means the general term for thermoplastic polyesters containing repeating amide groups -[-NHCO-]- in its molecular structure.

Among all polymers, polyolefin plastic has high cost-effective, good processing performance, which make it popular in the market. Even in harsh outdoor conditions, the weather-resistant PP material modified by additives can still maintain excellent yellowing resistance and anti-aging properties.

Most people believe that sunshine is good for health. However, a large number of skin pathological studies have shown that intense solar radiation, especially UVB&UVA (290 - 400 nm), poses a great harm to human health. It can cause skin tanning, pigmentation, skin-aging, and even skin cancer.