Production of acupuncture carpets, geotextiles, warm flakes, paper blankets, air filter materials, the main raw material is what? why?
Fiber, like eating bread must be the same with the face
The main raw material is polyester, polyester is the basic composition of polyethylene terephthalate, it is also known as polyester fiber (PET), the long chain of its chemical formula H (OCH2CCOCO) NOCH2CH2OH, the relative molecular weight is generally ~ The In fact, there are a small amount of monomer and oligomers present. These oligomers have a low degree of polymerization and are present in an annular form. Polyethylene terephthalate can be obtained by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG) by direct esterification of ethylene terephthalate 9BHET. From the composition of polyester molecules, it is composed of short fatty hydrocarbon chain, ester, benzene ring, terminal alcohol hydroxyl group. Polyester molecules in addition to the existence of two hydroxyl groups, there is no other polar groups, and thus polyester fiber hydrophilic poor. Polyester molecules contain about 46% of the ester group, ester groups can be hydrolyzed at high temperatures, thermal cracking, the case of alkali is the saponification, the degree of polymerization reduced; polyester molecules also contain aliphatic hydrocarbon chain, it can make polyester molecules have a certain But because the polyester molecules can not rotate the benzene ring, so the polyester macromolecules are basically rigid molecules, molecular chains easy to maintain linear. Therefore, polyester macromolecules in this condition is easy to form crystals, so the polyester crystallinity and orientation is higher.
