Polyester, Glass Fiber, Chemical Fibers, etc.
Polyester is a major variety of synthetic fiber and serves as the commercial name for polyester fiber in my country. It is a fiber-forming polymer-specifically polyethylene terephthalate (PET)-produced through esterification (or transesterification) and polycondensation reactions, using purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials.
Glass fiber is an inorganic, non-metallic material possessing excellent properties and constitutes a key component of glass fiber fabrics. Its English designation is "glass fiber." Its composition typically includes silicon dioxide, aluminum oxide, calcium oxide, boron oxide, magnesium oxide, sodium oxide, and other compounds. It is manufactured using glass beads or recycled glass as raw materials, processed through a series of steps including high-temperature melting, drawing, winding, and weaving. The final output comprises a diverse range of products; the diameter of a single glass fiber filament typically ranges from a few microns to over twenty microns-equivalent to approximately 1/20 to 1/5 the thickness of a human hair. Each bundle of raw fiber strands consists of hundreds or even thousands of individual filaments. Glass fiber is commonly utilized as a reinforcing material in composites, as electrical insulation, as thermal insulation, and in circuit board substrates, finding widespread application across various sectors of the national economy.
Chemical fibers are fibers manufactured using natural or synthetically produced polymeric substances as raw materials. Based on the origin of these raw materials, chemical fibers can be broadly classified into two categories: "regenerated fibers" (or artificial fibers), which are derived from natural polymeric substances, and "synthetic fibers," which are derived from synthetic polymeric substances.
