The overmolding process involves molding one plastic material over another. This ensures a seamless combination of multiple plastic parts to give a uniform and durable product. Insert Molding and multi-shot molding processes help combine materials for functional and aesthetic purposes. RapidDirect`s plastic injection overmolding uses these processes to ensure every component meets industrial standards.
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Fibers, which are processed by chemical or physical methods using natural or synthetic polymer compounds as raw materials, are collectively referred to as chemical fibers. Chemical fiber is divided into two categories, which are called synthetic fibers made from natural polymer materials such as soybeans and wood. Synthetic fibers are made from petrochemical and coal chemical byproducts. Because chemical fiber has good physical and chemical properties, chemical fiber textiles and clothing are not only popular among people, but also widely used in industry and other fields. China's chemical fiber production is dominated by synthetic fibers, which accounts for 92% of the total chemical fiber production. Manmade fibers only account for 10% of the national chemical fiber production capacity. At present, raw materials for synthetic fiber production in China are mainly derived from petrochemicals, and coal chemical byproducts are rarely used as raw materials for synthetic fibers.
It is generally believed that the end product of petrochemicals, terephthalic acid (PTA), is the demarcation point between the petrochemical industry and the chemical fiber industry and is the main raw material for the production of polyethylene terephthalate (PET). Due to different production and processing methods, its products are divided into two types: polyester chips and polyester fibers. The slices are divided into bottle-level slices, membrane-level slices and fiber slices. The fiber slices are melted and spun into fibers, bottle grade and membrane grade. Slices are generally no longer used for fiber production. More than 75% of China's polyester is used to produce polyester fiber, commonly known as polyester, and polyester accounts for 85% of the total synthetic fiber. It is the main raw material for the textile industry. Polyester is divided into two types of filaments and staple fibers: 62% are filaments and 32% are staple fibers. Among them, filaments are used for chemical fiber fabrics, and staple fibers are blended with cotton or linen to make blended yarns.
In addition to the most important polyester, synthetic fibers, commonly used chemical fiber, nylon, acrylic, vinylon, spandex, polypropylene, etc., almost all of the points of the filament and staple fiber, due to their different physical and chemical properties, are widely used Civil and industrial, agricultural, fishery, packaging, medical and health and other different areas. Artificial fibers include viscose fibers, acetate fibers, cuprammonium fibers, diacetate fiber tow, and man-made fiber monofilaments. The main textile fiber is viscose fiber, followed by acetate fiber. Other man-made fibers are basically not used in the textile and apparel industry. Viscose fiber is the main raw material for producing rayon, rayon and artificial wool. Acetate fiber has excellent properties, its properties are very similar to silk, but the production technology in China is still blank.
China's chemical fiber industry develops rapidly, and the average investment increases at an annual rate of about 40%. Since 2003, investment growth has slowed down under the state's macroeconomic control. Production capacity has gradually concentrated on large companies, private enterprises, and markets, and attention has been paid to differential fiber. Research and production, establish differentiated competitive advantages, further increase labor productivity, save energy, reduce pollution, and gradually shift from quantity-based to technology-based in industrial restructuring. There are currently three major macro factors that affect the development of the chemical fiber industry. Resources and the environment, appreciation of the renminbi, imports of synthetic raw materials, and corresponding imports of fiber and upstream raw material tariffs are upside down.
China's chemical fiber industry production brief introduction and future development analysis
China's chemical fiber production began at the end of the 1950s and has grown into an important industrial sector during the nearly 50 years of development. It is an important component of China's textile and clothing industry. At present, China's annual output of chemical fiber is about 16 million tons, accounting for more than 45% of the world's total output of chemical fiber.