Spunbond merupakan kata sifat. Polyester-Spunbond terbuat dari polimer yang dilelehkan, diekstrusi dan ditarik untuk menghasilkan filamen, membentuk jaring yang digulung dan terikat secara termal atau kimia ke dalam kain, daripada ditenun / dirajut.
Manufacturer made Spunbond in one continuous process. Firstly, they spun the fibers . Secondly, manufacturer directly dispersed it into a web by deflectors or directed it with air streams. In addition, this technique leads to faster belt speeds, and cheaper costs as well. Several variants of this concept are available, such as the REICOFIL machinery. PP spunbonds run faster and at lower temperatures than PET spunbonds, mostly due to the difference in melting points
Manufacturer combined Spunbond with melt-blown nonwovens, conforming them into a layered product called SMS (spun-melt-spun). Melt-blown nonwovens have extremely fine fiber diameters but are not strong fabrics. Manufacturer made SMS fabrics, completely from PP which are water-repellent and fine enough for disposable fabrics. They often used melt blown as filter media, because of its ability to capture very fine particles. Manufacturer bonded spunlaid either by resin or by thermal.
Polyester is a category of polymers that contain the ester functional group in their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). In addition, polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics such as polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not. Manufacturer used polyester extensively in clothing.
Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are also similar to polyethylene but it is slightly harder and more heat resistant. It is a white, mechanically rugged material and also has a high chemical resistance. Polypropylene is the second-most widely produced commodity plastic (after polyethylene) . In addition, manufacturer often used it for packaging and labeling. In 2019, the global market for polypropylene was worth $126.03 billion
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