My country is the world's largest producer of polyester and textiles and apparel, and staple fiber is an important polyester product. As the third type of polyester industry chain listed after PTA and MEG, staple fiber futures will provide relevant industrial enterprises with fair price signals and effective risk management methods, which will help promote the stable operation of relevant enterprises and promote staple fiber futures. The industry develops steadily and healthily.
In order to facilitate investors to have a more in-depth understanding of polyester staple fiber futures, the Everbright Futures Energy and Chemical Group will introduce a series of polyester staple fiber spot and futures. This article will introduce the first part: the basic knowledge of polyester staple fiber.
Brief introduction of polyester staple fiber
Polyester staple fiber, English name Polyester staple fiber, referred to as PSF, is a fiber obtained by spinning polyester (ie, polyethylene terephthalate, referred to as PTA, polymerized by PTA and MEG) into tow and cutting it. . The products are mainly used in the cotton spinning industry, spun alone or blended with cotton, viscose, hemp, wool, vinylon, etc. The resulting yarns are mainly used in textiles and garments, and can also be used in non-woven fabrics, fillers and thermal insulation materials and other industries .
The main specifications of polyester staple fiber include semi-matte white 1.56dtex*38mm (the benchmark specification, which is the delivery target of listed futures varieties), accounting for 49% of the primary staple fiber; semi-gloss 1.33 dtex *38mm; glossy 1.33 dtex *38mm; 1.56 dtex *38mm special specifications for spunlace; 2.22/2.78 dtex *51mm medium and long fibers, etc.
In the above, dtex (dite) is an international unit of fiber titer, which represents the weight of 10,000 meters of fiber in grams. The greater the number of grams, the thicker the yarn or fiber. At the same time, D (denier) is also a method of expressing the fineness of a chemical fiber, which refers to the weight in grams of a 9,000-meter-long fiber, also known as denier. Usually represented by D, the larger the D, the thicker the fiber. Such as 1.4D, 1.2D, 2D, 6D, etc. The conversion method of the two is decitex (dtex)=1.11*denier (D), such as 1.56dtex=1.4D, 1.33dtex=1.2D, 2.22dtex=2D.
Polyester staple fibers are mainly used in three major fields: textile yarns, accounting for 77%, and end products are clothing, home textiles, decorative fabrics, etc.; non-woven fabrics, accounting for 17%, end products are wipes, masks, etc.; filling used, accounting for 6%, and the end products are winter clothes, quilts, toys, etc.
Polyester staple fiber industry chain structure
Polyester staple fiber is one of polyester products. Polyester products mainly include polyester filament, polyester staple fiber, polyester bottle flakes, polyester industrial yarn, polyester film and so on. Among them, polyester filament accounts for the largest proportion, which is above 50%. Based on the polyester production capacity in August 2020 (63.27 million tons) as a base (Longzhong Information caliber), polyester staple fiber accounts for 13% of the entire polyester production capacity. nearby.
Polyester staple fiber is one of the intermediate products to undertake the petrochemical industry and the textile industry. It extends upstream from its raw material PTA and can be traced back to crude oil, naphtha, MX, PX, and its industrial chain is relatively simple; and another raw material of staple fiber. The preparation process routes of MEG are more diverse, including the integrated process route of naphtha, the process route of methanol to olefins MTO and the process route of coal (syngas) production. In terms of raw material consumption ratio, 1 times of polyester staple fiber needs to consume 0.855 times of PTA and 0.335 times of MEG, and the processing cost during the period is around 900 yuan / ton.
Polyester staple fiber product classification
There are three main classification methods of polyester staple fiber:
1. According to the process classification, it can be divided into melt direct spinning (the product is primary staple fiber) and indirect spinning, of which indirect spinning can be subdivided into chip spinning (the product is primary staple fiber) and regenerated spinning (also called return spinning). ). The process flow of melt direct spinning is to generate melt through polycondensation reaction of PTA and MEG, directly extrude and spin, and then pass through post-processing (bundling, stretching, heat setting, crimping, drying, cutting, packaging, etc.) to obtain fibers. ; Chip spinning is to re-melt fiber-grade PET chips, and then post-process them to make short fibers; the raw material of regeneration spinning is recycled PET bottles (such as common discarded mineral water bottles), and the recycled PET bottles will be separated. Fibers obtained by picking, washing, and then re-integrating and post-processing procedures. In 2019, the actual output of direct-spun polyester staple fiber was 6.25 million tons, of which conventional direct-spun polyester staple fiber accounted for 47%, the largest product.
2. According to the use, it can be divided into spinning, non-woven, thread making and filling. Among them, spinning is the most important downstream field of polyester staple fiber. Usually, it is spun with semi-gloss white 1.56dtex*38mm, 1.33dtex*38mm and other specifications to make pure polyester yarn, or blended with cotton, viscose staple fiber, etc. It is made of polyester-cotton yarn, polyester-viscose yarn, etc., and then woven; the non-woven fabric is mainly made of 1.56dtex*38mm spunlace special specification staple fiber, which usually has good hydrophilicity; in terms of thread making, mainly glossy or semi-glossy 1.33*38mm sewing thread special specifications to make strands; in terms of filling, 3D-15D hollow fibers, low melting point fibers, etc. are usually used to make products such as sprayed cotton, non-bonded cotton, pearl cotton, etc., which are used for home textile filling and clothing filling. field.
3. According to the fiber section classification, it can be divided into solid and hollow/special-shaped staple fibers. The conventional varieties are solid fibers; in order to enhance the thermal insulation properties of the fibers, special three-dimensional hollow, hollow fiber cross-section or special-shaped staple fiber products are prepared.
Polyester staple fiber supplier
Jiangyin Yongbang Chemical Fiber Co., Ltd. mainly produces various white and black regenerated short fibers, which are widely used in spinning, non-woven fabrics, home textiles and other fields. The polyester staple fiber produced is of high quality and low price, and is trustworthy, if you need it, please feel free to contact us at 16266316316 or send an email to jackbian@yongbangpsf.com, we will serve you wholeheartedly.
