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The yarn quality of the polyester yarn is not more stable than the rayon, but is more elastic. You can cut a piece of rayon for testing, pull it hard, then relax and find that the embroidery thread does not shrink. On the contrary, once pulled, the polyester yarn will return to its original length, which sometimes causes the flower to wrinkle. Online tension adjustment needs to be more accurate. 
Polyester filament is made of polyester. Polyester is an important variety in synthetic fiber and is the trade name of polyester fiber in China. It is a fiber-forming polymer prepared by esterification or transesterification and polycondensation of terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG). - Polyethylene terephthalate (PET), fibers made by spinning and post-treatment. The so-called polyester filament is a filament having a length of more than a kilometer, and the filament is wound into a mass.
Classification by production method
1. Primary silk: undrawn yarn (conventional spinning) (UDY), semi-pre-oriented yarn (medium speed spinning) (MOY), pre-oriented yarn (high speed spinning) (POY), high-oriented yarn (ultra-high speed) Spinning) (HOY).
2. Stretched yarn: drawn yarn (low speed drawn yarn) (DY), fully drawn yarn (spinning one step method) (FDY), full yarn (spinning one step method) (FOY).
3. Deformed silk: conventional textured yarn (TY), tensile textured yarn (DTY), air textured yarn (ATY).
Mainly divided into civilian and industrial use by purpose.
Features The characteristics of polyester filaments: The strength of polyester fiber is nearly 1 times higher than that of cotton and 3 times higher than that of wool. Therefore, polyester fabric is durable.
Heat resistance: It can be used at -70 ° C to 170 ° C, which is the best in heat resistance and thermal stability of synthetic fibers.
Elasticity: The elasticity of polyester is close to wool, the wrinkle resistance is higher than other fibers, the fabric is not wrinkled, and the shape retention is good.
Abrasion resistance: Polyester's wear resistance is second only to nylon, ranking second in synthetic fiber.
Water absorption: Polyester has low moisture absorption rate and good insulation performance. However, due to low water absorption, the static electricity generated by friction is large, and the natural adsorption performance of dyes is poor. Therefore, polyester is generally dyed by high temperature and high pressure dyeing.
Dyeability: Polyester itself lacks hydrophilic groups or dye acceptor parts, so polyester has poor dyeability and can be dyed with disperse dyes or nonionic dyes, but the dyeing conditions are harsh.
The use of polyester filaments As a fabric fiber, the fabric has a wrinkle-free and non-ironing effect after washing. Polyester is often blended or interwoven with various fibers, such as cotton polyester, wool polyester, etc., and is widely used in various clothing materials and decorative materials. Polyester is industrially used for conveyor belts, tents, canvas, cables, fishing nets, etc., especially for polyester cords for tires, which are close to nylon in performance. Polyester can also be used for electrical insulation materials, acid-resistant filter cloths, and pharmaceutical industry fabrics. Synthetic fiber has been widely used in various fields of the national economy because of its high strength, wear resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth, good electrical insulation and no fear of mildew.
Polyester filament and chemical staple fiber textile fiber are divided into natural fiber and chemical fiber. Natural fiber is mainly composed of silk, wool, cotton and hemp. Chemical fiber is divided into synthetic fiber and man-made fiber.
Comparing polyester filaments and acetate filaments, because they are equal, they are classified later, and polyester is a synthetic acetic acid.
Polyester filament and staple polyester (polyethylene terephthalate, PET) are polymerized from PTA and MEG. PET is rice-grained and diverse. 75% is used for polyester for chemical fiber, and polyester is produced in accordance with the requirements of the textile industry to produce polyester staple fiber and polyester filament.
Polyester fiber is divided into two types: filament and staple fiber. The so-called polyester filament is a filament having a length of more than a kilometer, and the filament is wound into a mass. Polyester staple fibers are staple fibers of a few centimeters to a dozen centimeters.
Characteristics and strength of polyester fiber: The strength of polyester fiber is nearly 1 times higher than that of cotton and 3 times higher than that of wool. Therefore, polyester fabric is durable and durable.
Heat resistance: It can be used at -70 ° C to 170 ° C, which is the best in heat resistance and thermal stability of synthetic fibers.
Elasticity: The elasticity of polyester is close to wool, the wrinkle resistance is higher than other fibers, the fabric is not wrinkled, and the maintenance is good.
Abrasion resistance: Polyester's wear resistance is second only to nylon, ranking second in synthetic fiber.
Water absorption: Polyester has low moisture absorption rate and good insulation performance, but due to low water absorption, the static electricity generated by friction is large and the dyeing performance is poor.
As a fiber for clothing, polyester has a wrinkle-free and non-ironing effect after washing. Polyester is often blended or interwoven with various fibers, such as cotton polyester, wool polyester, etc., and is widely used in various clothing materials and decorative materials. Polyester is industrially used for conveyor belts, tents, canvas, cables, fishing nets, etc., especially for polyester cords for tires, which are close to nylon in performance. Polyester can also be used for electrical insulation materials, acid-resistant filter cloths, and pharmaceutical industry fabrics. Synthetic fiber has been widely used in various fields of the national economy because of its high strength, wear resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth, good electrical insulation and no fear of mildew.
What is the use of polyester staple fiber?
Polyester is an important variety in synthetic fiber and is the trade name of polyester fiber in China. It is a fiber-forming polymer prepared by esterification or transesterification and polycondensation of purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG). - Polyethylene terephthalate (PET), fibers made by spinning and post-treatment.