What Is Filament Winding?

Polyester filament is made of polyester filament yarn. Polyester is an important variety in synthetic fibers and is the trade name of polyester fibers in China. It is a fiber-forming polymer made from refined terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG) through esterification or transesterification and polycondensation. Polyethylene terephthalate (PET), fiber made by spinning and post-treatment. The so-called polyester filament is a filament with a length of more than kilometers, and the filament is wound into a ball.

Polyester filament

Polyester filament is used

Divided by production method

1. Primary yarn: undrawn yarn (conventional spinning) (UDY), semi-prefetched

Polyester has a wide range of uses, and is widely used in the manufacture of clothing and industrial products. Flame retardant polyester has a wide range of applications due to its flame retardance, except for industrial use

Characteristics of polyester filament

Strength: The strength of polyester fiber is nearly 1 times higher than cotton and 3 times higher than wool, so polyester fabric is strong and durable.

Heat resistance: Can be used at -70 ° C to 170 ° C, which is the best heat resistance and thermal stability of synthetic fibers.

Elasticity: The elasticity of polyester is close to that of wool, and the crease resistance is better than other fibers.

Abrasion resistance: The abrasion resistance of polyester is second only to nylon, ranking second in synthetic fibers.

Water absorption: Polyester has low moisture absorption and good insulation properties, but because of low water absorption, high static electricity generated by friction, and poor natural adsorption of dyes, polyester is generally dyed using high temperature and high pressure dyeing.

Dyeability: Polyester itself lacks hydrophilic groups or dye acceptor parts, so polyester has poor dyeability. It can be dyed with disperse dyes or non-ionic dyes, but the dyeing conditions are relatively harsh.

Uses of polyester filament

Polyester is used as clothing fiber, and its fabric can achieve the effect of no wrinkle and no ironing 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 and decorative materials. Polyester can be used in conveyor belts, tents, canvases, cables, fishing nets, etc., especially polyester cords for tires, which are close to nylon in performance. Polyester can also be used in electrical insulation materials, acid-resistant filter cloths, and medical industry cloths. Synthetic fibers are widely used in various fields of the national economy due to their high strength, abrasion 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 fibers are divided into natural fibers and chemical fibers. Natural fibers are mainly silk, wool, cotton, and hemp. Chemical fibers are divided into synthetic fibers and artificial fibers.

Comparing polyester filament and acetate filament again, because they are equal, they are categorized from the back. Polyester is a synthetic acetate and is artificial.

Polyester filament and staple fiber

Polyester (polyethylene terephthalate, PET) is made by polymerizing PTA and MEG. PET is grainy and diverse. 75% is used for polyester for chemical fiber, manufacturing polyester staple. According to the requirements of the textile industry, manufacture polyester staple fiber and polyester filament.

There are two types of polyester fiber: filament and short fiber. The so-called polyester filament is a filament with a length of more than kilometers, and the filament is wound into a ball. Polyester staple fibers are staple fibers ranging from a few centimeters to a dozen centimeters.

Characteristics and uses of polyester fiber

Strength : The strength of polyester fiber is nearly 1 times higher than cotton and 3 times higher than wool, so polyester fabric is strong and durable.

Heat resistance : Can be used at -70 ° C to 170 ° C, which is the best heat resistance and thermal stability of synthetic fibers.

Elasticity : The elasticity of polyester is close to that of wool, and the crease resistance is better than other fibers.

Abrasion resistance : The abrasion resistance of polyester is second only to nylon, ranking second in synthetic fibers.

Water absorption : Polyester has low moisture absorption and good insulation properties, but due to low water absorption, the static electricity generated by friction is large, and the dyeing performance is poor.

Polyester is used as clothing fiber, and its fabric can achieve the effect of no wrinkle and no ironing 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 and decorative materials. Polyester can be used in conveyor belts, tents, canvas, cables, fishing nets, etc., especially polyester cords for tires, which are close to nylon in performance. Polyester can also be used in electrical insulation materials, acid-resistant filter cloths, and medical industry cloths. Synthetic fibers are widely used in various fields of the national economy due to their high strength, abrasion resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth, good electrical insulation, and no fear of mildew.