Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Airbag Dock Leveler with good price, computer and recording tapes, and electrical insulation.Good quanlity Hydraulic Dock Leveler. It does not absorb moisture, but does absorb oil;Induction Loop Controller for High speed door-, soil-, and fire-Zipper and guide for High Speed Door. Its low absorbency also makes it naturally resistant to stains.High Speed Spiral Door,Industrial High Speed Roller Shutter Hard Panel Door.Industrial door, and not damaged by mildew.H-6000 High Speed Spiral Door, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hard Door-based E.I. du Pont de Nemours and Co.Stacking Door. This early research, headed by W.H. Carothers,Fabric Door, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,High speed Stack Door. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.High Speed Door,RUBBER Low Cut Labor Insurance Shoes. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.PU And RUBBER Low Cut Labor Insurance Shoes, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PU And RUBBER High Cut Labor Insurance Shoes.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Split Embossed Leather Labor Insurance Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU Mid Cut Labor Insurance Shoes.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Embossed Leather Labor Insurance Shoes. The four basic forms are filament,PU Low Cut Labor Insurance Shoes, tow, and fiberfill. In the filament form,PU Low Cut Suede Leather Army Shoes, producing smooth-RUBBER High Cut Army Shoes.PU And RUBBER Army Shoes, filaments are cut to short,PU Mid Cut Army Safety Shoes.RUBBER Mid Cut Army Shoes. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Army Shoes.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-KPU Low Cut Safety Shoes,PU Low Cut Suede Leather Safety Shoes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Antistatic protective Safety Shoes. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.PU And RUBBER Leather Low Cut Safety Shoes, which are usually round,PU Low Cut Split Embossed Leather Safety Shoes. The number of holes in the spinneret determines the size of the yarn,Leather Surface PU Safety Shoes.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Textile Surface PU bottom Safety Shoes. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,PU Safety Shoes.
• PU Low Cut Safety Shoes,Textile Surface PU Bottom Safety Shoes. Also,PU Textile Safety Shoes,Waterproof PU Low Cut Safety Shoes.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Split Embossed Leather Sandal Safety Shoes

Low Cut Microfiber Safety Shoes, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,Microfiber PU Low Cut Safety Shoes. The rope-Split Embossed Leather PU Boots Safety Shoes.

Drawing tow

• 1 Newly-PU High Cut Safety Shoes.PU Mid Cut Hiking Safety Shoes.

Crimping

• 2 Drawn tow is then fed into compression boxes,Hiking Safety Shoes, at a rate of 9-15 crimps per inch (3-6 per cm).Leather PVC Bottom Safety Shoes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PU And RUBBER Low Cut Safety Shoes.Embossed Leather Safety Shoes.

Cutting

• 4 Following heat setting,Low Cut Textile Surface Safety Shoes. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)PU Low Cut Textile Safety Shoes.Shockproof And Wearable Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)RUBBER Low Cut Textile Surface Safety Shoes.

The Future

Leather PU Bottom Safety Shoes,Waterproof Leather Safety Shoes's fastest-growing fiber.Suede Leather Safety Shoes. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,Split Embossed Leather Safety Shoes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,RUBBER Low Cut Safety Shoes. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Offset Print  Low Cut Safety Shoes, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.