Polyester

Background

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

History

In 1926,Fabric Door-based E.I. du Pont de Nemours and Co.High speed Stack Door. This early research, headed by W.H. Carothers,High Speed 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,RUBBER Low Cut Labor Insurance Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PU And RUBBER Low Cut Labor Insurance Shoes,PU And RUBBER High 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.Split Embossed Leather 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 Mid 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,Embossed Leather Labor Insurance Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU Low Cut Labor Insurance Shoes.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PU Low Cut Suede Leather Army Shoes. The four basic forms are filament,RUBBER High Cut Army Shoes, tow, and fiberfill. In the filament form,PU And RUBBER Army Shoes, producing smooth-PU Mid Cut Army Safety Shoes.RUBBER Mid Cut Army Shoes, filaments are cut to short,Army Shoes.KPU Low Cut Safety 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.PU Low Cut Suede Leather Safety 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-Antistatic protective Safety Shoes,PU And RUBBER Leather Low Cut Safety Shoes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,PU Low Cut Split Embossed Leather 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.Leather Surface PU Safety Shoes, which are usually round,Textile Surface PU bottom Safety Shoes. The number of holes in the spinneret determines the size of the yarn,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,PU Low Cut 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,Textile Surface PU Bottom Safety Shoes.
• PU Textile Safety Shoes,Waterproof PU Low Cut Safety Shoes. Also,Split Embossed Leather Sandal Safety Shoes,Low Cut Microfiber 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.

Microfiber PU Low Cut Safety Shoes

Split Embossed Leather PU Boots 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,PU High Cut Safety Shoes. The rope-PU Mid Cut Hiking Safety Shoes.

Drawing tow

• 1 Newly-Hiking Safety Shoes.Leather PVC Bottom Safety Shoes.

Crimping

• 2 Drawn tow is then fed into compression boxes,PU And RUBBER Low Cut Safety Shoes, at a rate of 9-15 crimps per inch (3-6 per cm).Embossed Leather Safety Shoes.

Setting

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

Cutting

• 4 Following heat setting,Shockproof And Wearable 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)RUBBER Low Cut Textile Surface Safety Shoes.Leather PU Bottom Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Waterproof Leather Safety Shoes.

The Future

Suede Leather Safety Shoes,Split Embossed Leather Safety Shoes's fastest-growing fiber.RUBBER Low Cut 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,Offset Print  Low Cut Safety Shoes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PVC Mid Cut Safety Shoes. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.KF12 Tungsten Steel Round Bar, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.