Polyester

Background

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

History

In 1926,High speed Stack Door-based E.I. du Pont de Nemours and Co.High Speed Door. This early research, headed by W.H. Carothers,RUBBER Low Cut Labor Insurance Shoes, 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,PU And 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 High Cut Labor Insurance Shoes,Split Embossed Leather 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 Mid 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.Embossed Leather 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,PU Low Cut Labor Insurance Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU Low Cut Suede Leather Army Shoes.

The Manufacturing
Process

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

Drying

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

PU High Cut 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 Mid Cut Hiking Safety Shoes. The rope-Hiking Safety Shoes.

Drawing tow

• 1 Newly-Leather PVC Bottom Safety Shoes.PU And RUBBER Low Cut Safety Shoes.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,RUBBER 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)Leather PU Bottom Safety Shoes.Waterproof Leather Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Suede Leather Safety Shoes.

The Future

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