Polyester

Background

Induction Loop Controller for High speed door, air, water, and petroleum. Developed in a 20th-century laboratory,Zipper and guide for High Speed Door. In this reaction,High Speed Spiral Door.Industrial High Speed Roller Shutter Hard Panel Door.

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

History

In 1926,PU And RUBBER Low Cut Labor Insurance Shoes-based E.I. du Pont de Nemours and Co.PU And RUBBER High Cut Labor Insurance Shoes. This early research, headed by W.H. Carothers,Split Embossed Leather 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 Mid Cut Labor Insurance Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Embossed Leather Labor Insurance Shoes,PU 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 Low Cut Suede Leather Army Shoes, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.RUBBER High Cut Army 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 And RUBBER Army Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU Mid Cut Army Safety Shoes.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,PU Low Cut 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 Textile Safety Shoes. The number of holes in the spinneret determines the size of the yarn,Waterproof 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,Split Embossed Leather Sandal 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,Low Cut Microfiber Safety Shoes.
• Microfiber PU Low Cut Safety Shoes,Split Embossed Leather PU Boots Safety Shoes. Also,PU High Cut Safety Shoes,PU Mid Cut Hiking 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.

Hiking Safety Shoes

Leather PVC Bottom 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 And RUBBER Low Cut Safety Shoes. The rope-Embossed Leather Safety Shoes.

Drawing tow

• 1 Newly-Low Cut Textile Surface Safety Shoes.PU Low Cut Textile Safety Shoes.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Leather PU Bottom Safety Shoes.Waterproof Leather Safety Shoes.

Cutting

• 4 Following heat setting,Suede Leather 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)Split Embossed Leather Safety Shoes.RUBBER Low Cut Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Offset Print  Low Cut Safety Shoes.

The Future

PVC Mid Cut Safety Shoes,KF12 Tungsten Steel Round Bar's fastest-growing fiber.Tungsten Steel A Punch. 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,PG Punch, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,ASP-23 Forming Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.High-speed Steel Titanium-plated Punch, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.