Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,H-6000 High Speed Spiral Door, computer and recording tapes, and electrical insulation.Hard Door. It does not absorb moisture, but does absorb oil;Stacking Door-, soil-, and fire-Fabric Door. Its low absorbency also makes it naturally resistant to stains.High speed Stack Door,High Speed Door.RUBBER Low Cut Labor Insurance Shoes, and not damaged by mildew.PU And 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 High Cut Labor Insurance Shoes-based E.I. du Pont de Nemours and Co.Split Embossed Leather Labor Insurance Shoes. This early research, headed by W.H. Carothers,PU Mid 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,Embossed Leather Labor Insurance Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PU Low Cut Labor Insurance Shoes,PU Low Cut Suede Leather Army 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.RUBBER High Cut Army 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 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 Mid Cut Army Safety Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,RUBBER Mid Cut Army Shoes.

The Manufacturing
Process

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

Drying

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

Leather PVC Bottom Safety Shoes

PU And RUBBER Low 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,Embossed Leather Safety Shoes. The rope-Low Cut Textile Surface Safety Shoes.

Drawing tow

• 1 Newly-PU Low Cut Textile Safety Shoes.Shockproof And Wearable Safety Shoes.

Crimping

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

Setting

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

Cutting

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

The Future

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