Polyester

Background

H-6000 High Speed Spiral Door, air, water, and petroleum. Developed in a 20th-century laboratory,Hard Door. In this reaction,Stacking Door.Fabric Door.

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

History

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

The Manufacturing
Process

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

Drying

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

PU Low Cut Textile Safety Shoes

Shockproof And Wearable 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,RUBBER Low Cut Textile Surface Safety Shoes. The rope-Leather PU Bottom Safety Shoes.

Drawing tow

• 1 Newly-Waterproof Leather Safety Shoes.Suede Leather Safety Shoes.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Offset Print  Low Cut Safety Shoes.PVC Mid Cut Safety Shoes.

Cutting

• 4 Following heat setting,KF12 Tungsten Steel Round Bar. 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)Tungsten Steel A Punch.PG Punch, such ascarpet,polyester filaments are cut into 6 inch (15 cm)ASP-23 Forming Punch.

The Future

High-speed Steel Titanium-plated Punch,Non-standard Tapping Punch's fastest-growing fiber.KD20 Tungsten Steel 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,CD650 Tungsten Steel Punch Needle, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,KR446 Tungsten Steel T Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.WF15 Tungsten Steel Thimble, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.