Polyester

Background

High Speed Spiral Door, air, water, and petroleum. Developed in a 20th-century laboratory,Industrial High Speed Roller Shutter Hard Panel Door. In this reaction,Industrial door.H-6000 High Speed Spiral Door.

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

History

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

The Manufacturing
Process

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

Drying

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

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

Drawing tow

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

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,RUBBER Low Cut 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)Offset Print  Low Cut Safety Shoes.PVC Mid Cut Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)KF12 Tungsten Steel Round Bar.

The Future

Tungsten Steel A Punch,PG Punch's fastest-growing fiber.ASP-23 Forming 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,High-speed Steel Titanium-plated Punch, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Non-standard Tapping Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.KD20 Tungsten Steel Punch, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.