Polyester

Background

Stacking Door, air, water, and petroleum. Developed in a 20th-century laboratory,Fabric Door. In this reaction,High speed Stack Door.High Speed Door.

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

History

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

The Manufacturing
Process

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

Drying

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

RUBBER Low Cut Textile Surface Safety Shoes

Leather PU 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,Waterproof Leather Safety Shoes. The rope-Suede Leather Safety Shoes.

Drawing tow

• 1 Newly-Split Embossed Leather Safety Shoes.RUBBER Low Cut Safety Shoes.

Crimping

• 2 Drawn tow is then fed into compression boxes,Offset Print  Low Cut Safety Shoes, at a rate of 9-15 crimps per inch (3-6 per cm).PVC Mid Cut Safety Shoes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)KF12 Tungsten Steel Round Bar.Tungsten Steel A Punch.

Cutting

• 4 Following heat setting,PG Punch. 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)ASP-23 Forming Punch.High-speed Steel Titanium-plated Punch, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Non-standard Tapping Punch.

The Future

KD20 Tungsten Steel Punch,CD650 Tungsten Steel Punch Needle's fastest-growing fiber.KR446 Tungsten Steel T 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,WF15 Tungsten Steel Thimble, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,MC20 Tungsten Steel Notch Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.RD50 Tungsten Steel Flat Needle, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.