Polyester

Background

Airbag Dock Leveler with good price, air, water, and petroleum. Developed in a 20th-century laboratory,Good quanlity Hydraulic Dock Leveler. In this reaction,Induction Loop Controller for High speed door.Zipper and guide for High Speed Door.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.PU And RUBBER Army Shoes. The four basic forms are filament,PU Mid Cut Army Safety Shoes, tow, and fiberfill. In the filament form,RUBBER Mid Cut Army Shoes, producing smooth-Army Shoes.KPU Low Cut Safety Shoes, filaments are cut to short,PU Low Cut Suede Leather Safety Shoes.Antistatic protective 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 And RUBBER Leather Low Cut 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 Split Embossed Leather Safety Shoes,Leather Surface PU 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 Safety Shoes, which are usually round,PU Low Cut Safety Shoes. The number of holes in the spinneret determines the size of the yarn,Textile Surface PU Bottom 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 Textile 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,Waterproof PU Low Cut Safety Shoes.
• Split Embossed Leather Sandal Safety Shoes,Low Cut Microfiber Safety Shoes. Also,Microfiber PU Low Cut Safety Shoes,Split Embossed Leather PU Boots 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 High Cut Safety Shoes

PU Mid Cut Hiking 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,Hiking Safety Shoes. The rope-Leather PVC Bottom Safety Shoes.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Shockproof And Wearable Safety Shoes.RUBBER Low Cut Textile Surface Safety Shoes.

Cutting

• 4 Following heat setting,Leather PU Bottom 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)Waterproof Leather Safety Shoes.Suede Leather Safety Shoes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Split Embossed Leather Safety Shoes.

The Future

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