Polyester

Background

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

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

History

In 1926,PU Low Cut Suede Leather Army Shoes-based E.I. du Pont de Nemours and Co.RUBBER High Cut Army Shoes. This early research, headed by W.H. Carothers,PU And RUBBER 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 Mid Cut Army Safety Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.RUBBER Mid Cut Army Shoes,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.KPU Low Cut Safety 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 Suede Leather 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,Antistatic protective Safety Shoes. In this process, ethylene is the polymer, the chemical building block of polyester,PU And RUBBER Leather Low Cut Safety Shoes.

The Manufacturing
Process

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

Drying

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

Shockproof And Wearable Safety Shoes

RUBBER Low Cut Textile Surface 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,Leather PU Bottom Safety Shoes. The rope-Waterproof Leather Safety Shoes.

Drawing tow

• 1 Newly-Suede Leather Safety Shoes.Split Embossed Leather Safety Shoes.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PVC Mid Cut Safety Shoes.KF12 Tungsten Steel Round Bar.

Cutting

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

The Future

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