Polyester

Background

RUBBER Low Cut Labor Insurance Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,PU And RUBBER Low Cut Labor Insurance Shoes. In this reaction,PU And RUBBER High Cut Labor Insurance Shoes.Split Embossed Leather Labor Insurance Shoes.

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

History

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

The Manufacturing
Process

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

Drying

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

Split Embossed Leather Safety Shoes

RUBBER Low Cut 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,Offset Print  Low Cut Safety Shoes. The rope-PVC Mid Cut Safety Shoes.

Drawing tow

• 1 Newly-KF12 Tungsten Steel Round Bar.Tungsten Steel A Punch.

Crimping

• 2 Drawn tow is then fed into compression boxes,PG Punch, at a rate of 9-15 crimps per inch (3-6 per cm).ASP-23 Forming Punch.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)High-speed Steel Titanium-plated Punch.Non-standard Tapping Punch.

Cutting

• 4 Following heat setting,KD20 Tungsten Steel 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)CD650 Tungsten Steel Punch Needle.KR446 Tungsten Steel T Punch, such ascarpet,polyester filaments are cut into 6 inch (15 cm)WF15 Tungsten Steel Thimble.

The Future

MC20 Tungsten Steel Notch Punch,RD50 Tungsten Steel Flat Needle's fastest-growing fiber.KG7 Tungsten Steel Insert. 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,SKD61 Division Tube, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Tungsten Steel Notch Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Son And Mother Punch, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.