Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Offset Print  Low Cut Safety Shoes

PVC Mid 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,KF12 Tungsten Steel Round Bar. The rope-Tungsten Steel A Punch.

Drawing tow

• 1 Newly-PG Punch.ASP-23 Forming Punch.

Crimping

• 2 Drawn tow is then fed into compression boxes,High-speed Steel Titanium-plated Punch, at a rate of 9-15 crimps per inch (3-6 per cm).Non-standard Tapping Punch.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)KD20 Tungsten Steel Punch.CD650 Tungsten Steel Punch Needle.

Cutting

• 4 Following heat setting,KR446 Tungsten Steel T 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)WF15 Tungsten Steel Thimble.MC20 Tungsten Steel Notch Punch, such ascarpet,polyester filaments are cut into 6 inch (15 cm)RD50 Tungsten Steel Flat Needle.

The Future

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