Polyester

Background

PU Mid Cut Labor Insurance Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Embossed Leather Labor Insurance Shoes. In this reaction,PU Low Cut Labor Insurance Shoes.PU Low Cut Suede Leather Army Shoes.

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

History

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

The Manufacturing
Process

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

Drying

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

KF12 Tungsten Steel Round Bar

Tungsten Steel A Punch, 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,PG Punch. The rope-ASP-23 Forming Punch.

Drawing tow

• 1 Newly-High-speed Steel Titanium-plated Punch.Non-standard Tapping Punch.

Crimping

• 2 Drawn tow is then fed into compression boxes,KD20 Tungsten Steel Punch, at a rate of 9-15 crimps per inch (3-6 per cm).CD650 Tungsten Steel Punch Needle.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)KR446 Tungsten Steel T Punch.WF15 Tungsten Steel Thimble.

Cutting

• 4 Following heat setting,MC20 Tungsten Steel Notch 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)RD50 Tungsten Steel Flat Needle.KG7 Tungsten Steel Insert, such ascarpet,polyester filaments are cut into 6 inch (15 cm)SKD61 Division Tube.

The Future

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