Polyester

Background

Industrial High Speed Roller Shutter Hard Panel Door, air, water, and petroleum. Developed in a 20th-century laboratory,Industrial door. In this reaction,H-6000 High Speed Spiral Door.Hard Door.

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

History

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

The Manufacturing
Process

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

Drying

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

Embossed Leather Safety Shoes

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,PU Low Cut Textile Safety Shoes. The rope-Shockproof And Wearable Safety Shoes.

Drawing tow

• 1 Newly-RUBBER Low Cut Textile Surface Safety Shoes.Leather PU Bottom Safety Shoes.

Crimping

• 2 Drawn tow is then fed into compression boxes,Waterproof Leather Safety Shoes, at a rate of 9-15 crimps per inch (3-6 per cm).Suede Leather Safety Shoes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Split Embossed Leather Safety Shoes.RUBBER Low Cut Safety Shoes.

Cutting

• 4 Following heat setting,Offset Print  Low Cut 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)PVC Mid Cut Safety Shoes.KF12 Tungsten Steel Round Bar, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tungsten Steel A Punch.

The Future

PG Punch,ASP-23 Forming Punch's fastest-growing fiber.High-speed Steel Titanium-plated 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,Non-standard Tapping Punch, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,KD20 Tungsten Steel Punch. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.CD650 Tungsten Steel Punch Needle, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.