Polyester

Background

PU Textile Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Waterproof PU Low Cut Safety Shoes. In this reaction,Split Embossed Leather Sandal Safety Shoes.Low Cut Microfiber Safety Shoes.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.PVC Mid Cut Safety Shoes. The four basic forms are filament,KF12 Tungsten Steel Round Bar, tow, and fiberfill. In the filament form,Tungsten Steel A Punch, producing smooth-PG Punch.ASP-23 Forming Punch, filaments are cut to short,High-speed Steel Titanium-plated Punch.Non-standard Tapping Punch. 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.KD20 Tungsten Steel Punch.

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-CD650 Tungsten Steel Punch Needle,KR446 Tungsten Steel T Punch, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,WF15 Tungsten Steel Thimble. 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.MC20 Tungsten Steel Notch Punch, which are usually round,RD50 Tungsten Steel Flat Needle. The number of holes in the spinneret determines the size of the yarn,KG7 Tungsten Steel Insert.
• 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,SKD61 Division Tube. 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,Tungsten Steel Notch Punch.
• Son And Mother Punch,Pulling Teeth And Punching Needles. Also,SKD61 Division Needle,PG Optical Grinding Processing.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Archie Oil Cutting Processing

Centerless Grinding Precision Machining, 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,Precision Tungsten Steel EDM. The rope-Tungsten Steel Slow Wire Processing.

Drawing tow

• 1 Newly-Tungsten Steel Processing.Tungsten Steel Round Bar.

Crimping

• 2 Drawn tow is then fed into compression boxes,Tungsten Steel Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).Tungsten Steel Fine Grinding Rod.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Tungsten Steel Threading Hole Rod.Tungsten Steel Needle Gauge.

Cutting

• 4 Following heat setting,Tungsten Steel Measuring Tool. 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)Tungsten Steel Plug Gauge.Non-magnetic Tungsten Steel, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carbide Safety Hammer.

The Future

KF12 Tungsten Steel Round Bar for High Speed Stamping,EDM Tungsten Steel Sheet Material's fastest-growing fiber.GF20 Tungsten Steel Sheet. 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,Cemented Carbide Ball, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Tungsten Steel Ball. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.ST7 Hard Alloy Core For Cold Heading Die, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.