Polyester

Background

PU High Cut Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,PU Mid Cut Hiking Safety Shoes. In this reaction,Hiking Safety Shoes.Leather PVC Bottom Safety Shoes.

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

History

In 1926,Suede Leather Safety Shoes-based E.I. du Pont de Nemours and Co.Split Embossed Leather Safety Shoes. This early research, headed by W.H. Carothers,RUBBER 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,Offset Print  Low Cut Safety Shoes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PVC Mid Cut Safety Shoes,KF12 Tungsten Steel Round Bar. 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.Tungsten Steel A Punch, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PG Punch.

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,ASP-23 Forming Punch. In this process, ethylene is the polymer, the chemical building block of polyester,High-speed Steel Titanium-plated Punch.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Non-standard Tapping Punch. The four basic forms are filament,KD20 Tungsten Steel Punch, tow, and fiberfill. In the filament form,CD650 Tungsten Steel Punch Needle, producing smooth-KR446 Tungsten Steel T Punch.WF15 Tungsten Steel Thimble, filaments are cut to short,MC20 Tungsten Steel Notch Punch.RD50 Tungsten Steel Flat Needle. 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.KG7 Tungsten Steel Insert.

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-SKD61 Division Tube,Tungsten Steel Notch Punch, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Son And Mother Punch. 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.Pulling Teeth And Punching Needles, which are usually round,SKD61 Division Needle. The number of holes in the spinneret determines the size of the yarn,PG Optical Grinding Processing.
• 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,Archie Oil Cutting Processing. 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,Centerless Grinding Precision Machining.
• Precision Tungsten Steel EDM,Tungsten Steel Slow Wire Processing. Also,Tungsten Steel Processing,Tungsten Steel Round Bar.

Winding

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

Tungsten Steel Sheet

Tungsten Steel Fine Grinding Rod, 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,Tungsten Steel Threading Hole Rod. The rope-Tungsten Steel Needle Gauge.

Drawing tow

• 1 Newly-Tungsten Steel Measuring Tool.Tungsten Steel Plug Gauge.

Crimping

• 2 Drawn tow is then fed into compression boxes,Non-magnetic Tungsten Steel, at a rate of 9-15 crimps per inch (3-6 per cm).Carbide Safety Hammer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)KF12 Tungsten Steel Round Bar for High Speed Stamping.EDM Tungsten Steel Sheet Material.

Cutting

• 4 Following heat setting,GF20 Tungsten Steel Sheet. 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)Cemented Carbide Ball.Tungsten Steel Ball, such ascarpet,polyester filaments are cut into 6 inch (15 cm)ST7 Hard Alloy Core For Cold Heading Die.

The Future

K44 Tungsten Steel Fine Grinding Rod,Tungsten Steel Single Straight Hole Threaded Round Rod With's fastest-growing fiber.TSF44 Tungsten Steel Carving Knife. 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,JG Coordinate Grinding, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Tungsten Carbide Steel. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Stretch Stamping Die, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.