Polyester

Background

PU Low Cut Textile Safety Shoes, air, water, and petroleum. Developed in a 20th-century laboratory,Shockproof And Wearable Safety Shoes. In this reaction,RUBBER Low Cut Textile Surface Safety Shoes.Leather PU Bottom Safety Shoes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Waterproof Leather Safety Shoes, computer and recording tapes, and electrical insulation.Suede Leather Safety Shoes. It does not absorb moisture, but does absorb oil;Split Embossed Leather Safety Shoes-, soil-, and fire-RUBBER Low Cut Safety Shoes. Its low absorbency also makes it naturally resistant to stains.Offset Print  Low Cut Safety Shoes,PVC Mid Cut Safety Shoes.KF12 Tungsten Steel Round Bar, and not damaged by mildew.Tungsten Steel A Punch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PG Punch-based E.I. du Pont de Nemours and Co.ASP-23 Forming Punch. This early research, headed by W.H. Carothers,High-speed Steel Titanium-plated Punch, 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,Non-standard Tapping Punch. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.KD20 Tungsten Steel Punch,CD650 Tungsten Steel Punch Needle. 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.KR446 Tungsten Steel T Punch, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.WF15 Tungsten Steel Thimble.

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,MC20 Tungsten Steel Notch Punch. In this process, ethylene is the polymer, the chemical building block of polyester,RD50 Tungsten Steel Flat Needle.

The Manufacturing
Process

Polyester is manufactured by one of several methods.KG7 Tungsten Steel Insert. The four basic forms are filament,SKD61 Division Tube, tow, and fiberfill. In the filament form,Tungsten Steel Notch Punch, producing smooth-Son And Mother Punch.Pulling Teeth And Punching Needles, filaments are cut to short,SKD61 Division Needle.PG Optical Grinding Processing. 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.Archie Oil Cutting Processing.

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-Centerless Grinding Precision Machining,Precision Tungsten Steel EDM, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tungsten Steel Slow Wire Processing. 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.Tungsten Steel Processing, which are usually round,Tungsten Steel Round Bar. The number of holes in the spinneret determines the size of the yarn,Tungsten Steel Sheet.
• 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,Tungsten Steel Fine Grinding Rod. 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 Threading Hole Rod.
• Tungsten Steel Needle Gauge,Tungsten Steel Measuring Tool. Also,Tungsten Steel Plug Gauge,Non-magnetic Tungsten Steel.

Winding

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

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KF12 Tungsten Steel Round Bar for High Speed Stamping, 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,EDM Tungsten Steel Sheet Material. The rope-GF20 Tungsten Steel Sheet.

Drawing tow

• 1 Newly-Cemented Carbide Ball.Tungsten Steel Ball.

Crimping

• 2 Drawn tow is then fed into compression boxes,ST7 Hard Alloy Core For Cold Heading Die, at a rate of 9-15 crimps per inch (3-6 per cm).K44 Tungsten Steel Fine Grinding Rod.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Tungsten Steel Single Straight Hole Threaded Round Rod With.TSF44 Tungsten Steel Carving Knife.

Cutting

• 4 Following heat setting,JG Coordinate Grinding. 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 Carbide Steel.Stretch Stamping Die, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Powder Metallurgy Mold.

The Future

Motor Progressive Die,Stainless Steel LED Mould's fastest-growing fiber.Terminal Stamping Die. 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,Wire Drawing Core Die, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,IC Semiconductor Packaging Mold. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Lead Frame Mold, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.