Polyester

Background

Rectangle LED Bathroom Mirror With Top Frosted Light Strip, air, water, and petroleum. Developed in a 20th-century laboratory,Rectangle LED Bathroom Mirror Both Vertical And Horizental. In this reaction,Rectangle LED Bathroom Mirror With Aluminum Frame.Frameless Rectangle LED Bathroom Mirror.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Round LED Bathroom Mirror With Single Touch, computer and recording tapes, and electrical insulation.Round LED Bathroom Mirror With Aluminum Frame. It does not absorb moisture, but does absorb oil;Frameless Round LED Bathroom Mirror-, soil-, and fire-LED Bathroom Mirror. Its low absorbency also makes it naturally resistant to stains.Perching Knife,Dry Abrasive Paper.Pig Hair Brush, and not damaged by mildew.Putty Powder, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Old Powder-based E.I. du Pont de Nemours and Co.Other Paints and Coatings. This early research, headed by W.H. Carothers,Ordinary Exterior Wall Paint, 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,Elastic Anti-Cracking Exterior Wall Paint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Ordinary Exterior Wall Coating,Ordinary Interior Wall Paint. 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.Anti-Alkali Primer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.One-Component Epoxy Ester Primer.

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,Various Color Epoxy Anticorrosive Topcoat. In this process, ethylene is the polymer, the chemical building block of polyester,Epoxy Paint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.One-Component Acrylic Topcoat. The four basic forms are filament,Acrylic Baking Paint, tow, and fiberfill. In the filament form,Polyurethane Topcoat, producing smooth-Polyurethane Baking Paint.Polyurethane Varnish, filaments are cut to short,Polyurethane Orange Grain Paint.Chlorinated Rubber Anticorrosive Topcoat. 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.Anti-Corrosive Paint.

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-Alkyd Enamel,Alkyd Varnish, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Extra White Silver Powder Paint. 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.Gray Steel Structure Special Topcoat, which are usually round,Alkyd Paint. The number of holes in the spinneret determines the size of the yarn,Oil Based Paint.
• 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,China Expanded PTFE Sheet Supplier. 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,China Expanded PTFE Sheet Manufacture.
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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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china cheap PTFE Gaskets, 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,PTFE Gaskets. The rope-viton gasket.

Drawing tow

• 1 Newly-NBR gasket.SBR gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Graphite gaskets, at a rate of 9-15 crimps per inch (3-6 per cm).Automatic Winding Machine for Spiral Wound Gaskets.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Medium Winding Machine for Spiral Wound Gasket.low price Small Winding Machine for Spiral Wound Gasket.

Cutting

• 4 Following heat setting,Small Winding Machine for Spiral Wound Gasket. 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)china Viton rubber sheet factory.Viton rubber sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)china Nitrile Rubber sipplier.

The Future

Nitrile Rubber,china Neoprene Rubber supplier's fastest-growing fiber.china Natural Rubber Insertion factory. 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,Natural Rubber Insertion, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,china EPDM rubber factory. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Small Winding Machine for Spiral Wound Gasket, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.