Polyester

Background

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

History

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

The Manufacturing
Process

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

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-Anti-Corrosive Paint,Alkyd Enamel, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Alkyd Varnish. 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.Extra White Silver Powder Paint, which are usually round,Gray Steel Structure Special Topcoat. The number of holes in the spinneret determines the size of the yarn,Alkyd 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,Oil Based Paint. 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 Supplier.
• China Expanded PTFE Sheet Manufacture,Full Automatic Spiral Wound Gasket Winding Machine. Also,china cheap Spiral wound gaskets,BX Ring Joint Gasket.

Winding

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

china RX Ring Joint Gasket supplier

RX Ring Joint Gasket, 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,china cheap PTFE Gaskets. The rope-PTFE Gaskets.

Drawing tow

• 1 Newly-viton gasket.NBR gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,SBR gasket, at a rate of 9-15 crimps per inch (3-6 per cm).Graphite gaskets.

Setting

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

Cutting

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

The Future

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