Polyester

Background

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

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

History

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

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,Epoxy Paint. In this process, ethylene is the polymer, the chemical building block of polyester,One-Component Acrylic Topcoat.

The Manufacturing
Process

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

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 Varnish,Extra White Silver Powder Paint, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Gray Steel Structure Special Topcoat. 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.Alkyd Paint, which are usually round,Oil Based Paint. The number of holes in the spinneret determines the size of the yarn,China Expanded PTFE Sheet Supplier.
• 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 Manufacture. 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,Full Automatic Spiral Wound Gasket Winding Machine.
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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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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,viton gasket. The rope-NBR gasket.

Drawing tow

• 1 Newly-SBR gasket.Graphite gaskets.

Crimping

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

Setting

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

Cutting

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

The Future

china Neoprene Rubber supplier,china Natural Rubber Insertion factory's fastest-growing fiber.Natural Rubber Insertion. 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 EPDM rubber factory, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Small Winding Machine for Spiral Wound Gasket. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Medium 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.