Polyester

Background

Other Paints and Coatings, air, water, and petroleum. Developed in a 20th-century laboratory,Ordinary Exterior Wall Paint. In this reaction,Elastic Anti-Cracking Exterior Wall Paint.Ordinary Exterior Wall Coating.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ordinary Interior Wall Paint, computer and recording tapes, and electrical insulation.Anti-Alkali Primer. It does not absorb moisture, but does absorb oil;One-Component Epoxy Ester Primer-, soil-, and fire-Various Color Epoxy Anticorrosive Topcoat. Its low absorbency also makes it naturally resistant to stains.Epoxy Paint,One-Component Acrylic Topcoat.Acrylic Baking Paint, and not damaged by mildew.Polyurethane Topcoat, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Polyurethane Baking Paint-based E.I. du Pont de Nemours and Co.Polyurethane Varnish. This early research, headed by W.H. Carothers,Polyurethane Orange Grain 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,Chlorinated Rubber Anticorrosive Topcoat. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Anti-Corrosive Paint,Alkyd Enamel. 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.Alkyd Varnish, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Extra White Silver Powder Paint.

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,Gray Steel Structure Special Topcoat. In this process, ethylene is the polymer, the chemical building block of polyester,Alkyd Paint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Oil Based Paint. The four basic forms are filament,China Expanded PTFE Sheet Supplier, tow, and fiberfill. In the filament form,China Expanded PTFE Sheet Manufacture, producing smooth-Full Automatic Spiral Wound Gasket Winding Machine.china cheap Spiral wound gaskets, filaments are cut to short,BX Ring Joint Gasket.china RX Ring Joint Gasket supplier. 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.RX Ring Joint Gasket.

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-china cheap PTFE Gaskets,PTFE Gaskets, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,viton gasket. 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.NBR gasket, which are usually round,SBR gasket. The number of holes in the spinneret determines the size of the yarn,Graphite gaskets.
• 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,Automatic Winding Machine for Spiral Wound Gaskets. 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,Medium Winding Machine for Spiral Wound Gasket.
• low price Small Winding Machine for Spiral Wound Gasket,Small Winding Machine for Spiral Wound Gasket. Also,china Viton rubber sheet factory,Viton rubber sheet.

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 Nitrile Rubber sipplier

Nitrile Rubber, 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 Neoprene Rubber supplier. The rope-china Natural Rubber Insertion factory.

Drawing tow

• 1 Newly-Natural Rubber Insertion.china EPDM rubber factory.

Crimping

• 2 Drawn tow is then fed into compression boxes,Small Winding Machine for Spiral Wound Gasket, 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)Automatic Winding Machine for Spiral Wound Gaskets.Expanded PTFE Sealing Tape.

Cutting

• 4 Following heat setting,Expanded PTFE 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)EXPANDED PTFE SHEET.EPDM rubber, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Natural Rubber Insertion.

The Future

Neoprene Rubber,Nitrile Rubber's fastest-growing fiber.RUBBE SHEET. 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,Flange gaskets, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FLANGE GASKETS. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Rubber gaskets and seals, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.