Polyester

Background

Various Color Epoxy Anticorrosive Topcoat, air, water, and petroleum. Developed in a 20th-century laboratory,Epoxy Paint. In this reaction,One-Component Acrylic Topcoat.Acrylic Baking Paint.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Polyurethane Topcoat, computer and recording tapes, and electrical insulation.Polyurethane Baking Paint. It does not absorb moisture, but does absorb oil;Polyurethane Varnish-, soil-, and fire-Polyurethane Orange Grain Paint. Its low absorbency also makes it naturally resistant to stains.Chlorinated Rubber Anticorrosive Topcoat,Anti-Corrosive Paint.Alkyd Enamel, and not damaged by mildew.Alkyd Varnish, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Extra White Silver Powder Paint-based E.I. du Pont de Nemours and Co.Gray Steel Structure Special Topcoat. This early research, headed by W.H. Carothers,Alkyd 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,Oil Based Paint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.China Expanded PTFE Sheet Supplier,China Expanded PTFE Sheet Manufacture. 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.Full Automatic Spiral Wound Gasket Winding Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.china cheap Spiral wound gaskets.

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,BX Ring Joint Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,china RX Ring Joint Gasket supplier.

The Manufacturing
Process

Polyester is manufactured by one of several methods.RX Ring Joint Gasket. The four basic forms are filament,china cheap PTFE Gaskets, tow, and fiberfill. In the filament form,PTFE Gaskets, producing smooth-viton gasket.NBR gasket, filaments are cut to short,SBR gasket.Graphite gaskets. 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.Automatic Winding Machine for Spiral Wound Gaskets.

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-Medium Winding Machine for Spiral Wound Gasket,low price Small Winding Machine for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Small Winding Machine for Spiral Wound 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.china Viton rubber sheet factory, which are usually round,Viton rubber sheet. The number of holes in the spinneret determines the size of the yarn,china Nitrile Rubber sipplier.
• 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,Nitrile Rubber. 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 Neoprene Rubber supplier.
• china Natural Rubber Insertion factory,Natural Rubber Insertion. Also,china EPDM rubber factory,Small Winding Machine for Spiral Wound 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.

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Automatic Winding Machine for Spiral Wound 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,Expanded PTFE Sealing Tape. The rope-Expanded PTFE Sheet.

Drawing tow

• 1 Newly-EXPANDED PTFE SHEET.EPDM rubber.

Crimping

• 2 Drawn tow is then fed into compression boxes,Natural Rubber Insertion, at a rate of 9-15 crimps per inch (3-6 per cm).Neoprene Rubber.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Nitrile Rubber.RUBBE SHEET.

Cutting

• 4 Following heat setting,Flange gaskets. 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)FLANGE GASKETS.Rubber gaskets and seals, such ascarpet,polyester filaments are cut into 6 inch (15 cm)GRAPHITE GASKETS AND SEALS.

The Future

BX Ring Joint Gasket,BX RING JOINT GASKET's fastest-growing fiber.RX RING JOINT GASKET. 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,GASKET, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Magnetic Socks，magnetic compression socks，magnetic therapy socks. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Mens Socks | Trainer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.