Polyester

Background

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

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

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.china cheap PTFE Gaskets. The four basic forms are filament,PTFE Gaskets, tow, and fiberfill. In the filament form,viton gasket, producing smooth-NBR gasket.SBR gasket, filaments are cut to short,Graphite gaskets.Automatic Winding Machine for Spiral Wound 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.Medium Winding Machine for Spiral Wound 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-low price Small Winding Machine for Spiral Wound Gasket,Small Winding Machine for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

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

Automatic Winding Machine for Spiral Wound Gaskets

Expanded PTFE Sealing Tape, 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 Sheet. The rope-EXPANDED PTFE SHEET.

Drawing tow

• 1 Newly-EPDM rubber.Natural Rubber Insertion.

Crimping

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

Setting

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

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)Rubber gaskets and seals.GRAPHITE GASKETS AND SEALS, such ascarpet,polyester filaments are cut into 6 inch (15 cm)BX Ring Joint Gasket.

The Future

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