Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Winding

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

Nitrile Rubber

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

Drawing tow

• 1 Newly-china EPDM rubber factory.Small Winding Machine for Spiral Wound Gasket.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Expanded PTFE Sealing Tape.Expanded PTFE Sheet.

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)EPDM rubber.Natural Rubber Insertion, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Neoprene Rubber.

The Future

Nitrile Rubber,RUBBE SHEET's fastest-growing fiber.Flange gaskets. 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,Rubber gaskets and seals. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.GRAPHITE 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.