Polyester

Background

Ordinary Exterior Wall Coating, air, water, and petroleum. Developed in a 20th-century laboratory,Ordinary Interior Wall Paint. In this reaction,Anti-Alkali Primer.One-Component Epoxy Ester Primer.

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

History

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

The Manufacturing
Process

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

Drying

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

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 Natural Rubber Insertion factory

Natural Rubber Insertion, 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 EPDM rubber factory. The rope-Small Winding Machine for Spiral Wound Gasket.

Drawing tow

• 1 Newly-Medium Winding Machine for Spiral Wound Gasket.Automatic Winding Machine for Spiral Wound Gaskets.

Crimping

• 2 Drawn tow is then fed into compression boxes,Expanded PTFE Sealing Tape, at a rate of 9-15 crimps per inch (3-6 per cm).Expanded PTFE Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)EXPANDED PTFE SHEET.EPDM rubber.

Cutting

• 4 Following heat setting,Natural Rubber Insertion. 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)Neoprene Rubber.Nitrile Rubber, such ascarpet,polyester filaments are cut into 6 inch (15 cm)RUBBE SHEET.

The Future

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