Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

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 Neoprene Rubber supplier

china Natural Rubber Insertion factory, 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,Natural Rubber Insertion. The rope-china EPDM rubber factory.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

RUBBE SHEET,Flange gaskets'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,Rubber gaskets and seals, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,GRAPHITE GASKETS AND SEALS. 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.