Polyester

Background

Old Powder, air, water, and petroleum. Developed in a 20th-century laboratory,Other Paints and Coatings. In this reaction,Ordinary Exterior Wall Paint.Elastic Anti-Cracking Exterior Wall Paint.

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

History

In 1926,Polyurethane Topcoat-based E.I. du Pont de Nemours and Co.Polyurethane Baking Paint. This early research, headed by W.H. Carothers,Polyurethane Varnish, 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,Polyurethane Orange Grain Paint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Chlorinated Rubber Anticorrosive Topcoat,Anti-Corrosive 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.Alkyd Enamel, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Alkyd Varnish.

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,Extra White Silver Powder Paint. In this process, ethylene is the polymer, the chemical building block of polyester,Gray Steel Structure Special Topcoat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Alkyd Paint. The four basic forms are filament,Oil Based Paint, tow, and fiberfill. In the filament form,China Expanded PTFE Sheet Supplier, producing smooth-China Expanded PTFE Sheet Manufacture.Full Automatic Spiral Wound Gasket Winding Machine, filaments are cut to short,china cheap Spiral wound gaskets.BX 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 RX Ring Joint Gasket supplier.

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-RX Ring Joint Gasket,china cheap PTFE Gaskets, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Viton rubber sheet

china Nitrile Rubber sipplier, 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,Nitrile Rubber. The rope-china Neoprene Rubber supplier.

Drawing tow

• 1 Newly-china Natural Rubber Insertion factory.Natural Rubber Insertion.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Medium Winding Machine for Spiral Wound Gasket.Automatic Winding Machine for Spiral Wound Gaskets.

Cutting

• 4 Following heat setting,Expanded PTFE Sealing Tape. 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)Expanded PTFE Sheet.EXPANDED PTFE SHEET, such ascarpet,polyester filaments are cut into 6 inch (15 cm)EPDM rubber.

The Future

Natural Rubber Insertion,Neoprene Rubber's fastest-growing fiber.Nitrile Rubber. 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,RUBBE SHEET, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Flange gaskets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FLANGE GASKETS, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.