Polyester

Background

Dry Abrasive Paper, air, water, and petroleum. Developed in a 20th-century laboratory,Pig Hair Brush. In this reaction,Putty Powder.Old Powder.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Alkyd Varnish. The four basic forms are filament,Extra White Silver Powder Paint, tow, and fiberfill. In the filament form,Gray Steel Structure Special Topcoat, producing smooth-Alkyd Paint.Oil Based Paint, filaments are cut to short,China Expanded PTFE Sheet Supplier.China Expanded PTFE Sheet Manufacture. 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.Full Automatic Spiral Wound Gasket Winding Machine.

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-china cheap Spiral wound gaskets,BX Ring Joint Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,china RX Ring Joint Gasket supplier. 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.RX Ring Joint Gasket, which are usually round,china cheap PTFE Gaskets. The number of holes in the spinneret determines the size of the yarn,PTFE 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,viton 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,NBR gasket.
• SBR gasket,Graphite gaskets. Also,Automatic Winding Machine for Spiral Wound Gaskets,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.

low price Small Winding Machine for Spiral Wound Gasket

Small Winding Machine for Spiral Wound Gasket, 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 Viton rubber sheet factory. The rope-Viton rubber sheet.

Drawing tow

• 1 Newly-china Nitrile Rubber sipplier.Nitrile Rubber.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Natural Rubber Insertion.china EPDM rubber factory.

Cutting

• 4 Following heat setting,Small Winding Machine for Spiral Wound Gasket. 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)Medium Winding Machine for Spiral Wound Gasket.Automatic Winding Machine for Spiral Wound Gaskets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Expanded PTFE Sealing Tape.

The Future

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