Polyester

Background

Frameless Rectangle LED Bathroom Mirror, air, water, and petroleum. Developed in a 20th-century laboratory,Round LED Bathroom Mirror With Single Touch. In this reaction,Round LED Bathroom Mirror With Aluminum Frame.Frameless Round LED Bathroom Mirror.

Polyester is used in the manufacture of many products, including clothing, home furnishings,LED Bathroom Mirror, computer and recording tapes, and electrical insulation.Perching Knife. It does not absorb moisture, but does absorb oil;Dry Abrasive Paper-, soil-, and fire-Pig Hair Brush. Its low absorbency also makes it naturally resistant to stains.Putty Powder,Old Powder.Other Paints and Coatings, and not damaged by mildew.Ordinary Exterior Wall Paint, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Elastic Anti-Cracking Exterior Wall Paint-based E.I. du Pont de Nemours and Co.Ordinary Exterior Wall Coating. This early research, headed by W.H. Carothers,Ordinary Interior Wall 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,Anti-Alkali Primer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.One-Component Epoxy Ester Primer,Various Color Epoxy Anticorrosive 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.Epoxy Paint, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.One-Component Acrylic 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,Acrylic Baking Paint. In this process, ethylene is the polymer, the chemical building block of polyester,Polyurethane Topcoat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Polyurethane Baking Paint. The four basic forms are filament,Polyurethane Varnish, tow, and fiberfill. In the filament form,Polyurethane Orange Grain Paint, producing smooth-Chlorinated Rubber Anticorrosive Topcoat.Anti-Corrosive Paint, filaments are cut to short,Alkyd Enamel.Alkyd Varnish. 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.Extra White Silver Powder Paint.

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-Gray Steel Structure Special Topcoat,Alkyd Paint, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Oil Based Paint. 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.China Expanded PTFE Sheet Supplier, which are usually round,China Expanded PTFE Sheet Manufacture. The number of holes in the spinneret determines the size of the yarn,Full Automatic Spiral Wound Gasket Winding Machine.
• 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,china cheap Spiral wound 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,BX Ring Joint Gasket.
• china RX Ring Joint Gasket supplier,RX Ring Joint Gasket. Also,china cheap PTFE Gaskets,PTFE Gaskets.

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 gasket

NBR 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,SBR gasket. The rope-Graphite gaskets.

Drawing tow

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

Crimping

• 2 Drawn tow is then fed into compression boxes,low price Small Winding Machine for Spiral Wound Gasket, 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)china Viton rubber sheet factory.Viton rubber sheet.

Cutting

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

The Future

Natural Rubber Insertion,china EPDM rubber factory's fastest-growing fiber.Small Winding Machine for Spiral Wound Gasket. 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,Medium Winding Machine for Spiral Wound Gasket, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Automatic Winding Machine for Spiral Wound Gaskets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Expanded PTFE Sealing Tape, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.