Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Alkyd Paint,Oil Based Paint, is extruded through a slot to form long ribbons.

Drying

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

NBR gasket

SBR 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,Graphite gaskets. The rope-Automatic Winding Machine for Spiral Wound Gaskets.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Viton rubber sheet.china Nitrile Rubber sipplier.

Cutting

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

The Future

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