Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Extra White Silver Powder Paint,Gray Steel Structure Special Topcoat, is extruded through a slot to form long ribbons.

Drying

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

PTFE Gaskets

viton 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,NBR gasket. The rope-SBR gasket.

Drawing tow

• 1 Newly-Graphite gaskets.Automatic Winding Machine for Spiral Wound Gaskets.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Small Winding Machine for Spiral Wound Gasket.china Viton rubber sheet factory.

Cutting

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

The Future

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