Polyester

Background

Rectangle LED Bathroom Mirror With Three Touch Switch, air, water, and petroleum. Developed in a 20th-century laboratory,Rectangle LED Bathroom Mirror with Multi-functions. In this reaction,Rectangle LED Bathroom Mirror With Top Frosted Light Strip.Rectangle LED Bathroom Mirror Both Vertical And Horizental.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Various Color Epoxy Anticorrosive Topcoat. The four basic forms are filament,Epoxy Paint, tow, and fiberfill. In the filament form,One-Component Acrylic Topcoat, producing smooth-Acrylic Baking Paint.Polyurethane Topcoat, filaments are cut to short,Polyurethane Baking Paint.Polyurethane 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.Polyurethane Orange Grain 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-Chlorinated Rubber Anticorrosive Topcoat,Anti-Corrosive Paint, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Alkyd Enamel. 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.Alkyd Varnish, which are usually round,Extra White Silver Powder Paint. The number of holes in the spinneret determines the size of the yarn,Gray Steel Structure Special Topcoat.
• 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,Alkyd Paint. 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,Oil Based Paint.
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Winding

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

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china RX Ring Joint Gasket supplier, 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,RX Ring Joint Gasket. The rope-china cheap PTFE Gaskets.

Drawing tow

• 1 Newly-PTFE Gaskets.viton gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,NBR gasket, at a rate of 9-15 crimps per inch (3-6 per cm).SBR gasket.

Setting

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

Cutting

• 4 Following heat setting,Medium 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)low price Small Winding Machine for Spiral Wound Gasket.Small Winding Machine for Spiral Wound Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)china Viton rubber sheet factory.

The Future

Viton rubber sheet,china Nitrile Rubber sipplier'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,china Neoprene Rubber supplier, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,china Natural Rubber Insertion factory. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Natural Rubber Insertion, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.