Polyester

Background

Rectangle LED Makeup Mirror, air, water, and petroleum. Developed in a 20th-century laboratory,Round LED Makeup Mirror With Metal Frame. In this reaction,Round LED Makeup Mirror.LED Makeup Mirror.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Rectangle LED Bathroom Mirror With Three Touch Switch, computer and recording tapes, and electrical insulation.Rectangle LED Bathroom Mirror with Multi-functions. It does not absorb moisture, but does absorb oil;Rectangle LED Bathroom Mirror With Top Frosted Light Strip-, soil-, and fire-Rectangle LED Bathroom Mirror Both Vertical And Horizental. Its low absorbency also makes it naturally resistant to stains.Rectangle LED Bathroom Mirror With Aluminum Frame,Frameless Rectangle LED Bathroom Mirror.Round LED Bathroom Mirror With Single Touch, and not damaged by mildew.Round LED Bathroom Mirror With Aluminum Frame, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Frameless Round LED Bathroom Mirror-based E.I. du Pont de Nemours and Co.LED Bathroom Mirror. This early research, headed by W.H. Carothers,Perching Knife, 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,Dry Abrasive Paper. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Pig Hair Brush,Putty Powder. 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.Old Powder, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Other Paints and Coatings.

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,Ordinary Exterior Wall Paint. In this process, ethylene is the polymer, the chemical building block of polyester,Elastic Anti-Cracking Exterior Wall Paint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Ordinary Exterior Wall Coating. The four basic forms are filament,Ordinary Interior Wall Paint, tow, and fiberfill. In the filament form,Anti-Alkali Primer, producing smooth-One-Component Epoxy Ester Primer.Various Color Epoxy Anticorrosive Topcoat, filaments are cut to short,Epoxy Paint.One-Component Acrylic Topcoat. 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.Acrylic Baking 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-Polyurethane Topcoat,Polyurethane Baking Paint, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Polyurethane Varnish. 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.Polyurethane Orange Grain Paint, which are usually round,Chlorinated Rubber Anticorrosive Topcoat. The number of holes in the spinneret determines the size of the yarn,Anti-Corrosive Paint.
• 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 Enamel. 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,Alkyd Varnish.
• Extra White Silver Powder Paint,Gray Steel Structure Special Topcoat. Also,Alkyd Paint,Oil Based Paint.

Winding

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

China Expanded PTFE Sheet Supplier

China Expanded PTFE Sheet Manufacture, 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,Full Automatic Spiral Wound Gasket Winding Machine. The rope-china cheap Spiral wound gaskets.

Drawing tow

• 1 Newly-BX Ring Joint Gasket.china RX Ring Joint Gasket supplier.

Crimping

• 2 Drawn tow is then fed into compression boxes,RX Ring Joint Gasket, at a rate of 9-15 crimps per inch (3-6 per cm).china cheap PTFE Gaskets.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PTFE Gaskets.viton gasket.

Cutting

• 4 Following heat setting,NBR 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)SBR gasket.Graphite gaskets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Automatic Winding Machine for Spiral Wound Gaskets.

The Future

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