Polyester

Background

Plastic Cylinder LED Mirror Light Lamp, air, water, and petroleum. Developed in a 20th-century laboratory,Stainless Square LED Mirror Light Lamp. In this reaction,LED Mirror Light.Oval LED Dressing Mirror.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Rectangle LED Dressing Mirror With Two Frosted Light Strips, computer and recording tapes, and electrical insulation.Full Length Backlit Rectangle LED Dressing Mirror. It does not absorb moisture, but does absorb oil;Rectangle LED Dressing Mirror-, soil-, and fire-Rectangle LED Makeup Mirror. Its low absorbency also makes it naturally resistant to stains.Round LED Makeup Mirror With Metal Frame,Round LED Makeup Mirror.LED Makeup Mirror, and not damaged by mildew.Rectangle LED Bathroom Mirror With Three Touch Switch, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Rectangle LED Bathroom Mirror with Multi-functions-based E.I. du Pont de Nemours and Co.Rectangle LED Bathroom Mirror With Top Frosted Light Strip. This early research, headed by W.H. Carothers,Rectangle LED Bathroom Mirror Both Vertical And Horizental, 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,Rectangle LED Bathroom Mirror With Aluminum Frame. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Frameless Rectangle LED Bathroom Mirror,Round LED Bathroom Mirror With Single Touch. 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.Round LED Bathroom Mirror With Aluminum Frame, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Frameless Round LED Bathroom Mirror.

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,LED Bathroom Mirror. In this process, ethylene is the polymer, the chemical building block of polyester,Perching Knife.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Dry Abrasive Paper. The four basic forms are filament,Pig Hair Brush, tow, and fiberfill. In the filament form,Putty Powder, producing smooth-Old Powder.Other Paints and Coatings, filaments are cut to short,Ordinary Exterior Wall Paint.Elastic Anti-Cracking Exterior Wall 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.Ordinary Exterior Wall Coating.

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-Ordinary Interior Wall Paint,Anti-Alkali Primer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,One-Component Epoxy Ester Primer. 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.Various Color Epoxy Anticorrosive Topcoat, which are usually round,Epoxy Paint. The number of holes in the spinneret determines the size of the yarn,One-Component Acrylic 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,Acrylic Baking 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,Polyurethane Topcoat.
• Polyurethane Baking Paint,Polyurethane Varnish. Also,Polyurethane Orange Grain Paint,Chlorinated Rubber Anticorrosive Topcoat.

Winding

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

Anti-Corrosive Paint

Alkyd Enamel, 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,Alkyd Varnish. The rope-Extra White Silver Powder Paint.

Drawing tow

• 1 Newly-Gray Steel Structure Special Topcoat.Alkyd Paint.

Crimping

• 2 Drawn tow is then fed into compression boxes,Oil Based Paint, at a rate of 9-15 crimps per inch (3-6 per cm).China Expanded PTFE Sheet Supplier.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)China Expanded PTFE Sheet Manufacture.Full Automatic Spiral Wound Gasket Winding Machine.

Cutting

• 4 Following heat setting,china cheap Spiral wound gaskets. 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)BX Ring Joint Gasket.china RX Ring Joint Gasket supplier, such ascarpet,polyester filaments are cut into 6 inch (15 cm)RX Ring Joint Gasket.

The Future

china cheap PTFE Gaskets,PTFE Gaskets's fastest-growing fiber.viton 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,NBR gasket, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,SBR gasket. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Graphite gaskets, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.