Polyester

Background

Wall Mounted LED Mirror Cabinet with Two Doors, air, water, and petroleum. Developed in a 20th-century laboratory,LED Lighted Mirror Cabinet with Single Door. In this reaction,Plastic Cylinder LED Mirror Light Lamp.Stainless Square LED Mirror Light Lamp.

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

History

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

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,Round LED Bathroom Mirror With Aluminum Frame. In this process, ethylene is the polymer, the chemical building block of polyester,Frameless Round LED Bathroom Mirror.

The Manufacturing
Process

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

Drying

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

Winding

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

Polyurethane Orange Grain Paint

Chlorinated Rubber Anticorrosive Topcoat, 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,Anti-Corrosive Paint. The rope-Alkyd Enamel.

Drawing tow

• 1 Newly-Alkyd Varnish.Extra White Silver Powder Paint.

Crimping

• 2 Drawn tow is then fed into compression boxes,Gray Steel Structure Special Topcoat, at a rate of 9-15 crimps per inch (3-6 per cm).Alkyd Paint.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Oil Based Paint.China Expanded PTFE Sheet Supplier.

Cutting

• 4 Following heat setting,China Expanded PTFE Sheet Manufacture. 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)Full Automatic Spiral Wound Gasket Winding Machine.china cheap Spiral wound gaskets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)BX Ring Joint Gasket.

The Future

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