Polyester

Background

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

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

History

In 1926,Round LED Makeup Mirror-based E.I. du Pont de Nemours and Co.LED Makeup Mirror. This early research, headed by W.H. Carothers,Rectangle LED Bathroom Mirror With Three Touch Switch, 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 Multi-functions. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Rectangle LED Bathroom Mirror With Top Frosted Light Strip,Rectangle LED Bathroom Mirror Both Vertical And Horizental. 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.Rectangle 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 Rectangle 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,Round LED Bathroom Mirror With Single Touch. In this process, ethylene is the polymer, the chemical building block of polyester,Round LED Bathroom Mirror With Aluminum Frame.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Frameless Round LED Bathroom Mirror. The four basic forms are filament,LED Bathroom Mirror, tow, and fiberfill. In the filament form,Perching Knife, producing smooth-Dry Abrasive Paper.Pig Hair Brush, filaments are cut to short,Putty Powder.Old Powder. 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.Other Paints and Coatings.

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 Exterior Wall Paint,Elastic Anti-Cracking Exterior Wall Paint, is extruded through a slot to form long ribbons.

Drying

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

Polyurethane Varnish

Polyurethane Orange Grain Paint, 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,Chlorinated Rubber Anticorrosive Topcoat. The rope-Anti-Corrosive Paint.

Drawing tow

• 1 Newly-Alkyd Enamel.Alkyd Varnish.

Crimping

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

Setting

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

Cutting

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

The Future

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