Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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-Other Paints and Coatings,Ordinary Exterior Wall Paint, is extruded through a slot to form long ribbons.

Drying

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

Polyurethane Baking Paint

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

Drawing tow

• 1 Newly-Anti-Corrosive Paint.Alkyd Enamel.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Gray Steel Structure Special Topcoat.Alkyd Paint.

Cutting

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

The Future

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