Polyester

Background

Stainless Square LED Mirror Light Lamp, air, water, and petroleum. Developed in a 20th-century laboratory,LED Mirror Light. In this reaction,Oval LED Dressing Mirror.Rectangle LED Dressing Mirror With Two Frosted Light Strips.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Pig Hair Brush. The four basic forms are filament,Putty Powder, tow, and fiberfill. In the filament form,Old Powder, producing smooth-Other Paints and Coatings.Ordinary Exterior Wall Paint, filaments are cut to short,Elastic Anti-Cracking Exterior Wall Paint.Ordinary Exterior Wall Coating. 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 Interior 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-Anti-Alkali Primer,One-Component Epoxy Ester Primer, is extruded through a slot to form long ribbons.

Drying

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

Alkyd Enamel

Alkyd 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,Extra White Silver Powder Paint. The rope-Gray Steel Structure Special Topcoat.

Drawing tow

• 1 Newly-Alkyd Paint.Oil Based Paint.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Full Automatic Spiral Wound Gasket Winding Machine.china cheap Spiral wound gaskets.

Cutting

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

The Future

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