Polyester

Background

Rectangle LED Dressing Mirror With Two Frosted Light Strips, air, water, and petroleum. Developed in a 20th-century laboratory,Full Length Backlit Rectangle LED Dressing Mirror. In this reaction,Rectangle LED Dressing Mirror.Rectangle LED Makeup Mirror.

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

History

In 1926,Frameless Rectangle LED Bathroom Mirror-based E.I. du Pont de Nemours and Co.Round LED Bathroom Mirror With Single Touch. This early research, headed by W.H. Carothers,Round 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 Round LED Bathroom Mirror. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.LED Bathroom Mirror,Perching Knife. 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.Dry Abrasive Paper, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Pig Hair Brush.

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,Putty Powder. In this process, ethylene is the polymer, the chemical building block of polyester,Old Powder.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Other Paints and Coatings. The four basic forms are filament,Ordinary Exterior Wall Paint, tow, and fiberfill. In the filament form,Elastic Anti-Cracking Exterior Wall Paint, producing smooth-Ordinary Exterior Wall Coating.Ordinary Interior Wall Paint, filaments are cut to short,Anti-Alkali Primer.One-Component Epoxy Ester Primer. 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.Various Color Epoxy Anticorrosive Topcoat.

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-Epoxy Paint,One-Component Acrylic Topcoat, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Acrylic Baking 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.Polyurethane Topcoat, which are usually round,Polyurethane Baking Paint. The number of holes in the spinneret determines the size of the yarn,Polyurethane Varnish.
• 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 Orange Grain 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,Chlorinated Rubber Anticorrosive Topcoat.
• Anti-Corrosive Paint,Alkyd Enamel. Also,Alkyd Varnish,Extra White Silver Powder 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.

Gray Steel Structure Special Topcoat

Alkyd 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,Oil Based Paint. The rope-China Expanded PTFE Sheet Supplier.

Drawing tow

• 1 Newly-China Expanded PTFE Sheet Manufacture.Full Automatic Spiral Wound Gasket Winding Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,china cheap Spiral wound gaskets, at a rate of 9-15 crimps per inch (3-6 per cm).BX Ring Joint Gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)china RX Ring Joint Gasket supplier.RX Ring Joint Gasket.

Cutting

• 4 Following heat setting,china cheap PTFE 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)PTFE Gaskets.viton gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)NBR gasket.

The Future

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