Polyester

Background

LED Bathroom Mirror, air, water, and petroleum. Developed in a 20th-century laboratory,Perching Knife. In this reaction,Dry Abrasive Paper.Pig Hair Brush.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Putty Powder, computer and recording tapes, and electrical insulation.Old Powder. It does not absorb moisture, but does absorb oil;Other Paints and Coatings-, soil-, and fire-Ordinary Exterior Wall Paint. Its low absorbency also makes it naturally resistant to stains.Elastic Anti-Cracking Exterior Wall Paint,Ordinary Exterior Wall Coating.Ordinary Interior Wall Paint, and not damaged by mildew.Anti-Alkali Primer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,One-Component Epoxy Ester Primer-based E.I. du Pont de Nemours and Co.Various Color Epoxy Anticorrosive Topcoat. This early research, headed by W.H. Carothers,Epoxy Paint, 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,One-Component Acrylic Topcoat. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Acrylic Baking Paint,Polyurethane Topcoat. 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.Polyurethane Baking Paint, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Polyurethane Varnish.

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,Polyurethane Orange Grain Paint. In this process, ethylene is the polymer, the chemical building block of polyester,Chlorinated Rubber Anticorrosive Topcoat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Anti-Corrosive Paint. The four basic forms are filament,Alkyd Enamel, tow, and fiberfill. In the filament form,Alkyd Varnish, producing smooth-Extra White Silver Powder Paint.Gray Steel Structure Special Topcoat, filaments are cut to short,Alkyd Paint.Oil Based Paint. 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.China Expanded PTFE Sheet Supplier.

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-China Expanded PTFE Sheet Manufacture,Full Automatic Spiral Wound Gasket Winding Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,china cheap Spiral wound gaskets. 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.BX Ring Joint Gasket, which are usually round,china RX Ring Joint Gasket supplier. The number of holes in the spinneret determines the size of the yarn,RX Ring Joint Gasket.
• 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,china cheap PTFE Gaskets. 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,PTFE Gaskets.
• viton gasket,NBR gasket. Also,SBR gasket,Graphite gaskets.

Winding

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

Automatic Winding Machine for Spiral Wound Gaskets

Medium Winding Machine for Spiral Wound Gasket, 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,low price Small Winding Machine for Spiral Wound Gasket. The rope-Small Winding Machine for Spiral Wound Gasket.

Drawing tow

• 1 Newly-china Viton rubber sheet factory.Viton rubber sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,china Nitrile Rubber sipplier, at a rate of 9-15 crimps per inch (3-6 per cm).Nitrile Rubber.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)china Neoprene Rubber supplier.china Natural Rubber Insertion factory.

Cutting

• 4 Following heat setting,Natural Rubber Insertion. 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 EPDM rubber factory.Small Winding Machine for Spiral Wound Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Medium Winding Machine for Spiral Wound Gasket.

The Future

Automatic Winding Machine for Spiral Wound Gaskets,Expanded PTFE Sealing Tape's fastest-growing fiber.Expanded PTFE Sheet. 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,EXPANDED PTFE SHEET, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,EPDM rubber. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Natural Rubber Insertion, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.