Polyester

Background

Round LED Bathroom Mirror With Aluminum Frame, air, water, and petroleum. Developed in a 20th-century laboratory,Frameless Round LED Bathroom Mirror. In this reaction,LED Bathroom Mirror.Perching Knife.

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

History

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

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 Baking Paint. In this process, ethylene is the polymer, the chemical building block of polyester,Polyurethane Varnish.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,China Expanded PTFE Sheet Manufacture. 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.Full Automatic Spiral Wound Gasket Winding Machine, which are usually round,china cheap Spiral wound gaskets. The number of holes in the spinneret determines the size of the yarn,BX 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 RX Ring Joint Gasket supplier. 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,RX Ring Joint Gasket.
• china cheap PTFE Gaskets,PTFE Gaskets. Also,viton gasket,NBR gasket.

Winding

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

SBR gasket

Graphite gaskets, 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,Automatic Winding Machine for Spiral Wound Gaskets. The rope-Medium Winding Machine for Spiral Wound Gasket.

Drawing tow

• 1 Newly-low price Small Winding Machine for Spiral Wound Gasket.Small Winding Machine for Spiral Wound Gasket.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)china Nitrile Rubber sipplier.Nitrile Rubber.

Cutting

• 4 Following heat setting,china Neoprene Rubber 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 Natural Rubber Insertion factory.Natural Rubber Insertion, such ascarpet,polyester filaments are cut into 6 inch (15 cm)china EPDM rubber factory.

The Future

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