Polyester

Background

One-Component Epoxy Ester Primer, air, water, and petroleum. Developed in a 20th-century laboratory,Various Color Epoxy Anticorrosive Topcoat. In this reaction,Epoxy Paint.One-Component Acrylic Topcoat.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Acrylic Baking Paint, computer and recording tapes, and electrical insulation.Polyurethane Topcoat. It does not absorb moisture, but does absorb oil;Polyurethane Baking Paint-, soil-, and fire-Polyurethane Varnish. Its low absorbency also makes it naturally resistant to stains.Polyurethane Orange Grain Paint,Chlorinated Rubber Anticorrosive Topcoat.Anti-Corrosive Paint, and not damaged by mildew.Alkyd Enamel, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Alkyd Varnish-based E.I. du Pont de Nemours and Co.Extra White Silver Powder Paint. This early research, headed by W.H. Carothers,Gray Steel Structure Special Topcoat, 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,Alkyd Paint. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Oil Based Paint,China Expanded PTFE Sheet Supplier. 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.China Expanded PTFE Sheet Manufacture, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Full Automatic Spiral Wound Gasket Winding Machine.

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,china cheap Spiral wound gaskets. In this process, ethylene is the polymer, the chemical building block of polyester,BX Ring Joint Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.china RX Ring Joint Gasket supplier. The four basic forms are filament,RX Ring Joint Gasket, tow, and fiberfill. In the filament form,china cheap PTFE Gaskets, producing smooth-PTFE Gaskets.viton gasket, filaments are cut to short,NBR gasket.SBR gasket. 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.Graphite gaskets.

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-Automatic Winding Machine for Spiral Wound Gaskets,Medium Winding Machine for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,low price Small Winding Machine for Spiral Wound Gasket. 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.Small Winding Machine for Spiral Wound Gasket, which are usually round,china Viton rubber sheet factory. The number of holes in the spinneret determines the size of the yarn,Viton rubber sheet.
• 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 Nitrile Rubber sipplier. 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,Nitrile Rubber.
• china Neoprene Rubber supplier,china Natural Rubber Insertion factory. Also,Natural Rubber Insertion,china EPDM rubber factory.

Winding

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

Small Winding Machine for Spiral Wound Gasket

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,Automatic Winding Machine for Spiral Wound Gaskets. The rope-Expanded PTFE Sealing Tape.

Drawing tow

• 1 Newly-Expanded PTFE Sheet.EXPANDED PTFE SHEET.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,RUBBE SHEET. 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)Flange gaskets.FLANGE GASKETS, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Rubber gaskets and seals.

The Future

GRAPHITE GASKETS AND SEALS,BX Ring Joint Gasket's fastest-growing fiber.BX RING JOINT 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,RX RING JOINT GASKET, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,GASKET. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Magnetic Socks，magnetic compression socks，magnetic therapy socks, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.