Polyester

Background

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

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

History

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

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 Expanded PTFE Sheet Manufacture. In this process, ethylene is the polymer, the chemical building block of polyester,Full Automatic Spiral Wound Gasket Winding Machine.

The Manufacturing
Process

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

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-SBR gasket,Graphite gaskets, is extruded through a slot to form long ribbons.

Drying

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

Natural Rubber Insertion

china EPDM rubber factory, 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,Small Winding Machine for Spiral Wound Gasket. The rope-Medium Winding Machine for Spiral Wound Gasket.

Drawing tow

• 1 Newly-Automatic Winding Machine for Spiral Wound Gaskets.Expanded PTFE Sealing Tape.

Crimping

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

Setting

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

Cutting

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

The Future

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