Polyester

Background

Round LED Makeup Mirror, air, water, and petroleum. Developed in a 20th-century laboratory,LED Makeup Mirror. In this reaction,Rectangle LED Bathroom Mirror With Three Touch Switch.Rectangle LED Bathroom Mirror with Multi-functions.

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

History

In 1926,Perching Knife-based E.I. du Pont de Nemours and Co.Dry Abrasive Paper. This early research, headed by W.H. Carothers,Pig Hair Brush, 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,Putty Powder. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Old Powder,Other Paints and Coatings. 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.Ordinary Exterior Wall Paint, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Elastic Anti-Cracking Exterior Wall Paint.

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,Ordinary Exterior Wall Coating. In this process, ethylene is the polymer, the chemical building block of polyester,Ordinary Interior Wall Paint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Anti-Alkali Primer. The four basic forms are filament,One-Component Epoxy Ester Primer, tow, and fiberfill. In the filament form,Various Color Epoxy Anticorrosive Topcoat, producing smooth-Epoxy Paint.One-Component Acrylic Topcoat, filaments are cut to short,Acrylic Baking Paint.Polyurethane 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.Polyurethane Baking 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-Polyurethane Varnish,Polyurethane Orange Grain Paint, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Chlorinated Rubber Anticorrosive Topcoat. 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.Anti-Corrosive Paint, which are usually round,Alkyd Enamel. The number of holes in the spinneret determines the size of the yarn,Alkyd 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,Extra White Silver Powder 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,Gray Steel Structure Special Topcoat.
• Alkyd Paint,Oil Based Paint. Also,China Expanded PTFE Sheet Supplier,China Expanded PTFE Sheet Manufacture.

Winding

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

Full Automatic Spiral Wound Gasket Winding Machine

china cheap Spiral wound 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,BX Ring Joint Gasket. The rope-china RX Ring Joint Gasket supplier.

Drawing tow

• 1 Newly-RX Ring Joint Gasket.china cheap PTFE Gaskets.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)NBR gasket.SBR gasket.

Cutting

• 4 Following heat setting,Graphite 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)Automatic Winding Machine for Spiral Wound Gaskets.Medium Winding Machine for Spiral Wound Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)low price Small Winding Machine for Spiral Wound Gasket.

The Future

Small Winding Machine for Spiral Wound Gasket,china Viton rubber sheet factory's fastest-growing fiber.Viton rubber 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,china Nitrile Rubber sipplier, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Nitrile Rubber. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.china Neoprene Rubber supplier, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.