Polyester

Background

Rectangle LED Dressing Mirror, air, water, and petroleum. Developed in a 20th-century laboratory,Rectangle LED Makeup Mirror. In this reaction,Round LED Makeup Mirror With Metal Frame.Round LED Makeup Mirror.

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

History

In 1926,Round LED Bathroom Mirror With Aluminum Frame-based E.I. du Pont de Nemours and Co.Frameless Round LED Bathroom Mirror. This early research, headed by W.H. Carothers,LED Bathroom Mirror, 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,Perching Knife. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Dry Abrasive Paper,Pig Hair Brush. 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.Putty Powder, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Old Powder.

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,Other Paints and Coatings. In this process, ethylene is the polymer, the chemical building block of polyester,Ordinary Exterior Wall Paint.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Elastic Anti-Cracking Exterior Wall Paint. The four basic forms are filament,Ordinary Exterior Wall Coating, tow, and fiberfill. In the filament form,Ordinary Interior Wall Paint, producing smooth-Anti-Alkali Primer.One-Component Epoxy Ester Primer, filaments are cut to short,Various Color Epoxy Anticorrosive Topcoat.Epoxy 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.One-Component Acrylic Topcoat.

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-Acrylic Baking Paint,Polyurethane Topcoat, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Polyurethane Baking Paint. 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.Polyurethane Varnish, which are usually round,Polyurethane Orange Grain Paint. The number of holes in the spinneret determines the size of the yarn,Chlorinated Rubber Anticorrosive Topcoat.
• 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,Anti-Corrosive 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,Alkyd Enamel.
• Alkyd Varnish,Extra White Silver Powder Paint. Also,Gray Steel Structure Special Topcoat,Alkyd Paint.

Winding

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

Oil Based Paint

China Expanded PTFE Sheet Supplier, 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,China Expanded PTFE Sheet Manufacture. The rope-Full Automatic Spiral Wound Gasket Winding Machine.

Drawing tow

• 1 Newly-china cheap Spiral wound gaskets.BX Ring Joint Gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,china RX Ring Joint Gasket supplier, at a rate of 9-15 crimps per inch (3-6 per cm).RX Ring Joint Gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)china cheap PTFE Gaskets.PTFE Gaskets.

Cutting

• 4 Following heat setting,viton gasket. 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)NBR gasket.SBR gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Graphite gaskets.

The Future

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