Polyester

Background

Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling, air, water, and petroleum. Developed in a 20th-century laboratory,Stainless Steel Drop in Anchor Without Knurling. In this reaction,Drop in Anchor.Stainless Steel Chemical Anchor with Hex Nut and Washer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Carbon Steel Zinc Plated Chemical Anchor, computer and recording tapes, and electrical insulation.Carbon Steel Hot Dip Galvanized HDG Chemical Anchor. It does not absorb moisture, but does absorb oil;Chemical Anchor-, soil-, and fire-Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer. Its low absorbency also makes it naturally resistant to stains.Stainless Steel Sleeve Anchor with Fish Fins,Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut, and not damaged by mildew.Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Protective Horse Rubber Boots-based E.I. du Pont de Nemours and Co.Ribbed Rubber Horse Bell Boots. This early research, headed by W.H. Carothers,High Neck Bell Boots For Horse, 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,Horse Rubber Bell Boots. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Horse Rubber Parts,Custom Rubber Gaskets. 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.Rubber Dust Cover, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gear Shift Lever Boot.

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,Auto Rubber Engine Mounting. In this process, ethylene is the polymer, the chemical building block of polyester,Automotive Engine Rubber Mounting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Automotive Rubber Bushings. The four basic forms are filament,Stabilizer Rubber Bushing, tow, and fiberfill. In the filament form,Rubber To Metal Bonding Bushings, producing smooth-Rubber Bushing.Automotive Rubber Parts, filaments are cut to short,Silicone Rubber Rollers.Rubber Coated Rollers. 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.Non-Slip Rubber Feet.

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-Anti Abrasion Rubber Bumpers,Rubber Bumpers, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Square Rubber Grommets. 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.Custom Molded Rubber Parts, which are usually round,Compression Molding Custom Rubber Parts. The number of holes in the spinneret determines the size of the yarn,Extrusion Molding Custom Rubber Parts.
• 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,Custom Neoprene Rubber Products. 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,Custom Rubber Parts Anti-Slip Handle Grip.
• EPDM Rubber Sheets,Rubber Parts. Also,Custom Rubber Parts,Color Plexiglass Sheet For Making Furnitures.

Winding

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

Transparent Plexiglass Sheet For LED Display

Plexiglass Sheet, 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,Pure Raw Materials Color Extruded Acrylic Sheet. The rope-Extruded Acrylic Sheet.

Drawing tow

• 1 Newly-Transparent PMMA Sheet For Making Face Shields.White Color PMMA Plastic Sheet For Making Bathtub.

Crimping

• 2 Drawn tow is then fed into compression boxes,Color PMMA Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).Color Cast Acrylic Sheet For Making Luminous Characters.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Red Color Cast Acrylic Sheet.Grade A Color Cast Acrylic Sheet.

Cutting

• 4 Following heat setting,Color Cast Acrylic 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)Transparent Cast Acrylic Sheet Used For Building Materials.Frosted Transparent Cast Acrylic Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Transparent Cast Acrylic Sheet For UV Painting.

The Future

Cast Acrylic Sheet,Waterproof White Sintra Board's fastest-growing fiber.White Sintra Board. 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,3mm Color Sintra Board, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Color Sintra Board. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Forex Board, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.