Polyester

Background

Stainless Steel Round Coupling Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Stainless Steel Hex Coupling Nut with Holes. In this reaction,Coupling Nut.Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Stainless Steel Drop in Anchor with Knurling and Lip, computer and recording tapes, and electrical insulation.Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling. It does not absorb moisture, but does absorb oil;Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling-, soil-, and fire-Stainless Steel Drop in Anchor Without Knurling. Its low absorbency also makes it naturally resistant to stains.Drop in Anchor,Stainless Steel Chemical Anchor with Hex Nut and Washer.Carbon Steel Zinc Plated Chemical Anchor, and not damaged by mildew.Carbon Steel Hot Dip Galvanized HDG Chemical Anchor, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Chemical Anchor-based E.I. du Pont de Nemours and Co.Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer. This early research, headed by W.H. Carothers,Stainless Steel Sleeve Anchor with Fish Fins, 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,Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip. 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.Protective Horse Rubber Boots, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Ribbed Rubber Horse Bell Boots.

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,High Neck Bell Boots For Horse. In this process, ethylene is the polymer, the chemical building block of polyester,Horse Rubber Bell Boots.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Horse Rubber Parts. The four basic forms are filament,Custom Rubber Gaskets, tow, and fiberfill. In the filament form,Rubber Dust Cover, producing smooth-Gear Shift Lever Boot.Auto Rubber Engine Mounting, filaments are cut to short,Automotive Engine Rubber Mounting.Automotive Rubber Bushings. 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.Stabilizer Rubber Bushing.

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-Rubber To Metal Bonding Bushings,Rubber Bushing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Automotive Rubber Parts. 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.Silicone Rubber Rollers, which are usually round,Rubber Coated Rollers. The number of holes in the spinneret determines the size of the yarn,Non-Slip Rubber Feet.
• 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 Abrasion Rubber Bumpers. 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,Rubber Bumpers.
• Square Rubber Grommets,Custom Molded Rubber Parts. Also,Compression Molding Custom Rubber Parts,Extrusion Molding Custom Rubber Parts.

Winding

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

Custom Neoprene Rubber Products

Custom Rubber Parts Anti-Slip Handle Grip, 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,EPDM Rubber Sheets. The rope-Rubber Parts.

Drawing tow

• 1 Newly-Custom Rubber Parts.Color Plexiglass Sheet For Making Furnitures.

Crimping

• 2 Drawn tow is then fed into compression boxes,Transparent Plexiglass Sheet For LED Display, at a rate of 9-15 crimps per inch (3-6 per cm).Plexiglass Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pure Raw Materials Color Extruded Acrylic Sheet.Extruded Acrylic Sheet.

Cutting

• 4 Following heat setting,Transparent PMMA Sheet For Making Face Shields. 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)White Color PMMA Plastic Sheet For Making Bathtub.Color PMMA Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Color Cast Acrylic Sheet For Making Luminous Characters.

The Future

Red Color Cast Acrylic Sheet,Grade A Color Cast Acrylic Sheet's fastest-growing fiber.Color Cast Acrylic 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,Transparent Cast Acrylic Sheet Used For Building Materials, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Frosted Transparent Cast Acrylic Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Transparent Cast Acrylic Sheet For UV Painting, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.