Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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 Bushing,Automotive Rubber Parts, is extruded through a slot to form long ribbons.

Drying

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

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 Rubber Parts Anti-Slip Handle Grip

EPDM Rubber Sheets, 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,Rubber Parts. The rope-Custom Rubber Parts.

Drawing tow

• 1 Newly-Color Plexiglass Sheet For Making Furnitures.Transparent Plexiglass Sheet For LED Display.

Crimping

• 2 Drawn tow is then fed into compression boxes,Plexiglass Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).Pure Raw Materials Color Extruded Acrylic Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Extruded Acrylic Sheet.Transparent PMMA Sheet For Making Face Shields.

Cutting

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

The Future

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