Polyester

Background

Carnon Steel Yellow Zinc Plated Express Nail, air, water, and petroleum. Developed in a 20th-century laboratory,Mushroom Head Stainless Steel Pin. In this reaction,Stainless Steel Round Coupling Nut.Stainless Steel Hex Coupling Nut with Holes.

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

History

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

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

The Manufacturing
Process

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

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-Automotive Rubber Bushings,Stabilizer Rubber Bushing, is extruded through a slot to form long ribbons.

Drying

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

Compression Molding Custom Rubber Parts

Extrusion Molding Custom Rubber Parts, 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,Custom Neoprene Rubber Products. The rope-Custom Rubber Parts Anti-Slip Handle Grip.

Drawing tow

• 1 Newly-EPDM Rubber Sheets.Rubber Parts.

Crimping

• 2 Drawn tow is then fed into compression boxes,Custom Rubber Parts, at a rate of 9-15 crimps per inch (3-6 per cm).Color Plexiglass Sheet For Making Furnitures.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Transparent Plexiglass Sheet For LED Display.Plexiglass Sheet.

Cutting

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

The Future

Color PMMA Sheet,Color Cast Acrylic Sheet For Making Luminous Characters's fastest-growing fiber.Red 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,Grade A Color Cast Acrylic Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Color 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 Used For Building Materials, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.