Polyester

Background

Medical Refrigerator, air, water, and petroleum. Developed in a 20th-century laboratory,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut. In this reaction,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.Hit Anchor.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Shield Anchor, computer and recording tapes, and electrical insulation.Carbon Steel Zinc Plated Hollow Wall Anchor. It does not absorb moisture, but does absorb oil;Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook-, soil-, and fire-Hollow Wall Anchor. Its low absorbency also makes it naturally resistant to stains.Carnon Steel Yellow Zinc Plated Express Nail,Mushroom Head Stainless Steel Pin.Stainless Steel Round Coupling Nut, and not damaged by mildew.Stainless Steel Hex Coupling Nut with Holes, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Coupling Nut-based E.I. du Pont de Nemours and Co.Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling. This early research, headed by W.H. Carothers,Stainless Steel Drop in Anchor with Knurling and Lip, 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 Yellow Zinc Plated Drop in Anchor with Knurling. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling,Stainless Steel Drop in Anchor Without Knurling. 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.Drop in Anchor, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Stainless Steel Chemical Anchor with Hex Nut and Washer.

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,Carbon Steel Zinc Plated Chemical Anchor. In this process, ethylene is the polymer, the chemical building block of polyester,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Chemical Anchor. The four basic forms are filament,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer, tow, and fiberfill. In the filament form,Stainless Steel Sleeve Anchor with Fish Fins, producing smooth-Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut, filaments are cut to short,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip.Protective Horse Rubber Boots. 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.Ribbed Rubber Horse Bell Boots.

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-High Neck Bell Boots For Horse,Horse Rubber Bell Boots, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Horse 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.Custom Rubber Gaskets, which are usually round,Rubber Dust Cover. The number of holes in the spinneret determines the size of the yarn,Gear Shift Lever Boot.
• 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,Auto Rubber Engine Mounting. 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,Automotive Engine Rubber Mounting.
• Automotive Rubber Bushings,Stabilizer Rubber Bushing. Also,Rubber To Metal Bonding Bushings,Rubber Bushing.

Winding

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

Automotive Rubber Parts

Silicone Rubber Rollers, 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 Coated Rollers. The rope-Non-Slip Rubber Feet.

Drawing tow

• 1 Newly-Anti Abrasion Rubber Bumpers.Rubber Bumpers.

Crimping

• 2 Drawn tow is then fed into compression boxes,Square Rubber Grommets, at a rate of 9-15 crimps per inch (3-6 per cm).Custom Molded Rubber Parts.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Compression Molding Custom Rubber Parts.Extrusion Molding Custom Rubber Parts.

Cutting

• 4 Following heat setting,Custom Neoprene Rubber Products. 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)Custom Rubber Parts Anti-Slip Handle Grip.EPDM Rubber Sheets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Rubber Parts.

The Future

Custom Rubber Parts,Color Plexiglass Sheet For Making Furnitures's fastest-growing fiber.Transparent Plexiglass Sheet For LED Display. 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,Plexiglass Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Pure Raw Materials Color Extruded Acrylic Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Extruded 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.