Polyester

Background

Big Display Fridge , air, water, and petroleum. Developed in a 20th-century laboratory,Mini Blood Bank Refrigerator . In this reaction,Display Blood Bank Refrigerator .Big Blood Bank Refrigerator .

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

History

In 1926,Carnon Steel Yellow Zinc Plated Express Nail-based E.I. du Pont de Nemours and Co.Mushroom Head Stainless Steel Pin. This early research, headed by W.H. Carothers,Stainless Steel Round Coupling Nut, 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 Hex Coupling Nut with Holes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Coupling Nut,Carbon Steel Yellow Zinc Plated Cut Anchor with 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.Stainless Steel Drop in Anchor with Knurling and Lip, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.

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 Bluewhite Zinc Plated Drop in Anchor with Knurling. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel Drop in Anchor Without Knurling.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Drop in Anchor. The four basic forms are filament,Stainless Steel Chemical Anchor with Hex Nut and Washer, tow, and fiberfill. In the filament form,Carbon Steel Zinc Plated Chemical Anchor, producing smooth-Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.Chemical Anchor, filaments are cut to short,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.Stainless Steel Sleeve Anchor with Fish Fins. 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.Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.

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-Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Protective Horse Rubber Boots. 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.Ribbed Rubber Horse Bell Boots, which are usually round,High Neck Bell Boots For Horse. The number of holes in the spinneret determines the size of the yarn,Horse Rubber Bell Boots.
• 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,Horse Rubber Parts. 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 Gaskets.
• Rubber Dust Cover,Gear Shift Lever Boot. Also,Auto Rubber Engine Mounting,Automotive Engine Rubber Mounting.

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 Bushings

Stabilizer Rubber Bushing, 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 To Metal Bonding Bushings. The rope-Rubber Bushing.

Drawing tow

• 1 Newly-Automotive Rubber Parts.Silicone Rubber Rollers.

Crimping

• 2 Drawn tow is then fed into compression boxes,Rubber Coated Rollers, at a rate of 9-15 crimps per inch (3-6 per cm).Non-Slip Rubber Feet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Anti Abrasion Rubber Bumpers.Rubber Bumpers.

Cutting

• 4 Following heat setting,Square Rubber Grommets. 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 Molded Rubber Parts.Compression Molding Custom Rubber Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Extrusion Molding Custom Rubber Parts.

The Future

Custom Neoprene Rubber Products,Custom Rubber Parts Anti-Slip Handle Grip's fastest-growing fiber.EPDM Rubber Sheets. 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,Rubber Parts, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Custom Rubber Parts. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Color Plexiglass Sheet For Making Furnitures, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.