Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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 Zinc Plated Wedge Anchor with Stainless Clip,Protective Horse Rubber Boots, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Stabilizer Rubber Bushing

Rubber To Metal Bonding Bushings, 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 Bushing. The rope-Automotive Rubber Parts.

Drawing tow

• 1 Newly-Silicone Rubber Rollers.Rubber Coated Rollers.

Crimping

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

Setting

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

Cutting

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

The Future

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