Polyester

Background

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

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

History

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

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 Chemical Anchor with Hex Nut and Washer. In this process, ethylene is the polymer, the chemical building block of polyester,Carbon Steel Zinc Plated Chemical Anchor.

The Manufacturing
Process

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

Drying

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

Rubber Bushing

Automotive 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,Silicone Rubber Rollers. The rope-Rubber Coated Rollers.

Drawing tow

• 1 Newly-Non-Slip Rubber Feet.Anti Abrasion Rubber Bumpers.

Crimping

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

Setting

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

Cutting

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

The Future

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