Polyester

Background

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

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

History

In 1926,Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook-based E.I. du Pont de Nemours and Co.Hollow Wall Anchor. This early research, headed by W.H. Carothers,Carnon Steel Yellow Zinc Plated Express Nail, 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,Mushroom Head Stainless Steel Pin. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Stainless Steel Round Coupling Nut,Stainless Steel Hex Coupling Nut with Holes. 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.Coupling Nut, 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 Cut 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 with Knurling and Lip. In this process, ethylene is the polymer, the chemical building block of polyester,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling. The four basic forms are filament,Stainless Steel Drop in Anchor Without Knurling, tow, and fiberfill. In the filament form,Drop in Anchor, producing smooth-Stainless Steel Chemical Anchor with Hex Nut and Washer.Carbon Steel Zinc Plated Chemical Anchor, filaments are cut to short,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.Chemical Anchor. 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.Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.

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-Stainless Steel Sleeve Anchor with Fish Fins,Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut. 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.Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip, which are usually round,Protective Horse Rubber Boots. The number of holes in the spinneret determines the size of the yarn,Ribbed Rubber Horse 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,High Neck Bell Boots For Horse. 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,Horse Rubber Bell Boots.
• Horse Rubber Parts,Custom Rubber Gaskets. Also,Rubber Dust Cover,Gear Shift Lever Boot.

Winding

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

Auto Rubber Engine Mounting

Automotive Engine Rubber Mounting, 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,Automotive Rubber Bushings. The rope-Stabilizer Rubber Bushing.

Drawing tow

• 1 Newly-Rubber To Metal Bonding Bushings.Rubber Bushing.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Rubber Coated Rollers.Non-Slip Rubber Feet.

Cutting

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

The Future

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