Polyester

Background

Ultra Low Temperature Medical Freezer , air, water, and petroleum. Developed in a 20th-century laboratory,Upright Ultra-Low Cryogenic Freezer. In this reaction,Mini Chest Deep Low Temp Refrigerator.So-cold Temp Medical Freezer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Chest Ultra-Low Cryogenic Freezer, computer and recording tapes, and electrical insulation.Ultra-Low Cryogenic Freezer. It does not absorb moisture, but does absorb oil;Temperature Controlled Shakers-, soil-, and fire-2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator. Its low absorbency also makes it naturally resistant to stains.Visible Display Pharmacy Refrigerator ,Mini Display Pharmacy Refrigerator .Small Display Pharmacy Refrigerator , and not damaged by mildew.Display Medical Refrigerator, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Display Vaccine Refrigerator -based E.I. du Pont de Nemours and Co.Big Vaccine Refrigerator . This early research, headed by W.H. Carothers,Vaccine Refrigerator, 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,Display Medical Pharmacy Fridge . The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Glass Door Display Fridge ,Big Display Fridge . 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.Mini Blood Bank Refrigerator , though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Display Blood Bank Refrigerator .

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,Big Blood Bank Refrigerator . In this process, ethylene is the polymer, the chemical building block of polyester,Medical Refrigerator.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut. The four basic forms are filament,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer, tow, and fiberfill. In the filament form,Hit Anchor, producing smooth-Shield Anchor.Carbon Steel Zinc Plated Hollow Wall Anchor, filaments are cut to short,Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook.Hollow Wall 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.Carnon Steel Yellow Zinc Plated Express Nail.

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-Mushroom Head Stainless Steel Pin,Stainless Steel Round Coupling Nut, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Stainless Steel Hex Coupling Nut with Holes. 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.Coupling Nut, which are usually round,Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling. The number of holes in the spinneret determines the size of the yarn,Stainless Steel Drop in Anchor with Knurling and Lip.
• 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,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling. 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,Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling.
• Stainless Steel Drop in Anchor Without Knurling,Drop in Anchor. Also,Stainless Steel Chemical Anchor with Hex Nut and Washer,Carbon Steel Zinc Plated Chemical Anchor.

Winding

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

Carbon Steel Hot Dip Galvanized HDG Chemical Anchor

Chemical Anchor, 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,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer. The rope-Stainless Steel Sleeve Anchor with Fish Fins.

Drawing tow

• 1 Newly-Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut.

Crimping

• 2 Drawn tow is then fed into compression boxes,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip, at a rate of 9-15 crimps per inch (3-6 per cm).Protective Horse Rubber Boots.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Ribbed Rubber Horse Bell Boots.High Neck Bell Boots For Horse.

Cutting

• 4 Following heat setting,Horse Rubber Bell Boots. 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)Horse Rubber Parts.Custom Rubber Gaskets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Rubber Dust Cover.

The Future

Gear Shift Lever Boot,Auto Rubber Engine Mounting's fastest-growing fiber.Automotive Engine Rubber Mounting. 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,Automotive Rubber Bushings, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Stabilizer Rubber Bushing. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Rubber To Metal Bonding Bushings, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.