Polyester

Background

Slim AM Anti Theft Label Multiple Colors, air, water, and petroleum. Developed in a 20th-century laboratory,AM Anti Theft Label. In this reaction,AM Soft Labels.Big Deep Low Laboratory Refrigerator.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Laboratory Tube Freezer, computer and recording tapes, and electrical insulation.Small Deep Low Laboratory Refrigerator. It does not absorb moisture, but does absorb oil;Upright Deep Low Laboratory Refrigerator-, soil-, and fire-Mini Chest Deep Low Laboratory Refrigerator. Its low absorbency also makes it naturally resistant to stains.Chest Deep Low Laboratory Refrigerators,4 Degree Display Laboratory Refrigerator.Laboratory Refrigerator, and not damaged by mildew.Deep Cryogenic Car Freezer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Deep Low Temp Car Freezer-based E.I. du Pont de Nemours and Co.Portable Low Temp Car Freezer. This early research, headed by W.H. Carothers,Low Temp Car Freezer, 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,Car Freezer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Upright Ultra Low Temperature Freezer ,Small Deep Low Temperature Freezer . 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.Upright Ultra Low Temperature Freezer , though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Ultra Low Cryogenic Freezer .

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,Ultra Deep Cold Temperature Freezer . In this process, ethylene is the polymer, the chemical building block of polyester,Cold Medical Freezer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Ultra Low Temperature Medical Freezer . The four basic forms are filament,Upright Ultra-Low Cryogenic Freezer, tow, and fiberfill. In the filament form,Mini Chest Deep Low Temp Refrigerator, producing smooth-So-cold Temp Medical Freezer.Chest Ultra-Low Cryogenic Freezer, filaments are cut to short,Ultra-Low Cryogenic Freezer.Temperature Controlled Shakers. 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.2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.

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-Visible Display Pharmacy Refrigerator ,Mini Display Pharmacy Refrigerator , is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Small Display Pharmacy Refrigerator . 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.Display Medical Refrigerator, which are usually round,Display Vaccine Refrigerator . The number of holes in the spinneret determines the size of the yarn,Big Vaccine Refrigerator .
• 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,Vaccine Refrigerator. 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,Display Medical Pharmacy Fridge .
• Glass Door Display Fridge ,Big Display Fridge . Also,Mini Blood Bank Refrigerator ,Display Blood Bank Refrigerator .

Winding

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

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Medical Refrigerator, 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,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut. The rope-Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.

Drawing tow

• 1 Newly-Hit Anchor.Shield Anchor.

Crimping

• 2 Drawn tow is then fed into compression boxes,Carbon Steel Zinc Plated Hollow Wall Anchor, at a rate of 9-15 crimps per inch (3-6 per cm).Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hollow Wall Anchor.Carnon Steel Yellow Zinc Plated Express Nail.

Cutting

• 4 Following heat setting,Mushroom Head Stainless Steel Pin. 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)Stainless Steel Round Coupling Nut.Stainless Steel Hex Coupling Nut with Holes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Coupling Nut.

The Future

Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling,Stainless Steel Drop in Anchor with Knurling and Lip's fastest-growing fiber.Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling. 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,Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Stainless Steel Drop in Anchor Without Knurling. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Drop in Anchor, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.