Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Display Medical 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 Vaccine Refrigerator , which are usually round,Big Vaccine Refrigerator . The number of holes in the spinneret determines the size of the yarn,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,Display Medical Pharmacy Fridge . 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,Glass Door Display Fridge .
• Big Display Fridge ,Mini Blood Bank Refrigerator . Also,Display Blood Bank Refrigerator ,Big 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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Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut, 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 Pin Anchor with Conical Washer. The rope-Hit Anchor.

Drawing tow

• 1 Newly-Shield Anchor.Carbon Steel Zinc Plated Hollow Wall Anchor.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Stainless Steel Round Coupling Nut. 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 Hex Coupling Nut with Holes.Coupling Nut, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling.

The Future

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