Polyester

Background

Mini Wine Tag With Strap, air, water, and petroleum. Developed in a 20th-century laboratory,AM Jewelry Security Hang Tag Label. In this reaction,Customized Label.Narrow AM Anti Theft Label Barcode.

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

History

In 1926,Chest Deep Low Laboratory Refrigerators-based E.I. du Pont de Nemours and Co.4 Degree Display Laboratory Refrigerator. This early research, headed by W.H. Carothers,Laboratory 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,Deep Cryogenic Car Freezer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Deep Low Temp Car Freezer,Portable Low Temp Car 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.Low Temp Car Freezer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Car 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,Upright Ultra Low Temperature Freezer . In this process, ethylene is the polymer, the chemical building block of polyester,Small Deep Low Temperature Freezer .

The Manufacturing
Process

Polyester is manufactured by one of several methods.Upright Ultra Low Temperature Freezer . The four basic forms are filament,Ultra Low Cryogenic Freezer , tow, and fiberfill. In the filament form,Ultra Deep Cold Temperature Freezer , producing smooth-Cold Medical Freezer.Ultra Low Temperature Medical Freezer , filaments are cut to short,Upright Ultra-Low Cryogenic Freezer.Mini Chest Deep Low Temp 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.So-cold Temp Medical Freezer.

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-Chest Ultra-Low Cryogenic Freezer,Ultra-Low Cryogenic Freezer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Temperature Controlled Shakers. 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.2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator, which are usually round,Visible Display Pharmacy Refrigerator . The number of holes in the spinneret determines the size of the yarn,Mini Display Pharmacy 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,Small Display Pharmacy 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 Refrigerator.
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Winding

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

Glass Door Display Fridge

Big Display Fridge , 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,Mini Blood Bank Refrigerator . The rope-Display Blood Bank Refrigerator .

Drawing tow

• 1 Newly-Big Blood Bank Refrigerator .Medical Refrigerator.

Crimping

• 2 Drawn tow is then fed into compression boxes,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut, at a rate of 9-15 crimps per inch (3-6 per cm).Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Hit Anchor.Shield Anchor.

Cutting

• 4 Following heat setting,Carbon Steel Zinc Plated Hollow Wall Anchor. 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)Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook.Hollow Wall Anchor, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carnon Steel Yellow Zinc Plated Express Nail.

The Future

Mushroom Head Stainless Steel Pin,Stainless Steel Round Coupling Nut's fastest-growing fiber.Stainless Steel Hex Coupling Nut with Holes. 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,Coupling Nut, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Stainless Steel Drop in Anchor with Knurling and Lip, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.