Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Display Medical Pharmacy Fridge

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

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.Hit Anchor.

Cutting

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

The Future

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