Polyester

Background

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

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

History

In 1926,Big Vaccine Refrigerator -based E.I. du Pont de Nemours and Co.Vaccine Refrigerator. This early research, headed by W.H. Carothers,Display Medical Pharmacy Fridge , 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,Glass Door Display Fridge . The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Big Display Fridge ,Mini Blood Bank Refrigerator . 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.Display Blood Bank Refrigerator , though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Big 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,Medical Refrigerator. In this process, ethylene is the polymer, the chemical building block of polyester,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut.

The Manufacturing
Process

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

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-Stainless Steel Round Coupling Nut,Stainless Steel Hex Coupling Nut with Holes, is extruded through a slot to form long ribbons.

Drying

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

Chemical Anchor

Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer, 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 Fish Fins. The rope-Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.

Drawing tow

• 1 Newly-Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut.Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip.

Crimping

• 2 Drawn tow is then fed into compression boxes,Protective Horse Rubber Boots, at a rate of 9-15 crimps per inch (3-6 per cm).Ribbed Rubber Horse Bell Boots.

Setting

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

Cutting

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

The Future

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