Polyester

Background

Mini Display Pharmacy Refrigerator , air, water, and petroleum. Developed in a 20th-century laboratory,Small Display Pharmacy Refrigerator . In this reaction,Display Medical Refrigerator.Display Vaccine Refrigerator .

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

History

In 1926,Medical Refrigerator-based E.I. du Pont de Nemours and Co.Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut. This early research, headed by W.H. Carothers,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer, 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,Hit Anchor. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Shield Anchor,Carbon Steel Zinc Plated Hollow Wall Anchor. 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.Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hollow Wall Anchor.

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,Carnon Steel Yellow Zinc Plated Express Nail. In this process, ethylene is the polymer, the chemical building block of polyester,Mushroom Head Stainless Steel Pin.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Stainless Steel Round Coupling Nut. The four basic forms are filament,Stainless Steel Hex Coupling Nut with Holes, tow, and fiberfill. In the filament form,Coupling Nut, producing smooth-Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling.Stainless Steel Drop in Anchor with Knurling and Lip, filaments are cut to short,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling. 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.Stainless Steel Drop in Anchor Without Knurling.

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-Drop in Anchor,Stainless Steel Chemical Anchor with Hex Nut and Washer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Carbon Steel Zinc Plated Chemical Anchor. 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 Hot Dip Galvanized HDG Chemical Anchor, which are usually round,Chemical Anchor. The number of holes in the spinneret determines the size of the yarn,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.
• 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,Stainless Steel Sleeve Anchor with Fish Fins. 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,Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.
• Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip. Also,Protective Horse Rubber Boots,Ribbed Rubber Horse Bell Boots.

Winding

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

High Neck Bell Boots For Horse

Horse Rubber Bell Boots, 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,Horse Rubber Parts. The rope-Custom Rubber Gaskets.

Drawing tow

• 1 Newly-Rubber Dust Cover.Gear Shift Lever Boot.

Crimping

• 2 Drawn tow is then fed into compression boxes,Auto Rubber Engine Mounting, at a rate of 9-15 crimps per inch (3-6 per cm).Automotive Engine Rubber Mounting.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Automotive Rubber Bushings.Stabilizer Rubber Bushing.

Cutting

• 4 Following heat setting,Rubber To Metal Bonding Bushings. 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)Rubber Bushing.Automotive Rubber Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Silicone Rubber Rollers.

The Future

Rubber Coated Rollers,Non-Slip Rubber Feet's fastest-growing fiber.Anti Abrasion Rubber Bumpers. 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,Rubber Bumpers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Square Rubber Grommets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Custom Molded Rubber Parts, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.