Polyester

Background

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

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

History

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

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,Stainless Steel Round Coupling Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel Hex Coupling Nut with Holes.

The Manufacturing
Process

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

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-Carbon Steel Zinc Plated Chemical Anchor,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor, is extruded through a slot to form long ribbons.

Drying

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

Horse Rubber Parts

Custom Rubber Gaskets, 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,Rubber Dust Cover. The rope-Gear Shift Lever Boot.

Drawing tow

• 1 Newly-Auto Rubber Engine Mounting.Automotive Engine Rubber Mounting.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Automotive 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)Silicone Rubber Rollers.Rubber Coated Rollers, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Non-Slip Rubber Feet.

The Future

Anti Abrasion Rubber Bumpers,Rubber Bumpers's fastest-growing fiber.Square Rubber Grommets. 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,Custom Molded Rubber Parts, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Compression Molding Custom Rubber Parts. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Extrusion Molding Custom 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.