Polyester

Background

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

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

History

In 1926,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut-based E.I. du Pont de Nemours and Co.Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer. This early research, headed by W.H. Carothers,Hit 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,Shield 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,Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook. 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.Hollow Wall Anchor, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Carnon Steel Yellow Zinc Plated Express Nail.

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,Mushroom Head Stainless Steel Pin. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel Round Coupling Nut.

The Manufacturing
Process

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

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 Chemical Anchor with Hex Nut and Washer,Carbon Steel Zinc Plated Chemical Anchor, is extruded through a slot to form long ribbons.

Drying

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

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 Bell Boots

Horse Rubber Parts, 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,Custom Rubber Gaskets. The rope-Rubber Dust Cover.

Drawing tow

• 1 Newly-Gear Shift Lever Boot.Auto Rubber Engine Mounting.

Crimping

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

Setting

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

Cutting

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

The Future

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