Polyester

Background

2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator, air, water, and petroleum. Developed in a 20th-century laboratory,Visible Display Pharmacy Refrigerator . In this reaction,Mini Display Pharmacy Refrigerator .Small Display Pharmacy Refrigerator .

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

History

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

The Manufacturing
Process

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

Drying

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

Winding

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

Protective Horse Rubber Boots

Ribbed Rubber Horse 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,High Neck Bell Boots For Horse. The rope-Horse Rubber Bell Boots.

Drawing tow

• 1 Newly-Horse Rubber Parts.Custom Rubber Gaskets.

Crimping

• 2 Drawn tow is then fed into compression boxes,Rubber Dust Cover, at a rate of 9-15 crimps per inch (3-6 per cm).Gear Shift Lever Boot.

Setting

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

Cutting

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

The Future

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