Polyester

Background

Small Deep Low Temperature Freezer , air, water, and petroleum. Developed in a 20th-century laboratory,Upright Ultra Low Temperature Freezer . In this reaction,Ultra Low Cryogenic Freezer .Ultra Deep Cold Temperature Freezer .

Polyester is used in the manufacture of many products, including clothing, home furnishings,Cold Medical Freezer, computer and recording tapes, and electrical insulation.Ultra Low Temperature Medical Freezer . It does not absorb moisture, but does absorb oil;Upright Ultra-Low Cryogenic Freezer-, soil-, and fire-Mini Chest Deep Low Temp Refrigerator. Its low absorbency also makes it naturally resistant to stains.So-cold Temp Medical Freezer,Chest Ultra-Low Cryogenic Freezer.Ultra-Low Cryogenic Freezer, and not damaged by mildew.Temperature Controlled Shakers, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator-based E.I. du Pont de Nemours and Co.Visible Display Pharmacy Refrigerator . This early research, headed by W.H. Carothers,Mini Display Pharmacy 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,Small Display Pharmacy Refrigerator . The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Display Medical Refrigerator,Display Vaccine 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.Big Vaccine Refrigerator , though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Vaccine 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,Display Medical Pharmacy Fridge . In this process, ethylene is the polymer, the chemical building block of polyester,Glass Door Display Fridge .

The Manufacturing
Process

Polyester is manufactured by one of several methods.Big Display Fridge . The four basic forms are filament,Mini Blood Bank Refrigerator , tow, and fiberfill. In the filament form,Display Blood Bank Refrigerator , producing smooth-Big Blood Bank Refrigerator .Medical Refrigerator, filaments are cut to short,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut.Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer. 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.Hit 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-Shield Anchor,Carbon Steel Zinc Plated Hollow Wall Anchor, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook. 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.Hollow Wall Anchor, which are usually round,Carnon Steel Yellow Zinc Plated Express Nail. The number of holes in the spinneret determines the size of the yarn,Mushroom Head Stainless Steel Pin.
• 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 Round Coupling 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,Stainless Steel Hex Coupling Nut with Holes.
• Coupling Nut,Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling. Also,Stainless Steel Drop in Anchor with Knurling and Lip,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.

Winding

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

Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling

Stainless Steel Drop in Anchor Without Knurling, 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,Drop in Anchor. The rope-Stainless Steel Chemical Anchor with Hex Nut and Washer.

Drawing tow

• 1 Newly-Carbon Steel Zinc Plated Chemical Anchor.Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.

Crimping

• 2 Drawn tow is then fed into compression boxes,Chemical Anchor, at a rate of 9-15 crimps per inch (3-6 per cm).Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Stainless Steel Sleeve Anchor with Fish Fins.Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.

Cutting

• 4 Following heat setting,Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut. 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)Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip.Protective Horse Rubber Boots, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Ribbed Rubber Horse Bell Boots.

The Future

High Neck Bell Boots For Horse,Horse Rubber Bell Boots's fastest-growing fiber.Horse Rubber Parts. 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 Rubber Gaskets, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Rubber Dust Cover. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Gear Shift Lever Boot, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.