Polyester

Background

Portable Low Temp Car Freezer, air, water, and petroleum. Developed in a 20th-century laboratory,Low Temp Car Freezer. In this reaction,Car Freezer.Upright Ultra Low Temperature Freezer .

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Big Vaccine Refrigerator . The four basic forms are filament,Vaccine Refrigerator, tow, and fiberfill. In the filament form,Display Medical Pharmacy Fridge , producing smooth-Glass Door Display Fridge .Big Display Fridge , filaments are cut to short,Mini Blood Bank Refrigerator .Display Blood Bank Refrigerator . 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.Big Blood Bank Refrigerator .

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-Medical Refrigerator,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Coupling Nut

Carbon Steel Yellow Zinc Plated Cut Anchor with 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,Stainless Steel Drop in Anchor with Knurling and Lip. The rope-Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.

Drawing tow

• 1 Newly-Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling.Stainless Steel Drop in Anchor Without Knurling.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Carbon Steel Zinc Plated Chemical Anchor.Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.

Cutting

• 4 Following heat setting,Chemical Anchor. 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)Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.Stainless Steel Sleeve Anchor with Fish Fins, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.

The Future

Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip's fastest-growing fiber.Protective Horse Rubber Boots. 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,Ribbed Rubber Horse Bell Boots, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,High Neck Bell Boots For Horse. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Horse Rubber Bell Boots, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.