Polyester

Background

Laboratory Refrigerator, air, water, and petroleum. Developed in a 20th-century laboratory,Deep Cryogenic Car Freezer. In this reaction,Deep Low Temp Car Freezer.Portable Low Temp Car Freezer.

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

History

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

The Manufacturing
Process

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

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-Mini Blood Bank Refrigerator ,Display Blood Bank Refrigerator , is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Big Blood Bank Refrigerator . 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.Medical Refrigerator, which are usually round,Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut. The number of holes in the spinneret determines the size of the yarn,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.
• 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,Hit 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,Shield Anchor.
• Carbon Steel Zinc Plated Hollow Wall Anchor,Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook. Also,Hollow Wall Anchor,Carnon Steel Yellow Zinc Plated Express Nail.

Winding

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

Mushroom Head Stainless Steel Pin

Stainless Steel Round Coupling Nut, 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 Hex Coupling Nut with Holes. The rope-Coupling Nut.

Drawing tow

• 1 Newly-Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling.Stainless Steel Drop in Anchor with Knurling and Lip.

Crimping

• 2 Drawn tow is then fed into compression boxes,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling, at a rate of 9-15 crimps per inch (3-6 per cm).Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Stainless Steel Drop in Anchor Without Knurling.Drop in Anchor.

Cutting

• 4 Following heat setting,Stainless Steel Chemical Anchor with Hex Nut and Washer. 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 Chemical Anchor.Carbon Steel Hot Dip Galvanized HDG Chemical Anchor, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Chemical Anchor.

The Future

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