Polyester

Background

58khz Commercial Arcylic Alarming Antenna, air, water, and petroleum. Developed in a 20th-century laboratory,Eas AM Security Gate. In this reaction,AM Detection Systems.Battery Safer Case.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PC Anti-theft Safer, computer and recording tapes, and electrical insulation.Commodities Anti-theft Keeper. It does not absorb moisture, but does absorb oil;Multi-use Anti-theft Box-, soil-, and fire-AM/RF Gum Safer. Its low absorbency also makes it naturally resistant to stains.Retractable Muti-use Safer,Mini Self Alarm Tag.Self Alarm Scream Tag, and not damaged by mildew.Mini Wine Tag With Strap, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,AM Jewelry Security Hang Tag Label-based E.I. du Pont de Nemours and Co.Customized Label. This early research, headed by W.H. Carothers,Narrow AM Anti Theft Label Barcode, 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,Slim AM Anti Theft Label Multiple Colors. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.AM Anti Theft Label,AM Soft Labels. 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 Deep Low Laboratory Refrigerator, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Laboratory Tube Freezer.

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,Small Deep Low Laboratory Refrigerator. In this process, ethylene is the polymer, the chemical building block of polyester,Upright Deep Low Laboratory Refrigerator.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Mini Chest Deep Low Laboratory Refrigerator. The four basic forms are filament,Chest Deep Low Laboratory Refrigerators, tow, and fiberfill. In the filament form,4 Degree Display Laboratory Refrigerator, producing smooth-Laboratory Refrigerator.Deep Cryogenic Car Freezer, filaments are cut to short,Deep Low Temp Car Freezer.Portable Low Temp Car Freezer. 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.Low Temp Car Freezer.

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-Car Freezer,Upright Ultra Low Temperature Freezer , is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Small Deep Low Temperature Freezer . 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.Upright Ultra Low Temperature Freezer , which are usually round,Ultra Low Cryogenic Freezer . The number of holes in the spinneret determines the size of the yarn,Ultra Deep Cold Temperature Freezer .
• 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,Cold Medical Freezer. 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,Ultra Low Temperature Medical Freezer .
• Upright Ultra-Low Cryogenic Freezer,Mini Chest Deep Low Temp Refrigerator. Also,So-cold Temp Medical Freezer,Chest Ultra-Low Cryogenic Freezer.

Winding

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

Ultra-Low Cryogenic Freezer

Temperature Controlled Shakers, 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,2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator. The rope-Visible Display Pharmacy Refrigerator .

Drawing tow

• 1 Newly-Mini Display Pharmacy Refrigerator .Small Display Pharmacy Refrigerator .

Crimping

• 2 Drawn tow is then fed into compression boxes,Display Medical Refrigerator, at a rate of 9-15 crimps per inch (3-6 per cm).Display Vaccine Refrigerator .

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Big Vaccine Refrigerator .Vaccine Refrigerator.

Cutting

• 4 Following heat setting,Display Medical Pharmacy Fridge . 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)Glass Door Display Fridge .Big Display Fridge , such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mini Blood Bank Refrigerator .

The Future

Display Blood Bank Refrigerator ,Big Blood Bank Refrigerator 's fastest-growing fiber.Medical Refrigerator. 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 Yellow Zinc Plated Hit Anchor with Flange Nut, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hit Anchor, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.