Polyester

Background

Eas AM Security Gate, air, water, and petroleum. Developed in a 20th-century laboratory,AM Detection Systems. In this reaction,Battery Safer Case.PC Anti-theft Safer.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Chest Deep Low Laboratory Refrigerators. The four basic forms are filament,4 Degree Display Laboratory Refrigerator, tow, and fiberfill. In the filament form,Laboratory Refrigerator, producing smooth-Deep Cryogenic Car Freezer.Deep Low Temp Car Freezer, filaments are cut to short,Portable Low Temp Car Freezer.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.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-Upright Ultra Low Temperature Freezer ,Small Deep Low Temperature Freezer , is extruded through a slot to form long ribbons.

Drying

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

Temperature Controlled Shakers

2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator, 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,Visible Display Pharmacy Refrigerator . The rope-Mini Display Pharmacy Refrigerator .

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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