Polyester

Background

Magnetic Bottle Tags, air, water, and petroleum. Developed in a 20th-century laboratory,AM Deactivator. In this reaction,Cone Super Magnet Detacher.Manual Handheld Detacher.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Potable Mini Magnetic Detacher, computer and recording tapes, and electrical insulation.58khz Commercial Arcylic Alarming Antenna. It does not absorb moisture, but does absorb oil;Eas AM Security Gate-, soil-, and fire-AM Detection Systems. Its low absorbency also makes it naturally resistant to stains.Battery Safer Case,PC Anti-theft Safer.Commodities Anti-theft Keeper, and not damaged by mildew.Multi-use Anti-theft Box, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,AM/RF Gum Safer-based E.I. du Pont de Nemours and Co.Retractable Muti-use Safer. This early research, headed by W.H. Carothers,Mini Self Alarm Tag, 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,Self Alarm Scream Tag. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Mini Wine Tag With Strap,AM Jewelry Security Hang Tag Label. 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.Customized Label, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Narrow AM Anti Theft Label Barcode.

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,Slim AM Anti Theft Label Multiple Colors. In this process, ethylene is the polymer, the chemical building block of polyester,AM Anti Theft Label.

The Manufacturing
Process

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

Drying

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

Upright Ultra-Low Cryogenic Freezer, 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,Mini Chest Deep Low Temp Refrigerator. The rope-So-cold Temp Medical Freezer.

Drawing tow

• 1 Newly-Chest Ultra-Low Cryogenic Freezer.Ultra-Low Cryogenic Freezer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Temperature Controlled Shakers, at a rate of 9-15 crimps per inch (3-6 per cm).2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.

Setting

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

Cutting

• 4 Following heat setting,Small Display Pharmacy Refrigerator . 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)Display Medical Refrigerator.Display Vaccine Refrigerator , such ascarpet,polyester filaments are cut into 6 inch (15 cm)Big Vaccine Refrigerator .

The Future

Vaccine Refrigerator,Display Medical Pharmacy Fridge 's fastest-growing fiber.Glass Door Display Fridge . 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,Big Display Fridge , was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Mini Blood Bank Refrigerator . Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Display Blood Bank Refrigerator , a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.