Polyester

Background

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

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

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.AM Anti Theft Label. The four basic forms are filament,AM Soft Labels, tow, and fiberfill. In the filament form,Big Deep Low Laboratory Refrigerator, producing smooth-Laboratory Tube Freezer.Small Deep Low Laboratory Refrigerator, filaments are cut to short,Upright Deep Low Laboratory Refrigerator.Mini Chest Deep Low Laboratory 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.Chest Deep Low Laboratory Refrigerators.

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-4 Degree Display Laboratory Refrigerator,Laboratory Refrigerator, is extruded through a slot to form long ribbons.

Drying

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

Cold Medical Freezer

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

Drawing tow

• 1 Newly-So-cold Temp Medical Freezer.Chest Ultra-Low Cryogenic Freezer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Ultra-Low Cryogenic Freezer, at a rate of 9-15 crimps per inch (3-6 per cm).Temperature Controlled Shakers.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.Visible Display Pharmacy Refrigerator .

Cutting

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

The Future

Big Vaccine Refrigerator ,Vaccine Refrigerator's fastest-growing fiber.Display Medical Pharmacy 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,Glass Door Display Fridge , was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Big Display Fridge . Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Mini 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.