Polyester

Background

Large Toiletry Pouch, air, water, and petroleum. Developed in a 20th-century laboratory,Makeup bag. In this reaction,Magnetic Bottle Tags.AM Deactivator.

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

History

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

The Manufacturing
Process

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

Drying

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

Ultra Deep Cold Temperature Freezer

Cold 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,Ultra Low Temperature Medical Freezer . The rope-Upright Ultra-Low Cryogenic Freezer.

Drawing tow

• 1 Newly-Mini Chest Deep Low Temp Refrigerator.So-cold Temp Medical Freezer.

Crimping

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

Setting

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

Cutting

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

The Future

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