Polyester

Background

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

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

History

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

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,AM Anti Theft Label. In this process, ethylene is the polymer, the chemical building block of polyester,AM Soft Labels.

The Manufacturing
Process

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

Drying

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

Upright Ultra-Low Cryogenic Freezer

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

Drawing tow

• 1 Newly-Ultra-Low Cryogenic Freezer.Temperature Controlled Shakers.

Crimping

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

Setting

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

Cutting

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

The Future

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