Polyester

Background

Potable Mini Magnetic Detacher, air, water, and petroleum. Developed in a 20th-century laboratory,58khz Commercial Arcylic Alarming Antenna. In this reaction,Eas AM Security Gate.AM Detection Systems.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Upright Deep Low Laboratory Refrigerator. The four basic forms are filament,Mini Chest Deep Low Laboratory Refrigerator, tow, and fiberfill. In the filament form,Chest Deep Low Laboratory Refrigerators, producing smooth-4 Degree Display Laboratory Refrigerator.Laboratory Refrigerator, filaments are cut to short,Deep Cryogenic Car Freezer.Deep 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.Portable Low Temp 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-Low Temp Car Freezer,Car 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.Small Deep Low Temperature Freezer , which are usually round,Upright Ultra Low Temperature Freezer . The number of holes in the spinneret determines the size of the yarn,Ultra Low Cryogenic 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 Deep Cold 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,Cold Medical Freezer.
• Ultra Low Temperature Medical Freezer ,Upright Ultra-Low Cryogenic Freezer. Also,Mini Chest Deep Low Temp Refrigerator,So-cold Temp 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.

Chest Ultra-Low Cryogenic Freezer

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,Temperature Controlled Shakers. The rope-2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.

Drawing tow

• 1 Newly-Visible Display Pharmacy Refrigerator .Mini Display Pharmacy Refrigerator .

Crimping

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

Setting

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

Cutting

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

The Future

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