Polyester

Background

AM Detection Systems, air, water, and petroleum. Developed in a 20th-century laboratory,Battery Safer Case. In this reaction,PC Anti-theft Safer.Commodities Anti-theft Keeper.

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Ultra Low Cryogenic 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.Ultra Deep Cold Temperature Freezer , which are usually round,Cold Medical Freezer. The number of holes in the spinneret determines the size of the yarn,Ultra Low Temperature Medical 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 Cryogenic 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,Mini Chest Deep Low Temp Refrigerator.
• So-cold Temp Medical Freezer,Chest Ultra-Low Cryogenic Freezer. Also,Ultra-Low Cryogenic Freezer,Temperature Controlled Shakers.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator

Visible Display Pharmacy 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,Mini Display Pharmacy Refrigerator . The rope-Small Display Pharmacy Refrigerator .

Drawing tow

• 1 Newly-Display Medical Refrigerator.Display Vaccine Refrigerator .

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Display Medical Pharmacy Fridge .Glass Door Display Fridge .

Cutting

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

The Future

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