Polyester

Background

Commodities Anti-theft Keeper, air, water, and petroleum. Developed in a 20th-century laboratory,Multi-use Anti-theft Box. In this reaction,AM/RF Gum Safer.Retractable Muti-use Safer.

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

History

In 1926,AM Soft Labels-based E.I. du Pont de Nemours and Co.Big Deep Low Laboratory Refrigerator. This early research, headed by W.H. Carothers,Laboratory Tube Freezer, 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,Small Deep Low Laboratory Refrigerator. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Upright Deep Low Laboratory Refrigerator,Mini Chest Deep Low Laboratory Refrigerator. 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.Chest Deep Low Laboratory Refrigerators, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.4 Degree Display 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 Refrigerator. In this process, ethylene is the polymer, the chemical building block of polyester,Deep Cryogenic Car Freezer.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Ultra Low Temperature Medical 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.Upright Ultra-Low Cryogenic Freezer, which are usually round,Mini Chest Deep Low Temp Refrigerator. The number of holes in the spinneret determines the size of the yarn,So-cold Temp 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,Chest 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,Ultra-Low Cryogenic Freezer.
• Temperature Controlled Shakers,2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator. Also,Visible Display Pharmacy Refrigerator ,Mini Display Pharmacy Refrigerator .

Winding

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

Small Display Pharmacy Refrigerator

Display Medical 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,Display Vaccine Refrigerator . The rope-Big Vaccine Refrigerator .

Drawing tow

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

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Big Blood Bank 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)Medical Refrigerator.Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer.

The Future

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