Polyester

Background

AM/RF Gum Safer, air, water, and petroleum. Developed in a 20th-century laboratory,Retractable Muti-use Safer. In this reaction,Mini Self Alarm Tag.Self Alarm Scream Tag.

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

History

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

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,Deep Low Temp Car Freezer. In this process, ethylene is the polymer, the chemical building block of polyester,Portable Low Temp Car Freezer.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Mini Chest Deep Low Temp 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.So-cold Temp Medical Freezer, which are usually round,Chest Ultra-Low Cryogenic 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,Temperature Controlled Shakers. 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,2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.
• Visible Display Pharmacy Refrigerator ,Mini Display Pharmacy Refrigerator . Also,Small Display Pharmacy Refrigerator ,Display Medical 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.

Display Vaccine Refrigerator

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

Drawing tow

• 1 Newly-Glass Door Display Fridge .Big Display Fridge .

Crimping

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

Setting

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

Cutting

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

The Future

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