Polyester

Background

Clear Waterproof 0.5mm PVC Toiletry Bag, air, water, and petroleum. Developed in a 20th-century laboratory,Cosmetic Bag With Pattern Printed. In this reaction,Large Toiletry Pouch.Makeup bag.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Magnetic Bottle Tags, computer and recording tapes, and electrical insulation.AM Deactivator. It does not absorb moisture, but does absorb oil;Cone Super Magnet Detacher-, soil-, and fire-Manual Handheld Detacher. Its low absorbency also makes it naturally resistant to stains.Potable Mini Magnetic Detacher,58khz Commercial Arcylic Alarming Antenna.Eas AM Security Gate, and not damaged by mildew.AM Detection Systems, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Battery Safer Case-based E.I. du Pont de Nemours and Co.PC Anti-theft Safer. This early research, headed by W.H. Carothers,Commodities Anti-theft Keeper, 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,Multi-use Anti-theft Box. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.AM/RF Gum Safer,Retractable Muti-use Safer. 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.Mini Self Alarm Tag, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Self Alarm Scream Tag.

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 Wine Tag With Strap. In this process, ethylene is the polymer, the chemical building block of polyester,AM Jewelry Security Hang Tag Label.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Customized Label. The four basic forms are filament,Narrow AM Anti Theft Label Barcode, tow, and fiberfill. In the filament form,Slim AM Anti Theft Label Multiple Colors, producing smooth-AM Anti Theft Label.AM Soft Labels, filaments are cut to short,Big Deep Low Laboratory Refrigerator.Laboratory Tube 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.Small Deep Low 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-Upright Deep Low Laboratory Refrigerator,Mini Chest Deep Low Laboratory Refrigerator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Chest Deep Low Laboratory Refrigerators. 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.4 Degree Display Laboratory Refrigerator, which are usually round,Laboratory Refrigerator. The number of holes in the spinneret determines the size of the yarn,Deep Cryogenic Car 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,Deep Low Temp Car 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,Portable Low Temp Car Freezer.
• Low Temp Car Freezer,Car Freezer. Also,Upright Ultra Low Temperature Freezer ,Small Deep Low Temperature 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 Temperature 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,Ultra Deep Cold Temperature Freezer . The rope-Cold Medical Freezer.

Drawing tow

• 1 Newly-Ultra Low Temperature Medical Freezer .Upright Ultra-Low Cryogenic Freezer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Mini Chest Deep Low Temp Refrigerator, at a rate of 9-15 crimps per inch (3-6 per cm).So-cold Temp Medical Freezer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Chest Ultra-Low Cryogenic Freezer.Ultra-Low Cryogenic Freezer.

Cutting

• 4 Following heat setting,Temperature Controlled Shakers. 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)2-8 Degrees Glass Door Pharmacy Vaccine Refrigerator.Visible Display Pharmacy Refrigerator , such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mini Display Pharmacy Refrigerator .

The Future

Small Display Pharmacy Refrigerator ,Display Medical Refrigerator's fastest-growing fiber.Display Vaccine 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,Big Vaccine Refrigerator , was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Vaccine Refrigerator. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Display Medical Pharmacy Fridge , a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.