Polyester

Background

PVC Free Foam Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Colors PVC Foam Board. In this reaction,Low Density PVC Free Foam Board.PVC Foam Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Low Noise Plastic Granulator, computer and recording tapes, and electrical insulation.Mid Speed Granulator. It does not absorb moisture, but does absorb oil;Middle Speed Plastic Granulator-, soil-, and fire-Low Speed Granulators. Its low absorbency also makes it naturally resistant to stains.Screw Color Mixer,Color Dose Mixer.Central Chiller - Dual Machine, and not damaged by mildew.Central Chiller -Single, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hot Water Temperature Control Modules-based E.I. du Pont de Nemours and Co.Dual Mold Temperature Controller-Water Based. This early research, headed by W.H. Carothers,Mold Temperature Controller -Water Based, 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,Mold Temperature Controller - Oil Based. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.One Piece Complete Autoloader,Detachable Type Autoloader. 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.Cabinet Dryer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Mold Dehumidifying Dryer.

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,Dehumidification Drying Feeder. In this process, ethylene is the polymer, the chemical building block of polyester,Dehumidifier.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Low Speed Granulators. The four basic forms are filament,Low Noise Granulators, tow, and fiberfill. In the filament form,Screw Color Mixer, producing smooth-European Type Hopper Dryers.Dehumidifier, filaments are cut to short,Central Material Handling System.Dehumidifying and Drying Machine. 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.NZK Vacuum Dryer.

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-Hopper Dryer,Low Noise Plastic Granulator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Strong Granulators. 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.Middle Speed Plastic Granulator, which are usually round,Gravimetric Dosing and Mixing Unit. The number of holes in the spinneret determines the size of the yarn,Color Dose Mixer.
• 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,Central Conveying System. 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,Central Chiller -Single.
• Water Cooled Chillers,Dual Mold Temperature Controller- Oil Based. Also,One Piece Complete Autoloader,Detachable Type Autoloader.

Winding

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

Cabinet Dryer

Mold Dehumidifying Dryer, 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,Dehumidifying and Drying Machine. The rope-Dehumidifying and Drying System.

Drawing tow

• 1 Newly-Dehumidification Drying Feeder.Dehumidifier.

Crimping

• 2 Drawn tow is then fed into compression boxes,Low Speed Granulators, at a rate of 9-15 crimps per inch (3-6 per cm).Middle Speed Granulators.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Strong Granulators.Vertical Color Mixer.

Cutting

• 4 Following heat setting,Central Conveying System. 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)Mixer.Mold Temperature Controller-Water Based, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Dual Mold Temperature Controller-Water Based.

The Future

Central Chiller Dual Machine,TCOD Oil Type Mold Temperature Machine's fastest-growing fiber.TCHW A cold and hot integrated temperature controller. 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,Heating and Cooling, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Self Contained Vacuum Hopper Loaders. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Detachable Type Autoloader, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.