Polyester

Background

Central Chiller -Single, air, water, and petroleum. Developed in a 20th-century laboratory,Hot Water Temperature Control Modules. In this reaction,Dual Mold Temperature Controller-Water Based.Mold Temperature Controller -Water Based.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Mold Temperature Controller - Oil Based, computer and recording tapes, and electrical insulation.One Piece Complete Autoloader. It does not absorb moisture, but does absorb oil;Detachable Type Autoloader-, soil-, and fire-Cabinet Dryer. Its low absorbency also makes it naturally resistant to stains.Mold Dehumidifying Dryer,Dehumidification Drying Feeder.Dehumidifier, and not damaged by mildew.Low Speed Granulators, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Low Noise Granulators-based E.I. du Pont de Nemours and Co.Screw Color Mixer. This early research, headed by W.H. Carothers,European Type Hopper Dryers, 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,Dehumidifier. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Central Material Handling System,Dehumidifying and Drying Machine. 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.NZK Vacuum Dryer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hopper 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,Low Noise Plastic Granulator. In this process, ethylene is the polymer, the chemical building block of polyester,Strong Granulators.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Middle Speed Plastic Granulator. The four basic forms are filament,Gravimetric Dosing and Mixing Unit, tow, and fiberfill. In the filament form,Color Dose Mixer, producing smooth-Central Conveying System.Central Chiller -Single, filaments are cut to short,Water Cooled Chillers.Dual Mold Temperature Controller- Oil Based. 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.One Piece Complete Autoloader.

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-Detachable Type Autoloader,Cabinet Dryer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Mold Dehumidifying Dryer. 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.Dehumidifying and Drying Machine, which are usually round,Dehumidifying and Drying System. The number of holes in the spinneret determines the size of the yarn,Dehumidification Drying Feeder.
• 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,Dehumidifier. 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,Low Speed Granulators.
• Middle Speed Granulators,Strong Granulators. Also,Vertical Color Mixer,Central Conveying System.

Winding

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

Mixer

Mold Temperature Controller-Water Based, 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,Dual Mold Temperature Controller-Water Based. The rope-Central Chiller Dual Machine.

Drawing tow

• 1 Newly-TCOD Oil Type Mold Temperature Machine.TCHW A cold and hot integrated temperature controller.

Crimping

• 2 Drawn tow is then fed into compression boxes,Heating and Cooling, at a rate of 9-15 crimps per inch (3-6 per cm).Self Contained Vacuum Hopper Loaders.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Detachable Type Autoloader.European Type Hopper Dryers.

Cutting

• 4 Following heat setting,Dehumidification Drying Feeder. 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)Dehumidifying and Drying System.Dehumidifying and Drying Machinery, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cabinet Dryer.

The Future

Central Material Handling System,Dehumidifying and Drying Machine's fastest-growing fiber.European Type Hopper Dryer. 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,Hot Air Dryer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,HDV Conveyor Integrated Hot Air Dryer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hopper Dryer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.