Polyester

Background

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

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

History

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

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,Strong Granulators. In this process, ethylene is the polymer, the chemical building block of polyester,Middle Speed Plastic Granulator.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Gravimetric Dosing and Mixing Unit. The four basic forms are filament,Color Dose Mixer, tow, and fiberfill. In the filament form,Central Conveying System, producing smooth-Central Chiller -Single.Water Cooled Chillers, filaments are cut to short,Dual Mold Temperature Controller- Oil Based.One Piece Complete Autoloader. 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.Detachable Type 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-Cabinet Dryer,Mold Dehumidifying Dryer, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Mold Temperature Controller-Water Based

Dual 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,Central Chiller Dual Machine. The rope-TCOD Oil Type Mold Temperature Machine.

Drawing tow

• 1 Newly-TCHW A cold and hot integrated temperature controller.Heating and Cooling.

Crimping

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

Setting

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

Cutting

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

The Future

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