Polyester

Background

Dual Mold Temperature Controller-Water Based, air, water, and petroleum. Developed in a 20th-century laboratory,Mold Temperature Controller -Water Based. In this reaction,Mold Temperature Controller - Oil Based.One Piece Complete Autoloader.

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

History

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

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,Middle Speed Plastic Granulator. In this process, ethylene is the polymer, the chemical building block of polyester,Gravimetric Dosing and Mixing Unit.

The Manufacturing
Process

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

Drying

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

Winding

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

Dual Mold Temperature Controller-Water Based

Central Chiller Dual Machine, 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,TCOD Oil Type Mold Temperature Machine. The rope-TCHW A cold and hot integrated temperature controller.

Drawing tow

• 1 Newly-Heating and Cooling.Self Contained Vacuum Hopper Loaders.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Dehumidification Drying Feeder.Dehumidifying and Drying System.

Cutting

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

The Future

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