Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Central Chiller Dual Machine

TCOD Oil Type Mold Temperature 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,TCHW A cold and hot integrated temperature controller. The rope-Heating and Cooling.

Drawing tow

• 1 Newly-Self Contained Vacuum Hopper Loaders.Detachable Type Autoloader.

Crimping

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

Setting

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

Cutting

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

The Future

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