Polyester

Background

One Piece Complete Autoloader, air, water, and petroleum. Developed in a 20th-century laboratory,Detachable Type Autoloader. In this reaction,Cabinet Dryer.Mold Dehumidifying Dryer.

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

History

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

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,Central Conveying System. In this process, ethylene is the polymer, the chemical building block of polyester,Central Chiller -Single.

The Manufacturing
Process

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

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-Dehumidification Drying Feeder,Dehumidifier, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Low Speed 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 Granulators, which are usually round,Strong Granulators. The number of holes in the spinneret determines the size of the yarn,Vertical Color 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,Mixer.
• Mold Temperature Controller-Water Based,Dual Mold Temperature Controller-Water Based. Also,Central Chiller Dual Machine,TCOD Oil Type Mold Temperature Machine.

Winding

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

TCHW A cold and hot integrated temperature controller

Heating and Cooling, 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,Self Contained Vacuum Hopper Loaders. The rope-Detachable Type Autoloader.

Drawing tow

• 1 Newly-European Type Hopper Dryers.Dehumidification Drying Feeder.

Crimping

• 2 Drawn tow is then fed into compression boxes,Dehumidifying and Drying System, at a rate of 9-15 crimps per inch (3-6 per cm).Dehumidifying and Drying Machinery.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cabinet Dryer.Central Material Handling System.

Cutting

• 4 Following heat setting,Dehumidifying and Drying Machine. 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)European Type Hopper Dryer.Hot Air Dryer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HDV Conveyor Integrated Hot Air Dryer.

The Future

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