Polyester

Background

Color Dose Mixer, air, water, and petroleum. Developed in a 20th-century laboratory,Central Conveying System. In this reaction,Central Chiller -Single.Water Cooled Chillers.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Dual 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,Dehumidifying and Drying Machine.Dehumidifying and Drying System, and not damaged by mildew.Dehumidification Drying Feeder, 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.Low Speed Granulators. This early research, headed by W.H. Carothers,Middle Speed Granulators, 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,Strong Granulators. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Vertical Color Mixer,Central Conveying System. 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.Mixer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Mold Temperature Controller-Water Based.

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,Dual Mold Temperature Controller-Water Based. In this process, ethylene is the polymer, the chemical building block of polyester,Central Chiller Dual Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.TCOD Oil Type Mold Temperature Machine. The four basic forms are filament,TCHW A cold and hot integrated temperature controller, tow, and fiberfill. In the filament form,Heating and Cooling, producing smooth-Self Contained Vacuum Hopper Loaders.Detachable Type Autoloader, filaments are cut to short,European Type Hopper Dryers.Dehumidification Drying Feeder. 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-Dehumidifying and Drying Machinery,Cabinet Dryer, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Central Material Handling 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.Dehumidifying and Drying Machine, which are usually round,European Type Hopper Dryer. The number of holes in the spinneret determines the size of the yarn,Hot Air Dryer.
• 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,HDV Conveyor Integrated Hot Air Dryer. 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,Hopper Dryer.
• Dehumidifying and Drying,Manganese Gluconate. Also,Copper Gluconate,Zinc Gluconate.

Winding

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

Magnesium Gluconate

Potassium Gluconate, 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,Magnesium Lactate. The rope-Zinc Lactate.

Drawing tow

• 1 Newly-Ferrous Lactate.Potassium Citrate.

Crimping

• 2 Drawn tow is then fed into compression boxes,Calcium Citrate, at a rate of 9-15 crimps per inch (3-6 per cm).Ferric Sulphate.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Magnesium Chloride.Calcium Chloride.

Cutting

• 4 Following heat setting,Magnesium Carbonate. 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)Minerals.Freshener Blends, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Solidification Stabilizer Blends.

The Future

Defoamer Blends,Bleaching Agent Blends's fastest-growing fiber.Emulsifers Blends. 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,Acidity Regulator Blends, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Preservatives Blends. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Antioxidants Blends, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.