Polyester

Background

Mold Temperature Controller-Water Based, air, water, and petroleum. Developed in a 20th-century laboratory,Dual Mold Temperature Controller-Water Based. In this reaction,Central Chiller Dual Machine.TCOD Oil Type Mold Temperature Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,TCHW A cold and hot integrated temperature controller, computer and recording tapes, and electrical insulation.Heating and Cooling. It does not absorb moisture, but does absorb oil;Self Contained Vacuum Hopper Loaders-, soil-, and fire-Detachable Type Autoloader. Its low absorbency also makes it naturally resistant to stains.European Type Hopper Dryers,Dehumidification Drying Feeder.Dehumidifying and Drying System, and not damaged by mildew.Dehumidifying and Drying Machinery, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Cabinet Dryer-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,European Type Hopper Dryer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hot Air Dryer,HDV Conveyor Integrated Hot Air 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.Dehumidifying and Drying.

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,Manganese Gluconate. In this process, ethylene is the polymer, the chemical building block of polyester,Copper Gluconate.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Zinc Gluconate. The four basic forms are filament,Magnesium Gluconate, tow, and fiberfill. In the filament form,Potassium Gluconate, producing smooth-Magnesium Lactate.Zinc Lactate, filaments are cut to short,Ferrous Lactate.Potassium Citrate. 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.Calcium Citrate.

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-Ferric Sulphate,Magnesium Chloride, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Calcium Chloride. 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.Magnesium Carbonate, which are usually round,Minerals. The number of holes in the spinneret determines the size of the yarn,Freshener Blends.
• 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,Solidification Stabilizer Blends. 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,Defoamer Blends.
• Bleaching Agent Blends,Emulsifers Blends. Also,Acidity Regulator Blends,Preservatives Blends.

Winding

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

Antioxidants Blends

Curing Agent For Meat, 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,Water Holding Agent For Surimi Product. The rope-Water Holding Agent For Fish Fillet.

Drawing tow

• 1 Newly-Leavening Agent Blends.Water Holding Agent Blends.

Crimping

• 2 Drawn tow is then fed into compression boxes,Emulsifying Thickners Blends, at a rate of 9-15 crimps per inch (3-6 per cm).Thickners Blends.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Baking Powder For Deep-fried Dough Sticks.Baking Powder For Noodles.

Cutting

• 4 Following heat setting,Vegetarian Meat Meal. 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)Fat Replacement Powder.Carrageenan For Tumbling And Marinated, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminium Phosphate.

The Future

Zinc Metaphosphate,Diammonium Phosphate's fastest-growing fiber.Zinc Phosphate. 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,Boron Phosphate, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Aluminium Dihydrogen Phosphate. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Ammonium Metaphosphate, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.