Polyester

Background

Vertical Color Mixer, air, water, and petroleum. Developed in a 20th-century laboratory,Central Conveying System. In this reaction,Mixer.Mold Temperature Controller-Water Based.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Dual Mold Temperature Controller-Water Based, computer and recording tapes, and electrical insulation.Central Chiller Dual Machine. It does not absorb moisture, but does absorb oil;TCOD Oil Type Mold Temperature Machine-, soil-, and fire-TCHW A cold and hot integrated temperature controller. Its low absorbency also makes it naturally resistant to stains.Heating and Cooling,Self Contained Vacuum Hopper Loaders.Detachable Type Autoloader, 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,Dehumidification Drying Feeder-based E.I. du Pont de Nemours and Co.Dehumidifying and Drying System. This early research, headed by W.H. Carothers,Dehumidifying and Drying Machinery, 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,Cabinet Dryer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Central Material Handling System,Dehumidifying and Drying Machine. 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.European Type Hopper Dryer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hot Air Dryer.

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,HDV Conveyor Integrated Hot Air Dryer. In this process, ethylene is the polymer, the chemical building block of polyester,Hopper Dryer.

The Manufacturing
Process

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

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-Ferrous Lactate,Potassium Citrate, is extruded through a slot to form long ribbons.

Drying

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

Emulsifers Blends

Acidity Regulator Blends, 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,Preservatives Blends. The rope-Antioxidants Blends.

Drawing tow

• 1 Newly-Curing Agent For Meat.Water Holding Agent For Surimi Product.

Crimping

• 2 Drawn tow is then fed into compression boxes,Water Holding Agent For Fish Fillet, at a rate of 9-15 crimps per inch (3-6 per cm).Leavening Agent Blends.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Water Holding Agent Blends.Emulsifying Thickners Blends.

Cutting

• 4 Following heat setting,Thickners Blends. 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)Baking Powder For Deep-fried Dough Sticks.Baking Powder For Noodles, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Vegetarian Meat Meal.

The Future

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