Polyester

Background

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

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

History

In 1926,Dehumidifying and Drying Machinery-based E.I. du Pont de Nemours and Co.Cabinet Dryer. This early research, headed by W.H. Carothers,Central Material Handling System, 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,Dehumidifying and Drying Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.European Type Hopper Dryer,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.HDV Conveyor Integrated Hot Air Dryer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hopper 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,Dehumidifying and Drying. In this process, ethylene is the polymer, the chemical building block of polyester,Manganese Gluconate.

The Manufacturing
Process

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

Drying

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

Preservatives Blends

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

Drawing tow

• 1 Newly-Water Holding Agent For Fish Fillet.Leavening Agent Blends.

Crimping

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

Setting

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

Cutting

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

The Future

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