Polyester

Background

Dehumidifying and Drying Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Dehumidifying and Drying System. In this reaction,Dehumidification Drying Feeder.Dehumidifier.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Low Speed Granulators, computer and recording tapes, and electrical insulation.Middle Speed Granulators. It does not absorb moisture, but does absorb oil;Strong Granulators-, soil-, and fire-Vertical Color Mixer. Its low absorbency also makes it naturally resistant to stains.Central Conveying System,Mixer.Mold Temperature Controller-Water Based, and not damaged by mildew.Dual Mold Temperature Controller-Water Based, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Central Chiller Dual Machine-based E.I. du Pont de Nemours and Co.TCOD Oil Type Mold Temperature Machine. This early research, headed by W.H. Carothers,TCHW A cold and hot integrated temperature controller, 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,Heating and Cooling. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Self Contained Vacuum Hopper Loaders,Detachable Type Autoloader. 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 Dryers, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Dehumidification Drying Feeder.

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 System. In this process, ethylene is the polymer, the chemical building block of polyester,Dehumidifying and Drying Machinery.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Cabinet Dryer. The four basic forms are filament,Central Material Handling System, tow, and fiberfill. In the filament form,Dehumidifying and Drying Machine, producing smooth-European Type Hopper Dryer.Hot Air Dryer, filaments are cut to short,HDV Conveyor Integrated Hot Air Dryer.Hopper Dryer. 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.

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-Manganese Gluconate,Copper Gluconate, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Zinc Gluconate. 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 Gluconate, which are usually round,Potassium Gluconate. The number of holes in the spinneret determines the size of the yarn,Magnesium Lactate.
• 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,Zinc Lactate. 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,Ferrous Lactate.
• Potassium Citrate,Calcium Citrate. Also,Ferric Sulphate,Magnesium Chloride.

Winding

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

Calcium Chloride

Magnesium Carbonate, 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,Minerals. The rope-Freshener Blends.

Drawing tow

• 1 Newly-Solidification Stabilizer Blends.Defoamer Blends.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Acidity Regulator Blends.Preservatives Blends.

Cutting

• 4 Following heat setting,Antioxidants 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)Curing Agent For Meat.Water Holding Agent For Surimi Product, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Water Holding Agent For Fish Fillet.

The Future

Leavening Agent Blends,Water Holding Agent Blends's fastest-growing fiber.Emulsifying Thickners 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,Thickners Blends, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Baking Powder For Deep-fried Dough Sticks. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Baking Powder For Noodles, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.