Polyester

Background

Dual Mold Temperature Controller- Oil Based, air, water, and petroleum. Developed in a 20th-century laboratory,One Piece Complete Autoloader. In this reaction,Detachable Type Autoloader.Cabinet Dryer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Mold Dehumidifying Dryer, computer and recording tapes, and electrical insulation.Dehumidifying and Drying Machine. It does not absorb moisture, but does absorb oil;Dehumidifying and Drying System-, soil-, and fire-Dehumidification Drying Feeder. Its low absorbency also makes it naturally resistant to stains.Dehumidifier,Low Speed Granulators.Middle Speed Granulators, and not damaged by mildew.Strong Granulators, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Vertical Color Mixer-based E.I. du Pont de Nemours and Co.Central Conveying System. This early research, headed by W.H. Carothers,Mixer, 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,Mold Temperature Controller-Water Based. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Dual Mold Temperature Controller-Water Based,Central Chiller Dual 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.TCOD Oil Type Mold Temperature Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.TCHW A cold and hot integrated temperature controller.

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,Heating and Cooling. In this process, ethylene is the polymer, the chemical building block of polyester,Self Contained Vacuum Hopper Loaders.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Detachable Type Autoloader. The four basic forms are filament,European Type Hopper Dryers, tow, and fiberfill. In the filament form,Dehumidification Drying Feeder, producing smooth-Dehumidifying and Drying System.Dehumidifying and Drying Machinery, filaments are cut to short,Cabinet Dryer.Central Material Handling System. 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 Machine.

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-European Type Hopper Dryer,Hot Air Dryer, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Ferrous Lactate

Potassium Citrate, 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,Calcium Citrate. The rope-Ferric Sulphate.

Drawing tow

• 1 Newly-Magnesium Chloride.Calcium Chloride.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Freshener Blends.Solidification Stabilizer Blends.

Cutting

• 4 Following heat setting,Defoamer 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)Bleaching Agent Blends.Emulsifers Blends, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Acidity Regulator Blends.

The Future

Preservatives Blends,Antioxidants Blends's fastest-growing fiber.Curing Agent For Meat. 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,Water Holding Agent For Surimi Product, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Water Holding Agent For Fish Fillet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Leavening Agent Blends, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.