Polyester

Background

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

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

History

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

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,TCHW A cold and hot integrated temperature controller. In this process, ethylene is the polymer, the chemical building block of polyester,Heating and Cooling.

The Manufacturing
Process

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

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-Dehumidifying and Drying Machine,European Type Hopper Dryer, is extruded through a slot to form long ribbons.

Drying

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

Zinc Lactate

Ferrous Lactate, 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,Potassium Citrate. The rope-Calcium Citrate.

Drawing tow

• 1 Newly-Ferric Sulphate.Magnesium Chloride.

Crimping

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

Setting

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

Cutting

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

The Future

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