Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Central Material Handling System,Dehumidifying and Drying Machine, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Magnesium Lactate

Zinc 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,Ferrous Lactate. The rope-Potassium Citrate.

Drawing tow

• 1 Newly-Calcium Citrate.Ferric Sulphate.

Crimping

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

Setting

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

Cutting

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

The Future

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