Polyester

Background

Dehumidifying and Drying Machine, air, water, and petroleum. Developed in a 20th-century laboratory,NZK Vacuum Dryer. In this reaction,Hopper Dryer.Low Noise Plastic Granulator.

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

History

In 1926,One Piece Complete Autoloader-based E.I. du Pont de Nemours and Co.Detachable Type Autoloader. This early research, headed by W.H. Carothers,Cabinet Dryer, 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 Dehumidifying Dryer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Dehumidifying and Drying Machine,Dehumidifying and Drying System. 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.Dehumidification Drying Feeder, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Dehumidifier.

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,Low Speed Granulators. In this process, ethylene is the polymer, the chemical building block of polyester,Middle Speed Granulators.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Strong Granulators. The four basic forms are filament,Vertical Color Mixer, tow, and fiberfill. In the filament form,Central Conveying System, producing smooth-Mixer.Mold Temperature Controller-Water Based, filaments are cut to short,Dual Mold Temperature Controller-Water Based.Central Chiller Dual Machine. 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.TCOD Oil Type Mold Temperature 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-TCHW A cold and hot integrated temperature controller,Heating and Cooling, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Self Contained Vacuum Hopper Loaders. 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.Detachable Type Autoloader, which are usually round,European Type Hopper Dryers. The number of holes in the spinneret determines the size of the yarn,Dehumidification Drying Feeder.
• 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 System. 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,Dehumidifying and Drying Machinery.
• Cabinet Dryer,Central Material Handling System. Also,Dehumidifying and Drying Machine,European Type Hopper Dryer.

Winding

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

Hot Air Dryer

HDV Conveyor Integrated Hot Air Dryer, 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,Hopper Dryer. The rope-Dehumidifying and Drying.

Drawing tow

• 1 Newly-Manganese Gluconate.Copper Gluconate.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Zinc Lactate. 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)Ferrous Lactate.Potassium Citrate, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Calcium Citrate.

The Future

Ferric Sulphate,Magnesium Chloride's fastest-growing fiber.Calcium Chloride. 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,Magnesium Carbonate, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Minerals. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Freshener Blends, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.