Polyester

Background

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.Dehumidification Drying Feeder. It does not absorb moisture, but does absorb oil;Dehumidifier-, soil-, and fire-Low Speed Granulators. Its low absorbency also makes it naturally resistant to stains.Low Noise Granulators,Screw Color Mixer.European Type Hopper Dryers, and not damaged by mildew.Dehumidifier, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Central Material Handling System-based E.I. du Pont de Nemours and Co.Dehumidifying and Drying Machine. This early research, headed by W.H. Carothers,NZK Vacuum 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,Hopper Dryer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Low Noise Plastic Granulator,Strong Granulators. 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.Middle Speed Plastic Granulator, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gravimetric Dosing and Mixing Unit.

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,Color Dose Mixer. In this process, ethylene is the polymer, the chemical building block of polyester,Central Conveying System.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Central Chiller -Single. The four basic forms are filament,Water Cooled Chillers, tow, and fiberfill. In the filament form,Dual Mold Temperature Controller- Oil Based, producing smooth-One Piece Complete Autoloader.Detachable Type Autoloader, filaments are cut to short,Cabinet Dryer.Mold Dehumidifying 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 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-Dehumidifying and Drying System,Dehumidification Drying Feeder, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Dehumidifier. 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.Low Speed Granulators, which are usually round,Middle Speed Granulators. The number of holes in the spinneret determines the size of the yarn,Strong Granulators.
• 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,Vertical Color Mixer. 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,Central Conveying System.
• Mixer,Mold Temperature Controller-Water Based. Also,Dual Mold Temperature Controller-Water Based,Central Chiller Dual Machine.

Winding

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

TCOD Oil Type Mold Temperature Machine

TCHW A cold and hot integrated temperature controller, 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,Heating and Cooling. The rope-Self Contained Vacuum Hopper Loaders.

Drawing tow

• 1 Newly-Detachable Type Autoloader.European Type Hopper Dryers.

Crimping

• 2 Drawn tow is then fed into compression boxes,Dehumidification Drying Feeder, at a rate of 9-15 crimps per inch (3-6 per cm).Dehumidifying and Drying System.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Dehumidifying and Drying Machinery.Cabinet Dryer.

Cutting

• 4 Following heat setting,Central Material Handling System. 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)Dehumidifying and Drying Machine.European Type Hopper Dryer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hot Air Dryer.

The Future

HDV Conveyor Integrated Hot Air Dryer,Hopper Dryer's fastest-growing fiber.Dehumidifying and Drying. 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,Manganese Gluconate, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Copper Gluconate. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Zinc Gluconate, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.