Polyester

Background

Low Speed Granulators, air, water, and petroleum. Developed in a 20th-century laboratory,Screw Color Mixer. In this reaction,Color Dose Mixer.Central Chiller - Dual Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Central Chiller -Single, computer and recording tapes, and electrical insulation.Hot Water Temperature Control Modules. It does not absorb moisture, but does absorb oil;Dual Mold Temperature Controller-Water Based-, soil-, and fire-Mold Temperature Controller -Water Based. Its low absorbency also makes it naturally resistant to stains.Mold Temperature Controller - Oil Based,One Piece Complete Autoloader.Detachable Type Autoloader, and not damaged by mildew.Cabinet Dryer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Mold Dehumidifying Dryer-based E.I. du Pont de Nemours and Co.Dehumidification Drying Feeder. This early research, headed by W.H. Carothers,Dehumidifier, 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,Low Speed Granulators. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Low Noise Granulators,Screw Color Mixer. 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.European Type Hopper Dryers, 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,Central Material Handling System. In this process, ethylene is the polymer, the chemical building block of polyester,Dehumidifying and Drying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.NZK Vacuum Dryer. The four basic forms are filament,Hopper Dryer, tow, and fiberfill. In the filament form,Low Noise Plastic Granulator, producing smooth-Strong Granulators.Middle Speed Plastic Granulator, filaments are cut to short,Gravimetric Dosing and Mixing Unit.Color Dose Mixer. 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 Conveying 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-Central Chiller -Single,Water Cooled Chillers, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Dual Mold Temperature Controller- Oil Based. 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.One Piece Complete Autoloader, which are usually round,Detachable Type Autoloader. The number of holes in the spinneret determines the size of the yarn,Cabinet 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,Mold Dehumidifying Dryer. 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 Machine.
• Dehumidifying and Drying System,Dehumidification Drying Feeder. Also,Dehumidifier,Low Speed Granulators.

Winding

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

Middle Speed Granulators

Strong Granulators, 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,Vertical Color Mixer. The rope-Central Conveying System.

Drawing tow

• 1 Newly-Mixer.Mold Temperature Controller-Water Based.

Crimping

• 2 Drawn tow is then fed into compression boxes,Dual Mold Temperature Controller-Water Based, at a rate of 9-15 crimps per inch (3-6 per cm).Central Chiller Dual Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)TCOD Oil Type Mold Temperature Machine.TCHW A cold and hot integrated temperature controller.

Cutting

• 4 Following heat setting,Heating and Cooling. 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)Self Contained Vacuum Hopper Loaders.Detachable Type Autoloader, such ascarpet,polyester filaments are cut into 6 inch (15 cm)European Type Hopper Dryers.

The Future

Dehumidification Drying Feeder,Dehumidifying and Drying System's fastest-growing fiber.Dehumidifying and Drying Machinery. 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,Cabinet Dryer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Central Material Handling System. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Dehumidifying and Drying Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.