Polyester

Background

Mid Speed Granulator, air, water, and petroleum. Developed in a 20th-century laboratory,Middle Speed Plastic Granulator. In this reaction,Low Speed Granulators.Screw Color Mixer.

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

History

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

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,European Type Hopper Dryers. In this process, ethylene is the polymer, the chemical building block of polyester,Dehumidifier.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Central Material Handling System. The four basic forms are filament,Dehumidifying and Drying Machine, tow, and fiberfill. In the filament form,NZK Vacuum Dryer, producing smooth-Hopper Dryer.Low Noise Plastic Granulator, filaments are cut to short,Strong Granulators.Middle Speed Plastic Granulator. 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.Gravimetric Dosing and Mixing Unit.

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-Color Dose Mixer,Central Conveying System, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Dehumidifier

Low Speed 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,Middle Speed Granulators. The rope-Strong Granulators.

Drawing tow

• 1 Newly-Vertical Color Mixer.Central Conveying System.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Dual Mold Temperature Controller-Water Based.Central Chiller Dual Machine.

Cutting

• 4 Following heat setting,TCOD Oil Type Mold Temperature Machine. 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)TCHW A cold and hot integrated temperature controller.Heating and Cooling, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Self Contained Vacuum Hopper Loaders.

The Future

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