Polyester

Background

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

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

History

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

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,Dehumidifier. In this process, ethylene is the polymer, the chemical building block of polyester,Central Material Handling System.

The Manufacturing
Process

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

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 Conveying System,Central Chiller -Single, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Low Speed Granulators

Middle 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,Strong Granulators. The rope-Vertical Color Mixer.

Drawing tow

• 1 Newly-Central Conveying System.Mixer.

Crimping

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

Setting

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

Cutting

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

The Future

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