Polyester

Background

Color Dose Mixer, air, water, and petroleum. Developed in a 20th-century laboratory,Central Chiller - Dual Machine. In this reaction,Central Chiller -Single.Hot Water Temperature Control Modules.

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

History

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

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,NZK Vacuum Dryer. In this process, ethylene is the polymer, the chemical building block of polyester,Hopper Dryer.

The Manufacturing
Process

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

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-Dual Mold Temperature Controller- Oil Based,One Piece Complete Autoloader, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Detachable Type Autoloader. 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.Cabinet Dryer, which are usually round,Mold Dehumidifying Dryer. The number of holes in the spinneret determines the size of the yarn,Dehumidifying and Drying Machine.
• 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,Dehumidification Drying Feeder.
• Dehumidifier,Low Speed Granulators. Also,Middle Speed Granulators,Strong 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.

Vertical Color Mixer

Central Conveying System, 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,Mixer. The rope-Mold Temperature Controller-Water Based.

Drawing tow

• 1 Newly-Dual Mold Temperature Controller-Water Based.Central Chiller Dual Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,TCOD Oil Type Mold Temperature Machine, at a rate of 9-15 crimps per inch (3-6 per cm).TCHW A cold and hot integrated temperature controller.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Heating and Cooling.Self Contained Vacuum Hopper Loaders.

Cutting

• 4 Following heat setting,Detachable Type Autoloader. 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)European Type Hopper Dryers.Dehumidification Drying Feeder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Dehumidifying and Drying System.

The Future

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