Polyester

Background

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

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

History

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

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,Hopper Dryer. In this process, ethylene is the polymer, the chemical building block of polyester,Low Noise Plastic Granulator.

The Manufacturing
Process

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

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-One Piece Complete Autoloader,Detachable Type Autoloader, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Central Conveying System

Mixer, 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,Mold Temperature Controller-Water Based. The rope-Dual Mold Temperature Controller-Water Based.

Drawing tow

• 1 Newly-Central Chiller Dual Machine.TCOD Oil Type Mold Temperature Machine.

Crimping

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

Setting

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

Cutting

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

The Future

Cabinet Dryer,Central Material Handling System's fastest-growing fiber.Dehumidifying and Drying Machine. 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,European Type Hopper Dryer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Hot Air Dryer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.HDV Conveyor Integrated 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.