Polyester

Background

Colors PVC Foam Board, air, water, and petroleum. Developed in a 20th-century laboratory,Low Density PVC Free Foam Board. In this reaction,PVC Foam Sheet.Low Noise Plastic Granulator.

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

History

In 1926,Dual Mold Temperature Controller-Water Based-based E.I. du Pont de Nemours and Co.Mold Temperature Controller -Water Based. This early research, headed by W.H. Carothers,Mold Temperature Controller - Oil Based, 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,One Piece Complete Autoloader. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Detachable Type Autoloader,Cabinet Dryer. 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.Mold Dehumidifying Dryer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Dehumidification Drying Feeder.

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,Low Speed Granulators.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Low Noise Granulators. The four basic forms are filament,Screw Color Mixer, tow, and fiberfill. In the filament form,European Type Hopper Dryers, producing smooth-Dehumidifier.Central Material Handling System, filaments are cut to short,Dehumidifying and Drying Machine.NZK Vacuum Dryer. 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.Hopper Dryer.

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-Low Noise Plastic Granulator,Strong Granulators, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Middle Speed Plastic Granulator. 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.Gravimetric Dosing and Mixing Unit, which are usually round,Color Dose Mixer. The number of holes in the spinneret determines the size of the yarn,Central Conveying 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,Central Chiller -Single. 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,Water Cooled Chillers.
• Dual Mold Temperature Controller- Oil Based,One Piece Complete Autoloader. Also,Detachable Type Autoloader,Cabinet Dryer.

Winding

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

Mold Dehumidifying Dryer

Dehumidifying and Drying Machine, 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,Dehumidifying and Drying System. The rope-Dehumidification Drying Feeder.

Drawing tow

• 1 Newly-Dehumidifier.Low Speed Granulators.

Crimping

• 2 Drawn tow is then fed into compression boxes,Middle Speed Granulators, at a rate of 9-15 crimps per inch (3-6 per cm).Strong Granulators.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Vertical Color Mixer.Central Conveying System.

Cutting

• 4 Following heat setting,Mixer. 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)Mold Temperature Controller-Water Based.Dual Mold Temperature Controller-Water Based, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Central Chiller Dual Machine.

The Future

TCOD Oil Type Mold Temperature Machine,TCHW A cold and hot integrated temperature controller's fastest-growing fiber.Heating and Cooling. 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,Self Contained Vacuum Hopper Loaders, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Detachable Type Autoloader. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.European Type Hopper Dryers, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.