Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminum Bar, computer and recording tapes, and electrical insulation.Aluminum Tubes. It does not absorb moisture, but does absorb oil;Extruded Aluminium Tube-, soil-, and fire-Extruded Aluminium Tube. Its low absorbency also makes it naturally resistant to stains.Aluminum tube,Harmonica Tube.Aluminium High Frequency Welded Tube, and not damaged by mildew.High frequency welded pipe, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aluminum Radiator Tubes-based E.I. du Pont de Nemours and Co.Harmonica Tube. This early research, headed by W.H. Carothers,Intercooler tubes, 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,aluminum fin. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Heat Exchanger Tubes,Aluminum Round Tubes. 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.Aluminum Condenser Tubes, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum Radiator Tubes.

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,Aluminum Tubes. In this process, ethylene is the polymer, the chemical building block of polyester,Aluminum Sheet plate.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Thin Aluminum Strip. The four basic forms are filament,Aluminum fin, tow, and fiberfill. In the filament form,Aluminum Raw Material, producing smooth-Automatic Core Assembly Machine.Core Assembly Machine, filaments are cut to short,Pipe Making Machine.Tube Making Machine. 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.Radiator Tube Making Machine.

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-Tube Machine,Tube Cutting Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Condenser Leak Test Machine. 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.Automatic Leak Testing Machine, which are usually round,Leak Test Machine. The number of holes in the spinneret determines the size of the yarn,Vacuum Brazing Furnace.
• 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,Aluminum Brazing Furnace. 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,Heat Treatment Furnace Brazing.
• Roller Fin Machines,Fin Stamping Machine. Also,High Speed Fin Machine,Fin Punching Press.

Winding

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

Tube and Fin Aluminum Intercooler

Aluminum Intercooler Core, 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,Aluminum Bar and Plate Intercooler. The rope-Turbo Intercooler.

Drawing tow

• 1 Newly-Radiators with Plastic Tank.Automotive Radiator.

Crimping

• 2 Drawn tow is then fed into compression boxes,All Aluminum Radiator, at a rate of 9-15 crimps per inch (3-6 per cm).Cooling System.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cladded Aluminum Radiator Tube.Aluminum Welded Tube.

Cutting

• 4 Following heat setting,Radiator aluminum flat tube. 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)Aluminum radiator tube.Aluminum intercooler rectangular tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Intercooler rectangular tube.

The Future

Composite Aluminium Tube,Harmonica Intercooler Tube's fastest-growing fiber.Aluminium Multi channel Tube. 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,Extruded Radiator Tubes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Extruded Aluminium Tube. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminium High Frequency Welded Tube, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.