Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,8 Bars LED Indoor Grow Light 680W, computer and recording tapes, and electrical insulation.Led Grow Light. It does not absorb moisture, but does absorb oil;Aluminum Bar-, soil-, and fire-Aluminum Tubes. Its low absorbency also makes it naturally resistant to stains.Extruded Aluminium Tube,Extruded Aluminium Tube.Aluminum tube, and not damaged by mildew.Harmonica Tube, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

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

Drying

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

Winding

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

High Speed Fin Machine

Fin Punching Press, 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,Tube and Fin Aluminum Intercooler. The rope-Aluminum Intercooler Core.

Drawing tow

• 1 Newly-Aluminum Bar and Plate Intercooler.Turbo Intercooler.

Crimping

• 2 Drawn tow is then fed into compression boxes,Radiators with Plastic Tank, at a rate of 9-15 crimps per inch (3-6 per cm).Automotive Radiator.

Setting

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

Cutting

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

The Future

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