Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Indoor Grow Light 720W With Seoul LED, computer and recording tapes, and electrical insulation.LED Indoor Grow Light 840W. It does not absorb moisture, but does absorb oil;Indoor Grow Light 840W With Seoul LED-, soil-, and fire-840W Grow Light LM301H For Indoor Plants. Its low absorbency also makes it naturally resistant to stains.ELENOR X8 LED indoor grow light 960W,8 Bars LED Indoor Grow Light 640W.8 Bars LED Indoor Grow Light 680W, and not damaged by mildew.Led Grow Light, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aluminum Bar-based E.I. du Pont de Nemours and Co.Aluminum Tubes. This early research, headed by W.H. Carothers,Extruded Aluminium Tube, 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,Extruded Aluminium Tube. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Aluminum tube,Harmonica Tube. 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.Aluminium High Frequency Welded Tube, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High frequency welded pipe.

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 Radiator Tubes. In this process, ethylene is the polymer, the chemical building block of polyester,Harmonica Tube.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Intercooler tubes. The four basic forms are filament,aluminum fin, tow, and fiberfill. In the filament form,Heat Exchanger Tubes, producing smooth-Aluminum Round Tubes.Aluminum Condenser Tubes, filaments are cut to short,Aluminum Radiator Tubes.Aluminum Tubes. 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.Aluminum Sheet plate.

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-Thin Aluminum Strip,Aluminum fin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum Raw Material. 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 Core Assembly Machine, which are usually round,Core Assembly Machine. The number of holes in the spinneret determines the size of the yarn,Pipe Making 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,Tube Making 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,Radiator Tube Making Machine.
• Tube Machine,Tube Cutting Machine. Also,Condenser Leak Test Machine,Automatic Leak Testing 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.

Leak Test Machine

Vacuum Brazing Furnace, 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 Brazing Furnace. The rope-Heat Treatment Furnace Brazing.

Drawing tow

• 1 Newly-Roller Fin Machines.Fin Stamping Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Speed Fin Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Fin Punching Press.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Tube and Fin Aluminum Intercooler.Aluminum Intercooler Core.

Cutting

• 4 Following heat setting,Aluminum Bar and Plate Intercooler. 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)Turbo Intercooler.Radiators with Plastic Tank, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Automotive Radiator.

The Future

All Aluminum Radiator,Cooling System's fastest-growing fiber.Cladded Aluminum Radiator 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,Aluminum Welded Tube, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Radiator aluminum flat tube. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminum radiator tube, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.