Polyester

Background

Extruded Aluminium Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Extruded Aluminium Tube. In this reaction,Aluminum tube.Harmonica Tube.

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

History

In 1926,Aluminum Condenser Tubes-based E.I. du Pont de Nemours and Co.Aluminum Radiator Tubes. This early research, headed by W.H. Carothers,Aluminum 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 Sheet plate. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Thin Aluminum Strip,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.Aluminum Raw Material, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Automatic Core Assembly Machine.

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,Core Assembly Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Pipe Making Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tube Making Machine. The four basic forms are filament,Radiator Tube Making Machine, tow, and fiberfill. In the filament form,Tube Machine, producing smooth-Tube Cutting Machine.Condenser Leak Test Machine, filaments are cut to short,Automatic Leak Testing Machine.Leak Test 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.Vacuum Brazing Furnace.

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-Aluminum Brazing Furnace,Heat Treatment Furnace Brazing, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Roller Fin Machines. 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.Fin Stamping Machine, which are usually round,High Speed Fin Machine. The number of holes in the spinneret determines the size of the yarn,Fin Punching Press.
• 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 and Fin Aluminum Intercooler. 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,Aluminum Intercooler Core.
• Aluminum Bar and Plate Intercooler,Turbo Intercooler. Also,Radiators with Plastic Tank,Automotive Radiator.

Winding

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

All Aluminum Radiator

Cooling System, 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,Cladded Aluminum Radiator Tube. The rope-Aluminum Welded Tube.

Drawing tow

• 1 Newly-Radiator aluminum flat tube.Aluminum radiator tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,Aluminum intercooler rectangular tube, at a rate of 9-15 crimps per inch (3-6 per cm).Intercooler rectangular tube.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Composite Aluminium Tube.Harmonica Intercooler Tube.

Cutting

• 4 Following heat setting,Aluminium Multi channel 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)Extruded Radiator Tubes.Extruded Aluminium Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminium High Frequency Welded Tube.

The Future

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