Polyester

Background

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

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

History

In 1926,Aluminum Round Tubes-based E.I. du Pont de Nemours and Co.Aluminum Condenser Tubes. 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,Aluminum Tubes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Aluminum Sheet plate,Thin Aluminum Strip. 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 fin, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum Raw Material.

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

The Manufacturing
Process

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

Drying

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

Winding

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

Automotive Radiator

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

Drawing tow

• 1 Newly-Aluminum Welded Tube.Radiator aluminum flat tube.

Crimping

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

Setting

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

Cutting

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

The Future

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