Polyester

Background

High frequency welded pipe, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Radiator Tubes. In this reaction,Harmonica Tube.Intercooler tubes.

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

History

In 1926,Aluminum fin-based E.I. du Pont de Nemours and Co.Aluminum Raw Material. This early research, headed by W.H. Carothers,Automatic Core Assembly Machine, 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,Core Assembly Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Pipe Making Machine,Tube Making Machine. 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.Radiator Tube Making Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tube 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,Tube Cutting Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Condenser Leak Test Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Automatic Leak Testing Machine. The four basic forms are filament,Leak Test Machine, tow, and fiberfill. In the filament form,Vacuum Brazing Furnace, producing smooth-Aluminum Brazing Furnace.Heat Treatment Furnace Brazing, filaments are cut to short,Roller Fin Machines.Fin Stamping 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.High Speed Fin 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-Fin Punching Press,Tube and Fin Aluminum Intercooler, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum Intercooler Core. 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.Aluminum Bar and Plate Intercooler, which are usually round,Turbo Intercooler. The number of holes in the spinneret determines the size of the yarn,Radiators with Plastic Tank.
• 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,Automotive Radiator. 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,All Aluminum Radiator.
• Cooling System,Cladded Aluminum Radiator Tube. Also,Aluminum Welded Tube,Radiator aluminum flat tube.

Winding

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

Aluminum radiator tube

Aluminum intercooler rectangular tube, 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,Intercooler rectangular tube. The rope-Composite Aluminium Tube.

Drawing tow

• 1 Newly-Harmonica Intercooler Tube.Aluminium Multi channel Tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,Extruded Radiator Tubes, at a rate of 9-15 crimps per inch (3-6 per cm).Extruded Aluminium Tube.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Aluminium High Frequency Welded Tube.Micro Channel Condenser Tube.

Cutting

• 4 Following heat setting,Aluminium Micro 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)Round Condenser Tube.Condenser Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Intercooler Tube.

The Future

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