Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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 Stamping Machine,High Speed Fin Machine, is extruded through a slot to form long ribbons.

Drying

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

Radiator aluminum flat 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,Aluminum radiator tube. The rope-Aluminum intercooler rectangular tube.

Drawing tow

• 1 Newly-Intercooler rectangular tube.Composite Aluminium Tube.

Crimping

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

Setting

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

Cutting

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

The Future

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