Polyester

Background

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

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

History

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

The Manufacturing
Process

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

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-Roller Fin Machines,Fin Stamping Machine, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Cladded Aluminum Radiator Tube

Aluminum Welded 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,Radiator aluminum flat tube. The rope-Aluminum radiator tube.

Drawing tow

• 1 Newly-Aluminum intercooler rectangular tube.Intercooler rectangular tube.

Crimping

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

Setting

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

Cutting

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

The Future

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