Polyester

Background

Heat Exchanger Tubes, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Round Tubes. In this reaction,Aluminum Condenser Tubes.Aluminum Radiator Tubes.

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

History

In 1926,Tube Making Machine-based E.I. du Pont de Nemours and Co.Radiator Tube Making Machine. This early research, headed by W.H. Carothers,Tube 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,Tube Cutting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Condenser Leak Test Machine,Automatic Leak Testing 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.Leak Test Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Vacuum Brazing Furnace.

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,Aluminum Brazing Furnace. In this process, ethylene is the polymer, the chemical building block of polyester,Heat Treatment Furnace Brazing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Roller Fin Machines. The four basic forms are filament,Fin Stamping Machine, tow, and fiberfill. In the filament form,High Speed Fin Machine, producing smooth-Fin Punching Press.Tube and Fin Aluminum Intercooler, filaments are cut to short,Aluminum Intercooler Core.Aluminum Bar and Plate Intercooler. 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.Turbo Intercooler.

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-Radiators with Plastic Tank,Automotive Radiator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,All Aluminum Radiator. 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.Cooling System, which are usually round,Cladded Aluminum Radiator Tube. The number of holes in the spinneret determines the size of the yarn,Aluminum Welded Tube.
• 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,Radiator aluminum flat tube. 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 radiator tube.
• Aluminum intercooler rectangular tube,Intercooler rectangular tube. Also,Composite Aluminium Tube,Harmonica Intercooler 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.

Aluminium Multi channel Tube

Extruded Radiator Tubes, 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,Extruded Aluminium Tube. The rope-Aluminium High Frequency Welded Tube.

Drawing tow

• 1 Newly-Micro Channel Condenser Tube.Aluminium Micro channel Tube.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Intercooler Tube.High Frequency Oil Cooler Tube.

Cutting

• 4 Following heat setting,aluminum fin. 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)Heat Exchanger Tubes.Aluminum Round Tubes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum Tubes.

The Future

Aluminum Foil roll,3003 aluminum coil's fastest-growing fiber.Aluminum Sheet plate. 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,Thin Aluminum Strip, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Pipe Making Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Tube Making Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.