Polyester

Background

Automotive Radiator, air, water, and petroleum. Developed in a 20th-century laboratory,All Aluminum Radiator. In this reaction,Cooling System.Cladded Aluminum Radiator Tube.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminum Welded Tube, computer and recording tapes, and electrical insulation.Radiator aluminum flat tube. It does not absorb moisture, but does absorb oil;Aluminum radiator tube-, soil-, and fire-Aluminum intercooler rectangular tube. Its low absorbency also makes it naturally resistant to stains.Intercooler rectangular tube,Composite Aluminium Tube.Harmonica Intercooler Tube, and not damaged by mildew.Aluminium Multi channel Tube, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Extruded Radiator Tubes-based E.I. du Pont de Nemours and Co.Extruded Aluminium Tube. This early research, headed by W.H. Carothers,Aluminium High Frequency Welded Tube, 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,Micro Channel Condenser Tube. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Aluminium Micro channel Tube,Round Condenser Tube. 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.Condenser Tube, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Intercooler Tube.

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,High Frequency Oil Cooler Tube. In this process, ethylene is the polymer, the chemical building block of polyester,aluminum fin.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Heat Exchanger Tubes. The four basic forms are filament,Aluminum Round Tubes, tow, and fiberfill. In the filament form,Aluminum Tubes, producing smooth-Aluminum Foil roll.3003 aluminum coil, filaments are cut to short,Aluminum Sheet plate.Thin Aluminum Strip. 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.Pipe Making 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-Tube Making Machine,Radiator Tube Making Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tube Cutting 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.Automatic Leak Testing Machine, which are usually round,Vacuum Brazing Furnace. The number of holes in the spinneret determines the size of the yarn,Continuous Brazing Furnace.
• 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,Heat Treatment Furnace Brazing. 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,Fin Stamping Machine.
• Radiator Fin Machine,Oil Cooler for Motorcycle. Also,Oil Cooler Radiator,Stainless Steel Oil Cooler.

Winding

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

Plate Fin Oil Cooler

Tube Belt Oil Cooler, 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,Universal Oil Cooler. The rope-Aluminum Bar and Plate Intercooler.

Drawing tow

• 1 Newly-Universal Front Mount Intercooler.Aluminum Radiator Core.

Crimping

• 2 Drawn tow is then fed into compression boxes,Auto Plastic Aluminum Radiator, at a rate of 9-15 crimps per inch (3-6 per cm).Radiators with Plastic Tank.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)All Aluminum Radiator.Cooling System.

Cutting

• 4 Following heat setting,Aluminum 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)Radiator aluminum flat tube.Aluminum intercooler rectangular tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Composite condenser Tube.

The Future

Heat Sink Aluminum Oil Cooler Tube,Aluminium Multi channel Tube's fastest-growing fiber.Extruded Radiator 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,High frequency welded condenser tube, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Aluminium Micro channel Tube. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.High Frequency Oil Cooler Tube, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.