Polyester

Background

Harmonica Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Intercooler tubes. In this reaction,aluminum fin.Heat Exchanger Tubes.

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

History

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

The Manufacturing
Process

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

Drying

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

Intercooler rectangular tube

Composite Aluminium 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,Harmonica Intercooler Tube. The rope-Aluminium Multi channel Tube.

Drawing tow

• 1 Newly-Extruded Radiator Tubes.Extruded Aluminium Tube.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Condenser 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)Intercooler Tube.High Frequency Oil Cooler Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)aluminum fin.

The Future

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