Polyester

Background

Aluminum Bar, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Tubes. In this reaction,Extruded Aluminium Tube.Extruded Aluminium Tube.

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

History

In 1926,Heat Exchanger Tubes-based E.I. du Pont de Nemours and Co.Aluminum Round Tubes. This early research, headed by W.H. Carothers,Aluminum Condenser Tubes, 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 Radiator Tubes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Aluminum Tubes,Aluminum Sheet plate. 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.Thin Aluminum Strip, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum fin.

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 Raw Material. In this process, ethylene is the polymer, the chemical building block of polyester,Automatic Core Assembly Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Core Assembly Machine. The four basic forms are filament,Pipe Making Machine, tow, and fiberfill. In the filament form,Tube Making Machine, producing smooth-Radiator Tube Making Machine.Tube Machine, filaments are cut to short,Tube Cutting Machine.Condenser Leak Test Machine. 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.Automatic Leak Testing 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-Leak Test Machine,Vacuum Brazing Furnace, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum Brazing Furnace. 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.Heat Treatment Furnace Brazing, which are usually round,Roller Fin Machines. The number of holes in the spinneret determines the size of the yarn,Fin Stamping Machine.
• 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,High Speed Fin Machine. 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 Punching Press.
• Tube and Fin Aluminum Intercooler,Aluminum Intercooler Core. Also,Aluminum Bar and Plate Intercooler,Turbo Intercooler.

Winding

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

Radiators with Plastic Tank

Automotive Radiator, 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,All Aluminum Radiator. The rope-Cooling System.

Drawing tow

• 1 Newly-Cladded Aluminum Radiator Tube.Aluminum Welded Tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,Radiator aluminum flat tube, at a rate of 9-15 crimps per inch (3-6 per cm).Aluminum radiator tube.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Aluminum intercooler rectangular tube.Intercooler rectangular tube.

Cutting

• 4 Following heat setting,Composite 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)Harmonica Intercooler Tube.Aluminium Multi channel Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Extruded Radiator Tubes.

The Future

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