Polyester

Background

Automatic Core Assembly Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Core Assembly Machine. In this reaction,Pipe Making Machine.Tube Making Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Radiator Tube Making Machine, computer and recording tapes, and electrical insulation.Tube Machine. It does not absorb moisture, but does absorb oil;Tube Cutting Machine-, soil-, and fire-Condenser Leak Test Machine. Its low absorbency also makes it naturally resistant to stains.Automatic Leak Testing Machine,Leak Test Machine.Vacuum Brazing Furnace, and not damaged by mildew.Aluminum Brazing Furnace, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Heat Treatment Furnace Brazing-based E.I. du Pont de Nemours and Co.Roller Fin Machines. This early research, headed by W.H. Carothers,Fin Stamping 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,High Speed Fin Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Fin Punching Press,Tube and Fin Aluminum Intercooler. 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.Aluminum Intercooler Core, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum Bar and Plate Intercooler.

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,Turbo Intercooler. In this process, ethylene is the polymer, the chemical building block of polyester,Radiators with Plastic Tank.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Automotive Radiator. The four basic forms are filament,All Aluminum Radiator, tow, and fiberfill. In the filament form,Cooling System, producing smooth-Cladded Aluminum Radiator Tube.Aluminum Welded Tube, filaments are cut to short,Radiator aluminum flat tube.Aluminum radiator tube. 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.Aluminum intercooler rectangular tube.

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-Intercooler rectangular tube,Composite Aluminium Tube, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Harmonica Intercooler Tube. 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.Aluminium Multi channel Tube, which are usually round,Extruded Radiator Tubes. The number of holes in the spinneret determines the size of the yarn,Extruded Aluminium 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,Aluminium High Frequency Welded 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,Micro Channel Condenser Tube.
• Aluminium Micro channel Tube,Round Condenser Tube. Also,Condenser Tube,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.

High Frequency Oil Cooler Tube

aluminum fin, 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,Heat Exchanger Tubes. The rope-Aluminum Round Tubes.

Drawing tow

• 1 Newly-Aluminum Tubes.Aluminum Foil roll.

Crimping

• 2 Drawn tow is then fed into compression boxes,3003 aluminum coil, at a rate of 9-15 crimps per inch (3-6 per cm).Aluminum Sheet plate.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Thin Aluminum Strip.Pipe Making Machine.

Cutting

• 4 Following heat setting,Tube Making Machine. 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 Tube Making Machine.Tube Cutting Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Automatic Leak Testing Machine.

The Future

Vacuum Brazing Furnace,Continuous Brazing Furnace's fastest-growing fiber.Heat Treatment Furnace Brazing. 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,Fin Stamping Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Radiator Fin Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Oil Cooler for Motorcycle, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.