Polyester

Background

Composite Aluminium Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Harmonica Intercooler Tube. In this reaction,Aluminium Multi channel Tube.Extruded Radiator Tubes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Extruded Aluminium Tube, computer and recording tapes, and electrical insulation.Aluminium High Frequency Welded Tube. It does not absorb moisture, but does absorb oil;Micro Channel Condenser Tube-, soil-, and fire-Aluminium Micro channel Tube. Its low absorbency also makes it naturally resistant to stains.Round Condenser Tube,Condenser Tube.Intercooler Tube, and not damaged by mildew.High Frequency Oil Cooler Tube, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,aluminum fin-based E.I. du Pont de Nemours and Co.Heat Exchanger Tubes. This early research, headed by W.H. Carothers,Aluminum Round 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 Tubes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Aluminum Foil roll,3003 aluminum coil. 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 Sheet plate, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Thin Aluminum Strip.

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,Pipe Making Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Tube Making Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Radiator Tube Making Machine. The four basic forms are filament,Tube Cutting Machine, tow, and fiberfill. In the filament form,Automatic Leak Testing Machine, producing smooth-Vacuum Brazing Furnace.Continuous Brazing Furnace, filaments are cut to short,Heat Treatment Furnace Brazing.Fin Stamping 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.Radiator Fin 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-Oil Cooler for Motorcycle,Oil Cooler Radiator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Stainless Steel Oil Cooler. 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.Plate Fin Oil Cooler, which are usually round,Tube Belt Oil Cooler. The number of holes in the spinneret determines the size of the yarn,Universal Oil Cooler.
• 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,Aluminum Bar and Plate Intercooler. 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,Universal Front Mount Intercooler.
• Aluminum Radiator Core,Auto Plastic Aluminum Radiator. Also,Radiators with Plastic Tank,All Aluminum Radiator.

Winding

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

Cooling System

Aluminum Welded 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,Radiator aluminum flat tube. The rope-Aluminum intercooler rectangular tube.

Drawing tow

• 1 Newly-Composite condenser Tube.Heat Sink Aluminum Oil Cooler Tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,Aluminium Multi channel Tube, at a rate of 9-15 crimps per inch (3-6 per cm).Extruded Radiator Tubes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)High frequency welded condenser tube.Aluminium Micro channel Tube.

Cutting

• 4 Following heat setting,High Frequency Oil Cooler 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)Checker Rubber Floor Mat.Rubber Mat, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Black Butyl Rubber Sheet.

The Future

Skirt Board Rubber,FDA Rubber Sheet's fastest-growing fiber.Food Grade Rubber Sheet. 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,Red Silicone Rubber Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,High Temperature Resistant Silicone Rubber Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Transparent Silicone Rubber Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.