Polyester

Background

Extruded Aluminium Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminium High Frequency Welded Tube. In this reaction,Micro Channel Condenser Tube.Aluminium Micro channel Tube.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Continuous Brazing Furnace. The four basic forms are filament,Heat Treatment Furnace Brazing, tow, and fiberfill. In the filament form,Fin Stamping Machine, producing smooth-Radiator Fin Machine.Oil Cooler for Motorcycle, filaments are cut to short,Oil Cooler Radiator.Stainless Steel Oil Cooler. 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.Plate Fin Oil Cooler.

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 Belt Oil Cooler,Universal Oil Cooler, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum Bar and Plate 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.Universal Front Mount Intercooler, which are usually round,Aluminum Radiator Core. The number of holes in the spinneret determines the size of the yarn,Auto Plastic 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,Radiators with Plastic Tank. 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,All Aluminum Radiator.
• Cooling System,Aluminum Welded Tube. Also,Radiator aluminum flat 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.

Composite condenser Tube

Heat Sink Aluminum Oil Cooler 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,Aluminium Multi channel Tube. The rope-Extruded Radiator Tubes.

Drawing tow

• 1 Newly-High frequency welded condenser tube.Aluminium Micro channel Tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Frequency Oil Cooler Tube, at a rate of 9-15 crimps per inch (3-6 per cm).Checker Rubber Floor Mat.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Rubber Mat.Black Butyl Rubber Sheet.

Cutting

• 4 Following heat setting,Skirt Board Rubber. 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)FDA Rubber Sheet.Food Grade Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Red Silicone Rubber Sheet.

The Future

High Temperature Resistant Silicone Rubber Sheet,Transparent Silicone Rubber Sheet's fastest-growing fiber.High Temperature Resistant EPDM 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,Cloth Inserted EPDM Rubber Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,High Quality Aging Resistant EPDM Rubber Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FKM 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.