Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminium High Frequency Welded Tube, computer and recording tapes, and electrical insulation.Micro Channel Condenser Tube. It does not absorb moisture, but does absorb oil;Aluminium Micro channel Tube-, soil-, and fire-Round Condenser Tube. Its low absorbency also makes it naturally resistant to stains.Condenser Tube,Intercooler Tube.High Frequency Oil Cooler Tube, 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 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 Foil roll. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.3003 aluminum coil,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.Pipe Making 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,Tube Making Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Radiator Tube Making Machine.

The Manufacturing
Process

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

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 Radiator,Stainless Steel Oil Cooler, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Aluminum Welded Tube

Radiator aluminum flat 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,Aluminum intercooler rectangular tube. The rope-Composite condenser Tube.

Drawing tow

• 1 Newly-Heat Sink Aluminum Oil Cooler Tube.Aluminium Multi channel Tube.

Crimping

• 2 Drawn tow is then fed into compression boxes,Extruded Radiator Tubes, at a rate of 9-15 crimps per inch (3-6 per cm).High frequency welded condenser tube.

Setting

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

Cutting

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

The Future

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