Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Heat Treatment Furnace Brazing. The four basic forms are filament,Fin Stamping Machine, tow, and fiberfill. In the filament form,Radiator Fin Machine, producing smooth-Oil Cooler for Motorcycle.Oil Cooler Radiator, filaments are cut to short,Stainless Steel Oil Cooler.Plate Fin 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.Tube Belt 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-Universal Oil Cooler,Aluminum Bar and Plate Intercooler, is extruded through a slot to form long ribbons.

Drying

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

Heat Sink Aluminum Oil Cooler Tube

Aluminium Multi channel 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,Extruded Radiator Tubes. The rope-High frequency welded condenser tube.

Drawing tow

• 1 Newly-Aluminium Micro channel Tube.High Frequency Oil Cooler Tube.

Crimping

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

Setting

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

Cutting

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

The Future

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