Polyester

Background

Round Condenser Tube, air, water, and petroleum. Developed in a 20th-century laboratory,Condenser Tube. In this reaction,Intercooler Tube.High Frequency Oil Cooler Tube.

Polyester is used in the manufacture of many products, including clothing, home furnishings,aluminum fin, computer and recording tapes, and electrical insulation.Heat Exchanger Tubes. It does not absorb moisture, but does absorb oil;Aluminum Round Tubes-, soil-, and fire-Aluminum Tubes. Its low absorbency also makes it naturally resistant to stains.Aluminum Foil roll,3003 aluminum coil.Aluminum Sheet plate, and not damaged by mildew.Thin Aluminum Strip, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Pipe Making Machine-based E.I. du Pont de Nemours and Co.Tube Making Machine. This early research, headed by W.H. Carothers,Radiator Tube Making 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,Tube Cutting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Automatic Leak Testing Machine,Vacuum Brazing Furnace. 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.Continuous Brazing Furnace, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Heat Treatment Furnace Brazing.

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,Fin Stamping Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Radiator Fin Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Oil Cooler for Motorcycle. The four basic forms are filament,Oil Cooler Radiator, tow, and fiberfill. In the filament form,Stainless Steel Oil Cooler, producing smooth-Plate Fin Oil Cooler.Tube Belt Oil Cooler, filaments are cut to short,Universal Oil Cooler.Aluminum Bar and Plate Intercooler. 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.Universal Front Mount Intercooler.

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-Aluminum Radiator Core,Auto Plastic Aluminum Radiator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Radiators with Plastic Tank. 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.All Aluminum Radiator, which are usually round,Cooling System. The number of holes in the spinneret determines the size of the yarn,Aluminum Welded 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,Radiator aluminum flat 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,Aluminum intercooler rectangular tube.
• Composite condenser Tube,Heat Sink Aluminum Oil Cooler Tube. Also,Aluminium Multi channel Tube,Extruded Radiator Tubes.

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 welded condenser tube

Aluminium Micro 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,High Frequency Oil Cooler Tube. The rope-Checker Rubber Floor Mat.

Drawing tow

• 1 Newly-Rubber Mat.Black Butyl Rubber Sheet.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Food Grade Rubber Sheet.Red Silicone Rubber Sheet.

Cutting

• 4 Following heat setting,High Temperature Resistant Silicone 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)Transparent Silicone Rubber Sheet.High Temperature Resistant EPDM Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cloth Inserted EPDM Rubber Sheet.

The Future

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