Polyester

Background

Heat Exchanger Tubes, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Round Tubes. In this reaction,Aluminum Tubes.Aluminum Foil roll.

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

History

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

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,Plate Fin Oil Cooler. In this process, ethylene is the polymer, the chemical building block of polyester,Tube Belt Oil Cooler.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Universal Oil Cooler. The four basic forms are filament,Aluminum Bar and Plate Intercooler, tow, and fiberfill. In the filament form,Universal Front Mount Intercooler, producing smooth-Aluminum Radiator Core.Auto Plastic Aluminum Radiator, filaments are cut to short,Radiators with Plastic Tank.All Aluminum Radiator. 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.Cooling System.

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 Welded Tube,Radiator aluminum flat tube, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum intercooler rectangular tube. 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.Composite condenser Tube, which are usually round,Heat Sink Aluminum Oil Cooler Tube. The number of holes in the spinneret determines the size of the yarn,Aluminium Multi channel 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,Extruded Radiator Tubes. 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,High frequency welded condenser tube.
• Aluminium Micro channel Tube,High Frequency Oil Cooler Tube. Also,Checker Rubber Floor Mat,Rubber Mat.

Winding

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

Black Butyl Rubber Sheet

Skirt Board Rubber, 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,FDA Rubber Sheet. The rope-Food Grade Rubber Sheet.

Drawing tow

• 1 Newly-Red Silicone Rubber Sheet.High Temperature Resistant Silicone Rubber Sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,Transparent Silicone Rubber Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).High Temperature Resistant EPDM Rubber Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cloth Inserted EPDM Rubber Sheet.High Quality Aging Resistant EPDM Rubber Sheet.

Cutting

• 4 Following heat setting,FKM 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)High Temperature Resistant Viton Rubber Sheet.Ozone Resistant Viton Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Abrasion Resistance Sheet Rubber.

The Future

Abrasion Resistance Rubber Sheet,Mining Rubber Sheets's fastest-growing fiber.Mining Rubber Products. 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,Nitrile Rubber Sheet Supplier, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,NBR Rubber Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Black Oil Resistant NBR 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.