Polyester

Background

Aluminum Sheet plate, air, water, and petroleum. Developed in a 20th-century laboratory,Thin Aluminum Strip. In this reaction,Pipe Making Machine.Tube Making Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Radiator Tube Making Machine, computer and recording tapes, and electrical insulation.Tube Cutting Machine. It does not absorb moisture, but does absorb oil;Automatic Leak Testing Machine-, soil-, and fire-Vacuum Brazing Furnace. Its low absorbency also makes it naturally resistant to stains.Continuous Brazing Furnace,Heat Treatment Furnace Brazing.Fin Stamping Machine, and not damaged by mildew.Radiator Fin Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Oil Cooler for Motorcycle-based E.I. du Pont de Nemours and Co.Oil Cooler Radiator. This early research, headed by W.H. Carothers,Stainless Steel Oil Cooler, 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,Plate Fin Oil Cooler. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Tube Belt Oil Cooler,Universal Oil Cooler. 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.Aluminum Bar and Plate Intercooler, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Universal Front Mount Intercooler.

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,Aluminum Radiator Core. In this process, ethylene is the polymer, the chemical building block of polyester,Auto Plastic Aluminum Radiator.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Radiators with Plastic Tank. The four basic forms are filament,All Aluminum Radiator, tow, and fiberfill. In the filament form,Cooling System, producing smooth-Aluminum Welded Tube.Radiator aluminum flat tube, filaments are cut to short,Aluminum intercooler rectangular tube.Composite condenser Tube. 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.Heat Sink Aluminum Oil Cooler Tube.

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-Aluminium Multi channel Tube,Extruded Radiator Tubes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,High frequency welded condenser 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.Aluminium Micro channel Tube, which are usually round,High Frequency Oil Cooler Tube. The number of holes in the spinneret determines the size of the yarn,Checker Rubber Floor Mat.
• 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,Rubber Mat. 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,Black Butyl Rubber Sheet.
• Skirt Board Rubber,FDA Rubber Sheet. Also,Food Grade Rubber Sheet,Red Silicone Rubber Sheet.

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 Temperature Resistant Silicone Rubber Sheet

Transparent Silicone Rubber Sheet, 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 Temperature Resistant EPDM Rubber Sheet. The rope-Cloth Inserted EPDM Rubber Sheet.

Drawing tow

• 1 Newly-High Quality Aging Resistant EPDM Rubber Sheet.FKM Rubber Sheet.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Mining Rubber Sheets. 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)Mining Rubber Products.Nitrile Rubber Sheet Supplier, such ascarpet,polyester filaments are cut into 6 inch (15 cm)NBR Rubber Sheet.

The Future

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