Polyester

Background

Radiator Tube Making Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Tube Cutting Machine. In this reaction,Automatic Leak Testing Machine.Vacuum Brazing Furnace.

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

History

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

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,Cooling System. In this process, ethylene is the polymer, the chemical building block of polyester,Aluminum Welded Tube.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Radiator aluminum flat tube. The four basic forms are filament,Aluminum intercooler rectangular tube, tow, and fiberfill. In the filament form,Composite condenser Tube, producing smooth-Heat Sink Aluminum Oil Cooler Tube.Aluminium Multi channel Tube, filaments are cut to short,Extruded Radiator Tubes.High frequency welded 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.Aluminium Micro channel 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-High Frequency Oil Cooler Tube,Checker Rubber Floor Mat, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Rubber Mat. 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.Black Butyl Rubber Sheet, which are usually round,Skirt Board Rubber. The number of holes in the spinneret determines the size of the yarn,FDA Rubber Sheet.
• 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,Food Grade Rubber Sheet. 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,Red Silicone Rubber Sheet.
• High Temperature Resistant Silicone Rubber Sheet,Transparent Silicone Rubber Sheet. Also,High Temperature Resistant EPDM Rubber Sheet,Cloth Inserted EPDM 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 Quality Aging Resistant EPDM Rubber Sheet

FKM 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 Viton Rubber Sheet. The rope-Ozone Resistant Viton Rubber Sheet.

Drawing tow

• 1 Newly-Abrasion Resistance Sheet Rubber.Abrasion Resistance Rubber Sheet.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Black Oil Resistant NBR 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)SBR Rubber Sheet.Industrial Black SBR Rubber Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Vulcanized SBR Rubber Sheet.

The Future

Abrasion Resistant Red SBR Rubber Sheet,Red SBR Rubber Sheet's fastest-growing fiber.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,Black SBR Cloth Insertion Rubber Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Groove Rubber Stable Mat. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hexagon Cow Stable Mat, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.