Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

Drying

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

Cloth Inserted EPDM Rubber Sheet

High Quality Aging Resistant EPDM 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,FKM Rubber Sheet. The rope-High Temperature Resistant Viton Rubber Sheet.

Drawing tow

• 1 Newly-Ozone Resistant Viton Rubber Sheet.Abrasion Resistance Sheet Rubber.

Crimping

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

Setting

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

Cutting

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

The Future

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