Polyester

Background

Vacuum Brazing Furnace, air, water, and petroleum. Developed in a 20th-century laboratory,Continuous Brazing Furnace. In this reaction,Heat Treatment Furnace Brazing.Fin Stamping Machine.

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

History

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

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 intercooler rectangular tube. In this process, ethylene is the polymer, the chemical building block of polyester,Composite condenser Tube.

The Manufacturing
Process

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

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-Black Butyl Rubber Sheet,Skirt Board Rubber, is extruded through a slot to form long ribbons.

Drying

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

Ozone Resistant Viton Rubber Sheet

Abrasion Resistance Sheet 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,Abrasion Resistance Rubber Sheet. The rope-Mining Rubber Sheets.

Drawing tow

• 1 Newly-Mining Rubber Products.Nitrile Rubber Sheet Supplier.

Crimping

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

Setting

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

Cutting

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

The Future

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