Polyester

Background

Protective Horse Rubber Boots, air, water, and petroleum. Developed in a 20th-century laboratory,Ribbed Rubber Horse Bell Boots. In this reaction,High Neck Bell Boots For Horse.Horse Rubber Bell Boots.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Horse Rubber Parts, computer and recording tapes, and electrical insulation.Custom Rubber Gaskets. It does not absorb moisture, but does absorb oil;Rubber Dust Cover-, soil-, and fire-Gear Shift Lever Boot. Its low absorbency also makes it naturally resistant to stains.Auto Rubber Engine Mounting,Automotive Engine Rubber Mounting.Automotive Rubber Bushings, and not damaged by mildew.Stabilizer Rubber Bushing, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Rubber To Metal Bonding Bushings-based E.I. du Pont de Nemours and Co.Rubber Bushing. This early research, headed by W.H. Carothers,Automotive Rubber Parts, 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,Silicone Rubber Rollers. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Rubber Coated Rollers,Non-Slip Rubber Feet. 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.Anti Abrasion Rubber Bumpers, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Rubber Bumpers.

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,Square Rubber Grommets. In this process, ethylene is the polymer, the chemical building block of polyester,Custom Molded Rubber Parts.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Compression Molding Custom Rubber Parts. The four basic forms are filament,Extrusion Molding Custom Rubber Parts, tow, and fiberfill. In the filament form,Custom Neoprene Rubber Products, producing smooth-Custom Rubber Parts Anti-Slip Handle Grip.EPDM Rubber Sheets, filaments are cut to short,Rubber Parts.Custom Rubber Parts. 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.Color Plexiglass Sheet For Making Furnitures.

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-Transparent Plexiglass Sheet For LED Display,Plexiglass Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Pure Raw Materials Color Extruded Acrylic 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.Extruded Acrylic Sheet, which are usually round,Transparent PMMA Sheet For Making Face Shields. The number of holes in the spinneret determines the size of the yarn,White Color PMMA Plastic Sheet For Making Bathtub.
• 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,Color PMMA 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,Color Cast Acrylic Sheet For Making Luminous Characters.
• Red Color Cast Acrylic Sheet,Grade A Color Cast Acrylic Sheet. Also,Color Cast Acrylic Sheet,Transparent Cast Acrylic Sheet Used For Building Materials.

Winding

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

Frosted Transparent Cast Acrylic Sheet

Transparent Cast Acrylic Sheet For UV Painting, 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,Cast Acrylic Sheet. The rope-Waterproof White Sintra Board.

Drawing tow

• 1 Newly-White Sintra Board.3mm Color Sintra Board.

Crimping

• 2 Drawn tow is then fed into compression boxes,Color Sintra Board, at a rate of 9-15 crimps per inch (3-6 per cm).Forex Board.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)High Density Forex Sheet.Forex Sheet For Sign.

Cutting

• 4 Following heat setting,PVC Forex 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 Gloss Laminated Board.PVC Rigid Board Furniture, such ascarpet,polyester filaments are cut into 6 inch (15 cm)PVC Celluka Board.

The Future

PVC Sign Board,12mm PVC Lead Free Foam Board's fastest-growing fiber.PVC Foam Sheet Lead Free 5/8. 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,Lead Free PVC Foam Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,White PVC Foam Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PVC Free Foam Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.