Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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-Plexiglass Sheet,Pure Raw Materials Color Extruded Acrylic Sheet, is extruded through a slot to form long ribbons.

Drying

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

Transparent Cast Acrylic Sheet For UV Painting

Cast Acrylic 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,Waterproof White Sintra Board. The rope-White Sintra Board.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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