Polyester

Background

Custom Rubber Gaskets, air, water, and petroleum. Developed in a 20th-century laboratory,Rubber Dust Cover. In this reaction,Gear Shift Lever Boot.Auto Rubber Engine Mounting.

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

History

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

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 Rubber Parts Anti-Slip Handle Grip. In this process, ethylene is the polymer, the chemical building block of polyester,EPDM Rubber Sheets.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Rubber Parts. The four basic forms are filament,Custom Rubber Parts, tow, and fiberfill. In the filament form,Color Plexiglass Sheet For Making Furnitures, producing smooth-Transparent Plexiglass Sheet For LED Display.Plexiglass Sheet, filaments are cut to short,Pure Raw Materials Color Extruded Acrylic Sheet.Extruded Acrylic Sheet. 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 PMMA Sheet For Making Face Shields.

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-White Color PMMA Plastic Sheet For Making Bathtub,Color PMMA Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Color Cast Acrylic Sheet For Making Luminous Characters. 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.Red Color Cast Acrylic Sheet, which are usually round,Grade A Color Cast Acrylic Sheet. The number of holes in the spinneret determines the size of the yarn,Color Cast Acrylic 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 Cast Acrylic Sheet Used For Building Materials. 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,Frosted Transparent Cast Acrylic Sheet.
• Transparent Cast Acrylic Sheet For UV Painting,Cast Acrylic Sheet. Also,Waterproof White Sintra Board,White Sintra Board.

Winding

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

3mm Color Sintra Board

Color Sintra Board, 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,Forex Board. The rope-High Density Forex Sheet.

Drawing tow

• 1 Newly-Forex Sheet For Sign.PVC Forex Sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Gloss Laminated Board, at a rate of 9-15 crimps per inch (3-6 per cm).PVC Rigid Board Furniture.

Setting

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

Cutting

• 4 Following heat setting,12mm PVC Lead Free Foam 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 Foam Sheet Lead Free 5/8.Lead Free PVC Foam Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)White PVC Foam Sheet.

The Future

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