Polyester

Background

Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip. In this reaction,Protective Horse Rubber Boots.Ribbed Rubber Horse Bell Boots.

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

History

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

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,Anti Abrasion Rubber Bumpers. In this process, ethylene is the polymer, the chemical building block of polyester,Rubber Bumpers.

The Manufacturing
Process

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

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-Custom Rubber Parts,Color Plexiglass Sheet For Making Furnitures, is extruded through a slot to form long ribbons.

Drying

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

Color Cast Acrylic Sheet

Transparent Cast Acrylic Sheet Used For Building Materials, 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,Frosted Transparent Cast Acrylic Sheet. The rope-Transparent Cast Acrylic Sheet For UV Painting.

Drawing tow

• 1 Newly-Cast Acrylic Sheet.Waterproof White Sintra Board.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Color Sintra Board.Forex Board.

Cutting

• 4 Following heat setting,High Density 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)Forex Sheet For Sign.PVC Forex Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)High Gloss Laminated Board.

The Future

PVC Rigid Board Furniture,PVC Celluka Board's fastest-growing fiber.PVC Sign 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,12mm PVC Lead Free Foam Board, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PVC Foam Sheet Lead Free 5/8. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Lead Free PVC 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.