Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Transparent Cast Acrylic Sheet Used For Building Materials

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

Drawing tow

• 1 Newly-Waterproof White Sintra Board.White Sintra Board.

Crimping

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

Setting

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

Cutting

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

The Future

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