Polyester

Background

Stainless Steel Chemical Anchor with Hex Nut and Washer, air, water, and petroleum. Developed in a 20th-century laboratory,Carbon Steel Zinc Plated Chemical Anchor. In this reaction,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor.Chemical Anchor.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer, computer and recording tapes, and electrical insulation.Stainless Steel Sleeve Anchor with Fish Fins. It does not absorb moisture, but does absorb oil;Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook-, soil-, and fire-Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut. Its low absorbency also makes it naturally resistant to stains.Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip,Protective Horse Rubber Boots.Ribbed Rubber Horse Bell Boots, and not damaged by mildew.High Neck Bell Boots For Horse, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Horse Rubber Bell Boots-based E.I. du Pont de Nemours and Co.Horse Rubber Parts. This early research, headed by W.H. Carothers,Custom Rubber Gaskets, 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 Dust Cover. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Gear Shift Lever Boot,Auto Rubber Engine Mounting. 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.Automotive Engine Rubber Mounting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Automotive Rubber Bushings.

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,Stabilizer Rubber Bushing. In this process, ethylene is the polymer, the chemical building block of polyester,Rubber To Metal Bonding Bushings.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Rubber Bushing. The four basic forms are filament,Automotive Rubber Parts, tow, and fiberfill. In the filament form,Silicone Rubber Rollers, producing smooth-Rubber Coated Rollers.Non-Slip Rubber Feet, filaments are cut to short,Anti Abrasion Rubber Bumpers.Rubber Bumpers. 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.Square Rubber Grommets.

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 Molded Rubber Parts,Compression Molding Custom Rubber Parts, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Extrusion Molding Custom Rubber Parts. 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.Custom Neoprene Rubber Products, which are usually round,Custom Rubber Parts Anti-Slip Handle Grip. The number of holes in the spinneret determines the size of the yarn,EPDM Rubber Sheets.
• 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,Rubber Parts. 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,Custom Rubber Parts.
• Color Plexiglass Sheet For Making Furnitures,Transparent Plexiglass Sheet For LED Display. Also,Plexiglass Sheet,Pure Raw Materials Color Extruded 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.

Extruded Acrylic Sheet

Transparent PMMA Sheet For Making Face Shields, 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,White Color PMMA Plastic Sheet For Making Bathtub. The rope-Color PMMA Sheet.

Drawing tow

• 1 Newly-Color Cast Acrylic Sheet For Making Luminous Characters.Red Color Cast Acrylic Sheet.

Crimping

• 2 Drawn tow is then fed into compression boxes,Grade A Color Cast Acrylic Sheet, at a rate of 9-15 crimps per inch (3-6 per cm).Color Cast Acrylic Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Transparent Cast Acrylic Sheet Used For Building Materials.Frosted Transparent Cast Acrylic Sheet.

Cutting

• 4 Following heat setting,Transparent Cast Acrylic Sheet For UV Painting. 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)Cast Acrylic Sheet.Waterproof White Sintra Board, such ascarpet,polyester filaments are cut into 6 inch (15 cm)White Sintra Board.

The Future

3mm Color Sintra Board,Color Sintra Board's fastest-growing fiber.Forex 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,High Density Forex Sheet, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Forex Sheet For Sign. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PVC Forex Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.