Polyester

Background

Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook, air, water, and petroleum. Developed in a 20th-century laboratory,Hollow Wall Anchor. In this reaction,Carnon Steel Yellow Zinc Plated Express Nail.Mushroom Head Stainless Steel Pin.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Stainless Steel Round Coupling Nut, computer and recording tapes, and electrical insulation.Stainless Steel Hex Coupling Nut with Holes. It does not absorb moisture, but does absorb oil;Coupling Nut-, soil-, and fire-Carbon Steel Yellow Zinc Plated Cut Anchor with Knurling. Its low absorbency also makes it naturally resistant to stains.Stainless Steel Drop in Anchor with Knurling and Lip,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling.Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling, and not damaged by mildew.Stainless Steel Drop in Anchor Without Knurling, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Drop in Anchor-based E.I. du Pont de Nemours and Co.Stainless Steel Chemical Anchor with Hex Nut and Washer. This early research, headed by W.H. Carothers,Carbon Steel Zinc Plated Chemical Anchor, 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,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Chemical Anchor,Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer. 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.Stainless Steel Sleeve Anchor with Fish Fins, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.

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,Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Protective Horse Rubber Boots. The four basic forms are filament,Ribbed Rubber Horse Bell Boots, tow, and fiberfill. In the filament form,High Neck Bell Boots For Horse, producing smooth-Horse Rubber Bell Boots.Horse Rubber Parts, filaments are cut to short,Custom Rubber Gaskets.Rubber Dust Cover. 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.Gear Shift Lever Boot.

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-Auto Rubber Engine Mounting,Automotive Engine Rubber Mounting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Automotive Rubber Bushings. 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.Stabilizer Rubber Bushing, which are usually round,Rubber To Metal Bonding Bushings. The number of holes in the spinneret determines the size of the yarn,Rubber Bushing.
• 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,Automotive 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,Silicone Rubber Rollers.
• Rubber Coated Rollers,Non-Slip Rubber Feet. Also,Anti Abrasion Rubber Bumpers,Rubber Bumpers.

Winding

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

Square Rubber Grommets

Custom Molded Rubber Parts, 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,Compression Molding Custom Rubber Parts. The rope-Extrusion Molding Custom Rubber Parts.

Drawing tow

• 1 Newly-Custom Neoprene Rubber Products.Custom Rubber Parts Anti-Slip Handle Grip.

Crimping

• 2 Drawn tow is then fed into compression boxes,EPDM Rubber Sheets, at a rate of 9-15 crimps per inch (3-6 per cm).Rubber Parts.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Custom Rubber Parts.Color Plexiglass Sheet For Making Furnitures.

Cutting

• 4 Following heat setting,Transparent Plexiglass Sheet For LED Display. 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)Plexiglass Sheet.Pure Raw Materials Color Extruded Acrylic Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Extruded Acrylic Sheet.

The Future

Transparent PMMA Sheet For Making Face Shields,White Color PMMA Plastic Sheet For Making Bathtub's fastest-growing fiber.Color PMMA 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,Color Cast Acrylic Sheet For Making Luminous Characters, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Red Color Cast Acrylic Sheet. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Grade A Color Cast Acrylic Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.