Polyester

Background

Display Blood Bank Refrigerator , air, water, and petroleum. Developed in a 20th-century laboratory,Big Blood Bank Refrigerator . In this reaction,Medical Refrigerator.Carbon Steel Yellow Zinc Plated Hit Anchor with Flange Nut.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Carbon Steel Yellow Zinc Plated Pin Anchor with Conical Washer, computer and recording tapes, and electrical insulation.Hit Anchor. It does not absorb moisture, but does absorb oil;Shield Anchor-, soil-, and fire-Carbon Steel Zinc Plated Hollow Wall Anchor. Its low absorbency also makes it naturally resistant to stains.Carbon Steel Zinc Plated Hollow Wall Anchor with O Hook,Hollow Wall Anchor.Carnon Steel Yellow Zinc Plated Express Nail, and not damaged by mildew.Mushroom Head Stainless Steel Pin, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Stainless Steel Round Coupling Nut-based E.I. du Pont de Nemours and Co.Stainless Steel Hex Coupling Nut with Holes. This early research, headed by W.H. Carothers,Coupling Nut, 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 Yellow Zinc Plated Cut Anchor with Knurling. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Stainless Steel Drop in Anchor with Knurling and Lip,Carbon Steel Yellow Zinc Plated Drop in Anchor with Knurling. 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.Carbon Steel Bluewhite Zinc Plated Drop in Anchor with Knurling, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Stainless Steel Drop in Anchor Without Knurling.

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,Drop in Anchor. In this process, ethylene is the polymer, the chemical building block of polyester,Stainless Steel Chemical Anchor with Hex Nut and Washer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Carbon Steel Zinc Plated Chemical Anchor. The four basic forms are filament,Carbon Steel Hot Dip Galvanized HDG Chemical Anchor, tow, and fiberfill. In the filament form,Chemical Anchor, producing smooth-Stainless Steel Sleeve Anchor with Hex Nut and Flat Washer.Stainless Steel Sleeve Anchor with Fish Fins, filaments are cut to short,Carbon Steel Zinc Plated Sleeve Anchor with Conical Nut and O Hook.Carbon Steel Bulewhite Zinc Plated Sleeve Anchor with Flange Nut. 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.Carbon Steel Zinc Plated Wedge Anchor with Stainless Clip.

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-Protective Horse Rubber Boots,Ribbed Rubber Horse Bell Boots, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,High Neck Bell Boots For Horse. 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.Horse Rubber Bell Boots, which are usually round,Horse Rubber Parts. The number of holes in the spinneret determines the size of the yarn,Custom Rubber Gaskets.
• 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 Dust Cover. 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,Gear Shift Lever Boot.
• Auto Rubber Engine Mounting,Automotive Engine Rubber Mounting. Also,Automotive Rubber Bushings,Stabilizer Rubber Bushing.

Winding

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

Rubber To Metal Bonding Bushings

Rubber Bushing, 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,Automotive Rubber Parts. The rope-Silicone Rubber Rollers.

Drawing tow

• 1 Newly-Rubber Coated Rollers.Non-Slip Rubber Feet.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Square Rubber Grommets.Custom Molded Rubber Parts.

Cutting

• 4 Following heat setting,Compression Molding Custom Rubber Parts. 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)Extrusion Molding Custom Rubber Parts.Custom Neoprene Rubber Products, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Custom Rubber Parts Anti-Slip Handle Grip.

The Future

EPDM Rubber Sheets,Rubber Parts's fastest-growing fiber.Custom Rubber Parts. 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 Plexiglass Sheet For Making Furnitures, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Transparent Plexiglass Sheet For LED Display. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Plexiglass Sheet, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.