Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,24inch Cutter Suction Dredger, computer and recording tapes, and electrical insulation.River Sand Cutter Suction Dredger For Sale. It does not absorb moisture, but does absorb oil;18inch Sand Suction Dredger-, soil-, and fire-20inch Cutter Suction Sand Dredger. Its low absorbency also makes it naturally resistant to stains.Mining Cutter Suction Dredger,Sea Sand Dredger.Mini14 inch Cutter Suction Sand Dredger, and not damaged by mildew.18 inch Cutter Suction Dredger, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,18 inch cutter suction sand dredger-based E.I. du Pont de Nemours and Co.12 Inch Cutter Suction Dredger. This early research, headed by W.H. Carothers,16inch Cutter Suction Dredger, 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,Cutter Suction Dredger Sand Pumping Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sand Suction Dredging Equipment,18Inch River Sand Dredger. 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.300MM 12Inch Cutter Suction Dredger, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.18inch Desilting Mechanical Watermaster Dredger Machinery.

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,Fully Hydraulic Cutter Head 24 Suction Dredger Barge. In this process, ethylene is the polymer, the chemical building block of polyester,New 14 Inch Lake Dredging Equipment For Rock Dredge.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hydraulic Head 12inch River Sand Csd Dredger. The four basic forms are filament,Small 8 Inch Cutter Dredger Ship, tow, and fiberfill. In the filament form,Garment Processing Accessories, producing smooth-Bamboo Drawer Organizer.Laundry Basket, filaments are cut to short,Foldable Cutting Board.Folding Bowl. 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.Wood Poster Frame Hanger in Black for Photo Picture Canvas Artwork Art.

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-Hanger Sizer Garment Size,Blanket Hanger, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Magic Hangers Multifunctional Hanger. 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.Stainless Steel Magic Space Saver Storage Pants Hanger, which are usually round,Magic Hanger. The number of holes in the spinneret determines the size of the yarn,Velvet Kids Clothes Hangers.
• 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,Velvet Multi Purpose Hanger. 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,Velvet Hanger.
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Winding

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

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Plastic Coat Hanger Dimensions, 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,Professional Thick Plastic Coat Hanger Dimensions. The rope-Folding Hanger.

Drawing tow

• 1 Newly-Black Triangle Plastic Clothes Hangers for Suits.Adult Girls Panty and Bra Sets Stock with Hanger Poly Packing.

Crimping

• 2 Drawn tow is then fed into compression boxes,Plastic Terry cloth Blanket Hanger, at a rate of 9-15 crimps per inch (3-6 per cm).Foldable Washable Cloth Hanging Closet Organizer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Compressed Flat Vacuum Bag.Space Saver Compressed Bag.

Cutting

• 4 Following heat setting,Compressed Bag. 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)Display Plywood Clothes Hanger with Leopard Head.Wooden Cloth Hanger Rack, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Luxury Antique Wooden Shirt Hanger.

The Future

Wooden Hanger Anti Theft with Clips,Natural wood Pack Solid Wood Clothes Hangers's fastest-growing fiber.Wood Clothes Hangers. 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,Wooden Hanger, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Kn95 Masks With Respirator. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Prevention Key, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.