Polyester

Background

Papain, air, water, and petroleum. Developed in a 20th-century laboratory,Pure Catalase Powder Enzyme. In this reaction,Lactase.Flexible Rubber Hose For Dredge Discharging.

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

History

In 1926,Sea Sand Dredger-based E.I. du Pont de Nemours and Co.Mini14 inch Cutter Suction Sand Dredger. This early research, headed by W.H. Carothers,18 inch 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 1946,18 inch cutter suction sand dredger. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.12 Inch Cutter Suction Dredger,16inch Cutter Suction 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.Cutter Suction Dredger Sand Pumping Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Sand Suction Dredging Equipment.

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,18Inch River Sand Dredger. In this process, ethylene is the polymer, the chemical building block of polyester,300MM 12Inch Cutter Suction Dredger.

The Manufacturing
Process

Polyester is manufactured by one of several methods.18inch Desilting Mechanical Watermaster Dredger Machinery. The four basic forms are filament,Fully Hydraulic Cutter Head 24 Suction Dredger Barge, tow, and fiberfill. In the filament form,New 14 Inch Lake Dredging Equipment For Rock Dredge, producing smooth-Hydraulic Head 12inch River Sand Csd Dredger.Small 8 Inch Cutter Dredger Ship, filaments are cut to short,Garment Processing Accessories.Bamboo Drawer Organizer. 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.Laundry Basket.

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-Foldable Cutting Board,Folding Bowl, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Wood Poster Frame Hanger in Black for Photo Picture Canvas Artwork Art. 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.Hanger Sizer Garment Size, which are usually round,Blanket Hanger. The number of holes in the spinneret determines the size of the yarn,Magic Hangers Multifunctional Hanger.
• 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,Stainless Steel Magic Space Saver Storage Pants 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,Magic Hanger.
• Velvet Kids Clothes Hangers,Velvet Multi Purpose Hanger. Also,Velvet Hanger,Metal Shirt Hanger with Thickness Wire.

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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Metal Mini Clip Hanger, 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,Metal Shirt Hanger. The rope-Clear Plastic Hanger with Clips.

Drawing tow

• 1 Newly-Plastic Coat Hanger Dimensions.Professional Thick Plastic Coat Hanger Dimensions.

Crimping

• 2 Drawn tow is then fed into compression boxes,Folding Hanger, at a rate of 9-15 crimps per inch (3-6 per cm).Black Triangle Plastic Clothes Hangers for Suits.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Adult Girls Panty and Bra Sets Stock with Hanger Poly Packing.Plastic Terry cloth Blanket Hanger.

Cutting

• 4 Following heat setting,Foldable Washable Cloth Hanging Closet Organizer. 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)Compressed Flat Vacuum Bag.Space Saver Compressed Bag, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Compressed Bag.

The Future

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