Polyester

Background

Bromelain, air, water, and petroleum. Developed in a 20th-century laboratory,Papain. In this reaction,Pure Catalase Powder Enzyme.Lactase.

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

History

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

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,Sand Suction Dredging Equipment. In this process, ethylene is the polymer, the chemical building block of polyester,18Inch River Sand Dredger.

The Manufacturing
Process

Polyester is manufactured by one of several methods.300MM 12Inch Cutter Suction Dredger. The four basic forms are filament,18inch Desilting Mechanical Watermaster Dredger Machinery, tow, and fiberfill. In the filament form,Fully Hydraulic Cutter Head 24 Suction Dredger Barge, producing smooth-New 14 Inch Lake Dredging Equipment For Rock Dredge.Hydraulic Head 12inch River Sand Csd Dredger, filaments are cut to short,Small 8 Inch Cutter Dredger Ship.Garment Processing Accessories. 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.Bamboo Drawer Organizer.

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-Laundry Basket,Foldable Cutting Board, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Metal Shirt Hanger with Thickness Wire

Travel Portable Laundry Hooks Pins Clips 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 Mini Clip Hanger. The rope-Metal Shirt Hanger.

Drawing tow

• 1 Newly-Clear Plastic Hanger with Clips.Plastic Coat Hanger Dimensions.

Crimping

• 2 Drawn tow is then fed into compression boxes,Professional Thick Plastic Coat Hanger Dimensions, at a rate of 9-15 crimps per inch (3-6 per cm).Folding Hanger.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Black Triangle Plastic Clothes Hangers for Suits.Adult Girls Panty and Bra Sets Stock with Hanger Poly Packing.

Cutting

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

The Future

Compressed Bag,Display Plywood Clothes Hanger with Leopard Head's fastest-growing fiber.Wooden Cloth Hanger Rack. 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,Luxury Antique Wooden Shirt Hanger, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Wooden Hanger Anti Theft with Clips. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Natural wood Pack Solid 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.