Polyester

Background

Lactase, air, water, and petroleum. Developed in a 20th-century laboratory,Flexible Rubber Hose For Dredge Discharging. In this reaction,Mini Portable Sand Suction Dredger.Sea Sand Lifting Hydraulic Jet Suction Dredger.

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

History

In 1926,18 inch Cutter Suction Dredger-based E.I. du Pont de Nemours and Co.18 inch cutter suction sand dredger. This early research, headed by W.H. Carothers,12 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 1946,16inch Cutter Suction Dredger. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Cutter Suction Dredger Sand Pumping Machine,Sand Suction Dredging Equipment. 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.18Inch River Sand Dredger, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.300MM 12Inch Cutter Suction Dredger.

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 Desilting Mechanical Watermaster Dredger Machinery. In this process, ethylene is the polymer, the chemical building block of polyester,Fully Hydraulic Cutter Head 24 Suction Dredger Barge.

The Manufacturing
Process

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

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-Wood Poster Frame Hanger in Black for Photo Picture Canvas Artwork Art,Hanger Sizer Garment Size, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Blanket 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.Magic Hangers Multifunctional Hanger, which are usually round,Stainless Steel Magic Space Saver Storage Pants Hanger. The number of holes in the spinneret determines the size of the yarn,Magic 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,Velvet Kids Clothes Hangers. 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 Multi Purpose Hanger.
• Velvet Hanger,Metal Shirt Hanger with Thickness Wire. Also,Travel Portable Laundry Hooks Pins Clips Hanger,Metal Mini Clip 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

Clear Plastic Hanger with Clips, 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,Plastic Coat Hanger Dimensions. The rope-Professional Thick Plastic Coat Hanger Dimensions.

Drawing tow

• 1 Newly-Folding Hanger.Black Triangle Plastic Clothes Hangers for Suits.

Crimping

• 2 Drawn tow is then fed into compression boxes,Adult Girls Panty and Bra Sets Stock with Hanger Poly Packing, at a rate of 9-15 crimps per inch (3-6 per cm).Plastic Terry cloth Blanket Hanger.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Foldable Washable Cloth Hanging Closet Organizer.Compressed Flat Vacuum Bag.

Cutting

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

The Future

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