Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,PPR Copper Female Tee, computer and recording tapes, and electrical insulation.PPR Copper Male Tee. It does not absorb moisture, but does absorb oil;PPR Copper Female Socket-, soil-, and fire-PPR Copper Fittings. Its low absorbency also makes it naturally resistant to stains.PPR Male Adapter,Elbow with Female Coupling.Under Plaster Group, and not damaged by mildew.Double Female Elbow, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PPR Pipe Clip-based E.I. du Pont de Nemours and Co.PPR Female Union. This early research, headed by W.H. Carothers,PPR Female Threaded Union, 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,Plastic Union. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PPR Handle Wheel Stop Valves,PERT Stop Valve. 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.PPR Radiator Stop Valve 180°, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PPR Type Y Stop Valve.

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,PPR Stop Valve. In this process, ethylene is the polymer, the chemical building block of polyester,PPR Plastic Ball Valve 32mm.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PPR Plastic Ball Valve 40mm. The four basic forms are filament,PPR Fiber Glass Composite Pipes Sdr6 S2.5 Pn25, tow, and fiberfill. In the filament form,high tensile strength pure gum rubber sheet, producing smooth-Silicone CG Brown - 50A.Silicone CG Black - 50A, filaments are cut to short,General Purpose Rubber - 60A.NATURAL GUM RUBBER. 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.GASKET.

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-Owl Tea Light Candle Holder with Tealights,Colored Glass Lantern Candle Holder, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Decoration Rotary Tea Light Candlestick. 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.Metal Spinning Round Candle Holder, which are usually round,Wedding Table Centerpieces Rotary Candle Holder. The number of holes in the spinneret determines the size of the yarn,Tabletop Wedding Decorative Rotary Candle Holder.
• 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,Square Metal Candle Holder. 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,Geometric Metal Candle Holders.
• Table Decorative Candlestick Holder,Set Of 3 Black Candle Holders. Also,Angel Rotary Candle Holder,Reindeer Rotary Candle Holder.

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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Butterfly Rotary Candle Holder, 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,Colorful Glass Rotary Candle Holder. The rope-Glass Rotary Candle Holder.

Drawing tow

• 1 Newly-Rotary Tea Light Candle Holder.Cylinder Rotary Candle Holder.

Crimping

• 2 Drawn tow is then fed into compression boxes,Vikings Rotary Candle Holder, at a rate of 9-15 crimps per inch (3-6 per cm).Scandinavian Rotary Candle Holder.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kitten Spinning Candle Holder.Gold Carousel Rotary Candle Holder.

Cutting

• 4 Following heat setting,Halloween Rotary Candle Holder. 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)Rotary Candle Holder.Candle Holder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Food Grade Lactase Enzyme Powder CAS.NO 9031-11-2.

The Future

Enzyme Lactase powder for food lipase or galcatosidase,Lactase enzyme liquid tablet price lactase food powder's fastest-growing fiber.Food Grade Health Lactase Enzyme Powder. 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,β glucan, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Beta-glucan Liquid. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.α Galactosidase, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.