Polyester

Background

PPR BRASS FITTING, air, water, and petroleum. Developed in a 20th-century laboratory,PPR FITTINGS. In this reaction,PPR Double Female Elbow.Pert Pipe.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Pex-a Evoh Pipes, computer and recording tapes, and electrical insulation.Pex-A Pipe. It does not absorb moisture, but does absorb oil;PPR Copper Coupler-, soil-, and fire-PPR Copper Reducer. Its low absorbency also makes it naturally resistant to stains.PPR Copper Elbow 90°,PPR Copper Elbow 45°.PPR Copper Reduction Tee, and not damaged by mildew.PPR Copper Female Tee, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PPR Copper Male Tee-based E.I. du Pont de Nemours and Co.PPR Copper Female Socket. This early research, headed by W.H. Carothers,PPR Copper Fittings, 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,PPR Male Adapter. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Elbow with Female Coupling,Under Plaster Group. 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.Double Female Elbow, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PPR Pipe Clip.

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 Female Union. In this process, ethylene is the polymer, the chemical building block of polyester,PPR Female Threaded Union.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Plastic Union. The four basic forms are filament,PPR Handle Wheel Stop Valves, tow, and fiberfill. In the filament form,PERT Stop Valve, producing smooth-PPR Radiator Stop Valve 180°.PPR Type Y Stop Valve, filaments are cut to short,PPR Stop Valve.PPR Plastic Ball Valve 32mm. 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.PPR Plastic Ball Valve 40mm.

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-PPR Fiber Glass Composite Pipes Sdr6 S2.5 Pn25,high tensile strength pure gum rubber sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone CG Brown - 50A. 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.Silicone CG Black - 50A, which are usually round,General Purpose Rubber - 60A. The number of holes in the spinneret determines the size of the yarn,NATURAL GUM RUBBER.
• 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,GASKET. 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,Owl Tea Light Candle Holder with Tealights.
• Colored Glass Lantern Candle Holder,Decoration Rotary Tea Light Candlestick. Also,Metal Spinning Round Candle Holder,Wedding Table Centerpieces 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.

Tabletop Wedding Decorative Rotary Candle Holder

Square Metal 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,Geometric Metal Candle Holders. The rope-Table Decorative Candlestick Holder.

Drawing tow

• 1 Newly-Set Of 3 Black Candle Holders.Angel Rotary Candle Holder.

Crimping

• 2 Drawn tow is then fed into compression boxes,Reindeer Rotary Candle Holder, at a rate of 9-15 crimps per inch (3-6 per cm).Tree Tower Spinning Tea light Candle Holder.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Butterfly Rotary Candle Holder.Colorful Glass Rotary Candle Holder.

Cutting

• 4 Following heat setting,Glass 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 Tea Light Candle Holder.Cylinder Rotary Candle Holder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Vikings Rotary Candle Holder.

The Future

Scandinavian Rotary Candle Holder,Kitten Spinning Candle Holder's fastest-growing fiber.Gold Carousel Rotary Candle Holder. 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,Halloween Rotary Candle Holder, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Rotary Candle Holder. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Candle Holder, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.