Polyester

Background

Carbonized Fiber Packing, air, water, and petroleum. Developed in a 20th-century laboratory,graphite gasket. In this reaction,teflon ring gasket.Corrugated Graphite Tapes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Braided Graphite Tube, computer and recording tapes, and electrical insulation.PTFE Joint Sealant. It does not absorb moisture, but does absorb oil;Joint Sealant Flange Gasket-, soil-, and fire-Expanded PTFE Products. Its low absorbency also makes it naturally resistant to stains.eptfe,ptfe joint sealant tape.Graphite Packing With PTFE Impregnated, and not damaged by mildew.Corrugated Graphite Tapes, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,CGFO Packing-based E.I. du Pont de Nemours and Co.Kynol Fiber Packing. This early research, headed by W.H. Carothers,Standard Spiral Wound Gasket, 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,Special Materials Spiral Wound Gaskets. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Spiral Wound Gaskets,CGFO Packing. 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.Graphite Die Formed Rings, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Graphite Die-formed Rings.

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,Graphite Fiber Braided Gland Packing. In this process, ethylene is the polymer, the chemical building block of polyester,Graphite PTFE Filament Packing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Expanded PTFE Spiral Wound Gasket Filler Material. The four basic forms are filament,PTFE Yarn, tow, and fiberfill. In the filament form,PTFE Porous Membrane, producing smooth-PTFE Membranes.Expanded PTFE Sheet, filaments are cut to short,PTFE Sheets.PTFE Packing. 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.Expanded PTFE 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-Pipe Thread Sealing Cord,PTFE Gaskets, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Tanged Metal Reinforced Graphite Gasket. 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.Tanged Metal Reinforced Graphite Gasket, which are usually round,Graphite Gasket Reinforced With Metal Mesh. The number of holes in the spinneret determines the size of the yarn,Graphite Gasket Reinforced With Metal Foil.
• 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,Pure Expanded Graphite 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,Pure Expanded Graphite Gasket.
• Sintered Neodymium Iron Boron NdFeB Magnets,Industrial Magnets. Also,Oil Filter Magnets,Magnetic Filtration.

Winding

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

Magnetic DC Electric Motors

Magnetic Separation, 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,Magnetic Hook Set. The rope-Sintered Neodymium Magnetic Hook Assembly.

Drawing tow

• 1 Newly-Pot Magnet Assemblies.Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole.

Crimping

• 2 Drawn tow is then fed into compression boxes,Strong Neodymium Magnets, at a rate of 9-15 crimps per inch (3-6 per cm).Block Strong Neodymium Magnets.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Irregular Shape Neodymium Magnets.Rare Earth Permanent Magnets.

Cutting

• 4 Following heat setting,Permanent Magnet Rotors. 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)Cotton Tape.High Density Double Sided Cloth Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Construction Tape.

The Future

Cloth Tapes,Strong Based Double Sided Tape's fastest-growing fiber.High Density Double Sided Rubber Cloth Tape. 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,PET Tape, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Oily Double Sided Tape. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Double Sided Tape For Embroidery, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.