Polyester

Background

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

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

History

In 1926,Corrugated Graphite Tapes-based E.I. du Pont de Nemours and Co.CGFO Packing. This early research, headed by W.H. Carothers,Kynol Fiber Packing, 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,Standard Spiral Wound Gasket. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Special Materials Spiral Wound Gaskets,Spiral Wound Gaskets. 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.CGFO Packing, 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 Die-formed Rings. In this process, ethylene is the polymer, the chemical building block of polyester,Graphite Fiber Braided Gland Packing.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Graphite PTFE Filament Packing. The four basic forms are filament,Expanded PTFE Spiral Wound Gasket Filler Material, tow, and fiberfill. In the filament form,PTFE Yarn, producing smooth-PTFE Porous Membrane.PTFE Membranes, filaments are cut to short,Expanded PTFE Sheet.PTFE Sheets. 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.PTFE Packing.

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-Expanded PTFE Gasket,Pipe Thread Sealing Cord, is extruded through a slot to form long ribbons.

Drying

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

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 Filtration

Magnetic DC Electric Motors, 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 Separation. The rope-Magnetic Hook Set.

Drawing tow

• 1 Newly-Sintered Neodymium Magnetic Hook Assembly.Pot Magnet Assemblies.

Crimping

• 2 Drawn tow is then fed into compression boxes,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole, at a rate of 9-15 crimps per inch (3-6 per cm).Strong Neodymium Magnets.

Setting

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

Cutting

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

The Future

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