Polyester

Background

Antique Distressed Color Wood Planter, air, water, and petroleum. Developed in a 20th-century laboratory,Graphite PTFE Yarn. In this reaction,Multiple PTFE Filament Yarn.PTFE Packing with Kynol Fiber Corners.

Polyester is used in the manufacture of many products, including clothing, home furnishings,ASME Spiral Wound Gasket, computer and recording tapes, and electrical insulation.glass-to-glass. It does not absorb moisture, but does absorb oil;Exhaust Spiral Wound Gaskets-, soil-, and fire-Special Materials Spiral Wound Gaskets. Its low absorbency also makes it naturally resistant to stains.Nuclear Spiral Wound Gasket,Kynol Fiber Packing.graphite gasket, and not damaged by mildew.Carbonized Fiber Packing with Graphite, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Carbonized Fiber Packing-based E.I. du Pont de Nemours and Co.graphite gasket. This early research, headed by W.H. Carothers,teflon ring 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,Corrugated Graphite Tapes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Braided Graphite Tube,PTFE Joint Sealant. 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.Joint Sealant Flange Gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Expanded PTFE Products.

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,eptfe. In this process, ethylene is the polymer, the chemical building block of polyester,ptfe joint sealant tape.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Graphite Packing With PTFE Impregnated. The four basic forms are filament,Corrugated Graphite Tapes, tow, and fiberfill. In the filament form,CGFO Packing, producing smooth-Kynol Fiber Packing.Standard Spiral Wound Gasket, filaments are cut to short,Special Materials Spiral Wound Gaskets.Spiral Wound Gaskets. 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.CGFO 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-Graphite Die Formed Rings,Graphite Die-formed Rings, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Graphite Fiber Braided Gland Packing. 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.Graphite PTFE Filament Packing, which are usually round,Expanded PTFE Spiral Wound Gasket Filler Material. The number of holes in the spinneret determines the size of the yarn,PTFE Yarn.
• 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,PTFE Porous Membrane. 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,PTFE Membranes.
• Expanded PTFE Sheet,PTFE Sheets. Also,PTFE Packing,Expanded PTFE Gasket.

Winding

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

Pipe Thread Sealing Cord

PTFE Gaskets, 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,Tanged Metal Reinforced Graphite Gasket. The rope-Tanged Metal Reinforced Graphite Gasket.

Drawing tow

• 1 Newly-Graphite Gasket Reinforced With Metal Mesh.Graphite Gasket Reinforced With Metal Foil.

Crimping

• 2 Drawn tow is then fed into compression boxes,Pure Expanded Graphite Gasket, at a rate of 9-15 crimps per inch (3-6 per cm).Pure Expanded Graphite Gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Sintered Neodymium Iron Boron NdFeB Magnets.Industrial Magnets.

Cutting

• 4 Following heat setting,Oil Filter 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)Magnetic Filtration.Magnetic DC Electric Motors, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Magnetic Separation.

The Future

Magnetic Hook Set,Sintered Neodymium Magnetic Hook Assembly's fastest-growing fiber.Pot Magnet Assemblies. 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,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Strong Neodymium Magnets. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Block Strong Neodymium Magnets, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.