Polyester

Background

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

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

History

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

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,Expanded PTFE Products. In this process, ethylene is the polymer, the chemical building block of polyester,eptfe.

The Manufacturing
Process

Polyester is manufactured by one of several methods.ptfe joint sealant tape. The four basic forms are filament,Graphite Packing With PTFE Impregnated, tow, and fiberfill. In the filament form,Corrugated Graphite Tapes, producing smooth-CGFO Packing.Kynol Fiber Packing, filaments are cut to short,Standard Spiral Wound Gasket.Special Materials 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.Spiral Wound Gaskets.

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-CGFO Packing,Graphite Die Formed Rings, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Expanded PTFE Gasket

Pipe Thread Sealing Cord, 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,PTFE Gaskets. The rope-Tanged Metal Reinforced Graphite Gasket.

Drawing tow

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

Crimping

• 2 Drawn tow is then fed into compression boxes,Graphite Gasket Reinforced With Metal Foil, 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)Pure Expanded Graphite Gasket.Sintered Neodymium Iron Boron NdFeB Magnets.

Cutting

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

The Future

Magnetic Separation,Magnetic Hook Set's fastest-growing fiber.Sintered Neodymium Magnetic Hook Assembly. 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,Pot Magnet Assemblies, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.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.