Polyester

Background

Graphite PTFE Yarn, air, water, and petroleum. Developed in a 20th-century laboratory,Multiple PTFE Filament Yarn. In this reaction,PTFE Packing with Kynol Fiber Corners.ASME Spiral Wound Gasket.

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

History

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

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,ptfe joint sealant tape. In this process, ethylene is the polymer, the chemical building block of polyester,Graphite Packing With PTFE Impregnated.

The Manufacturing
Process

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

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 Fiber Braided Gland Packing, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

PTFE Gaskets

Tanged Metal Reinforced Graphite Gasket, 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-Graphite Gasket Reinforced With Metal Mesh.

Drawing tow

• 1 Newly-Graphite Gasket Reinforced With Metal Foil.Pure Expanded Graphite Gasket.

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).Sintered Neodymium Iron Boron NdFeB Magnets.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Industrial Magnets.Oil Filter Magnets.

Cutting

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

The Future

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