Polyester

Background

Metal Planter, air, water, and petroleum. Developed in a 20th-century laboratory,Rectangular MDF Wood Planter. In this reaction,Square Mdf Wood Planter.Geometric Wood Planter.

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

History

In 1926,Nuclear Spiral Wound Gasket-based E.I. du Pont de Nemours and Co.Kynol 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,Carbonized Fiber Packing with Graphite. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Carbonized Fiber Packing,graphite 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.teflon ring gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Corrugated Graphite Tapes.

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,Braided Graphite Tube. In this process, ethylene is the polymer, the chemical building block of polyester,PTFE Joint Sealant.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Joint Sealant Flange Gasket. The four basic forms are filament,Expanded PTFE Products, tow, and fiberfill. In the filament form,eptfe, producing smooth-ptfe joint sealant tape.Graphite Packing With PTFE Impregnated, filaments are cut to short,Corrugated Graphite Tapes.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.Kynol Fiber 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-Standard Spiral Wound Gasket,Special Materials Spiral Wound Gaskets, is extruded through a slot to form long ribbons.

Drying

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

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 Sheet

PTFE Sheets, 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 Packing. The rope-Expanded PTFE Gasket.

Drawing tow

• 1 Newly-Pipe Thread Sealing Cord.PTFE Gaskets.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Graphite Gasket Reinforced With Metal Mesh.Graphite Gasket Reinforced With Metal Foil.

Cutting

• 4 Following heat setting,Pure Expanded Graphite Gasket. 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)Pure Expanded Graphite Gasket.Sintered Neodymium Iron Boron NdFeB Magnets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Industrial Magnets.

The Future

Oil Filter Magnets,Magnetic Filtration's fastest-growing fiber.Magnetic DC Electric Motors. 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,Magnetic Separation, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Magnetic Hook Set. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Sintered Neodymium Magnetic Hook Assembly, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.