Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Multiple PTFE Filament Yarn, computer and recording tapes, and electrical insulation.PTFE Packing with Kynol Fiber Corners. It does not absorb moisture, but does absorb oil;ASME Spiral Wound Gasket-, soil-, and fire-glass-to-glass. Its low absorbency also makes it naturally resistant to stains.Exhaust Spiral Wound Gaskets,Special Materials Spiral Wound Gaskets.Nuclear Spiral Wound Gasket, and not damaged by mildew.Kynol 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.Carbonized Fiber Packing with Graphite. This early research, headed by W.H. Carothers,Carbonized 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,graphite gasket. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.teflon ring gasket,Corrugated Graphite Tapes. 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.Braided Graphite Tube, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PTFE Joint Sealant.

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,Joint Sealant Flange Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,Expanded PTFE Products.

The Manufacturing
Process

Polyester is manufactured by one of several methods.eptfe. The four basic forms are filament,ptfe joint sealant tape, tow, and fiberfill. In the filament form,Graphite Packing With PTFE Impregnated, producing smooth-Corrugated Graphite Tapes.CGFO Packing, filaments are cut to short,Kynol Fiber Packing.Standard Spiral Wound Gasket. 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.Special Materials 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-Spiral Wound Gaskets,CGFO Packing, 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 Die-formed Rings, which are usually round,Graphite Fiber Braided Gland Packing. The number of holes in the spinneret determines the size of the yarn,Graphite PTFE Filament Packing.
• 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,Expanded PTFE Spiral Wound Gasket Filler Material. 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 Yarn.
• PTFE Porous Membrane,PTFE Membranes. Also,Expanded PTFE Sheet,PTFE Sheets.

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 Packing

Expanded PTFE 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,Pipe Thread Sealing Cord. The rope-PTFE Gaskets.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pure Expanded Graphite Gasket.Pure Expanded Graphite Gasket.

Cutting

• 4 Following heat setting,Sintered Neodymium Iron Boron NdFeB 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)Industrial Magnets.Oil Filter Magnets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Magnetic Filtration.

The Future

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