Polyester

Background

Cabinet with 6 Drawers, air, water, and petroleum. Developed in a 20th-century laboratory,Furniture. In this reaction,Metal Planter Tray With Handles.Antique Metal Planter Pot with Stands Décor.

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

History

In 1926,ASME Spiral Wound Gasket-based E.I. du Pont de Nemours and Co.glass-to-glass. This early research, headed by W.H. Carothers,Exhaust Spiral Wound Gaskets, 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,Special Materials Spiral Wound Gaskets. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Nuclear Spiral Wound Gasket,Kynol Fiber Packing. 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.graphite gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Carbonized Fiber Packing with Graphite.

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,Carbonized Fiber Packing. In this process, ethylene is the polymer, the chemical building block of polyester,graphite gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.teflon ring gasket. The four basic forms are filament,Corrugated Graphite Tapes, tow, and fiberfill. In the filament form,Braided Graphite Tube, producing smooth-PTFE Joint Sealant.Joint Sealant Flange Gasket, filaments are cut to short,Expanded PTFE Products.eptfe. 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.ptfe joint sealant tape.

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 Packing With PTFE Impregnated,Corrugated Graphite Tapes, is extruded through a slot to form long ribbons.

Drying

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

PTFE Yarn, 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 Porous Membrane. The rope-PTFE Membranes.

Drawing tow

• 1 Newly-Expanded PTFE Sheet.PTFE Sheets.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pipe Thread Sealing Cord.PTFE Gaskets.

Cutting

• 4 Following heat setting,Tanged Metal Reinforced 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)Tanged Metal Reinforced Graphite Gasket.Graphite Gasket Reinforced With Metal Mesh, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Graphite Gasket Reinforced With Metal Foil.

The Future

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