Polyester

Background

Metal Planter Tray With Handles, air, water, and petroleum. Developed in a 20th-century laboratory,Antique Metal Planter Pot with Stands Décor. In this reaction,Metal Planter.Rectangular MDF Wood Planter.

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

History

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

The Manufacturing
Process

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

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

Drying

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

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 Porous Membrane

PTFE Membranes, 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,Expanded PTFE Sheet. The rope-PTFE Sheets.

Drawing tow

• 1 Newly-PTFE Packing.Expanded PTFE Gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Pipe Thread Sealing Cord, at a rate of 9-15 crimps per inch (3-6 per cm).PTFE Gaskets.

Setting

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

Cutting

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

The Future

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