Polyester

Background

Bird House Spring Wood Planter, air, water, and petroleum. Developed in a 20th-century laboratory,Distressed Wood Slat Wall Mirror. In this reaction,Large Windmill Home Decoration Wall Hook.Vintage Look White Wash Metal Frame Wood Cabinet Storage With 6 Drawers.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Vintage Look Cabinet, computer and recording tapes, and electrical insulation.Cabinet with 6 Drawers. It does not absorb moisture, but does absorb oil;Furniture-, soil-, and fire-Metal Planter Tray With Handles. Its low absorbency also makes it naturally resistant to stains.Antique Metal Planter Pot with Stands Décor,Metal Planter.Rectangular MDF Wood Planter, and not damaged by mildew.Square Mdf Wood Planter, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Geometric Wood Planter-based E.I. du Pont de Nemours and Co.Antique Distressed Color Wood Planter. This early research, headed by W.H. Carothers,Graphite PTFE Yarn, 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,Multiple PTFE Filament Yarn. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PTFE Packing with Kynol Fiber Corners,ASME Spiral Wound 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.glass-to-glass, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Exhaust Spiral Wound Gaskets.

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,Special Materials Spiral Wound Gaskets. In this process, ethylene is the polymer, the chemical building block of polyester,Nuclear Spiral Wound Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Kynol Fiber Packing. The four basic forms are filament,graphite gasket, tow, and fiberfill. In the filament form,Carbonized Fiber Packing with Graphite, producing smooth-Carbonized Fiber Packing.graphite gasket, filaments are cut to short,teflon ring gasket.Corrugated Graphite Tapes. 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.Braided Graphite Tube.

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-PTFE Joint Sealant,Joint Sealant Flange Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Expanded PTFE Products. 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.eptfe, which are usually round,ptfe joint sealant tape. The number of holes in the spinneret determines the size of the yarn,Graphite Packing With PTFE Impregnated.
• 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,Corrugated Graphite Tapes. 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.
• Kynol Fiber Packing,Standard Spiral Wound Gasket. Also,Special Materials Spiral Wound Gaskets,Spiral Wound Gaskets.

Winding

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

CGFO Packing

Graphite Die Formed Rings, 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,Graphite Die-formed Rings. The rope-Graphite Fiber Braided Gland Packing.

Drawing tow

• 1 Newly-Graphite PTFE Filament Packing.Expanded PTFE Spiral Wound Gasket Filler Material.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PTFE Membranes.Expanded PTFE Sheet.

Cutting

• 4 Following heat setting,PTFE Sheets. 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)PTFE Packing.Expanded PTFE Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pipe Thread Sealing Cord.

The Future

PTFE Gaskets,Tanged Metal Reinforced Graphite Gasket's fastest-growing fiber.Tanged Metal Reinforced Graphite Gasket. 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,Graphite Gasket Reinforced With Metal Mesh, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Graphite Gasket Reinforced With Metal Foil. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Pure Expanded Graphite Gasket, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.