Polyester

Background

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

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

History

In 1926,Graphite PTFE Yarn-based E.I. du Pont de Nemours and Co.Multiple PTFE Filament Yarn. This early research, headed by W.H. Carothers,PTFE Packing with Kynol Fiber Corners, 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,ASME Spiral Wound Gasket. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.glass-to-glass,Exhaust Spiral Wound Gaskets. 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.Special Materials Spiral Wound Gaskets, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Nuclear Spiral Wound 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,Kynol 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.Carbonized Fiber Packing with Graphite. The four basic forms are filament,Carbonized Fiber Packing, tow, and fiberfill. In the filament form,graphite gasket, producing smooth-teflon ring gasket.Corrugated Graphite Tapes, filaments are cut to short,Braided Graphite Tube.PTFE Joint Sealant. 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.Joint Sealant Flange Gasket.

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-Expanded PTFE Products,eptfe, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ptfe joint sealant tape. 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 Packing With PTFE Impregnated, which are usually round,Corrugated Graphite Tapes. 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,Kynol Fiber 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,Standard Spiral Wound Gasket.
• Special Materials Spiral Wound Gaskets,Spiral Wound Gaskets. Also,CGFO Packing,Graphite Die Formed Rings.

Winding

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

Graphite Die-formed Rings

Graphite Fiber Braided Gland Packing, 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 PTFE Filament Packing. The rope-Expanded PTFE Spiral Wound Gasket Filler Material.

Drawing tow

• 1 Newly-PTFE Yarn.PTFE Porous Membrane.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Expanded PTFE 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)Pipe Thread Sealing Cord.PTFE Gaskets, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tanged Metal Reinforced Graphite Gasket.

The Future

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