Polyester

Background

Corrugated Graphite Tapes, air, water, and petroleum. Developed in a 20th-century laboratory,Braided Graphite Tube. In this reaction,PTFE Joint Sealant.Joint Sealant Flange Gasket.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Expanded PTFE Products, computer and recording tapes, and electrical insulation.eptfe. It does not absorb moisture, but does absorb oil;ptfe joint sealant tape-, soil-, and fire-Graphite Packing With PTFE Impregnated. Its low absorbency also makes it naturally resistant to stains.Corrugated Graphite Tapes,CGFO Packing.Kynol Fiber Packing, and not damaged by mildew.Standard Spiral Wound Gasket, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Special Materials Spiral Wound Gaskets-based E.I. du Pont de Nemours and Co.Spiral Wound Gaskets. This early research, headed by W.H. Carothers,CGFO 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 Die Formed Rings. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Graphite Die-formed Rings,Graphite Fiber Braided Gland 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 PTFE Filament Packing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Expanded PTFE Spiral Wound Gasket Filler Material.

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,PTFE Yarn. In this process, ethylene is the polymer, the chemical building block of polyester,PTFE Porous Membrane.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PTFE Membranes. The four basic forms are filament,Expanded PTFE Sheet, tow, and fiberfill. In the filament form,PTFE Sheets, producing smooth-PTFE Packing.Expanded PTFE Gasket, filaments are cut to short,Pipe Thread Sealing Cord.PTFE Gaskets. 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.Tanged Metal Reinforced Graphite 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-Tanged Metal Reinforced Graphite Gasket,Graphite Gasket Reinforced With Metal Mesh, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Graphite Gasket Reinforced With Metal Foil. 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.Pure Expanded Graphite Gasket, which are usually round,Pure Expanded Graphite Gasket. The number of holes in the spinneret determines the size of the yarn,Sintered Neodymium Iron Boron NdFeB Magnets.
• 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,Industrial Magnets. 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,Oil Filter Magnets.
• Magnetic Filtration,Magnetic DC Electric Motors. Also,Magnetic Separation,Magnetic Hook Set.

Winding

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

Sintered Neodymium Magnetic Hook Assembly

Pot Magnet Assemblies, 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,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole. The rope-Strong Neodymium Magnets.

Drawing tow

• 1 Newly-Block Strong Neodymium Magnets.Irregular Shape Neodymium Magnets.

Crimping

• 2 Drawn tow is then fed into compression boxes,Rare Earth Permanent Magnets, at a rate of 9-15 crimps per inch (3-6 per cm).Permanent Magnet Rotors.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cotton Tape.High Density Double Sided Cloth Tape.

Cutting

• 4 Following heat setting,Construction Tape. 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)Cloth Tapes.Strong Based Double Sided Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)High Density Double Sided Rubber Cloth Tape.

The Future

PET Tape,Oily Double Sided Tape's fastest-growing fiber.Double Sided Tape For Embroidery. 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,Double Sided Tapes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,House Decoration Masking Tape. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Wig Tape, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.