Polyester

Background

Expanded PTFE Products, air, water, and petroleum. Developed in a 20th-century laboratory,eptfe. In this reaction,ptfe joint sealant tape.Graphite Packing With PTFE Impregnated.

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

History

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

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 Sheets. In this process, ethylene is the polymer, the chemical building block of polyester,PTFE Packing.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Industrial Magnets. 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.Oil Filter Magnets, which are usually round,Magnetic Filtration. The number of holes in the spinneret determines the size of the yarn,Magnetic DC Electric Motors.
• 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,Magnetic Separation. 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,Magnetic Hook Set.
• Sintered Neodymium Magnetic Hook Assembly,Pot Magnet Assemblies. Also,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole,Strong Neodymium Magnets.

Winding

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

Block Strong Neodymium Magnets

Irregular Shape Neodymium Magnets, 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 Permanent Magnets. The rope-Permanent Magnet Rotors.

Drawing tow

• 1 Newly-Cotton Tape.High Density Double Sided Cloth Tape.

Crimping

• 2 Drawn tow is then fed into compression boxes,Construction Tape, at a rate of 9-15 crimps per inch (3-6 per cm).Cloth Tapes.

Setting

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

Cutting

• 4 Following heat setting,PET 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)Oily Double Sided Tape.Double Sided Tape For Embroidery, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Double Sided Tapes.

The Future

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