Polyester

Background

Kynol Fiber Packing, air, water, and petroleum. Developed in a 20th-century laboratory,Standard Spiral Wound Gasket. In this reaction,Special Materials Spiral Wound Gaskets.Spiral Wound Gaskets.

Polyester is used in the manufacture of many products, including clothing, home furnishings,CGFO Packing, computer and recording tapes, and electrical insulation.Graphite Die Formed Rings. It does not absorb moisture, but does absorb oil;Graphite Die-formed Rings-, soil-, and fire-Graphite Fiber Braided Gland Packing. Its low absorbency also makes it naturally resistant to stains.Graphite PTFE Filament Packing,Expanded PTFE Spiral Wound Gasket Filler Material.PTFE Yarn, and not damaged by mildew.PTFE Porous Membrane, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PTFE Membranes-based E.I. du Pont de Nemours and Co.Expanded PTFE Sheet. This early research, headed by W.H. Carothers,PTFE Sheets, 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,PTFE Packing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Expanded PTFE Gasket,Pipe Thread Sealing Cord. 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 Gaskets, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Tanged Metal Reinforced 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,Tanged Metal Reinforced Graphite Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,Graphite Gasket Reinforced With Metal Mesh.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Graphite Gasket Reinforced With Metal Foil. The four basic forms are filament,Pure Expanded Graphite Gasket, tow, and fiberfill. In the filament form,Pure Expanded Graphite Gasket, producing smooth-Sintered Neodymium Iron Boron NdFeB Magnets.Industrial Magnets, filaments are cut to short,Oil Filter Magnets.Magnetic Filtration. 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.Magnetic DC Electric Motors.

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-Magnetic Separation,Magnetic Hook Set, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Sintered Neodymium Magnetic Hook Assembly. 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.Pot Magnet Assemblies, which are usually round,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole. The number of holes in the spinneret determines the size of the yarn,Strong Neodymium 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,Block Strong Neodymium 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,Irregular Shape Neodymium Magnets.
• Rare Earth Permanent Magnets,Permanent Magnet Rotors. Also,Cotton Tape,High Density Double Sided Cloth Tape.

Winding

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

Construction Tape

Cloth Tapes, 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,Strong Based Double Sided Tape. The rope-High Density Double Sided Rubber Cloth Tape.

Drawing tow

• 1 Newly-PET Tape.Oily Double Sided Tape.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)House Decoration Masking Tape.Wig Tape.

Cutting

• 4 Following heat setting,Plastic Spraying 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)Masking Tapes.Printed Packing Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Printing Tape.

The Future

Grid Kraft Tape,Eco-Friendly Paper Packing Tape's fastest-growing fiber.Self Adhesive Kraft Paper 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,LOGO Tape, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Sticky Lint Roller Tape. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Handled Sticky Roller, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.