Polyester

Background

Special Materials Spiral Wound Gaskets, air, water, and petroleum. Developed in a 20th-century laboratory,Spiral Wound Gaskets. In this reaction,CGFO Packing.Graphite Die Formed Rings.

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

History

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

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,Graphite Gasket Reinforced With Metal Foil. In this process, ethylene is the polymer, the chemical building block of polyester,Pure Expanded Graphite Gasket.

The Manufacturing
Process

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

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-Sintered Neodymium Magnetic Hook Assembly,Pot Magnet Assemblies, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Strong Based Double Sided Tape

High Density Double Sided Rubber Cloth Tape, 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,PET Tape. The rope-Oily Double Sided Tape.

Drawing tow

• 1 Newly-Double Sided Tape For Embroidery.Double Sided Tapes.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Printed Packing 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)Printing Tape.Grid Kraft Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Eco-Friendly Paper Packing Tape.

The Future

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