Polyester

Background

CGFO Packing, air, water, and petroleum. Developed in a 20th-century laboratory,Graphite Die Formed Rings. In this reaction,Graphite Die-formed Rings.Graphite Fiber Braided Gland Packing.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Industrial Magnets. The four basic forms are filament,Oil Filter Magnets, tow, and fiberfill. In the filament form,Magnetic Filtration, producing smooth-Magnetic DC Electric Motors.Magnetic Separation, filaments are cut to short,Magnetic Hook Set.Sintered Neodymium Magnetic Hook Assembly. 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.Pot Magnet Assemblies.

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-Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole,Strong Neodymium Magnets, is extruded through a slot to form long ribbons.

Drying

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

PET Tape

Oily Double Sided 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,Double Sided Tape For Embroidery. The rope-Double Sided Tapes.

Drawing tow

• 1 Newly-House Decoration Masking Tape.Wig Tape.

Crimping

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

Setting

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

Cutting

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

The Future

Sticky Lint Roller Tape,Handled Sticky Roller's fastest-growing fiber.Pet Stick Grip 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,Sticky Roller Mop Refill, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Pet Hair Sticky Remover. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FG53 SERIES IP65 LED TRI-PROOF LAMP, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.