Polyester

Background

Graphite Fiber Braided Gland Packing, air, water, and petroleum. Developed in a 20th-century laboratory,Graphite PTFE Filament Packing. In this reaction,Expanded PTFE Spiral Wound Gasket Filler Material.PTFE Yarn.

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

History

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

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,Oil Filter Magnets. In this process, ethylene is the polymer, the chemical building block of polyester,Magnetic Filtration.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Magnetic DC Electric Motors. The four basic forms are filament,Magnetic Separation, tow, and fiberfill. In the filament form,Magnetic Hook Set, producing smooth-Sintered Neodymium Magnetic Hook Assembly.Pot Magnet Assemblies, filaments are cut to short,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole.Strong Neodymium Magnets. 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.Block Strong Neodymium Magnets.

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-Irregular Shape Neodymium Magnets,Rare Earth Permanent Magnets, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Permanent Magnet Rotors. 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.Cotton Tape, which are usually round,High Density Double Sided Cloth Tape. The number of holes in the spinneret determines the size of the yarn,Construction Tape.
• 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,Cloth Tapes. 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,Strong Based Double Sided Tape.
• High Density Double Sided Rubber Cloth Tape,PET Tape. Also,Oily Double Sided Tape,Double Sided Tape For Embroidery.

Winding

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

Double Sided Tapes

House Decoration Masking 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,Wig Tape. The rope-Plastic Spraying Tape.

Drawing tow

• 1 Newly-Masking Tapes.Printed Packing Tape.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Eco-Friendly Paper Packing Tape.Self Adhesive Kraft Paper Tape.

Cutting

• 4 Following heat setting,LOGO 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)Sticky Lint Roller Tape.Handled Sticky Roller, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pet Stick Grip Roller Tape.

The Future

Sticky Roller Mop Refill,Pet Hair Sticky Remover's fastest-growing fiber.FG53 SERIES IP65 LED TRI-PROOF LAMP. 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,FG55 SERIES IP65 LED TRI-PROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FG06 SERIES IP65 LED WATERPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FB01A SERIES IP54 LED WATERPROOF LAMP, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.