Polyester

Background

PTFE Yarn, air, water, and petroleum. Developed in a 20th-century laboratory,PTFE Porous Membrane. In this reaction,PTFE Membranes.Expanded PTFE Sheet.

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

History

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

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,Magnetic Separation. In this process, ethylene is the polymer, the chemical building block of polyester,Magnetic Hook Set.

The Manufacturing
Process

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

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-Cotton Tape,High Density Double Sided Cloth Tape, is extruded through a slot to form long ribbons.

Drying

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

Plastic Spraying Tape

Masking 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,Printed Packing Tape. The rope-Printing Tape.

Drawing tow

• 1 Newly-Grid Kraft Tape.Eco-Friendly Paper Packing Tape.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Sticky Lint Roller Tape.Handled Sticky Roller.

Cutting

• 4 Following heat setting,Pet Stick Grip Roller 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 Roller Mop Refill.Pet Hair Sticky Remover, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FG53 SERIES IP65 LED TRI-PROOF LAMP.

The Future

FG55 SERIES IP65 LED TRI-PROOF LAMP,FG06 SERIES IP65 LED WATERPROOF LAMP's fastest-growing fiber.FB01A SERIES IP54 LED WATERPROOF 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,FG11 SERIES IP65 LED WATERPROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FB02 SERIES IP20 LED WATERPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FE05 SERIES IP65 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.