Polyester

Background

PTFE Sheets, air, water, and petroleum. Developed in a 20th-century laboratory,PTFE Packing. In this reaction,Expanded PTFE Gasket.Pipe Thread Sealing Cord.

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

History

In 1926,Industrial Magnets-based E.I. du Pont de Nemours and Co.Oil Filter Magnets. This early research, headed by W.H. Carothers,Magnetic Filtration, 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,Magnetic DC Electric Motors. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Magnetic Separation,Magnetic Hook Set. 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 Magnetic Hook Assembly, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Pot Magnet Assemblies.

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,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole. In this process, ethylene is the polymer, the chemical building block of polyester,Strong Neodymium Magnets.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Block Strong Neodymium Magnets. The four basic forms are filament,Irregular Shape Neodymium Magnets, tow, and fiberfill. In the filament form,Rare Earth Permanent Magnets, producing smooth-Permanent Magnet Rotors.Cotton Tape, filaments are cut to short,High Density Double Sided Cloth Tape.Construction Tape. 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.Cloth Tapes.

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

Drying

• 3 After the polyester emerges from polymerization,PET 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.Oily Double Sided Tape, which are usually round,Double Sided Tape For Embroidery. The number of holes in the spinneret determines the size of the yarn,Double Sided Tapes.
• 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,House Decoration Masking 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,Wig Tape.
• Plastic Spraying Tape,Masking Tapes. Also,Printed Packing Tape,Printing 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.

Grid Kraft Tape

Eco-Friendly Paper Packing 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,Self Adhesive Kraft Paper Tape. The rope-LOGO Tape.

Drawing tow

• 1 Newly-Sticky Lint Roller Tape.Handled Sticky Roller.

Crimping

• 2 Drawn tow is then fed into compression boxes,Pet Stick Grip Roller Tape, at a rate of 9-15 crimps per inch (3-6 per cm).Sticky Roller Mop Refill.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Pet Hair Sticky Remover.FG53 SERIES IP65 LED TRI-PROOF LAMP.

Cutting

• 4 Following heat setting,FG55 SERIES IP65 LED TRI-PROOF LAMP. 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)FG06 SERIES IP65 LED WATERPROOF LAMP.FB01A SERIES IP54 LED WATERPROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FG11 SERIES IP65 LED WATERPROOF LAMP.

The Future

FB02 SERIES IP20 LED WATERPROOF LAMP,FE05 SERIES IP65 LED WATERPROOF LAMP's fastest-growing fiber.FLD-A SERIES IP65 LED FLOOD LIGHT. 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,Flood Light, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FE03 SERIES IP65 LED DUSTPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FE05 SERIES IP65 LED DUSTPROOF LAMP, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.