Polyester

Background

Tanged Metal Reinforced Graphite Gasket, air, water, and petroleum. Developed in a 20th-century laboratory,Graphite Gasket Reinforced With Metal Mesh. In this reaction,Graphite Gasket Reinforced With Metal Foil.Pure Expanded Graphite Gasket.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Pure Expanded Graphite Gasket, computer and recording tapes, and electrical insulation.Sintered Neodymium Iron Boron NdFeB Magnets. It does not absorb moisture, but does absorb oil;Industrial Magnets-, soil-, and fire-Oil Filter Magnets. Its low absorbency also makes it naturally resistant to stains.Magnetic Filtration,Magnetic DC Electric Motors.Magnetic Separation, and not damaged by mildew.Magnetic Hook Set, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Sintered Neodymium Magnetic Hook Assembly-based E.I. du Pont de Nemours and Co.Pot Magnet Assemblies. This early research, headed by W.H. Carothers,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole, 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,Strong Neodymium Magnets. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Block Strong Neodymium Magnets,Irregular Shape Neodymium 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.Rare Earth Permanent Magnets, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Permanent Magnet Rotors.

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,Cotton Tape. In this process, ethylene is the polymer, the chemical building block of polyester,High Density Double Sided Cloth Tape.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Construction Tape. The four basic forms are filament,Cloth Tapes, tow, and fiberfill. In the filament form,Strong Based Double Sided Tape, producing smooth-High Density Double Sided Rubber Cloth Tape.PET Tape, filaments are cut to short,Oily Double Sided Tape.Double Sided Tape For Embroidery. 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.Double Sided 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-House Decoration Masking Tape,Wig Tape, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Plastic Spraying 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.Masking Tapes, which are usually round,Printed Packing Tape. The number of holes in the spinneret determines the size of the yarn,Printing 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,Grid Kraft 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,Eco-Friendly Paper Packing Tape.
• Self Adhesive Kraft Paper Tape,LOGO Tape. Also,Sticky Lint Roller Tape,Handled Sticky Roller.

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 Stick Grip Roller Tape

Sticky Roller Mop Refill, 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 Hair Sticky Remover. The rope-FG53 SERIES IP65 LED TRI-PROOF LAMP.

Drawing tow

• 1 Newly-FG55 SERIES IP65 LED TRI-PROOF LAMP.FG06 SERIES IP65 LED WATERPROOF LAMP.

Crimping

• 2 Drawn tow is then fed into compression boxes,FB01A SERIES IP54 LED WATERPROOF LAMP, at a rate of 9-15 crimps per inch (3-6 per cm).FG11 SERIES IP65 LED WATERPROOF LAMP.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)FB02 SERIES IP20 LED WATERPROOF LAMP.FE05 SERIES IP65 LED WATERPROOF LAMP.

Cutting

• 4 Following heat setting,FLD-A SERIES IP65 LED FLOOD LIGHT. 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)Flood Light.FE03 SERIES IP65 LED DUSTPROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FE05 SERIES IP65 LED DUSTPROOF LAMP.

The Future

FI81E SERIES IP65 LED DUSTPROOF LAMP,FI88E SERIES IP65 LED DUSTPROOF LAMP's fastest-growing fiber.FI89E SERIES IP65 LED DUSTPROOF 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,FG03 SEREIS IP67 LED DUSTPROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FG04 SERIES IP65 LED DUSTPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FG06 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.