Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

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-Wig Tape,Plastic Spraying Tape, is extruded through a slot to form long ribbons.

Drying

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

Sticky Roller Mop Refill

Pet Hair Sticky Remover, 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,FG53 SERIES IP65 LED TRI-PROOF LAMP. The rope-FG55 SERIES IP65 LED TRI-PROOF LAMP.

Drawing tow

• 1 Newly-FG06 SERIES IP65 LED WATERPROOF LAMP.FB01A SERIES IP54 LED WATERPROOF LAMP.

Crimping

• 2 Drawn tow is then fed into compression boxes,FG11 SERIES IP65 LED WATERPROOF LAMP, at a rate of 9-15 crimps per inch (3-6 per cm).FB02 SERIES IP20 LED WATERPROOF LAMP.

Setting

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

Cutting

• 4 Following heat setting,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)FE03 SERIES IP65 LED DUSTPROOF LAMP.FE05 SERIES IP65 LED DUSTPROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FI81E SERIES IP65 LED DUSTPROOF LAMP.

The Future

FI88E SERIES IP65 LED DUSTPROOF LAMP,FI89E SERIES IP65 LED DUSTPROOF LAMP's fastest-growing fiber.FG03 SEREIS IP67 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,FG04 SERIES IP65 LED DUSTPROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FG06 SERIES IP65 LED DUSTPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FB01A SERIES IP54 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.