Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

Drying

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

Printing Tape

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

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Sticky Roller Mop Refill.Pet Hair Sticky Remover.

Cutting

• 4 Following heat setting,FG53 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)FG55 SERIES IP65 LED TRI-PROOF LAMP.FG06 SERIES IP65 LED WATERPROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FB01A SERIES IP54 LED WATERPROOF LAMP.

The Future

FG11 SERIES IP65 LED WATERPROOF LAMP,FB02 SERIES IP20 LED WATERPROOF LAMP's fastest-growing fiber.FE05 SERIES IP65 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,FLD-A SERIES IP65 LED FLOOD LIGHT, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Flood Light. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FE03 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.