Polyester

Background

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

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

History

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

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

The Manufacturing
Process

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

Drying

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

Masking Tapes

Printed 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,Printing Tape. The rope-Grid Kraft Tape.

Drawing tow

• 1 Newly-Eco-Friendly Paper Packing Tape.Self Adhesive Kraft Paper Tape.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Sticky Roller Mop Refill. 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)Pet Hair Sticky Remover.FG53 SERIES IP65 LED TRI-PROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FG55 SERIES IP65 LED TRI-PROOF LAMP.

The Future

FG06 SERIES IP65 LED WATERPROOF LAMP,FB01A SERIES IP54 LED WATERPROOF LAMP's fastest-growing fiber.FG11 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,FB02 SERIES IP20 LED WATERPROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FE05 SERIES IP65 LED WATERPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.FLD-A SERIES IP65 LED FLOOD LIGHT, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.