Polyester

Background

Pure Expanded Graphite Gasket, air, water, and petroleum. Developed in a 20th-century laboratory,Sintered Neodymium Iron Boron NdFeB Magnets. In this reaction,Industrial Magnets.Oil Filter Magnets.

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

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.PET Tape. The four basic forms are filament,Oily Double Sided Tape, tow, and fiberfill. In the filament form,Double Sided Tape For Embroidery, producing smooth-Double Sided Tapes.House Decoration Masking Tape, filaments are cut to short,Wig Tape.Plastic Spraying 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.Masking 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-Printed Packing Tape,Printing Tape, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Grid Kraft 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.Eco-Friendly Paper Packing Tape, which are usually round,Self Adhesive Kraft Paper Tape. The number of holes in the spinneret determines the size of the yarn,LOGO 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,Sticky Lint Roller 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,Handled Sticky Roller.
• Pet Stick Grip Roller Tape,Sticky Roller Mop Refill. Also,Pet Hair Sticky Remover,FG53 SERIES IP65 LED TRI-PROOF LAMP.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

FG55 SERIES IP65 LED TRI-PROOF LAMP

FG06 SERIES IP65 LED WATERPROOF LAMP, 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,FB01A SERIES IP54 LED WATERPROOF LAMP. The rope-FG11 SERIES IP65 LED WATERPROOF LAMP.

Drawing tow

• 1 Newly-FB02 SERIES IP20 LED WATERPROOF LAMP.FE05 SERIES IP65 LED WATERPROOF LAMP.

Crimping

• 2 Drawn tow is then fed into compression boxes,FLD-A SERIES IP65 LED FLOOD LIGHT, at a rate of 9-15 crimps per inch (3-6 per cm).Flood Light.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)FE03 SERIES IP65 LED DUSTPROOF LAMP.FE05 SERIES IP65 LED DUSTPROOF LAMP.

Cutting

• 4 Following heat setting,FI81E SERIES IP65 LED DUSTPROOF 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)FI88E SERIES IP65 LED DUSTPROOF LAMP.FI89E SERIES IP65 LED DUSTPROOF LAMP, such ascarpet,polyester filaments are cut into 6 inch (15 cm)FG03 SEREIS IP67 LED DUSTPROOF LAMP.

The Future

FG04 SERIES IP65 LED DUSTPROOF LAMP,FG06 SERIES IP65 LED DUSTPROOF LAMP's fastest-growing fiber.FB01A SERIES IP54 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,FG11 SERIES IP65 LED DUSTPROOF LAMP, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,FB02 SERIES IP20 LED DUSTPROOF LAMP. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Dustproof Light, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.