Polyester

Background

surface ports, air, water, and petroleum. Developed in a 20th-century laboratory,epoxy injection. In this reaction,epoxy crack injection.EPOXY INJECTION FOR CONCRETE CRACK REPAIR.

Polyester is used in the manufacture of many products, including clothing, home furnishings,PU foam injection packer, computer and recording tapes, and electrical insulation.injection packer. It does not absorb moisture, but does absorb oil;epoxy injection packers-, soil-, and fire-polyurethane foam injection packer. Its low absorbency also makes it naturally resistant to stains.Steel Mechanical Injection Packer,pu injection packer.polyurethane foam injection packer, and not damaged by mildew.aluminum injection packer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,SJY-10 Rescue Tripod-based E.I. du Pont de Nemours and Co.Rescue Tripod. This early research, headed by W.H. Carothers,Acrylate Agent High Pressure Injection Pump, 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,Polyurethane High Pressure Crack Injection Pump. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.High Pressure Injection Pump,High Pressure Steel Mechanical Injection Packer. 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.Hammer Injection Packer, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum Injection Packers.

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,150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber. In this process, ethylene is the polymer, the chemical building block of polyester,Waterproof Injection Packer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lp-5 Low Pressure Syringe Adjustable Spring. The four basic forms are filament,LP-3 Rubber low pressure syringe, tow, and fiberfill. In the filament form,BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers, producing smooth-Low Pressure Epoxy Syringe Injectior.BG-710 Multifunctional Spraying Machine, filaments are cut to short,BG-780 Multifunctional Spraying Machine.BG-830 Multifunctional Spraying Machine. 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.BG-860 Multifunctional Spraying Machine.

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-BG-870 Multifunctional Spraying Machine,BG-930 Multifunctional Spraying Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Multifunctional Cement Mortar Spraying Machine. 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.Cement Mortar Spray Machine, which are usually round,Food Additives. The number of holes in the spinneret determines the size of the yarn,PS Phosphatidylserine.
• 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,Phosphatidylserine. 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,super soya lecithin.
• Soy Lecithin granules,Soyabean Lecithin. Also,Soy Lecithin Powder,Soya Lecithin.

Winding

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

Food Additives

Natural Phospholipids, 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,Natural Lecithin. The rope-Modified Lecithin.

Drawing tow

• 1 Newly-Sunflower Lecithin.Food Grade Sunflower Lecithin.

Crimping

• 2 Drawn tow is then fed into compression boxes,Natural Lecithin, at a rate of 9-15 crimps per inch (3-6 per cm).Sodium Saccharin BP/USP/GMP.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Sodium Saccharin CAS 6155-57-3.Sodium Saccharin 40-80 MESH.

Cutting

• 4 Following heat setting,Anhydrous Sodium Saccharin CAS 128-44-9. 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)Feed Grade Sodium Saccharin.Insoluble Saccharin CAS 81-07-2, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Sodium Saccharin for Food and Beverage.

The Future

Soda ash,Musk Xylene With Crystal Powder's fastest-growing fiber.100% Natural Musk Ketone Powder. 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,Musk ketone CAS 81-14-1, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Light Magnesium Oxide CAS 1309-48-4. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Caustic Soda, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.