Polyester

Background

epoxy injection packers, air, water, and petroleum. Developed in a 20th-century laboratory,polyurethane foam injection packer. In this reaction,Steel Mechanical Injection Packer.pu injection packer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,polyurethane foam injection packer, computer and recording tapes, and electrical insulation.aluminum injection packer. It does not absorb moisture, but does absorb oil;SJY-10 Rescue Tripod-, soil-, and fire-Rescue Tripod. Its low absorbency also makes it naturally resistant to stains.Acrylate Agent High Pressure Injection Pump,Polyurethane High Pressure Crack Injection Pump.High Pressure Injection Pump, and not damaged by mildew.High Pressure Steel Mechanical Injection Packer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hammer Injection Packer-based E.I. du Pont de Nemours and Co.Aluminum Injection Packers. This early research, headed by W.H. Carothers,150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber, 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,Waterproof Injection Packer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Lp-5 Low Pressure Syringe Adjustable Spring,LP-3 Rubber low pressure syringe. 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.BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Low Pressure Epoxy Syringe Injectior.

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,BG-710 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,BG-780 Multifunctional Spraying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BG-830 Multifunctional Spraying Machine. The four basic forms are filament,BG-860 Multifunctional Spraying Machine, tow, and fiberfill. In the filament form,BG-870 Multifunctional Spraying Machine, producing smooth-BG-930 Multifunctional Spraying Machine.Multifunctional Cement Mortar Spraying Machine, filaments are cut to short,Cement Mortar Spray Machine.Food Additives. 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.PS Phosphatidylserine.

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-Phosphatidylserine,super soya lecithin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Soy Lecithin granules. 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.Soyabean Lecithin, which are usually round,Soy Lecithin Powder. The number of holes in the spinneret determines the size of the yarn,Soya Lecithin.
• 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,Food Additives. 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,Natural Phospholipids.
• Natural Lecithin,Modified Lecithin. Also,Sunflower Lecithin,Food Grade Sunflower 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.

Natural Lecithin

Sodium Saccharin BP/USP/GMP, 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,Sodium Saccharin CAS 6155-57-3. The rope-Sodium Saccharin 40-80 MESH.

Drawing tow

• 1 Newly-Anhydrous Sodium Saccharin CAS 128-44-9.Feed Grade Sodium Saccharin.

Crimping

• 2 Drawn tow is then fed into compression boxes,Insoluble Saccharin CAS 81-07-2, at a rate of 9-15 crimps per inch (3-6 per cm).Sodium Saccharin for Food and Beverage.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Soda ash.Musk Xylene With Crystal Powder.

Cutting

• 4 Following heat setting,100% Natural Musk Ketone Powder. 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)Musk ketone CAS 81-14-1.Light Magnesium Oxide CAS 1309-48-4, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Caustic Soda.

The Future

Caustic Soda CAS 1310-73-2,Sodium Hydrosulphite's fastest-growing fiber.Calcium lignosulphonate. 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,Calcium lignosulphonate CAS 8061-52-7, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Choline Chloride Corn Cob. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Calcium Gluconate CAS 299-28-5, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.