Polyester

Background

surface ports, air, water, and petroleum. Developed in a 20th-century laboratory,epoxy injection. In this reaction,concrete repair injection.polyurethane foam injection packer.

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

History

In 1926,High Pressure Injection Pump-based E.I. du Pont de Nemours and Co.High Pressure Steel Mechanical Injection Packer. This early research, headed by W.H. Carothers,Hammer Injection Packer, 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,High Pressure Steel 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,BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers. 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-710 Multifunctional Spraying Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.BG-770 Multifunctional Spraying Machine.

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-650 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,BG-920 Multifunctional Spraying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BG-930 Multifunctional Spraying Machine. The four basic forms are filament,natural soy lecithin, tow, and fiberfill. In the filament form,soy lecithin supplement, producing smooth-Soy Lecithin granules.Soyabean Lecithin, filaments are cut to short,PS Phosphatidylserine.Soy lecithin. 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.lecithin de soya.

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-Soy Lecithin Powder,Soya Lecithin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Sunflower Lecithin. 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.Egg Yolk Lecithin, which are usually round,Soybean Phosphatides. The number of holes in the spinneret determines the size of the yarn,Food Grade Sunflower 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,Natural Lecithin. 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,Food Grade Sodium Saccharin 8-12 mesh.
• Sodium Saccharin 5-8 MESH,Sodium Saccharin BP/USP/GMP. Also,Sodium Saccharin CAS 6155-57-3,Insoluble Saccharin CAS 81-07-2.

Winding

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

Sodium Saccharin 20-40 mesh

Sodium Saccharin for Food and Beverage, 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,Soda Ash CAS 144-55-8. The rope-100% Natural Musk Ketone Powder.

Drawing tow

• 1 Newly-High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette.Light Magnesium Oxide CAS 1309-48-4.

Crimping

• 2 Drawn tow is then fed into compression boxes,Caustic Soda, at a rate of 9-15 crimps per inch (3-6 per cm).Caustic Soda CAS 1310-73-2.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)4-Aminophenol/Para-Aminophenol.Sodium Hydrosulphite CAS 7775-14-6.

Cutting

• 4 Following heat setting,Calcium lignosulphonate. 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)Calcium Chloride Dihydrate Anhydrous.Choline Chloride Silica, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Choline Chloride CAS.67-48-1.

The Future

Feed Additives,Ferrous Gluconate CAS 299-29-6's fastest-growing fiber.Glucose Potassium CAS 299-27-4. 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,Food-Acidifiers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Gelatin CAS 9000-70-8. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Food Thickener, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.