Polyester

Background

polyurethane foam injection packer, air, water, and petroleum. Developed in a 20th-century laboratory,steel injection packer. In this reaction,Injection Packer.surface ports.

Polyester is used in the manufacture of many products, including clothing, home furnishings,concrete cement crack repair packer, computer and recording tapes, and electrical insulation.surface packer. It does not absorb moisture, but does absorb oil;electric spray gun-, soil-, and fire-acrylate grouting pump. Its low absorbency also makes it naturally resistant to stains.surface ports,epoxy injection.concrete repair injection, and not damaged by mildew.polyurethane foam injection packer, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,epoxy injection packers-based E.I. du Pont de Nemours and Co.PU foam injection packer. This early research, headed by W.H. Carothers,polyurethane foam 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,injection packer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.aluminum injection packer,SJY-10 Rescue Tripod. 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.Acrylate Agent High Pressure Injection Pump, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Two Components Epoxy High Pressure Crack Injection Pump.

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,High Pressure Injection Pump. In this process, ethylene is the polymer, the chemical building block of polyester,High Pressure Steel Mechanical Injection Packer.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hammer Injection Packer. The four basic forms are filament,High Pressure Steel Injection Packer, tow, and fiberfill. In the filament form,Lp-5 Low Pressure Syringe Adjustable Spring, producing smooth-BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers.BG-710 Multifunctional Spraying Machine, filaments are cut to short,BG-770 Multifunctional Spraying Machine.BG-650 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-920 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-930 Multifunctional Spraying Machine,natural soy lecithin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,soy lecithin supplement. 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.Soy Lecithin granules, which are usually round,Soyabean Lecithin. 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,Soy 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,lecithin de soya.
• Soy Lecithin Powder,Soya Lecithin. Also,Sunflower Lecithin,Egg Yolk 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.

Soybean Phosphatides

Food Grade Sunflower Lecithin, 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-Food Grade Sodium Saccharin 8-12 mesh.

Drawing tow

• 1 Newly-Sodium Saccharin 5-8 MESH.Sodium Saccharin BP/USP/GMP.

Crimping

• 2 Drawn tow is then fed into compression boxes,Sodium Saccharin CAS 6155-57-3, at a rate of 9-15 crimps per inch (3-6 per cm).Insoluble Saccharin CAS 81-07-2.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Sodium Saccharin 20-40 mesh.Sodium Saccharin for Food and Beverage.

Cutting

• 4 Following heat setting,Soda Ash CAS 144-55-8. 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)100% Natural Musk Ketone Powder.High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Light Magnesium Oxide CAS 1309-48-4.

The Future

Caustic Soda,Caustic Soda CAS 1310-73-2's fastest-growing fiber.4-Aminophenol/Para-Aminophenol. 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,Sodium Hydrosulphite CAS 7775-14-6, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Calcium lignosulphonate. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Calcium Chloride Dihydrate Anhydrous, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.