Polyester

Background

concrete repair injection, air, water, and petroleum. Developed in a 20th-century laboratory,polyurethane foam injection packer. In this reaction,epoxy injection packers.PU foam 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.injection packer. It does not absorb moisture, but does absorb oil;aluminum injection packer-, soil-, and fire-SJY-10 Rescue Tripod. Its low absorbency also makes it naturally resistant to stains.Acrylate Agent High Pressure Injection Pump,Two Components Epoxy 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.High Pressure Steel Injection Packer. This early research, headed by W.H. Carothers,Lp-5 Low Pressure Syringe Adjustable Spring, 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,BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.BG-710 Multifunctional Spraying Machine,BG-770 Multifunctional Spraying Machine. 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-650 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-920 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-930 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,natural soy lecithin.

The Manufacturing
Process

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

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-Sunflower Lecithin,Egg Yolk Lecithin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Soybean Phosphatides. 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.Food Grade Sunflower Lecithin, which are usually round,Natural Lecithin. The number of holes in the spinneret determines the size of the yarn,Food Grade Sodium Saccharin 8-12 mesh.
• 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,Sodium Saccharin 5-8 MESH. 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,Sodium Saccharin BP/USP/GMP.
• Sodium Saccharin CAS 6155-57-3,Insoluble Saccharin CAS 81-07-2. Also,Sodium Saccharin 20-40 mesh,Sodium Saccharin for Food and Beverage.

Winding

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

Soda Ash CAS 144-55-8

100% Natural Musk Ketone Powder, 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,High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette. The rope-Light Magnesium Oxide CAS 1309-48-4.

Drawing tow

• 1 Newly-Caustic Soda.Caustic Soda CAS 1310-73-2.

Crimping

• 2 Drawn tow is then fed into compression boxes,4-Aminophenol/Para-Aminophenol, at a rate of 9-15 crimps per inch (3-6 per cm).Sodium Hydrosulphite CAS 7775-14-6.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Calcium lignosulphonate.Calcium Chloride Dihydrate Anhydrous.

Cutting

• 4 Following heat setting,Choline Chloride Silica. 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)Choline Chloride CAS.67-48-1.Feed Additives, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Ferrous Gluconate CAS 299-29-6.

The Future

Glucose Potassium CAS 299-27-4,Food-Acidifiers's fastest-growing fiber.Gelatin CAS 9000-70-8. 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 Thickener, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Lactose powder CAS 63-42-3. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Potassium Sorbate CAS 24634-61-5, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.