Polyester

Background

electric spray gun, air, water, and petroleum. Developed in a 20th-century laboratory,acrylate grouting pump. In this reaction,surface ports.epoxy injection.

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

History

In 1926,Acrylate Agent High Pressure Injection Pump-based E.I. du Pont de Nemours and Co.Two Components Epoxy High Pressure Crack Injection Pump. This early research, headed by W.H. Carothers,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,High Pressure Steel Mechanical Injection Packer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hammer Injection Packer,High Pressure Steel 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.Lp-5 Low Pressure Syringe Adjustable Spring, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.BG-LP-1 and BG-LP-2 Plastic Surface 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,BG-710 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,BG-770 Multifunctional Spraying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BG-650 Multifunctional Spraying Machine. The four basic forms are filament,BG-920 Multifunctional Spraying Machine, tow, and fiberfill. In the filament form,BG-930 Multifunctional Spraying Machine, producing smooth-natural soy lecithin.soy lecithin supplement, filaments are cut to short,Soy Lecithin granules.Soyabean 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.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-Soy lecithin,lecithin de soya, is extruded through a slot to form long ribbons.

Drying

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

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 CAS 6155-57-3

Insoluble Saccharin CAS 81-07-2, 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 20-40 mesh. The rope-Sodium Saccharin for Food and Beverage.

Drawing tow

• 1 Newly-Soda Ash CAS 144-55-8.100% Natural Musk Ketone Powder.

Crimping

• 2 Drawn tow is then fed into compression boxes,High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette, at a rate of 9-15 crimps per inch (3-6 per cm).Light Magnesium Oxide CAS 1309-48-4.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Caustic Soda.Caustic Soda CAS 1310-73-2.

Cutting

• 4 Following heat setting,4-Aminophenol/Para-Aminophenol. 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)Sodium Hydrosulphite CAS 7775-14-6.Calcium lignosulphonate, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Calcium Chloride Dihydrate Anhydrous.

The Future

Choline Chloride Silica,Choline Chloride CAS.67-48-1's fastest-growing fiber.Feed Additives. 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,Ferrous Gluconate CAS 299-29-6, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Glucose Potassium CAS 299-27-4. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Food-Acidifiers, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.