Polyester

Background

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

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

History

In 1926,150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber-based E.I. du Pont de Nemours and Co.Waterproof 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,LP-3 Rubber low pressure syringe. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.BG-LP-1 and BG-LP-2 Plastic Surface Injection Packers,Low Pressure Epoxy Syringe Injectior. 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-780 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-830 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,BG-860 Multifunctional Spraying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BG-870 Multifunctional Spraying Machine. The four basic forms are filament,BG-930 Multifunctional Spraying Machine, tow, and fiberfill. In the filament form,Multifunctional Cement Mortar Spraying Machine, producing smooth-Cement Mortar Spray Machine.Food Additives, filaments are cut to short,PS Phosphatidylserine.Phosphatidylserine. 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.super 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-Soy Lecithin granules,Soyabean Lecithin, 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,Food Additives. The number of holes in the spinneret determines the size of the yarn,Natural Phospholipids.
• 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,Modified Lecithin.
• Sunflower Lecithin,Food Grade Sunflower Lecithin. Also,Natural Lecithin,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

Sodium Saccharin 40-80 MESH, 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,Anhydrous Sodium Saccharin CAS 128-44-9. The rope-Feed Grade Sodium Saccharin.

Drawing tow

• 1 Newly-Insoluble Saccharin CAS 81-07-2.Sodium Saccharin for Food and Beverage.

Crimping

• 2 Drawn tow is then fed into compression boxes,Soda ash, at a rate of 9-15 crimps per inch (3-6 per cm).Musk Xylene With Crystal Powder.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)100% Natural Musk Ketone Powder.Musk ketone CAS 81-14-1.

Cutting

• 4 Following heat setting,Light Magnesium Oxide CAS 1309-48-4. 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)Caustic Soda.Caustic Soda CAS 1310-73-2, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Sodium Hydrosulphite.

The Future

Calcium lignosulphonate,Calcium lignosulphonate CAS 8061-52-7's fastest-growing fiber.Choline Chloride Corn Cob. 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 Gluconate CAS 299-28-5, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Ferrous Gluconate CAS 299-29-6. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Sodium Alginate CAS 9005-38-3, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.