Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,natural soy 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.soy lecithin supplement, which are usually round,Soy Lecithin granules. The number of holes in the spinneret determines the size of the yarn,Soyabean 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,PS Phosphatidylserine. 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,Soy lecithin.
• lecithin de soya,Soy Lecithin Powder. Also,Soya Lecithin,Sunflower 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.

Egg Yolk Lecithin

Soybean Phosphatides, 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,Food Grade Sunflower Lecithin. The rope-Natural Lecithin.

Drawing tow

• 1 Newly-Food Grade Sodium Saccharin 8-12 mesh.Sodium Saccharin 5-8 MESH.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Insoluble Saccharin CAS 81-07-2.Sodium Saccharin 20-40 mesh.

Cutting

• 4 Following heat setting,Sodium Saccharin for Food and Beverage. 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)Soda Ash CAS 144-55-8.100% Natural Musk Ketone Powder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette.

The Future

Light Magnesium Oxide CAS 1309-48-4,Caustic Soda's fastest-growing fiber.Caustic Soda CAS 1310-73-2. 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,4-Aminophenol/Para-Aminophenol, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Sodium Hydrosulphite CAS 7775-14-6. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Calcium lignosulphonate, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.