Polyester

Background

pu injection packer, air, water, and petroleum. Developed in a 20th-century laboratory,polyurethane foam injection packer. In this reaction,aluminum injection packer.SJY-10 Rescue Tripod.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Rescue Tripod, computer and recording tapes, and electrical insulation.Acrylate Agent High Pressure Injection Pump. It does not absorb moisture, but does absorb oil;Polyurethane High Pressure Crack Injection Pump-, soil-, and fire-High Pressure Injection Pump. Its low absorbency also makes it naturally resistant to stains.High Pressure Steel Mechanical Injection Packer,Hammer Injection Packer.Aluminum Injection Packers, and not damaged by mildew.150MM High Pressure Steel Mechanical Injection Packer. New Nitrile Rubber, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Waterproof Injection Packer-based E.I. du Pont de Nemours and Co.Lp-5 Low Pressure Syringe Adjustable Spring. This early research, headed by W.H. Carothers,LP-3 Rubber low pressure syringe, 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.Low Pressure Epoxy Syringe Injectior,BG-710 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-780 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-830 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-860 Multifunctional Spraying Machine. In this process, ethylene is the polymer, the chemical building block of polyester,BG-870 Multifunctional Spraying Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BG-930 Multifunctional Spraying Machine. The four basic forms are filament,Multifunctional Cement Mortar Spraying Machine, tow, and fiberfill. In the filament form,Cement Mortar Spray Machine, producing smooth-Food Additives.PS Phosphatidylserine, filaments are cut to short,Phosphatidylserine.super soya 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.Soy Lecithin granules.

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-Soyabean Lecithin,Soy Lecithin Powder, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Soya 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.Food Additives, which are usually round,Natural Phospholipids. The number of holes in the spinneret determines the size of the yarn,Natural 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,Modified 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,Sunflower Lecithin.
• Food Grade Sunflower Lecithin,Natural Lecithin. Also,Sodium Saccharin BP/USP/GMP,Sodium Saccharin CAS 6155-57-3.

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 40-80 MESH

Anhydrous Sodium Saccharin CAS 128-44-9, 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,Feed Grade Sodium Saccharin. The rope-Insoluble Saccharin CAS 81-07-2.

Drawing tow

• 1 Newly-Sodium Saccharin for Food and Beverage.Soda ash.

Crimping

• 2 Drawn tow is then fed into compression boxes,Musk Xylene With Crystal Powder, at a rate of 9-15 crimps per inch (3-6 per cm).100% Natural Musk Ketone Powder.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Musk ketone CAS 81-14-1.Light Magnesium Oxide CAS 1309-48-4.

Cutting

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

The Future

Calcium lignosulphonate CAS 8061-52-7,Choline Chloride Corn Cob's fastest-growing fiber.Calcium Gluconate CAS 299-28-5. 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,Sodium Alginate CAS 9005-38-3. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Xanthan Gum CAS 11138-66-2, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.