Polyester

Background

soy lecithin supplement, air, water, and petroleum. Developed in a 20th-century laboratory,Soy Lecithin granules. In this reaction,Soyabean Lecithin.PS Phosphatidylserine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Soy lecithin, computer and recording tapes, and electrical insulation.lecithin de soya. It does not absorb moisture, but does absorb oil;Soy Lecithin Powder-, soil-, and fire-Soya Lecithin. Its low absorbency also makes it naturally resistant to stains.Sunflower Lecithin,Egg Yolk Lecithin.Soybean Phosphatides, and not damaged by mildew.Food Grade Sunflower Lecithin, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Natural Lecithin-based E.I. du Pont de Nemours and Co.Food Grade Sodium Saccharin 8-12 mesh. This early research, headed by W.H. Carothers,Sodium Saccharin 5-8 MESH, 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,Sodium Saccharin BP/USP/GMP. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sodium Saccharin CAS 6155-57-3,Insoluble Saccharin CAS 81-07-2. 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.Sodium Saccharin 20-40 mesh, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Sodium Saccharin for Food and Beverage.

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,Soda Ash CAS 144-55-8. In this process, ethylene is the polymer, the chemical building block of polyester,100% Natural Musk Ketone Powder.

The Manufacturing
Process

Polyester is manufactured by one of several methods.High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette. The four basic forms are filament,Light Magnesium Oxide CAS 1309-48-4, tow, and fiberfill. In the filament form,Caustic Soda, producing smooth-Caustic Soda CAS 1310-73-2.4-Aminophenol/Para-Aminophenol, filaments are cut to short,Sodium Hydrosulphite CAS 7775-14-6.Calcium lignosulphonate. 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.Calcium Chloride Dihydrate Anhydrous.

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-Choline Chloride Silica,Choline Chloride CAS.67-48-1, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Feed Additives. 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.Ferrous Gluconate CAS 299-29-6, which are usually round,Glucose Potassium CAS 299-27-4. The number of holes in the spinneret determines the size of the yarn,Food-Acidifiers.
• 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,Gelatin CAS 9000-70-8. 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 Thickener.
• Lactose powder CAS 63-42-3,Potassium Sorbate CAS 24634-61-5. Also,Sodium Benzoate CAS 532-32-1,Ethyl Vanillin CAS 121-32-4.

Winding

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

Grooving Machine for Spiral Wound Gasket Outer Ring

Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, 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,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. The rope-V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

Drawing tow

• 1 Newly-V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket.Spiral Wound Gasket Ring Making machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Expanded PTFE Tape For Spiral Wound Gasket, at a rate of 9-15 crimps per inch (3-6 per cm).Flexible Graphite Tape Filler For Making Spiral Wound Gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Crinkled Graphite Tape with adhesive.SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket.

Cutting

• 4 Following heat setting,SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. 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)Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket.

The Future

V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket,Crinkled Flexible Graphite Tape's fastest-growing fiber.V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket. 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,Full Automatic Camprofile Grooving Gasket Making Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Camprofile Gasket Grooving Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Automatic Argon Arc Metal Ring Joint Welding Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.