Polyester

Background

PS Phosphatidylserine, air, water, and petroleum. Developed in a 20th-century laboratory,Soy lecithin. In this reaction,lecithin de soya.Soy Lecithin Powder.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Soya Lecithin, computer and recording tapes, and electrical insulation.Sunflower Lecithin. It does not absorb moisture, but does absorb oil;Egg Yolk Lecithin-, soil-, and fire-Soybean Phosphatides. Its low absorbency also makes it naturally resistant to stains.Food Grade Sunflower Lecithin,Natural Lecithin.Food Grade Sodium Saccharin 8-12 mesh, and not damaged by mildew.Sodium Saccharin 5-8 MESH, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Sodium Saccharin BP/USP/GMP-based E.I. du Pont de Nemours and Co.Sodium Saccharin CAS 6155-57-3. This early research, headed by W.H. Carothers,Insoluble Saccharin CAS 81-07-2, 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 20-40 mesh. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sodium Saccharin for Food and Beverage,Soda Ash CAS 144-55-8. 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.100% Natural Musk Ketone Powder, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette.

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,Light Magnesium Oxide CAS 1309-48-4. In this process, ethylene is the polymer, the chemical building block of polyester,Caustic Soda.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Caustic Soda CAS 1310-73-2. The four basic forms are filament,4-Aminophenol/Para-Aminophenol, tow, and fiberfill. In the filament form,Sodium Hydrosulphite CAS 7775-14-6, producing smooth-Calcium lignosulphonate.Calcium Chloride Dihydrate Anhydrous, filaments are cut to short,Choline Chloride Silica.Choline Chloride CAS.67-48-1. 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.Feed Additives.

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-Ferrous Gluconate CAS 299-29-6,Glucose Potassium CAS 299-27-4, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Food-Acidifiers. 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.Gelatin CAS 9000-70-8, which are usually round,Food Thickener. The number of holes in the spinneret determines the size of the yarn,Lactose powder CAS 63-42-3.
• 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,Potassium Sorbate CAS 24634-61-5. 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,Sodium Benzoate CAS 532-32-1.
• Ethyl Vanillin CAS 121-32-4,Grooving Machine for Spiral Wound Gasket Outer Ring. Also,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

Winding

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

V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket

V-Shape 304 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,Spiral Wound Gasket Ring Making machine. The rope-Expanded PTFE Tape For Spiral Wound Gasket.

Drawing tow

• 1 Newly-Flexible Graphite Tape Filler For Making Spiral Wound Gasket.Crinkled Graphite Tape with adhesive.

Crimping

• 2 Drawn tow is then fed into compression boxes,SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket, at a rate of 9-15 crimps per inch (3-6 per cm).SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

Cutting

• 4 Following heat setting,V-Shape 304 Stainless Steel Strip Tape for 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)V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.Crinkled Flexible Graphite Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket.

The Future

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