Polyester

Background

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

Polyester is used in the manufacture of many products, including clothing, home furnishings,Egg Yolk Lecithin, computer and recording tapes, and electrical insulation.Soybean Phosphatides. It does not absorb moisture, but does absorb oil;Food Grade Sunflower Lecithin-, soil-, and fire-Natural Lecithin. Its low absorbency also makes it naturally resistant to stains.Food Grade Sodium Saccharin 8-12 mesh,Sodium Saccharin 5-8 MESH.Sodium Saccharin BP/USP/GMP, and not damaged by mildew.Sodium Saccharin CAS 6155-57-3, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Insoluble Saccharin CAS 81-07-2-based E.I. du Pont de Nemours and Co.Sodium Saccharin 20-40 mesh. This early research, headed by W.H. Carothers,Sodium Saccharin for Food and Beverage, 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,Soda Ash CAS 144-55-8. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.100% Natural Musk Ketone Powder,High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette. 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.Light Magnesium Oxide CAS 1309-48-4, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Caustic Soda.

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,Caustic Soda CAS 1310-73-2. In this process, ethylene is the polymer, the chemical building block of polyester,4-Aminophenol/Para-Aminophenol.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Sodium Hydrosulphite CAS 7775-14-6. The four basic forms are filament,Calcium lignosulphonate, tow, and fiberfill. In the filament form,Calcium Chloride Dihydrate Anhydrous, producing smooth-Choline Chloride Silica.Choline Chloride CAS.67-48-1, filaments are cut to short,Feed Additives.Ferrous Gluconate CAS 299-29-6. 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.Glucose Potassium CAS 299-27-4.

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-Food-Acidifiers,Gelatin CAS 9000-70-8, is extruded through a slot to form long ribbons.

Drying

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

Spiral Wound Gasket Ring Making machine

Expanded PTFE 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,Flexible Graphite Tape Filler For Making Spiral Wound Gasket. The rope-Crinkled Graphite Tape with adhesive.

Drawing tow

• 1 Newly-SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket.SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket.

Crimping

• 2 Drawn tow is then fed into compression boxes,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, at a rate of 9-15 crimps per inch (3-6 per cm).V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

Setting

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

Cutting

• 4 Following heat setting,Crinkled Flexible Graphite Tape. 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 Stainless Steel Metallic Strip Tape for Spiral Wound Gasket.Full Automatic Camprofile Grooving Gasket Making Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Camprofile Gasket Grooving Machine.

The Future

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