Polyester

Background

Natural Lecithin, air, water, and petroleum. Developed in a 20th-century laboratory,Food Grade Sodium Saccharin 8-12 mesh. In this reaction,Sodium Saccharin 5-8 MESH.Sodium Saccharin BP/USP/GMP.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Sodium Saccharin CAS 6155-57-3, computer and recording tapes, and electrical insulation.Insoluble Saccharin CAS 81-07-2. It does not absorb moisture, but does absorb oil;Sodium Saccharin 20-40 mesh-, soil-, and fire-Sodium Saccharin for Food and Beverage. Its low absorbency also makes it naturally resistant to stains.Soda Ash CAS 144-55-8,100% Natural Musk Ketone Powder.High Purity Perfume/cosmetics/fragrance Fixative Musk Ambrette, and not damaged by mildew.Light Magnesium Oxide CAS 1309-48-4, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Caustic Soda-based E.I. du Pont de Nemours and Co.Caustic Soda CAS 1310-73-2. This early research, headed by W.H. Carothers,4-Aminophenol/Para-Aminophenol, 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 Hydrosulphite CAS 7775-14-6. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Calcium lignosulphonate,Calcium Chloride Dihydrate Anhydrous. 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.Choline Chloride Silica, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Choline Chloride CAS.67-48-1.

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,Feed Additives. In this process, ethylene is the polymer, the chemical building block of polyester,Ferrous Gluconate CAS 299-29-6.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Glucose Potassium CAS 299-27-4. The four basic forms are filament,Food-Acidifiers, tow, and fiberfill. In the filament form,Gelatin CAS 9000-70-8, producing smooth-Food Thickener.Lactose powder CAS 63-42-3, filaments are cut to short,Potassium Sorbate CAS 24634-61-5.Sodium Benzoate CAS 532-32-1. 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.Ethyl Vanillin CAS 121-32-4.

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-Grooving Machine for Spiral Wound Gasket Outer Ring,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. 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.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, which are usually round,V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket. The number of holes in the spinneret determines the size of the yarn,Spiral Wound Gasket Ring Making machine.
• 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,Expanded PTFE Tape For Spiral Wound Gasket. 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,Flexible Graphite Tape Filler For Making Spiral Wound Gasket.
• Crinkled Graphite Tape with adhesive,SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. Also,SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of 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,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket. The rope-Crinkled Flexible Graphite Tape.

Drawing tow

• 1 Newly-V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket.Full Automatic Camprofile Grooving Gasket Making Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Camprofile Gasket Grooving Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Automatic Argon Arc Metal Ring Joint Welding Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Polishing Machine For Spiral Wound Gasket Metal Ring.Spiral Wound Gasket Outer Ring Grooving Machine.

Cutting

• 4 Following heat setting,Full Automatic Spiral Wound Gasket Winding Machine. 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)Automatic Winding Machine For Making Spiral Wound Gasket.Small Size Winding Machine for Spiral Wound Gasket, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Deep Drawing Tooling.

The Future

Copper Metal Spinning Spare Parts,Progressive Die Stamping Process Parts's fastest-growing fiber.Progressive Die Stamping Riveting Parts. 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,Progressive Die Stamping Spare Parts, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Progressive Die Stamping. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Single Die Stamping Spare Parts, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.