Polyester

Background

Caustic Soda, air, water, and petroleum. Developed in a 20th-century laboratory,Caustic Soda CAS 1310-73-2. In this reaction,4-Aminophenol/Para-Aminophenol.Sodium Hydrosulphite CAS 7775-14-6.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Calcium lignosulphonate, computer and recording tapes, and electrical insulation.Calcium Chloride Dihydrate Anhydrous. It does not absorb moisture, but does absorb oil;Choline Chloride Silica-, soil-, and fire-Choline Chloride CAS.67-48-1. Its low absorbency also makes it naturally resistant to stains.Feed Additives,Ferrous Gluconate CAS 299-29-6.Glucose Potassium CAS 299-27-4, and not damaged by mildew.Food-Acidifiers, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Gelatin CAS 9000-70-8-based E.I. du Pont de Nemours and Co.Food Thickener. This early research, headed by W.H. Carothers,Lactose powder CAS 63-42-3, 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,Potassium Sorbate CAS 24634-61-5. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Sodium Benzoate CAS 532-32-1,Ethyl Vanillin CAS 121-32-4. 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.Grooving Machine for Spiral Wound Gasket Outer Ring, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

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,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket. The four basic forms are filament,Spiral Wound Gasket Ring Making machine, tow, and fiberfill. In the filament form,Expanded PTFE Tape For Spiral Wound Gasket, producing smooth-Flexible Graphite Tape Filler For Making Spiral Wound Gasket.Crinkled Graphite Tape with adhesive, filaments are cut to short,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. 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.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.

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-V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket,V-Shape 304 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,V-Shape 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.Crinkled Flexible Graphite Tape, which are usually round,V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket. The number of holes in the spinneret determines the size of the yarn,Full Automatic Camprofile Grooving Gasket 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,Camprofile Gasket Grooving Machine. 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,Automatic Argon Arc Metal Ring Joint Welding Machine.
• Polishing Machine For Spiral Wound Gasket Metal Ring,Spiral Wound Gasket Outer Ring Grooving Machine. Also,Full Automatic Spiral Wound Gasket Winding Machine,Automatic Winding Machine For Making 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.

Small Size Winding Machine for Spiral Wound Gasket

Deep Drawing Tooling, 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,Copper Metal Spinning Spare Parts. The rope-Progressive Die Stamping Process Parts.

Drawing tow

• 1 Newly-Progressive Die Stamping Riveting Parts.Progressive Die Stamping Spare Parts.

Crimping

• 2 Drawn tow is then fed into compression boxes,Progressive Die Stamping, at a rate of 9-15 crimps per inch (3-6 per cm).Single Die Stamping Spare Parts.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Single Die Metal Stamping Parts.Single Die Stamping Drawing Parts.

Cutting

• 4 Following heat setting,Single Die Metal Stamping Fabrication. 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)Single Die Stamping Riveting Parts.Alloy Steel Sheet Metal Laser Cutting Spare Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Carbon Steel Sheet Metal Laser Cutting Components.

The Future

Sheet Metal Laser Cutting,Bending Corrugated Sheet Metal Parts's fastest-growing fiber.Air Bending Sheet Metal Processing. 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,Sheet Metal U Bending Components, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Sheet Metal Bending Process Components. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Stainless Steel Sheet Metal Bending Processing, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.