Polyester

Background

Lactose powder CAS 63-42-3, air, water, and petroleum. Developed in a 20th-century laboratory,Potassium Sorbate CAS 24634-61-5. In this reaction,Sodium Benzoate CAS 532-32-1.Ethyl Vanillin CAS 121-32-4.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Grooving Machine for Spiral Wound Gasket Outer Ring, computer and recording tapes, and electrical insulation.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. It does not absorb moisture, but does absorb oil;Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket-, soil-, and fire-V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket. Its low absorbency also makes it naturally resistant to stains.V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket,Spiral Wound Gasket Ring Making machine.Expanded PTFE Tape For Spiral Wound Gasket, and not damaged by mildew.Flexible Graphite Tape Filler For Making Spiral Wound Gasket, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Crinkled Graphite Tape with adhesive-based E.I. du Pont de Nemours and Co.SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. This early research, headed by W.H. Carothers,SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket, 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,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket,V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket. 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.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Crinkled Flexible Graphite Tape.

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,V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,Full Automatic Camprofile Grooving Gasket Making Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Camprofile Gasket Grooving Machine. The four basic forms are filament,Automatic Argon Arc Metal Ring Joint Welding Machine, tow, and fiberfill. In the filament form,Polishing Machine For Spiral Wound Gasket Metal Ring, producing smooth-Spiral Wound Gasket Outer Ring Grooving Machine.Full Automatic Spiral Wound Gasket Winding Machine, filaments are cut to short,Automatic Winding Machine For Making Spiral Wound Gasket.Small Size Winding Machine for 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.Deep Drawing Tooling.

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-Copper Metal Spinning Spare Parts,Progressive Die Stamping Process Parts, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Progressive Die Stamping Riveting Parts. 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.Progressive Die Stamping Spare Parts, which are usually round,Progressive Die Stamping. The number of holes in the spinneret determines the size of the yarn,Single Die Stamping Spare Parts.
• 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,Single Die Metal Stamping Parts. 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,Single Die Stamping Drawing Parts.
• Single Die Metal Stamping Fabrication,Single Die Stamping Riveting Parts. Also,Alloy Steel Sheet Metal Laser Cutting Spare Parts,Carbon Steel Sheet Metal Laser Cutting Components.

Winding

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

Sheet Metal Laser Cutting

Bending Corrugated Sheet Metal Parts, 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,Air Bending Sheet Metal Processing. The rope-Sheet Metal U Bending Components.

Drawing tow

• 1 Newly-Sheet Metal Bending Process Components.Stainless Steel Sheet Metal Bending Processing.

Crimping

• 2 Drawn tow is then fed into compression boxes,Aluminum Bending Sheet Metal Parts, at a rate of 9-15 crimps per inch (3-6 per cm).Sheet Metal Iron Bending Panel.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Industrial Sheet Metal Bending Brackets.Sheet Metal Bending Spare Parts.

Cutting

• 4 Following heat setting,Sheet Metal Argon Arc Welding Parts. 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)Arc Welding Sheet Metal Processing.Mild Steel Sheet Metal Welding Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Alloy Steel Sheet Metal Welding Processing.

The Future

Iron Welding Sheet Metal Parts,Cold Rolled Steel Sheet Metal Fabrication's fastest-growing fiber.Sheet Metal Welding Machine Shell. 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 Welding, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Sheet Metal. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Indoor LTE, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.