Polyester

Background

Food-Acidifiers, air, water, and petroleum. Developed in a 20th-century laboratory,Gelatin CAS 9000-70-8. In this reaction,Food Thickener.Lactose powder CAS 63-42-3.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Potassium Sorbate CAS 24634-61-5, computer and recording tapes, and electrical insulation.Sodium Benzoate CAS 532-32-1. It does not absorb moisture, but does absorb oil;Ethyl Vanillin CAS 121-32-4-, soil-, and fire-Grooving Machine for Spiral Wound Gasket Outer Ring. Its low absorbency also makes it naturally resistant to stains.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, and not damaged by mildew.V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Spiral Wound Gasket Ring Making machine-based E.I. du Pont de Nemours and Co.Expanded PTFE Tape For Spiral Wound Gasket. This early research, headed by W.H. Carothers,Flexible Graphite Tape Filler For Making 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,Crinkled Graphite Tape with adhesive. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.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. 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.Flat 304L or 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.V-Shape 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,V-Shape 304 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.Crinkled Flexible Graphite Tape. The four basic forms are filament,V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket, tow, and fiberfill. In the filament form,Full Automatic Camprofile Grooving Gasket Making Machine, producing smooth-Camprofile Gasket Grooving Machine.Automatic Argon Arc Metal Ring Joint Welding Machine, filaments are cut to short,Polishing Machine For Spiral Wound Gasket Metal Ring.Spiral Wound Gasket Outer Ring Grooving Machine. 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.Full Automatic Spiral Wound Gasket Winding Machine.

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-Automatic Winding Machine For Making Spiral Wound Gasket,Small Size Winding Machine for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Deep Drawing Tooling. 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.Copper Metal Spinning Spare Parts, which are usually round,Progressive Die Stamping Process Parts. The number of holes in the spinneret determines the size of the yarn,Progressive Die Stamping Riveting 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,Progressive Die Stamping Spare 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,Progressive Die Stamping.
• Single Die Stamping Spare Parts,Single Die Metal Stamping Parts. Also,Single Die Stamping Drawing Parts,Single Die Metal Stamping Fabrication.

Winding

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

Single Die Stamping Riveting Parts

Alloy Steel Sheet Metal Laser Cutting Spare 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,Carbon Steel Sheet Metal Laser Cutting Components. The rope-Sheet Metal Laser Cutting.

Drawing tow

• 1 Newly-Bending Corrugated Sheet Metal Parts.Air Bending Sheet Metal Processing.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Stainless Steel Sheet Metal Bending Processing.Aluminum Bending Sheet Metal Parts.

Cutting

• 4 Following heat setting,Sheet Metal Iron Bending Panel. 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)Industrial Sheet Metal Bending Brackets.Sheet Metal Bending Spare Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Sheet Metal Argon Arc Welding Parts.

The Future

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