Polyester

Background

Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, air, water, and petroleum. Developed in a 20th-century laboratory,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket. In this reaction,V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket.Spiral Wound Gasket Ring Making machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Expanded PTFE Tape For Spiral Wound Gasket, computer and recording tapes, and electrical insulation.Flexible Graphite Tape Filler For Making Spiral Wound Gasket. It does not absorb moisture, but does absorb oil;Crinkled Graphite Tape with adhesive-, soil-, and fire-SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. Its low absorbency also makes it naturally resistant to stains.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.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,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket-based E.I. du Pont de Nemours and Co.Crinkled Flexible Graphite Tape. This early research, headed by W.H. Carothers,V-Shape Stainless Steel Metallic Strip Tape for 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,Full Automatic Camprofile Grooving Gasket Making Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Camprofile Gasket Grooving Machine,Automatic Argon Arc Metal Ring Joint Welding Machine. 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.Polishing Machine For Spiral Wound Gasket Metal Ring, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Spiral Wound Gasket Outer Ring Grooving Machine.

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,Full Automatic Spiral Wound Gasket Winding Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Automatic Winding Machine For Making Spiral Wound Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Small Size Winding Machine for Spiral Wound Gasket. The four basic forms are filament,Deep Drawing Tooling, tow, and fiberfill. In the filament form,Copper Metal Spinning Spare Parts, producing smooth-Progressive Die Stamping Process Parts.Progressive Die Stamping Riveting Parts, filaments are cut to short,Progressive Die Stamping Spare Parts.Progressive Die Stamping. 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.Single Die Stamping Spare Parts.

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-Single Die Metal Stamping Parts,Single Die Stamping Drawing Parts, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Aluminum Bending Sheet Metal Parts

Sheet Metal Iron Bending Panel, 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,Industrial Sheet Metal Bending Brackets. The rope-Sheet Metal Bending Spare Parts.

Drawing tow

• 1 Newly-Sheet Metal Argon Arc Welding Parts.Arc Welding Sheet Metal Processing.

Crimping

• 2 Drawn tow is then fed into compression boxes,Mild Steel Sheet Metal Welding Parts, at a rate of 9-15 crimps per inch (3-6 per cm).Alloy Steel Sheet Metal Welding Processing.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Iron Welding Sheet Metal Parts.Cold Rolled Steel Sheet Metal Fabrication.

Cutting

• 4 Following heat setting,Sheet Metal Welding Machine Shell. 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)Sheet Metal Welding.Sheet Metal, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Indoor LTE.

The Future

Indoor CPE,Dual band LTE's fastest-growing fiber.4G wifi router. 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,4G outdoor CPE, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,4G outdoor CPE. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.4G CPE, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.