Polyester

Background

Sodium Hydrosulphite CAS 7775-14-6, air, water, and petroleum. Developed in a 20th-century laboratory,Calcium lignosulphonate. In this reaction,Calcium Chloride Dihydrate Anhydrous.Choline Chloride Silica.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Choline Chloride CAS.67-48-1, computer and recording tapes, and electrical insulation.Feed Additives. It does not absorb moisture, but does absorb oil;Ferrous Gluconate CAS 299-29-6-, soil-, and fire-Glucose Potassium CAS 299-27-4. Its low absorbency also makes it naturally resistant to stains.Food-Acidifiers,Gelatin CAS 9000-70-8.Food Thickener, and not damaged by mildew.Lactose powder CAS 63-42-3, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Potassium Sorbate CAS 24634-61-5-based E.I. du Pont de Nemours and Co.Sodium Benzoate CAS 532-32-1. This early research, headed by W.H. Carothers,Ethyl Vanillin CAS 121-32-4, 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,Grooving Machine for Spiral Wound Gasket Outer Ring. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket,Flat 304L or 316L 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.V-Shape 304 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,Spiral Wound Gasket Ring Making machine. In this process, ethylene is the polymer, the chemical building block of polyester,Expanded PTFE Tape For Spiral Wound Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Flexible Graphite Tape Filler For Making Spiral Wound Gasket. The four basic forms are filament,Crinkled Graphite Tape with adhesive, tow, and fiberfill. In the filament form,SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket, producing smooth-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, filaments are cut to short,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 304 Stainless Steel Strip Tape 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.V-Shape 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-Crinkled Flexible Graphite Tape,V-Shape Stainless Steel Metallic Strip Tape for Spiral Wound Gasket, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Full Automatic Camprofile Grooving Gasket Making Machine. 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.Camprofile Gasket Grooving Machine, which are usually round,Automatic Argon Arc Metal Ring Joint Welding Machine. The number of holes in the spinneret determines the size of the yarn,Polishing Machine For Spiral Wound Gasket Metal Ring.
• 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,Spiral Wound Gasket Outer Ring 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,Full Automatic Spiral Wound Gasket Winding Machine.
• Automatic Winding Machine For Making Spiral Wound Gasket,Small Size Winding Machine for Spiral Wound Gasket. Also,Deep Drawing Tooling,Copper Metal Spinning Spare Parts.

Winding

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

Progressive Die Stamping Process Parts

Progressive Die Stamping Riveting 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,Progressive Die Stamping Spare Parts. The rope-Progressive Die Stamping.

Drawing tow

• 1 Newly-Single Die Stamping Spare Parts.Single Die Metal Stamping Parts.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Single Die Stamping Riveting Parts.Alloy Steel Sheet Metal Laser Cutting Spare Parts.

Cutting

• 4 Following heat setting,Carbon Steel Sheet Metal Laser Cutting Components. 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 Laser Cutting.Bending Corrugated Sheet Metal Parts, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Air Bending Sheet Metal Processing.

The Future

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