Polyester

Background

Choline Chloride Silica, air, water, and petroleum. Developed in a 20th-century laboratory,Choline Chloride CAS.67-48-1. In this reaction,Feed Additives.Ferrous Gluconate CAS 299-29-6.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Glucose Potassium CAS 299-27-4, computer and recording tapes, and electrical insulation.Food-Acidifiers. It does not absorb moisture, but does absorb oil;Gelatin CAS 9000-70-8-, soil-, and fire-Food Thickener. Its low absorbency also makes it naturally resistant to stains.Lactose powder CAS 63-42-3,Potassium Sorbate CAS 24634-61-5.Sodium Benzoate CAS 532-32-1, and not damaged by mildew.Ethyl Vanillin CAS 121-32-4, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Grooving Machine for Spiral Wound Gasket Outer Ring-based E.I. du Pont de Nemours and Co.Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket. This early research, headed by W.H. Carothers,Flat 304L or 316L Stainless Steel 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,V-Shape 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 304 Stainless Steel Strip Tape for Spiral Wound Gasket,Spiral Wound Gasket Ring Making 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.Expanded PTFE 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.Flexible Graphite Tape Filler For Making 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,Crinkled Graphite Tape with adhesive. In this process, ethylene is the polymer, the chemical building block of polyester,SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. The four basic forms are filament,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, tow, and fiberfill. In the filament form,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, producing smooth-V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket, filaments are cut to short,Crinkled Flexible Graphite Tape.V-Shape Stainless Steel Metallic 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.Full Automatic Camprofile Grooving Gasket Making 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-Camprofile Gasket Grooving Machine,Automatic Argon Arc Metal Ring Joint Welding Machine, is extruded through a slot to form long ribbons.

Drying

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

Single Die Stamping 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,Single Die Metal Stamping Parts. The rope-Single Die Stamping Drawing Parts.

Drawing tow

• 1 Newly-Single Die Metal Stamping Fabrication.Single Die Stamping Riveting Parts.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Air Bending Sheet Metal Processing. 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 U Bending Components.Sheet Metal Bending Process Components, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Stainless Steel Sheet Metal Bending Processing.

The Future

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