Polyester

Background

Calcium Chloride Dihydrate Anhydrous, air, water, and petroleum. Developed in a 20th-century laboratory,Choline Chloride Silica. In this reaction,Choline Chloride CAS.67-48-1.Feed Additives.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Ferrous Gluconate CAS 299-29-6, computer and recording tapes, and electrical insulation.Glucose Potassium CAS 299-27-4. It does not absorb moisture, but does absorb oil;Food-Acidifiers-, soil-, and fire-Gelatin CAS 9000-70-8. Its low absorbency also makes it naturally resistant to stains.Food Thickener,Lactose powder CAS 63-42-3.Potassium Sorbate CAS 24634-61-5, and not damaged by mildew.Sodium Benzoate CAS 532-32-1, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Ethyl Vanillin CAS 121-32-4-based E.I. du Pont de Nemours and Co.Grooving Machine for Spiral Wound Gasket Outer Ring. 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,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.Spiral Wound Gasket Ring Making machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Expanded PTFE 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,Flexible Graphite Tape Filler For Making Spiral Wound Gasket. In this process, ethylene is the polymer, the chemical building block of polyester,Crinkled Graphite Tape with adhesive.

The Manufacturing
Process

Polyester is manufactured by one of several methods.SS304 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket. The four basic forms are filament,SS316 Stainless Steel Metal Strip Tape for Inner and Out Ring of Spiral wound gasket, tow, and fiberfill. In the filament form,Flat 304L or 316L Stainless Steel Strip Tape for Spiral Wound Gasket, producing smooth-V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.V-Shape 304 Stainless Steel Strip Tape for Spiral Wound Gasket, filaments are cut to short,V-Shape 316L Stainless Steel Strip Tape for Spiral Wound Gasket.Crinkled Flexible Graphite Tape. 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 Stainless Steel Metallic 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-Full Automatic Camprofile Grooving Gasket Making Machine,Camprofile Gasket Grooving Machine, is extruded through a slot to form long ribbons.

Drying

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

Progressive Die Stamping, 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 Stamping Spare Parts. The rope-Single Die Metal Stamping Parts.

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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