Polyester

Background

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

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

History

In 1926,Lactose powder CAS 63-42-3-based E.I. du Pont de Nemours and Co.Potassium Sorbate CAS 24634-61-5. This early research, headed by W.H. Carothers,Sodium Benzoate CAS 532-32-1, 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,Ethyl Vanillin CAS 121-32-4. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Grooving Machine for Spiral Wound Gasket Outer Ring,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.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,Spiral Wound Gasket Ring Making machine.

The Manufacturing
Process

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

Drying

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

Winding

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

Copper Metal Spinning Spare Parts

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

Drawing tow

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

Crimping

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

Setting

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

Cutting

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

The Future

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