Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,10 Inch MTK8163 CPU Android WIFI Tablet PC, computer and recording tapes, and electrical insulation.8 Inch RK3368 CPU Android WIFI Tablet PC. It does not absorb moisture, but does absorb oil;7 Inch RK3326 CPU Android WIFI Tablet PC-, soil-, and fire-Tablet PC. Its low absorbency also makes it naturally resistant to stains.Lpg Thermostatic Gas Valve Insert Magnet for Commercial Kitchen,Cooking Appliance Oven Parts Gas Geyser Magnetic Valve.Gas Safety Valve Assembly Big Solenoid, and not damaged by mildew.Top Time Thermocouple Safety Protection Solenoid Valve, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Gas Solenoid Valve for Oven-based E.I. du Pont de Nemours and Co.Safety Control Gas Magnet Valve. This early research, headed by W.H. Carothers,Gas Stove Burner Igniter Parts Magnet Unit Valve, 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,Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Universal Gas Sensor Magnet Valve for Heater,Gas Boiler Magnetic Valve for Oven. 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.Electoral Magnet valve, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gas Fireplace Magnet Valve.

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,Solenoid Valve BBQ. In this process, ethylene is the polymer, the chemical building block of polyester,Nickel Alloy Orkli Thermocouple Head.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Spare Parts Stove Thermocouple. The four basic forms are filament,Gas Fireplace Temperature Sensor Thermocouple, tow, and fiberfill. In the filament form,Gas Cooker Thermopile Sensors, producing smooth-Gas Barbecue Thermocouple for Home Appliance.Gas Barbecue Thermocouple for Kitchenware, filaments are cut to short,Brass Wire Thermocouple Flame Sensor for Gas Oven.Flexible Thermocouple. 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.Gas Thermocouple.

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-Thermocouple for Gas Oven,Gas Magnet Valve for Flame Failure Device, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Magnet Valve. 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.Electromagnetic Valves, which are usually round,Bottle Cap Printer Machine. The number of holes in the spinneret determines the size of the yarn,SMC Sheet Automatic Cutter 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,SMC Sheet Cutting 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,Cap assembling Machine For Add Aluminium Foil.
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Winding

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

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Auto Cap Liner Machine, 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,Aluminium Foil Cap Liner Machine. The rope-Easy Operation Cap liner Machine.

Drawing tow

• 1 Newly-Cap Liner Machine For Add Gasket.Plastic Cap Liner Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Bottle Cap Liner Machine, at a rate of 9-15 crimps per inch (3-6 per cm).High Speed Cap Slitting Folding Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)38mm Mineral Water Cap Folding Slitting Machine.Automatic Cap Slitting Folding Machine.

Cutting

• 4 Following heat setting,Bottle Cap Slitting Folding Machine. 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)28MM Pet Preform Mould.48MM Pet Preform Mould, such ascarpet,polyester filaments are cut into 6 inch (15 cm)30/25 PP Preform Mould.

The Future

Cap Assembly Machine For Add Foam Liner,Cap Assembly Machine For Add Washers's fastest-growing fiber.Flip Top Cap Assembly Machine. 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,Push Pull Cap Assembly Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Sport Cap Assembly Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Press Cap Assembly Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.