Polyester

Background

7 Inch MTK8321 CPU Android 3G Tablet PC, air, water, and petroleum. Developed in a 20th-century laboratory,8 Inch MTK6580 CPU Android 3G Tablet PC. In this reaction,8 Inch SC7731E CPU Android 3G Tablet PC.10.1 Inch MTK6580 CPU Android 3G Tablet PC.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Android 3G Tablet PC, computer and recording tapes, and electrical insulation.10 Inch MTK8168 CPU Android 10.0 OS Wifi Tablet PC. It does not absorb moisture, but does absorb oil;10 Inch MTK8163 CPU Android WIFI Tablet PC-, soil-, and fire-8 Inch RK3368 CPU Android WIFI Tablet PC. Its low absorbency also makes it naturally resistant to stains.7 Inch RK3326 CPU Android WIFI Tablet PC,Tablet PC.Lpg Thermostatic Gas Valve Insert Magnet for Commercial Kitchen, and not damaged by mildew.Cooking Appliance Oven Parts Gas Geyser Magnetic Valve, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

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,Electoral Magnet valve. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Fireplace Magnet Valve.

The Manufacturing
Process

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

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-Flexible Thermocouple,Gas Thermocouple, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Thermocouple for Gas Oven. 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.Gas Magnet Valve for Flame Failure Device, which are usually round,Magnet Valve. The number of holes in the spinneret determines the size of the yarn,Electromagnetic Valves.
• 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,Bottle Cap Printer 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,SMC Sheet Automatic Cutter Machine.
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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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Sport Cap Assembling 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,Bottle Cap Assembling Machine. The rope-Auto Cap Liner Machine.

Drawing tow

• 1 Newly-Aluminium Foil Cap Liner Machine.Easy Operation Cap liner Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Cap Liner Machine For Add Gasket, at a rate of 9-15 crimps per inch (3-6 per cm).Plastic Cap Liner Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Bottle Cap Liner Machine.High Speed Cap Slitting Folding Machine.

Cutting

• 4 Following heat setting,38mm Mineral Water Cap Folding Slitting 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)Automatic Cap Slitting Folding Machine.Bottle Cap Slitting Folding Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)28MM Pet Preform Mould.

The Future

48MM Pet Preform Mould,30/25 PP Preform Mould's fastest-growing fiber.Cap Assembly Machine For Add Foam Liner. 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,Cap Assembly Machine For Add Washers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Flip Top Cap Assembly Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Push Pull 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.