Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Windows Intel Tablet PC, computer and recording tapes, and electrical insulation.10.1 Inch MTK6762 Octa Core CPU Android 4G LTE Tablet PC. It does not absorb moisture, but does absorb oil;10.1 Inch MT6739 CPU Android 4G LTE Tablet PC-, soil-, and fire-10.1 Inch SC9832 CPU Android 4G LTE Tablet PC. Its low absorbency also makes it naturally resistant to stains.7 Inch SC7731E CPU Android 3G Tablet PC,7 Inch MTK8321 CPU Android 3G Tablet PC.8 Inch MTK6580 CPU Android 3G Tablet PC, and not damaged by mildew.8 Inch SC7731E CPU Android 3G Tablet PC, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,10.1 Inch MTK6580 CPU Android 3G Tablet PC-based E.I. du Pont de Nemours and Co.Android 3G Tablet PC. This early research, headed by W.H. Carothers,10 Inch MTK8168 CPU Android 10.0 OS Wifi Tablet PC, 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 1946,10 Inch MTK8163 CPU Android WIFI Tablet PC. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.8 Inch RK3368 CPU Android WIFI Tablet PC,7 Inch RK3326 CPU Android WIFI Tablet PC. 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.Tablet PC, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Lpg Thermostatic Gas Valve Insert Magnet for Commercial Kitchen.

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,Cooking Appliance Oven Parts Gas Geyser Magnetic Valve. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Safety Valve Assembly Big Solenoid.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Top Time Thermocouple Safety Protection Solenoid Valve. The four basic forms are filament,Gas Solenoid Valve for Oven, tow, and fiberfill. In the filament form,Safety Control Gas Magnet Valve, producing smooth-Gas Stove Burner Igniter Parts Magnet Unit Valve.Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector, filaments are cut to short,Universal Gas Sensor Magnet Valve for Heater.Gas Boiler Magnetic Valve for Oven. 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.Electoral Magnet valve.

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-Gas Fireplace Magnet Valve,Solenoid Valve BBQ, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Nickel Alloy Orkli Thermocouple Head. 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.Spare Parts Stove Thermocouple, which are usually round,Gas Fireplace Temperature Sensor Thermocouple. The number of holes in the spinneret determines the size of the yarn,Gas Cooker Thermopile Sensors.
• 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,Gas Barbecue Thermocouple for Home Appliance. 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,Gas Barbecue Thermocouple for Kitchenware.
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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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Magnet Valve, 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,Electromagnetic Valves. The rope-Bottle Cap Printer Machine.

Drawing tow

• 1 Newly-SMC Sheet Automatic Cutter Machine.SMC Sheet Cutting Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Cap assembling Machine For Add Aluminium Foil, at a rate of 9-15 crimps per inch (3-6 per cm).Flip Top Cap Assembling Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Press Cap Assembling Machine.Push Pull Cap Assembling Machine.

Cutting

• 4 Following heat setting,Sport Cap Assembling 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)Bottle Cap Assembling Machine.Auto Cap Liner Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminium Foil Cap Liner Machine.

The Future

Easy Operation Cap liner Machine,Cap Liner Machine For Add Gasket's fastest-growing fiber.Plastic Cap Liner 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,Bottle Cap Liner Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,High Speed Cap Slitting Folding Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.38mm Mineral Water Cap Folding Slitting Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.