Polyester

Background

13.3 Inch Yoga Like Windows Intel Laptop, air, water, and petroleum. Developed in a 20th-century laboratory,11.6 Inch Yoga Like Windows Intel Laptop. In this reaction,14.1 Inch Windows Intel Laptop.15.6 Inch Windows Intel Laptop.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Intel Laptop, computer and recording tapes, and electrical insulation.10.1 Inch Android AIO. It does not absorb moisture, but does absorb oil;Android AIO-, soil-, and fire-10.1 Inch Educational Android Tablet PC. Its low absorbency also makes it naturally resistant to stains.8 Inch Educational Android Tablet PC,7 Inch Educational Android Tablet PC.Educational Tablet PC, and not damaged by mildew.10.1 Inch Windows 2 In 1 Tablet PC, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,13.3 Inch Windows 2 In 1 Tablet PC-based E.I. du Pont de Nemours and Co.10.1 Inch 4G Android 2 In 1 Tablet PC. This early research, headed by W.H. Carothers,Android 2 in 1 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 1946,2 In 1 Tablet PC. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Android 7 Inch Rugged Tablet PC,Android 8 Inch Rugged 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.Android 10.1 Inch Rugged Tablet PC, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Windows 10.1 Inch Rugged Tablet PC.

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,11.6 Inch Surface Windows 2 In 1 Tablet PC. In this process, ethylene is the polymer, the chemical building block of polyester,8 Inch Windows 10 education Tablet PC Z8350 1280X800 2GB Ram 64 Rom.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Windows Intel Tablet PC. The four basic forms are filament,10.1 Inch MTK6762 Octa Core CPU Android 4G LTE Tablet PC, tow, and fiberfill. In the filament form,10.1 Inch MT6739 CPU Android 4G LTE Tablet PC, producing smooth-10.1 Inch SC9832 CPU Android 4G LTE Tablet PC.7 Inch SC7731E CPU Android 3G Tablet PC, filaments are cut to short,7 Inch MTK8321 CPU Android 3G Tablet PC.8 Inch MTK6580 CPU Android 3G Tablet PC. 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.8 Inch SC7731E CPU Android 3G Tablet PC.

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-10.1 Inch MTK6580 CPU Android 3G Tablet PC,Android 3G Tablet PC, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,10 Inch MTK8168 CPU Android 10.0 OS Wifi Tablet PC. 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.10 Inch MTK8163 CPU Android WIFI Tablet PC, which are usually round,8 Inch RK3368 CPU Android WIFI Tablet PC. The number of holes in the spinneret determines the size of the yarn,7 Inch RK3326 CPU Android WIFI Tablet PC.
• 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,Tablet PC. 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,Lpg Thermostatic Gas Valve Insert Magnet for Commercial Kitchen.
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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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Gas Stove Burner Igniter Parts Magnet Unit 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,Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector. The rope-Universal Gas Sensor Magnet Valve for Heater.

Drawing tow

• 1 Newly-Gas Boiler Magnetic Valve for Oven.Electoral Magnet valve.

Crimping

• 2 Drawn tow is then fed into compression boxes,Gas Fireplace Magnet Valve, at a rate of 9-15 crimps per inch (3-6 per cm).Solenoid Valve BBQ.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Nickel Alloy Orkli Thermocouple Head.Spare Parts Stove Thermocouple.

Cutting

• 4 Following heat setting,Gas Fireplace Temperature Sensor Thermocouple. 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)Gas Cooker Thermopile Sensors.Gas Barbecue Thermocouple for Home Appliance, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Gas Barbecue Thermocouple for Kitchenware.

The Future

Brass Wire Thermocouple Flame Sensor for Gas Oven,Flexible Thermocouple's fastest-growing fiber.Gas Thermocouple. 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,Thermocouple for Gas Oven, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Gas Magnet Valve for Flame Failure Device. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Magnet Valve, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.