Polyester

Background

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

History

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

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,Top Time Thermocouple Safety Protection Solenoid Valve. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Solenoid Valve for Oven.

The Manufacturing
Process

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

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-Nickel Alloy Orkli Thermocouple Head,Spare Parts Stove Thermocouple, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Gas Fireplace Temperature Sensor Thermocouple. 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 Cooker Thermopile Sensors, which are usually round,Gas Barbecue Thermocouple for Home Appliance. The number of holes in the spinneret determines the size of the yarn,Gas Barbecue Thermocouple for Kitchenware.
• 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,Brass Wire Thermocouple Flame Sensor for Gas Oven. 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,Flexible Thermocouple.
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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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Bottle Cap Printer 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,SMC Sheet Automatic Cutter Machine. The rope-SMC Sheet Cutting Machine.

Drawing tow

• 1 Newly-Cap assembling Machine For Add Aluminium Foil.Flip Top Cap Assembling Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Press Cap Assembling Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Push Pull Cap Assembling Machine.

Setting

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

Cutting

• 4 Following heat setting,Auto Cap Liner 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)Aluminium Foil Cap Liner Machine.Easy Operation Cap liner Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cap Liner Machine For Add Gasket.

The Future

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