Polyester

Background

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

History

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

The Manufacturing
Process

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

Drying

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

Drawing tow

• 1 Newly-Easy Operation Cap liner Machine.Cap Liner Machine For Add Gasket.

Crimping

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

Setting

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

Cutting

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

The Future

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