Polyester

Background

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

History

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

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,Spare Parts Stove Thermocouple. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Fireplace Temperature Sensor Thermocouple.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Gas Cooker Thermopile Sensors. The four basic forms are filament,Gas Barbecue Thermocouple for Home Appliance, tow, and fiberfill. In the filament form,Gas Barbecue Thermocouple for Kitchenware, producing smooth-Brass Wire Thermocouple Flame Sensor for Gas Oven.Flexible Thermocouple, filaments are cut to short,Gas Thermocouple.Thermocouple 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.Gas Magnet Valve for Flame Failure Device.

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-Magnet Valve,Electromagnetic Valves, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Bottle Cap Printer Machine. 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.SMC Sheet Automatic Cutter Machine, which are usually round,SMC Sheet Cutting Machine. The number of holes in the spinneret determines the size of the yarn,Cap assembling Machine For Add Aluminium Foil.
• 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,Flip Top Cap Assembling 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,Press Cap Assembling Machine.
• Push Pull Cap Assembling Machine,Sport Cap Assembling Machine. Also,Bottle Cap Assembling Machine,Auto Cap Liner Machine.

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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Easy Operation Cap liner 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,Cap Liner Machine For Add Gasket. The rope-Plastic Cap Liner Machine.

Drawing tow

• 1 Newly-Bottle Cap Liner Machine.High Speed Cap Slitting Folding Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,38mm Mineral Water Cap Folding Slitting Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Automatic Cap Slitting Folding Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Bottle Cap Slitting Folding Machine.28MM Pet Preform Mould.

Cutting

• 4 Following heat setting,48MM Pet Preform Mould. 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)30/25 PP Preform Mould.Cap Assembly Machine For Add Foam Liner, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Cap Assembly Machine For Add Washers.

The Future

Flip Top Cap Assembly Machine,Push Pull Cap Assembly Machine's fastest-growing fiber.Sport Cap Assembly 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,Press Cap Assembly Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Plastic Cap Assembly Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Bottle 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.