Polyester

Background

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

History

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

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 Temperature Sensor Thermocouple. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Cooker Thermopile Sensors.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Gas Barbecue Thermocouple for Home Appliance. The four basic forms are filament,Gas Barbecue Thermocouple for Kitchenware, tow, and fiberfill. In the filament form,Brass Wire Thermocouple Flame Sensor for Gas Oven, producing smooth-Flexible Thermocouple.Gas Thermocouple, filaments are cut to short,Thermocouple for Gas Oven.Gas Magnet Valve for Flame Failure Device. 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.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-Electromagnetic Valves,Bottle Cap Printer Machine, is extruded through a slot to form long ribbons.

Drying

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

Drawing tow

• 1 Newly-High Speed Cap Slitting Folding Machine.38mm Mineral Water Cap Folding Slitting Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)28MM Pet Preform Mould.48MM Pet Preform Mould.

Cutting

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

The Future

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