Polyester

Background

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

History

In 1926,Universal Gas Sensor Magnet Valve for Heater-based E.I. du Pont de Nemours and Co.Gas Boiler Magnetic Valve for Oven. This early research, headed by W.H. Carothers,Electoral 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 Fireplace Magnet Valve. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Solenoid Valve BBQ,Nickel Alloy Orkli Thermocouple Head. 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.Spare Parts Stove Thermocouple, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gas Fireplace Temperature Sensor 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 Cooker Thermopile Sensors. In this process, ethylene is the polymer, the chemical building block of polyester,Gas Barbecue Thermocouple for Home Appliance.

The Manufacturing
Process

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

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-Bottle Cap Printer Machine,SMC Sheet Automatic Cutter Machine, is extruded through a slot to form long ribbons.

Drying

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

Drawing tow

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

Crimping

• 2 Drawn tow is then fed into compression boxes,Bottle Cap Slitting Folding Machine, at a rate of 9-15 crimps per inch (3-6 per cm).28MM Pet Preform Mould.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)48MM Pet Preform Mould.30/25 PP Preform Mould.

Cutting

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

The Future

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