Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Gas Stove Burner Igniter Parts Magnet Unit Valve, computer and recording tapes, and electrical insulation.Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector. It does not absorb moisture, but does absorb oil;Universal Gas Sensor Magnet Valve for Heater-, soil-, and fire-Gas Boiler Magnetic Valve for Oven. Its low absorbency also makes it naturally resistant to stains.Electoral Magnet valve,Gas Fireplace Magnet Valve.Solenoid Valve BBQ, and not damaged by mildew.Nickel Alloy Orkli Thermocouple Head, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Magnet Valve. The four basic forms are filament,Electromagnetic Valves, tow, and fiberfill. In the filament form,Bottle Cap Printer Machine, producing smooth-SMC Sheet Automatic Cutter Machine.SMC Sheet Cutting Machine, filaments are cut to short,Cap assembling Machine For Add Aluminium Foil.Flip Top Cap Assembling Machine. 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.Press Cap Assembling Machine.

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-Push Pull Cap Assembling Machine,Sport Cap Assembling Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Bottle Cap Assembling 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.Auto Cap Liner Machine, which are usually round,Aluminium Foil Cap Liner Machine. The number of holes in the spinneret determines the size of the yarn,Easy Operation Cap liner 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,Cap Liner Machine For Add Gasket. 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,Plastic Cap Liner Machine.
• Bottle Cap Liner Machine,High Speed Cap Slitting Folding Machine. Also,38mm Mineral Water Cap Folding Slitting Machine,Automatic Cap Slitting Folding 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.

Bottle Cap Slitting Folding Machine

28MM Pet Preform Mould, 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,48MM Pet Preform Mould. The rope-30/25 PP Preform Mould.

Drawing tow

• 1 Newly-Cap Assembly Machine For Add Foam Liner.Cap Assembly Machine For Add Washers.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Plastic Cap Assembly 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 Assembly Machine.Mineral Water Cap Slitting Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Medicine Cap Cutting Machine.

The Future

28mm Plastic Cap Slitting Machine,Bottle Cap Cutting Machine's fastest-growing fiber.Plastic Cap Printing 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 Printing Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Automatic Cap Lining Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Auto Cap Lining Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.