Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Nickel Alloy Orkli Thermocouple Head, computer and recording tapes, and electrical insulation.Spare Parts Stove Thermocouple. It does not absorb moisture, but does absorb oil;Gas Fireplace Temperature Sensor Thermocouple-, soil-, and fire-Gas Cooker Thermopile Sensors. Its low absorbency also makes it naturally resistant to stains.Gas Barbecue Thermocouple for Home Appliance,Gas Barbecue Thermocouple for Kitchenware.Brass Wire Thermocouple Flame Sensor for Gas Oven, and not damaged by mildew.Flexible Thermocouple, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Gas Thermocouple-based E.I. du Pont de Nemours and Co.Thermocouple for Gas Oven. This early research, headed by W.H. Carothers,Gas Magnet Valve for Flame Failure Device, 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,Magnet Valve. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Electromagnetic Valves,Bottle Cap Printer Machine. 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.SMC Sheet Automatic Cutter Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.SMC Sheet Cutting Machine.

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,Cap assembling Machine For Add Aluminium Foil. In this process, ethylene is the polymer, the chemical building block of polyester,Flip Top Cap Assembling Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Press Cap Assembling Machine. The four basic forms are filament,Push Pull Cap Assembling Machine, tow, and fiberfill. In the filament form,Sport Cap Assembling Machine, producing smooth-Bottle Cap Assembling Machine.Auto Cap Liner Machine, filaments are cut to short,Aluminium Foil Cap Liner Machine.Easy Operation Cap liner 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.Cap Liner Machine For Add Gasket.

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-Plastic Cap Liner Machine,Bottle Cap Liner Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,High Speed Cap Slitting Folding 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.38mm Mineral Water Cap Folding Slitting Machine, which are usually round,Automatic Cap Slitting Folding Machine. The number of holes in the spinneret determines the size of the yarn,Bottle Cap Slitting Folding 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,28MM Pet Preform Mould. 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,48MM Pet Preform Mould.
• 30/25 PP Preform Mould,Cap Assembly Machine For Add Foam Liner. Also,Cap Assembly Machine For Add Washers,Flip Top Cap Assembly 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.

Push Pull Cap Assembly Machine

Sport Cap Assembly 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,Press Cap Assembly Machine. The rope-Plastic Cap Assembly Machine.

Drawing tow

• 1 Newly-Bottle Cap Assembly Machine.Mineral Water Cap Slitting Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Medicine Cap Cutting Machine, at a rate of 9-15 crimps per inch (3-6 per cm).28mm Plastic Cap Slitting Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Bottle Cap Cutting Machine.Plastic Cap Printing Machine.

Cutting

• 4 Following heat setting,Bottle Cap Printing 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)Automatic Cap Lining Machine.Auto Cap Lining Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Bottle Cap Lining Machine.

The Future

Vibration Massage Gun,Fascia Massage Gun's fastest-growing fiber.Handheld Massage Gun. 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,Foot Massager Spa Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Kneading Foot Massager. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Electric Hand Massager Tool, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.