Polyester

Background

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

History

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

The Manufacturing
Process

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

Drying

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

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Flip Top Cap Assembly Machine

Push Pull 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,Sport Cap Assembly Machine. The rope-Press Cap Assembly Machine.

Drawing tow

• 1 Newly-Plastic Cap Assembly Machine.Bottle Cap Assembly Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)28mm Plastic Cap Slitting Machine.Bottle Cap Cutting Machine.

Cutting

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

The Future

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