Polyester

Background

Brass Wire Thermocouple Flame Sensor for Gas Oven, air, water, and petroleum. Developed in a 20th-century laboratory,Flexible Thermocouple. In this reaction,Gas Thermocouple.Thermocouple for Gas Oven.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Gas Magnet Valve for Flame Failure Device, computer and recording tapes, and electrical insulation.Magnet Valve. It does not absorb moisture, but does absorb oil;Electromagnetic Valves-, soil-, and fire-Bottle Cap Printer Machine. Its low absorbency also makes it naturally resistant to stains.SMC Sheet Automatic Cutter Machine,SMC Sheet Cutting Machine.Cap assembling Machine For Add Aluminium Foil, and not damaged by mildew.Flip Top Cap Assembling Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Press Cap Assembling Machine-based E.I. du Pont de Nemours and Co.Push Pull Cap Assembling Machine. This early research, headed by W.H. Carothers,Sport Cap Assembling Machine, 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,Bottle Cap Assembling Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Auto Cap Liner Machine,Aluminium Foil Cap Liner 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.Easy Operation Cap liner Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Cap Liner Machine For Add Gasket.

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,Plastic Cap Liner Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Bottle Cap Liner Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.High Speed Cap Slitting Folding Machine. The four basic forms are filament,38mm Mineral Water Cap Folding Slitting Machine, tow, and fiberfill. In the filament form,Automatic Cap Slitting Folding Machine, producing smooth-Bottle Cap Slitting Folding Machine.28MM Pet Preform Mould, filaments are cut to short,48MM Pet Preform Mould.30/25 PP Preform Mould. 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 Assembly Machine For Add Foam Liner.

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 Assembly Machine For Add Washers,Flip Top Cap Assembly Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Push Pull Cap Assembly 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.Sport Cap Assembly Machine, which are usually round,Press Cap Assembly Machine. The number of holes in the spinneret determines the size of the yarn,Plastic Cap Assembly 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 Assembly 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,Mineral Water Cap Slitting Machine.
• Medicine Cap Cutting Machine,28mm Plastic Cap Slitting Machine. Also,Bottle Cap Cutting Machine,Plastic Cap Printing 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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Automatic Cap Lining 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,Auto Cap Lining Machine. The rope-Bottle Cap Lining Machine.

Drawing tow

• 1 Newly-Vibration Massage Gun.Fascia Massage Gun.

Crimping

• 2 Drawn tow is then fed into compression boxes,Handheld Massage Gun, at a rate of 9-15 crimps per inch (3-6 per cm).Foot Massager Spa Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kneading Foot Massager.Electric Hand Massager Tool.

Cutting

• 4 Following heat setting,Neck Massager. 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)Air Pressure Eye Massager.Electric Eye Massager, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Eye Massager With Heat.

The Future

Eye Massager For Dry Eyes,Professional 4D Massage Chair's fastest-growing fiber.4D Massage Chair With Footrest. 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,4D Electric Massage Chair, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Shiatsu 4D Massage Chair. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Automatic 4D Massage Chair, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.