Polyester

Background

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

History

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

The Manufacturing
Process

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

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-30/25 PP Preform Mould,Cap Assembly Machine For Add Foam Liner, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Cap Assembly Machine For Add Washers. 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.Flip Top Cap Assembly Machine, which are usually round,Push Pull Cap Assembly Machine. The number of holes in the spinneret determines the size of the yarn,Sport 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,Press 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,Plastic Cap Assembly Machine.
• Bottle Cap Assembly Machine,Mineral Water Cap Slitting Machine. Also,Medicine Cap Cutting Machine,28mm Plastic Cap Slitting 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 Cutting Machine

Plastic Cap Printing 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 Printing Machine. The rope-Automatic Cap Lining Machine.

Drawing tow

• 1 Newly-Auto Cap Lining Machine.Bottle Cap Lining Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Handheld Massage Gun.Foot Massager Spa Machine.

Cutting

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

The Future

Electric Eye Massager,Eye Massager With Heat's fastest-growing fiber.Eye Massager For Dry Eyes. 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,Professional 4D Massage Chair, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,4D Massage Chair With Footrest. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.4D Electric 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.