Polyester

Background

Safety Control Gas Magnet Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Gas Stove Burner Igniter Parts Magnet Unit Valve. In this reaction,Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector.Universal Gas Sensor Magnet Valve for Heater.

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

History

In 1926,Gas Barbecue Thermocouple for Home Appliance-based E.I. du Pont de Nemours and Co.Gas Barbecue Thermocouple for Kitchenware. This early research, headed by W.H. Carothers,Brass Wire Thermocouple Flame Sensor 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,Flexible Thermocouple. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Gas Thermocouple,Thermocouple 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.Gas Magnet Valve for Flame Failure Device, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Magnet Valve.

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,Electromagnetic Valves. In this process, ethylene is the polymer, the chemical building block of polyester,Bottle Cap Printer Machine.

The Manufacturing
Process

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

Drying

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

Winding

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

30/25 PP Preform Mould

Cap Assembly Machine For Add Foam Liner, 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,Cap Assembly Machine For Add Washers. The rope-Flip Top Cap Assembly Machine.

Drawing tow

• 1 Newly-Push Pull Cap Assembly Machine.Sport Cap Assembly Machine.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Medicine Cap Cutting 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)28mm Plastic Cap Slitting Machine.Bottle Cap Cutting Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Plastic Cap Printing Machine.

The Future

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