Polyester

Background

Cooking Appliance Oven Parts Gas Geyser Magnetic Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Gas Safety Valve Assembly Big Solenoid. In this reaction,Top Time Thermocouple Safety Protection Solenoid Valve.Gas Solenoid Valve for Oven.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Safety Control Gas Magnet Valve, computer and recording tapes, and electrical insulation.Gas Stove Burner Igniter Parts Magnet Unit Valve. It does not absorb moisture, but does absorb oil;Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector-, soil-, and fire-Universal Gas Sensor Magnet Valve for Heater. Its low absorbency also makes it naturally resistant to stains.Gas Boiler Magnetic Valve for Oven,Electoral Magnet valve.Gas Fireplace Magnet Valve, and not damaged by mildew.Solenoid Valve BBQ, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Nickel Alloy Orkli Thermocouple Head-based E.I. du Pont de Nemours and Co.Spare Parts Stove Thermocouple. This early research, headed by W.H. Carothers,Gas Fireplace Temperature Sensor Thermocouple, 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 Cooker Thermopile Sensors. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Gas Barbecue Thermocouple for Home Appliance,Gas Barbecue Thermocouple for Kitchenware. 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.Brass Wire Thermocouple Flame Sensor for Gas Oven, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Flexible Thermocouple.

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,Gas Thermocouple. In this process, ethylene is the polymer, the chemical building block of polyester,Thermocouple for Gas Oven.

The Manufacturing
Process

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

Drying

• 3 After the polyester emerges from polymerization,Sport Cap Assembling 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.Bottle Cap Assembling Machine, which are usually round,Auto Cap Liner Machine. The number of holes in the spinneret determines the size of the yarn,Aluminium Foil 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,Easy Operation Cap liner 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,Cap Liner Machine For Add Gasket.
• Plastic Cap Liner Machine,Bottle Cap Liner Machine. Also,High Speed Cap Slitting Folding Machine,38mm Mineral Water Cap Folding 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.

Automatic Cap Slitting Folding Machine

Bottle Cap Slitting Folding 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,28MM Pet Preform Mould. The rope-48MM Pet Preform Mould.

Drawing tow

• 1 Newly-30/25 PP Preform Mould.Cap Assembly Machine For Add Foam Liner.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Push Pull Cap Assembly Machine.Sport Cap Assembly Machine.

Cutting

• 4 Following heat setting,Press Cap Assembly 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)Plastic Cap Assembly Machine.Bottle Cap Assembly Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Mineral Water Cap Slitting Machine.

The Future

Medicine Cap Cutting Machine,28mm Plastic Cap Slitting Machine's fastest-growing fiber.Bottle Cap Cutting 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,Plastic Cap Printing Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Bottle Cap Printing Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Automatic Cap Lining Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.