Polyester

Background

Top Time Thermocouple Safety Protection Solenoid Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Gas Solenoid Valve for Oven. In this reaction,Safety Control Gas Magnet Valve.Gas Stove Burner Igniter Parts Magnet Unit Valve.

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

History

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

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 Magnet Valve for Flame Failure Device. In this process, ethylene is the polymer, the chemical building block of polyester,Magnet Valve.

The Manufacturing
Process

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

Drying

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

28MM Pet Preform Mould

48MM Pet Preform Mould, 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,30/25 PP Preform Mould. The rope-Cap Assembly Machine For Add Foam Liner.

Drawing tow

• 1 Newly-Cap Assembly Machine For Add Washers.Flip Top Cap Assembly Machine.

Crimping

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

Setting

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

Cutting

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

The Future

Bottle Cap Cutting Machine,Plastic Cap Printing Machine's fastest-growing fiber.Bottle Cap Printing 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,Automatic Cap Lining Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Auto Cap Lining Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Bottle 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.