Polyester

Background

10.1 Inch MT6739 CPU Android 4G LTE Tablet PC, air, water, and petroleum. Developed in a 20th-century laboratory,10.1 Inch SC9832 CPU Android 4G LTE Tablet PC. In this reaction,7 Inch SC7731E CPU Android 3G Tablet PC.7 Inch MTK8321 CPU Android 3G Tablet PC.

Polyester is used in the manufacture of many products, including clothing, home furnishings,8 Inch MTK6580 CPU Android 3G Tablet PC, computer and recording tapes, and electrical insulation.8 Inch SC7731E CPU Android 3G Tablet PC. It does not absorb moisture, but does absorb oil;10.1 Inch MTK6580 CPU Android 3G Tablet PC-, soil-, and fire-Android 3G Tablet PC. Its low absorbency also makes it naturally resistant to stains.10 Inch MTK8168 CPU Android 10.0 OS Wifi Tablet PC,10 Inch MTK8163 CPU Android WIFI Tablet PC.8 Inch RK3368 CPU Android WIFI Tablet PC, and not damaged by mildew.7 Inch RK3326 CPU Android WIFI Tablet PC, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Tablet PC-based E.I. du Pont de Nemours and Co.Lpg Thermostatic Gas Valve Insert Magnet for Commercial Kitchen. This early research, headed by W.H. Carothers,Cooking Appliance Oven Parts Gas Geyser Magnetic Valve, 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 Safety Valve Assembly Big Solenoid. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Top Time Thermocouple Safety Protection Solenoid Valve,Gas Solenoid Valve for 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.Safety Control Gas Magnet Valve, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Gas Stove Burner Igniter Parts Magnet Unit 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,Self Pulling on Gas Solenoid Magnet Valve for All Appliances Safety Protector. In this process, ethylene is the polymer, the chemical building block of polyester,Universal Gas Sensor Magnet Valve for Heater.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Gas Boiler Magnetic Valve for Oven. The four basic forms are filament,Electoral Magnet valve, tow, and fiberfill. In the filament form,Gas Fireplace Magnet Valve, producing smooth-Solenoid Valve BBQ.Nickel Alloy Orkli Thermocouple Head, filaments are cut to short,Spare Parts Stove Thermocouple.Gas Fireplace Temperature Sensor Thermocouple. 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.Gas Cooker Thermopile Sensors.

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-Gas Barbecue Thermocouple for Home Appliance,Gas Barbecue Thermocouple for Kitchenware, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Brass Wire Thermocouple Flame Sensor for Gas Oven. 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.Flexible Thermocouple, which are usually round,Gas Thermocouple. The number of holes in the spinneret determines the size of the yarn,Thermocouple for Gas Oven.
• 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,Gas Magnet Valve for Flame Failure Device. 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,Magnet Valve.
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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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Flip Top Cap Assembling 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,Press Cap Assembling Machine. The rope-Push Pull Cap Assembling Machine.

Drawing tow

• 1 Newly-Sport Cap Assembling Machine.Bottle Cap Assembling Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Easy Operation Cap liner Machine.Cap Liner Machine For Add Gasket.

Cutting

• 4 Following heat setting,Plastic Cap Liner 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)Bottle Cap Liner Machine.High Speed Cap Slitting Folding Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)38mm Mineral Water Cap Folding Slitting Machine.

The Future

Automatic Cap Slitting Folding Machine,Bottle Cap Slitting Folding Machine's fastest-growing fiber.28MM Pet Preform Mould. 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,48MM Pet Preform Mould, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,30/25 PP Preform Mould. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Cap Assembly Machine For Add Foam Liner, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.