Polyester

Background

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

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Thermocouple for Gas Oven. The four basic forms are filament,Gas Magnet Valve for Flame Failure Device, tow, and fiberfill. In the filament form,Magnet Valve, producing smooth-Electromagnetic Valves.Bottle Cap Printer Machine, filaments are cut to short,SMC Sheet Automatic Cutter Machine.SMC Sheet Cutting 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.Cap assembling Machine For Add Aluminium Foil.

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-Flip Top Cap Assembling Machine,Press Cap Assembling Machine, is extruded through a slot to form long ribbons.

Drying

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

38mm Mineral Water Cap Folding Slitting Machine

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

Drawing tow

• 1 Newly-48MM Pet Preform Mould.30/25 PP Preform Mould.

Crimping

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

Setting

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

Cutting

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

The Future

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