Polyester

Background

Gas Fireplace Magnet Valve, air, water, and petroleum. Developed in a 20th-century laboratory,Solenoid Valve BBQ. In this reaction,Nickel Alloy Orkli Thermocouple Head.Spare Parts Stove Thermocouple.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Gas Fireplace Temperature Sensor Thermocouple, computer and recording tapes, and electrical insulation.Gas Cooker Thermopile Sensors. It does not absorb moisture, but does absorb oil;Gas Barbecue Thermocouple for Home Appliance-, soil-, and fire-Gas Barbecue Thermocouple for Kitchenware. Its low absorbency also makes it naturally resistant to stains.Brass Wire Thermocouple Flame Sensor for Gas Oven,Flexible Thermocouple.Gas Thermocouple, and not damaged by mildew.Thermocouple for Gas Oven, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Gas Magnet Valve for Flame Failure Device-based E.I. du Pont de Nemours and Co.Magnet Valve. This early research, headed by W.H. Carothers,Electromagnetic Valves, 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,Bottle Cap Printer Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.SMC Sheet Automatic Cutter Machine,SMC Sheet Cutting Machine. 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.Cap assembling Machine For Add Aluminium Foil, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Flip Top Cap Assembling Machine.

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,Press Cap Assembling Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Push Pull Cap Assembling Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Sport Cap Assembling Machine. The four basic forms are filament,Bottle Cap Assembling Machine, tow, and fiberfill. In the filament form,Auto Cap Liner Machine, producing smooth-Aluminium Foil Cap Liner Machine.Easy Operation Cap liner Machine, filaments are cut to short,Cap Liner Machine For Add Gasket.Plastic Cap Liner 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 Liner 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-High Speed Cap Slitting Folding Machine,38mm Mineral Water Cap Folding Slitting Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Automatic Cap Slitting Folding 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 Slitting Folding Machine, which are usually round,28MM Pet Preform Mould. The number of holes in the spinneret determines the size of the yarn,48MM Pet Preform Mould.
• 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,30/25 PP Preform Mould. 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 Assembly Machine For Add Foam Liner.
• Cap Assembly Machine For Add Washers,Flip Top Cap Assembly Machine. Also,Push Pull Cap Assembly Machine,Sport Cap Assembly 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.

Press Cap Assembly Machine

Plastic Cap Assembly 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 Assembly Machine. The rope-Mineral Water Cap Slitting Machine.

Drawing tow

• 1 Newly-Medicine Cap Cutting Machine.28mm Plastic Cap Slitting Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Bottle Cap Printing Machine.Automatic Cap Lining Machine.

Cutting

• 4 Following heat setting,Auto Cap Lining 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 Lining Machine.Vibration Massage Gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Fascia Massage Gun.

The Future

Handheld Massage Gun,Foot Massager Spa Machine's fastest-growing fiber.Kneading Foot Massager. 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,Electric Hand Massager Tool, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Neck Massager. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Air Pressure Eye Massager, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.