Polyester

Background

Nickel Alloy Orkli Thermocouple Head, air, water, and petroleum. Developed in a 20th-century laboratory,Spare Parts Stove Thermocouple. In this reaction,Gas Fireplace Temperature Sensor Thermocouple.Gas Cooker Thermopile Sensors.

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

History

In 1926,Electromagnetic Valves-based E.I. du Pont de Nemours and Co.Bottle Cap Printer Machine. This early research, headed by W.H. Carothers,SMC Sheet Automatic Cutter Machine, 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,SMC Sheet Cutting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Cap assembling Machine For Add Aluminium Foil,Flip Top Cap Assembling 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.Press Cap Assembling Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Push Pull 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,Sport Cap Assembling Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Bottle Cap Assembling Machine.

The Manufacturing
Process

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

Drying

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

Bottle Cap Assembly Machine

Mineral Water Cap Slitting 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,Medicine Cap Cutting Machine. The rope-28mm Plastic Cap Slitting Machine.

Drawing tow

• 1 Newly-Bottle Cap Cutting Machine.Plastic Cap Printing Machine.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Vibration Massage Gun. 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)Fascia Massage Gun.Handheld Massage Gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Foot Massager Spa Machine.

The Future

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