Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,Woodworking Furniture Door Vacuum Press Machine, computer and recording tapes, and electrical insulation.Door Vacuum Press Laminating Machine. It does not absorb moisture, but does absorb oil;Wood Grain Film Transfer Vacuum Press Machine-, soil-, and fire-No glue funiture door membrane vacuum press machine. Its low absorbency also makes it naturally resistant to stains.Wood Grain Heat Transfer Vacuum Membrane Press Machine,PVC MDF Door Vacuum Membrane Press Machine.Door Laminating Vacuum Membrane Press Machine, and not damaged by mildew.Full Automatic Door Vacuum Membrane Press Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Auto Pin System Vacuum Membrane Press Machine-based E.I. du Pont de Nemours and Co.Positive And Negative Membrane Press Machine. This early research, headed by W.H. Carothers,320W Greenhouse Light, 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,Full Spectrum Grow Light 680W. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.720W Grow Light Full Spectrum 660nm,1000W Grow Light Full Spectrum 660nm. 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.LED Grow Light Replacing CMH 630W, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.8 Bars Vertical Farming Grow Light 720W.

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,960W Vertical Farming Grow Light. In this process, ethylene is the polymer, the chemical building block of polyester,10 Bars Vertical Farming Grow Light 960W.

The Manufacturing
Process

Polyester is manufactured by one of several methods.8 Bars Vertical Farming Grow Light With Seoul LED. The four basic forms are filament,Grow Tent Light, tow, and fiberfill. In the filament form,320W Grow Light Lm301h For Indoor Plants, producing smooth-480W Grow light LM301H for indoor plants.LED Indoor Grow light 640W, filaments are cut to short,720W Indoor Grow Light With Samsung LM301B.Indoor Grow Light 720W With Seoul LED. 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.LED Indoor Grow Light 840W.

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-Indoor Grow Light 840W With Seoul LED,840W Grow Light LM301H For Indoor Plants, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ELENOR X8 LED indoor grow light 960W. 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.8 Bars LED Indoor Grow Light 640W, which are usually round,8 Bars LED Indoor Grow Light 680W. The number of holes in the spinneret determines the size of the yarn,Led Grow Light.
• 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,Aluminum Bar. 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,Aluminum Tubes.
• Extruded Aluminium Tube,Extruded Aluminium Tube. Also,Aluminum tube,Harmonica Tube.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Aluminium High Frequency Welded Tube

High frequency welded pipe, 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,Aluminum Radiator Tubes. The rope-Harmonica Tube.

Drawing tow

• 1 Newly-Intercooler tubes.aluminum fin.

Crimping

• 2 Drawn tow is then fed into compression boxes,Heat Exchanger Tubes, at a rate of 9-15 crimps per inch (3-6 per cm).Aluminum Round Tubes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Aluminum Condenser Tubes.Aluminum Radiator Tubes.

Cutting

• 4 Following heat setting,Aluminum Tubes. 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)Aluminum Sheet plate.Thin Aluminum Strip, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum fin.

The Future

Aluminum Raw Material,Automatic Core Assembly Machine's fastest-growing fiber.Core Assembly 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,Pipe Making Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Tube Making Machine. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Radiator Tube Making Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.