Polyester

Background

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Polyester is used in the manufacture of many products, including clothing, home furnishings,High Gloss Pvc vacuum laminating machine, computer and recording tapes, and electrical insulation.vacuum laminating machine. It does not absorb moisture, but does absorb oil;Laminate Film Cutting And Slitting Machine-, soil-, and fire-Wrapping Film Cutting And Slitting Machine. Its low absorbency also makes it naturally resistant to stains.Multifunction Slitting Machine,Round Knife Film Cutting And Slitting Machine.Film Cutting And Slitting Machine, and not damaged by mildew.Curved Part Floor Brush Sanding Polishing Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Manual Curved Mini Brush Sanding Machine For Wood-based E.I. du Pont de Nemours and Co.Board And Door Profile Sanding Polishing Machine. This early research, headed by W.H. Carothers,Profile Sanding Polishing 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,Profile Wrapping Machine For MDF. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Door And Window Frame Profile Wrapping Machine,Aluminium WPC UPVC PVC Profile Wrapping 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.Profile Wrapping Laminate Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Woodworking Furniture Door Vacuum Press 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,Door Vacuum Press Laminating Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Wood Grain Film Transfer Vacuum Press Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.No glue funiture door membrane vacuum press machine. The four basic forms are filament,Wood Grain Heat Transfer Vacuum Membrane Press Machine, tow, and fiberfill. In the filament form,PVC MDF Door Vacuum Membrane Press Machine, producing smooth-Door Laminating Vacuum Membrane Press Machine.Full Automatic Door Vacuum Membrane Press Machine, filaments are cut to short,Auto Pin System Vacuum Membrane Press Machine.Positive And Negative Membrane Press 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.320W Greenhouse Light.

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-Full Spectrum Grow Light 680W,720W Grow Light Full Spectrum 660nm, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,1000W Grow Light Full Spectrum 660nm. 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.LED Grow Light Replacing CMH 630W, which are usually round,8 Bars Vertical Farming Grow Light 720W. The number of holes in the spinneret determines the size of the yarn,960W Vertical Farming 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,10 Bars Vertical Farming Grow Light 960W. 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,8 Bars Vertical Farming Grow Light With Seoul LED.
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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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Indoor Grow Light 720W With Seoul LED, 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,LED Indoor Grow Light 840W. The rope-Indoor Grow Light 840W With Seoul LED.

Drawing tow

• 1 Newly-840W Grow Light LM301H For Indoor Plants.ELENOR X8 LED indoor grow light 960W.

Crimping

• 2 Drawn tow is then fed into compression boxes,8 Bars LED Indoor Grow Light 640W, at a rate of 9-15 crimps per inch (3-6 per cm).8 Bars LED Indoor Grow Light 680W.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Led Grow Light.Aluminum Bar.

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)Extruded Aluminium Tube.Extruded Aluminium Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum tube.

The Future

Harmonica Tube,Aluminium High Frequency Welded Tube's fastest-growing fiber.High frequency welded pipe. 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,Aluminum Radiator Tubes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Harmonica Tube. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Intercooler tubes, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.