Polyester

Background

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

History

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

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,1000W Grow Light Full Spectrum 660nm. In this process, ethylene is the polymer, the chemical building block of polyester,LED Grow Light Replacing CMH 630W.

The Manufacturing
Process

Polyester is manufactured by one of several methods.8 Bars Vertical Farming Grow Light 720W. The four basic forms are filament,960W Vertical Farming Grow Light, tow, and fiberfill. In the filament form,10 Bars Vertical Farming Grow Light 960W, producing smooth-8 Bars Vertical Farming Grow Light With Seoul LED.Grow Tent Light, filaments are cut to short,320W Grow Light Lm301h For Indoor Plants.480W Grow light LM301H for indoor plants. 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 640W.

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-720W Indoor Grow Light With Samsung LM301B,Indoor Grow Light 720W With Seoul LED, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,LED Indoor Grow Light 840W. 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.Indoor Grow Light 840W With Seoul LED, which are usually round,840W Grow Light LM301H For Indoor Plants. The number of holes in the spinneret determines the size of the yarn,ELENOR X8 LED indoor grow light 960W.
• 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,8 Bars LED Indoor Grow Light 640W. 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 LED Indoor Grow Light 680W.
• Led Grow Light,Aluminum Bar. Also,Aluminum Tubes,Extruded Aluminium 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.

Extruded Aluminium Tube

Aluminum tube, 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,Harmonica Tube. The rope-Aluminium High Frequency Welded Tube.

Drawing tow

• 1 Newly-High frequency welded pipe.Aluminum Radiator Tubes.

Crimping

• 2 Drawn tow is then fed into compression boxes,Harmonica Tube, at a rate of 9-15 crimps per inch (3-6 per cm).Intercooler tubes.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)aluminum fin.Heat Exchanger Tubes.

Cutting

• 4 Following heat setting,Aluminum Round 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 Condenser Tubes.Aluminum Radiator Tubes, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum Tubes.

The Future

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