Polyester

Background

High Gloss Pvc vacuum laminating machine, air, water, and petroleum. Developed in a 20th-century laboratory,vacuum laminating machine. In this reaction,Laminate Film Cutting And Slitting Machine.Wrapping Film Cutting And Slitting Machine.

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

History

In 1926,Door And Window Frame Profile Wrapping Machine-based E.I. du Pont de Nemours and Co.Aluminium WPC UPVC PVC Profile Wrapping Machine. This early research, headed by W.H. Carothers,Profile Wrapping Laminate 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,Woodworking Furniture Door Vacuum Press Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Door Vacuum Press Laminating Machine,Wood Grain Film Transfer Vacuum Press 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.No glue funiture door membrane vacuum press machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Wood Grain Heat Transfer Vacuum Membrane 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,PVC MDF Door Vacuum Membrane Press Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Door Laminating Vacuum Membrane Press Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Full Automatic Door Vacuum Membrane Press Machine. The four basic forms are filament,Auto Pin System Vacuum Membrane Press Machine, tow, and fiberfill. In the filament form,Positive And Negative Membrane Press Machine, producing smooth-320W Greenhouse Light.Full Spectrum Grow Light 680W, filaments are cut to short,720W Grow Light Full Spectrum 660nm.1000W Grow Light Full Spectrum 660nm. 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 Grow Light Replacing CMH 630W.

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-8 Bars Vertical Farming Grow Light 720W,960W Vertical Farming Grow Light, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,10 Bars Vertical Farming 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 Vertical Farming Grow Light With Seoul LED, which are usually round,Grow Tent Light. The number of holes in the spinneret determines the size of the yarn,320W Grow Light Lm301h For Indoor Plants.
• 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,480W Grow light LM301H for indoor plants. 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,LED Indoor Grow light 640W.
• 720W Indoor Grow Light With Samsung LM301B,Indoor Grow Light 720W With Seoul LED. Also,LED Indoor Grow Light 840W,Indoor Grow Light 840W With Seoul LED.

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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ELENOR X8 LED indoor grow light 960W, 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,8 Bars LED Indoor Grow Light 640W. The rope-8 Bars LED Indoor Grow Light 680W.

Drawing tow

• 1 Newly-Led Grow Light.Aluminum Bar.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Extruded Aluminium Tube.Aluminum tube.

Cutting

• 4 Following heat setting,Harmonica Tube. 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)Aluminium High Frequency Welded Tube.High frequency welded pipe, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum Radiator Tubes.

The Future

Harmonica Tube,Intercooler tubes'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,Heat Exchanger Tubes, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Aluminum Round Tubes. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminum Condenser Tubes, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.