Polyester

Background

Wood Grain Heat Transfer Vacuum Membrane Press Machine, air, water, and petroleum. Developed in a 20th-century laboratory,PVC MDF Door Vacuum Membrane Press Machine. In this reaction,Door Laminating Vacuum Membrane Press Machine.Full Automatic Door Vacuum Membrane Press Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Auto Pin System Vacuum Membrane Press Machine, computer and recording tapes, and electrical insulation.Positive And Negative Membrane Press Machine. It does not absorb moisture, but does absorb oil;320W Greenhouse Light-, soil-, and fire-Full Spectrum Grow Light 680W. Its low absorbency also makes it naturally resistant to stains.720W Grow Light Full Spectrum 660nm,1000W Grow Light Full Spectrum 660nm.LED Grow Light Replacing CMH 630W, and not damaged by mildew.8 Bars Vertical Farming Grow Light 720W, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,960W Vertical Farming Grow Light-based E.I. du Pont de Nemours and Co.10 Bars Vertical Farming Grow Light 960W. This early research, headed by W.H. Carothers,8 Bars Vertical Farming Grow Light With Seoul LED, 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,Grow Tent Light. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.320W Grow Light Lm301h For Indoor Plants,480W Grow light LM301H for indoor plants. 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 Indoor Grow light 640W, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.720W Indoor Grow Light With Samsung LM301B.

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,Indoor Grow Light 720W With Seoul LED. In this process, ethylene is the polymer, the chemical building block of polyester,LED Indoor Grow Light 840W.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Indoor Grow Light 840W With Seoul LED. The four basic forms are filament,840W Grow Light LM301H For Indoor Plants, tow, and fiberfill. In the filament form,ELENOR X8 LED indoor grow light 960W, producing smooth-8 Bars LED Indoor Grow Light 640W.8 Bars LED Indoor Grow Light 680W, filaments are cut to short,Led Grow Light.Aluminum Bar. 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.Aluminum Tubes.

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-Extruded Aluminium Tube,Extruded Aluminium Tube, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum tube. 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.Harmonica Tube, which are usually round,Aluminium High Frequency Welded Tube. The number of holes in the spinneret determines the size of the yarn,High frequency welded pipe.
• 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 Radiator Tubes. 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,Harmonica Tube.
• Intercooler tubes,aluminum fin. Also,Heat Exchanger Tubes,Aluminum Round Tubes.

Winding

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

Aluminum Condenser Tubes

Aluminum Radiator Tubes, 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 Tubes. The rope-Aluminum Sheet plate.

Drawing tow

• 1 Newly-Thin Aluminum Strip.Aluminum fin.

Crimping

• 2 Drawn tow is then fed into compression boxes,Aluminum Raw Material, at a rate of 9-15 crimps per inch (3-6 per cm).Automatic Core Assembly Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Core Assembly Machine.Pipe Making Machine.

Cutting

• 4 Following heat setting,Tube Making Machine. 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)Radiator Tube Making Machine.Tube Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Tube Cutting Machine.

The Future

Condenser Leak Test Machine,Automatic Leak Testing Machine's fastest-growing fiber.Leak Test 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,Vacuum Brazing Furnace, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Aluminum Brazing Furnace. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Heat Treatment Furnace Brazing, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.