Polyester

Background

LED Indoor Grow Light 840W, air, water, and petroleum. Developed in a 20th-century laboratory,Indoor Grow Light 840W With Seoul LED. In this reaction,840W Grow Light LM301H For Indoor Plants.ELENOR X8 LED indoor grow light 960W.

Polyester is used in the manufacture of many products, including clothing, home furnishings,8 Bars LED Indoor Grow Light 640W, computer and recording tapes, and electrical insulation.8 Bars LED Indoor Grow Light 680W. It does not absorb moisture, but does absorb oil;Led Grow Light-, soil-, and fire-Aluminum Bar. Its low absorbency also makes it naturally resistant to stains.Aluminum Tubes,Extruded Aluminium Tube.Extruded Aluminium Tube, and not damaged by mildew.Aluminum tube, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Harmonica Tube-based E.I. du Pont de Nemours and Co.Aluminium High Frequency Welded Tube. This early research, headed by W.H. Carothers,High frequency welded pipe, 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,Aluminum Radiator Tubes. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Harmonica Tube,Intercooler tubes. 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.aluminum fin, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Heat Exchanger Tubes.

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,Aluminum Round Tubes. In this process, ethylene is the polymer, the chemical building block of polyester,Aluminum Condenser Tubes.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Aluminum Radiator Tubes. The four basic forms are filament,Aluminum Tubes, tow, and fiberfill. In the filament form,Aluminum Sheet plate, producing smooth-Thin Aluminum Strip.Aluminum fin, filaments are cut to short,Aluminum Raw Material.Automatic Core Assembly 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.Core Assembly Machine.

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-Pipe Making Machine,Tube Making Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Radiator Tube Making Machine. 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.Tube Machine, which are usually round,Tube Cutting Machine. The number of holes in the spinneret determines the size of the yarn,Condenser Leak Test Machine.
• 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,Automatic Leak Testing Machine. 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,Leak Test Machine.
• Vacuum Brazing Furnace,Aluminum Brazing Furnace. Also,Heat Treatment Furnace Brazing,Roller Fin Machines.

Winding

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

Fin Stamping Machine

High Speed Fin Machine, 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,Fin Punching Press. The rope-Tube and Fin Aluminum Intercooler.

Drawing tow

• 1 Newly-Aluminum Intercooler Core.Aluminum Bar and Plate Intercooler.

Crimping

• 2 Drawn tow is then fed into compression boxes,Turbo Intercooler, at a rate of 9-15 crimps per inch (3-6 per cm).Radiators with Plastic Tank.

Setting

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

Cutting

• 4 Following heat setting,Cooling System. 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)Cladded Aluminum Radiator Tube.Aluminum Welded Tube, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Radiator aluminum flat tube.

The Future

Aluminum radiator tube,Aluminum intercooler rectangular tube's fastest-growing fiber.Intercooler rectangular tube. 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,Composite Aluminium Tube, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Harmonica Intercooler Tube. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminium Multi channel Tube, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.