Polyester

Background

1000W Grow Light Full Spectrum 660nm, air, water, and petroleum. Developed in a 20th-century laboratory,LED Grow Light Replacing CMH 630W. In this reaction,8 Bars Vertical Farming Grow Light 720W.960W Vertical Farming Grow Light.

Polyester is used in the manufacture of many products, including clothing, home furnishings,10 Bars Vertical Farming Grow Light 960W, computer and recording tapes, and electrical insulation.8 Bars Vertical Farming Grow Light With Seoul LED. It does not absorb moisture, but does absorb oil;Grow Tent Light-, soil-, and fire-320W Grow Light Lm301h For Indoor Plants. Its low absorbency also makes it naturally resistant to stains.480W Grow light LM301H for indoor plants,LED Indoor Grow light 640W.720W Indoor Grow Light With Samsung LM301B, and not damaged by mildew.Indoor Grow Light 720W With Seoul LED, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,LED Indoor Grow Light 840W-based E.I. du Pont de Nemours and Co.Indoor Grow Light 840W With Seoul LED. This early research, headed by W.H. Carothers,840W Grow Light LM301H For Indoor Plants, 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,ELENOR X8 LED indoor grow light 960W. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.8 Bars LED Indoor Grow Light 640W,8 Bars LED Indoor Grow Light 680W. 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 Grow Light, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Aluminum Bar.

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 Tubes. In this process, ethylene is the polymer, the chemical building block of polyester,Extruded Aluminium Tube.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Extruded Aluminium Tube. The four basic forms are filament,Aluminum tube, tow, and fiberfill. In the filament form,Harmonica Tube, producing smooth-Aluminium High Frequency Welded Tube.High frequency welded pipe, filaments are cut to short,Aluminum Radiator Tubes.Harmonica Tube. 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.Intercooler 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-aluminum fin,Heat Exchanger Tubes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Aluminum Round Tubes. 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.Aluminum Condenser Tubes, which are usually round,Aluminum Radiator Tubes. The number of holes in the spinneret determines the size of the yarn,Aluminum Tubes.
• 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 Sheet plate. 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,Thin Aluminum Strip.
• Aluminum fin,Aluminum Raw Material. Also,Automatic Core Assembly Machine,Core Assembly Machine.

Winding

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

Pipe Making Machine

Tube Making 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,Radiator Tube Making Machine. The rope-Tube Machine.

Drawing tow

• 1 Newly-Tube Cutting Machine.Condenser Leak Test Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Automatic Leak Testing Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Leak Test Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Vacuum Brazing Furnace.Aluminum Brazing Furnace.

Cutting

• 4 Following heat setting,Heat Treatment Furnace Brazing. 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)Roller Fin Machines.Fin Stamping Machine, such ascarpet,polyester filaments are cut into 6 inch (15 cm)High Speed Fin Machine.

The Future

Fin Punching Press,Tube and Fin Aluminum Intercooler's fastest-growing fiber.Aluminum Intercooler Core. 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 Bar and Plate Intercooler, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Turbo Intercooler. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Radiators with Plastic Tank, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.