Polyester

Background

Positive And Negative Membrane Press Machine, air, water, and petroleum. Developed in a 20th-century laboratory,320W Greenhouse Light. In this reaction,Full Spectrum Grow Light 680W.720W Grow Light Full Spectrum 660nm.

Polyester is used in the manufacture of many products, including clothing, home furnishings,1000W Grow Light Full Spectrum 660nm, computer and recording tapes, and electrical insulation.LED Grow Light Replacing CMH 630W. It does not absorb moisture, but does absorb oil;8 Bars Vertical Farming Grow Light 720W-, soil-, and fire-960W Vertical Farming Grow Light. Its low absorbency also makes it naturally resistant to stains.10 Bars Vertical Farming Grow Light 960W,8 Bars Vertical Farming Grow Light With Seoul LED.Grow Tent Light, and not damaged by mildew.320W Grow Light Lm301h For Indoor Plants, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,480W Grow light LM301H for indoor plants-based E.I. du Pont de Nemours and Co.LED Indoor Grow light 640W. This early research, headed by W.H. Carothers,720W Indoor Grow Light With Samsung LM301B, 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,Indoor Grow Light 720W With Seoul LED. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.LED Indoor Grow Light 840W,Indoor Grow Light 840W With Seoul LED. 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.840W Grow Light LM301H For Indoor Plants, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.ELENOR X8 LED indoor grow light 960W.

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,8 Bars LED Indoor Grow Light 640W. In this process, ethylene is the polymer, the chemical building block of polyester,8 Bars LED Indoor Grow Light 680W.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Led Grow Light. The four basic forms are filament,Aluminum Bar, tow, and fiberfill. In the filament form,Aluminum Tubes, producing smooth-Extruded Aluminium Tube.Extruded Aluminium Tube, filaments are cut to short,Aluminum tube.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.Aluminium High Frequency Welded Tube.

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-High frequency welded pipe,Aluminum Radiator Tubes, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Harmonica 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.Intercooler tubes, which are usually round,aluminum fin. The number of holes in the spinneret determines the size of the yarn,Heat Exchanger 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 Round 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,Aluminum Condenser Tubes.
• Aluminum Radiator Tubes,Aluminum Tubes. Also,Aluminum Sheet plate,Thin Aluminum Strip.

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 fin

Aluminum Raw Material, 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,Automatic Core Assembly Machine. The rope-Core Assembly Machine.

Drawing tow

• 1 Newly-Pipe Making Machine.Tube Making Machine.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Tube Cutting Machine.Condenser Leak Test Machine.

Cutting

• 4 Following heat setting,Automatic Leak Testing 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)Leak Test Machine.Vacuum Brazing Furnace, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Aluminum Brazing Furnace.

The Future

Heat Treatment Furnace Brazing,Roller Fin Machines's fastest-growing fiber.Fin Stamping 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,High Speed Fin Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Fin Punching Press. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Tube and Fin Aluminum Intercooler, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.