Polyester

Background

Wood Grain Film Transfer Vacuum Press Machine, air, water, and petroleum. Developed in a 20th-century laboratory,No glue funiture door membrane vacuum press machine. In this reaction,Wood Grain Heat Transfer Vacuum Membrane Press Machine.PVC MDF Door Vacuum Membrane Press Machine.

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

History

In 1926,LED Grow Light Replacing CMH 630W-based E.I. du Pont de Nemours and Co.8 Bars Vertical Farming Grow Light 720W. This early research, headed by W.H. Carothers,960W Vertical Farming Grow Light, 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 1946,10 Bars Vertical Farming Grow Light 960W. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.8 Bars Vertical Farming Grow Light With Seoul LED,Grow Tent Light. 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.320W 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.480W Grow light LM301H for indoor plants.

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,LED Indoor Grow light 640W. In this process, ethylene is the polymer, the chemical building block of polyester,720W Indoor Grow Light With Samsung LM301B.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Indoor Grow Light 720W With Seoul LED. The four basic forms are filament,LED Indoor Grow Light 840W, tow, and fiberfill. In the filament form,Indoor Grow Light 840W With Seoul LED, producing smooth-840W Grow Light LM301H For Indoor Plants.ELENOR X8 LED indoor grow light 960W, filaments are cut to short,8 Bars LED Indoor Grow Light 640W.8 Bars LED Indoor Grow Light 680W. 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.

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 Bar,Aluminum Tubes, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Heat Exchanger Tubes

Aluminum Round 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 Condenser Tubes. The rope-Aluminum Radiator Tubes.

Drawing tow

• 1 Newly-Aluminum Tubes.Aluminum Sheet plate.

Crimping

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

Setting

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

Cutting

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

The Future

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