Polyester

Background

PVC MDF Door Vacuum Membrane Press Machine, air, water, and petroleum. Developed in a 20th-century laboratory,Door Laminating Vacuum Membrane Press Machine. In this reaction,Full Automatic Door Vacuum Membrane Press Machine.Auto Pin System Vacuum Membrane Press Machine.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Positive And Negative Membrane Press Machine, computer and recording tapes, and electrical insulation.320W Greenhouse Light. It does not absorb moisture, but does absorb oil;Full Spectrum Grow Light 680W-, soil-, and fire-720W Grow Light Full Spectrum 660nm. Its low absorbency also makes it naturally resistant to stains.1000W Grow Light Full Spectrum 660nm,LED Grow Light Replacing CMH 630W.8 Bars Vertical Farming Grow Light 720W, and not damaged by mildew.960W Vertical Farming Grow Light, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,10 Bars Vertical Farming Grow Light 960W-based E.I. du Pont de Nemours and Co.8 Bars Vertical Farming Grow Light With Seoul LED. This early research, headed by W.H. Carothers,Grow Tent 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 1946,320W Grow Light Lm301h For Indoor Plants. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.480W Grow light LM301H for indoor plants,LED Indoor Grow light 640W. 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.720W Indoor Grow Light With Samsung LM301B, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Indoor Grow Light 720W With Seoul LED.

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.840W Grow Light LM301H For Indoor Plants. The four basic forms are filament,ELENOR X8 LED indoor grow light 960W, tow, and fiberfill. In the filament form,8 Bars LED Indoor Grow Light 640W, producing smooth-8 Bars LED Indoor Grow Light 680W.Led Grow Light, filaments are cut to short,Aluminum Bar.Aluminum Tubes. 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.Extruded Aluminium 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-Extruded Aluminium Tube,Aluminum tube, 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.Aluminium High Frequency Welded Tube, which are usually round,High frequency welded pipe. The number of holes in the spinneret determines the size of the yarn,Aluminum Radiator 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,Harmonica 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,Intercooler tubes.
• aluminum fin,Heat Exchanger Tubes. Also,Aluminum Round Tubes,Aluminum Condenser 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 Radiator Tubes

Aluminum 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 Sheet plate. The rope-Thin Aluminum Strip.

Drawing tow

• 1 Newly-Aluminum fin.Aluminum Raw Material.

Crimping

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

Setting

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

Cutting

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

The Future

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