Polyester

Background

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

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

History

In 1926,8 Bars Vertical Farming Grow Light 720W-based E.I. du Pont de Nemours and Co.960W Vertical Farming Grow Light. This early research, headed by W.H. Carothers,10 Bars Vertical Farming Grow Light 960W, 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 1946,8 Bars Vertical Farming Grow Light With Seoul LED. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Grow Tent Light,320W Grow Light Lm301h For Indoor Plants. 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.480W 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.LED Indoor Grow light 640W.

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

The Manufacturing
Process

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

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

Aluminum Condenser 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 Radiator Tubes. The rope-Aluminum Tubes.

Drawing tow

• 1 Newly-Aluminum Sheet plate.Thin Aluminum Strip.

Crimping

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

Setting

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

Cutting

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

The Future

Tube Cutting Machine,Condenser Leak Test Machine's fastest-growing fiber.Automatic Leak Testing 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,Leak Test Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Vacuum Brazing Furnace. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminum 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.