Polyester

Background

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

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

History

In 1926,1000W Grow Light Full Spectrum 660nm-based E.I. du Pont de Nemours and Co.LED Grow Light Replacing CMH 630W. This early research, headed by W.H. Carothers,8 Bars Vertical Farming Grow Light 720W, 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 1946,960W Vertical Farming Grow Light. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.10 Bars Vertical Farming Grow Light 960W,8 Bars Vertical Farming Grow Light 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.Grow Tent Light, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.320W 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,480W Grow light LM301H for indoor plants. In this process, ethylene is the polymer, the chemical building block of polyester,LED Indoor Grow light 640W.

The Manufacturing
Process

Polyester is manufactured by one of several methods.720W Indoor Grow Light With Samsung LM301B. The four basic forms are filament,Indoor Grow Light 720W With Seoul LED, tow, and fiberfill. In the filament form,LED Indoor Grow Light 840W, producing smooth-Indoor Grow Light 840W With Seoul LED.840W Grow Light LM301H For Indoor Plants, filaments are cut to short,ELENOR X8 LED indoor grow light 960W.8 Bars LED Indoor Grow Light 640W. 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.8 Bars LED Indoor Grow Light 680W.

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-Led Grow Light,Aluminum Bar, is extruded through a slot to form long ribbons.

Drying

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

Heat Exchanger 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 Round Tubes. The rope-Aluminum Condenser Tubes.

Drawing tow

• 1 Newly-Aluminum Radiator Tubes.Aluminum Tubes.

Crimping

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

Setting

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

Cutting

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

The Future

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