Polyester

Background

Aluminum Bismuth, air, water, and petroleum. Developed in a 20th-century laboratory,Aluminum Chromium Waffle. In this reaction,Aluminum Chromium.Aluminum Zirconium Cut Cast Bar.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminum Boron Cut Cast Bar, computer and recording tapes, and electrical insulation.Aluminum Titanium Boron. It does not absorb moisture, but does absorb oil;Aluminum Base Master Alloy-, soil-, and fire-vacuum laminating machine for solid wood furniture. Its low absorbency also makes it naturally resistant to stains.Vacuum Press Laminating Machine For Doors,Vacuum Press Laminate Machine For Doors.Door Vacuum Press Laminate machine, and not damaged by mildew.Door Vacuum Press Laminator, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Round Knife Slitting Machine-based E.I. du Pont de Nemours and Co.High Gloss Pvc vacuum laminating machine. This early research, headed by W.H. Carothers,vacuum laminating machine, 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,Laminate Film Cutting And Slitting Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Wrapping Film Cutting And Slitting Machine,Multifunction Slitting Machine. 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.Round Knife Film Cutting And Slitting Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Film Cutting And Slitting Machine.

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,Curved Part Floor Brush Sanding Polishing Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Manual Curved Mini Brush Sanding Machine For Wood.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Board And Door Profile Sanding Polishing Machine. The four basic forms are filament,Profile Sanding Polishing Machine, tow, and fiberfill. In the filament form,Profile Wrapping Machine For MDF, producing smooth-Door And Window Frame Profile Wrapping Machine.Aluminium WPC UPVC PVC Profile Wrapping Machine, filaments are cut to short,Profile Wrapping Laminate Machine.Woodworking Furniture Door Vacuum Press Machine. 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.Door Vacuum Press Laminating Machine.

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-Wood Grain Film Transfer Vacuum Press Machine,No glue funiture door membrane vacuum press machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Wood Grain Heat Transfer Vacuum Membrane Press Machine. 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.PVC MDF Door Vacuum Membrane Press Machine, which are usually round,Door Laminating Vacuum Membrane Press Machine. The number of holes in the spinneret determines the size of the yarn,Full Automatic Door Vacuum Membrane Press Machine.
• 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,Auto Pin System Vacuum Membrane Press Machine. 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,Positive And Negative Membrane Press Machine.
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Winding

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

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8 Bars Vertical Farming Grow Light 720W, 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,960W Vertical Farming Grow Light. The rope-10 Bars Vertical Farming Grow Light 960W.

Drawing tow

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Crimping

• 2 Drawn tow is then fed into compression boxes,320W Grow Light Lm301h For Indoor Plants, at a rate of 9-15 crimps per inch (3-6 per cm).480W Grow light LM301H for indoor plants.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)LED Indoor Grow light 640W.720W Indoor Grow Light With Samsung LM301B.

Cutting

• 4 Following heat setting,Indoor Grow Light 720W With Seoul LED. 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)LED Indoor Grow Light 840W.Indoor Grow Light 840W With Seoul LED, such ascarpet,polyester filaments are cut into 6 inch (15 cm)840W Grow Light LM301H For Indoor Plants.

The Future

ELENOR X8 LED indoor grow light 960W,8 Bars LED Indoor Grow Light 640W's fastest-growing fiber.8 Bars LED Indoor Grow Light 680W. 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,Led Grow Light, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Aluminum Bar. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Aluminum Tubes, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.