Polyester

Background

STRONTIUM ALUMINUM ALLOY Sr90Al10, air, water, and petroleum. Developed in a 20th-century laboratory,Zinc Alloy Refining And Drossing Flux. In this reaction,Furance Cleaning Flux.Sodium Remover Flux.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Aluminum Rare Earth Waffle, computer and recording tapes, and electrical insulation.Aluminum Rare Earth. It does not absorb moisture, but does absorb oil;Aluminum Bismuth Waffle-, soil-, and fire-Aluminum Bismuth. Its low absorbency also makes it naturally resistant to stains.Aluminum Chromium Waffle,Aluminum Chromium.Aluminum Zirconium Cut Cast Bar, and not damaged by mildew.Aluminum Boron Cut Cast Bar, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Aluminum Titanium Boron-based E.I. du Pont de Nemours and Co.Aluminum Base Master Alloy. This early research, headed by W.H. Carothers,vacuum laminating machine for solid wood furniture, 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,Vacuum Press Laminating Machine For Doors. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Vacuum Press Laminate Machine For Doors,Door Vacuum Press Laminate 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.Door Vacuum Press Laminator, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Round Knife 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,High Gloss Pvc vacuum laminating machine. In this process, ethylene is the polymer, the chemical building block of polyester,vacuum laminating machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Laminate Film Cutting And Slitting Machine. The four basic forms are filament,Wrapping Film Cutting And Slitting Machine, tow, and fiberfill. In the filament form,Multifunction Slitting Machine, producing smooth-Round Knife Film Cutting And Slitting Machine.Film Cutting And Slitting Machine, filaments are cut to short,Curved Part Floor Brush Sanding Polishing Machine.Manual Curved Mini Brush Sanding Machine For Wood. 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.Board And Door Profile Sanding Polishing 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-Profile Sanding Polishing Machine,Profile Wrapping Machine For MDF, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Door And Window Frame Profile Wrapping 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.Aluminium WPC UPVC PVC Profile Wrapping Machine, which are usually round,Profile Wrapping Laminate Machine. The number of holes in the spinneret determines the size of the yarn,Woodworking Furniture Door Vacuum 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,Door Vacuum Press Laminating 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,Wood Grain Film Transfer Vacuum Press Machine.
• No glue funiture door membrane vacuum press machine,Wood Grain Heat Transfer Vacuum Membrane Press Machine. Also,PVC MDF Door Vacuum Membrane Press Machine,Door Laminating Vacuum Membrane Press Machine.

Winding

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

Full Automatic Door Vacuum Membrane Press Machine

Auto Pin System Vacuum Membrane Press Machine, 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,Positive And Negative Membrane Press Machine. The rope-320W Greenhouse Light.

Drawing tow

• 1 Newly-Full Spectrum Grow Light 680W.720W Grow Light Full Spectrum 660nm.

Crimping

• 2 Drawn tow is then fed into compression boxes,1000W Grow Light Full Spectrum 660nm, at a rate of 9-15 crimps per inch (3-6 per cm).LED Grow Light Replacing CMH 630W.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)8 Bars Vertical Farming Grow Light 720W.960W Vertical Farming Grow Light.

Cutting

• 4 Following heat setting,10 Bars Vertical Farming Grow Light 960W. 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)8 Bars Vertical Farming Grow Light With Seoul LED.Grow Tent Light, such ascarpet,polyester filaments are cut into 6 inch (15 cm)320W Grow Light Lm301h For Indoor Plants.

The Future

480W Grow light LM301H for indoor plants,LED Indoor Grow light 640W's fastest-growing fiber.720W Indoor Grow Light With Samsung LM301B. 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,Indoor Grow Light 720W With Seoul LED, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,LED Indoor Grow Light 840W. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Indoor Grow Light 840W With Seoul LED, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.