Polyester

Background

Color Cast Acrylic Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Transparent Cast Acrylic Sheet Used For Building Materials. In this reaction,Frosted Transparent Cast Acrylic Sheet.Transparent Cast Acrylic Sheet For UV Painting.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Cast Acrylic Sheet, computer and recording tapes, and electrical insulation.Waterproof White Sintra Board. It does not absorb moisture, but does absorb oil;White Sintra Board-, soil-, and fire-3mm Color Sintra Board. Its low absorbency also makes it naturally resistant to stains.Color Sintra Board,Forex Board.High Density Forex Sheet, and not damaged by mildew.Forex Sheet For Sign, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PVC Forex Sheet-based E.I. du Pont de Nemours and Co.High Gloss Laminated Board. This early research, headed by W.H. Carothers,PVC Rigid Board 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,PVC Celluka Board. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PVC Sign Board,12mm PVC Lead Free Foam Board. 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.PVC Foam Sheet Lead Free 5/8, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Lead Free PVC Foam Sheet.

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,White PVC Foam Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,PVC Free Foam Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Colors PVC Foam Board. The four basic forms are filament,Low Density PVC Free Foam Board, tow, and fiberfill. In the filament form,PVC Foam Sheet, producing smooth-Low Noise Plastic Granulator.Mid Speed Granulator, filaments are cut to short,Middle Speed Plastic Granulator.Low Speed Granulators. 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.Screw Color Mixer.

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-Color Dose Mixer,Central Chiller - Dual Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Central Chiller -Single. 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.Hot Water Temperature Control Modules, which are usually round,Dual Mold Temperature Controller-Water Based. The number of holes in the spinneret determines the size of the yarn,Mold Temperature Controller -Water Based.
• 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,Mold Temperature Controller - Oil Based. 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,One Piece Complete Autoloader.
• Detachable Type Autoloader,Cabinet Dryer. Also,Mold Dehumidifying Dryer,Dehumidification Drying Feeder.

Winding

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

Dehumidifier

Low Speed Granulators, 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,Low Noise Granulators. The rope-Screw Color Mixer.

Drawing tow

• 1 Newly-European Type Hopper Dryers.Dehumidifier.

Crimping

• 2 Drawn tow is then fed into compression boxes,Central Material Handling System, at a rate of 9-15 crimps per inch (3-6 per cm).Dehumidifying and Drying Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)NZK Vacuum Dryer.Hopper Dryer.

Cutting

• 4 Following heat setting,Low Noise Plastic Granulator. 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)Strong Granulators.Middle Speed Plastic Granulator, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Gravimetric Dosing and Mixing Unit.

The Future

Color Dose Mixer,Central Conveying System's fastest-growing fiber.Central Chiller -Single. 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,Water Cooled Chillers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Dual Mold Temperature Controller- Oil Based. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.One Piece Complete Autoloader, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.