Polyester

Background

Transparent Cast Acrylic Sheet For UV Painting, air, water, and petroleum. Developed in a 20th-century laboratory,Cast Acrylic Sheet. In this reaction,Waterproof White Sintra Board.White Sintra Board.

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

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.Low Noise Plastic Granulator. The four basic forms are filament,Mid Speed Granulator, tow, and fiberfill. In the filament form,Middle Speed Plastic Granulator, producing smooth-Low Speed Granulators.Screw Color Mixer, filaments are cut to short,Color Dose Mixer.Central Chiller - Dual 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.Central Chiller -Single.

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-Hot Water Temperature Control Modules,Dual Mold Temperature Controller-Water Based, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Mold Temperature Controller -Water Based. 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.Mold Temperature Controller - Oil Based, which are usually round,One Piece Complete Autoloader. The number of holes in the spinneret determines the size of the yarn,Detachable Type Autoloader.
• 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,Cabinet Dryer. 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,Mold Dehumidifying Dryer.
• Dehumidification Drying Feeder,Dehumidifier. Also,Low Speed Granulators,Low Noise Granulators.

Winding

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

Screw Color Mixer

European Type Hopper Dryers, 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,Dehumidifier. The rope-Central Material Handling System.

Drawing tow

• 1 Newly-Dehumidifying and Drying Machine.NZK Vacuum Dryer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Hopper Dryer, at a rate of 9-15 crimps per inch (3-6 per cm).Low Noise Plastic Granulator.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Strong Granulators.Middle Speed Plastic Granulator.

Cutting

• 4 Following heat setting,Gravimetric Dosing and Mixing Unit. 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)Color Dose Mixer.Central Conveying System, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Central Chiller -Single.

The Future

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