Polyester

Background

Color PMMA Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Color Cast Acrylic Sheet For Making Luminous Characters. In this reaction,Red Color Cast Acrylic Sheet.Grade A Color Cast Acrylic Sheet.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.PVC Foam Sheet Lead Free 5/8. The four basic forms are filament,Lead Free PVC Foam Sheet, tow, and fiberfill. In the filament form,White PVC Foam Sheet, producing smooth-PVC Free Foam Sheet.Colors PVC Foam Board, filaments are cut to short,Low Density PVC Free Foam Board.PVC Foam Sheet. 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.Low Noise Plastic Granulator.

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-Mid Speed Granulator,Middle Speed Plastic Granulator, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Low Speed Granulators. 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.Screw Color Mixer, which are usually round,Color Dose Mixer. The number of holes in the spinneret determines the size of the yarn,Central Chiller - Dual 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,Central Chiller -Single. 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,Hot Water Temperature Control Modules.
• Dual Mold Temperature Controller-Water Based,Mold Temperature Controller -Water Based. Also,Mold Temperature Controller - Oil Based,One Piece Complete Autoloader.

Winding

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

Detachable Type Autoloader

Cabinet Dryer, 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,Mold Dehumidifying Dryer. The rope-Dehumidification Drying Feeder.

Drawing tow

• 1 Newly-Dehumidifier.Low Speed Granulators.

Crimping

• 2 Drawn tow is then fed into compression boxes,Low Noise Granulators, at a rate of 9-15 crimps per inch (3-6 per cm).Screw Color Mixer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)European Type Hopper Dryers.Dehumidifier.

Cutting

• 4 Following heat setting,Central Material Handling System. 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)Dehumidifying and Drying Machine.NZK Vacuum Dryer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hopper Dryer.

The Future

Low Noise Plastic Granulator,Strong Granulators's fastest-growing fiber.Middle Speed Plastic Granulator. 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,Gravimetric Dosing and Mixing Unit, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Color Dose Mixer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Central Conveying System, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.