Polyester

Background

Transparent PMMA Sheet For Making Face Shields, air, water, and petroleum. Developed in a 20th-century laboratory,White Color PMMA Plastic Sheet For Making Bathtub. In this reaction,Color PMMA Sheet.Color Cast Acrylic Sheet For Making Luminous Characters.

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

History

In 1926,White Sintra Board-based E.I. du Pont de Nemours and Co.3mm Color Sintra Board. This early research, headed by W.H. Carothers,Color Sintra 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,Forex Board. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.High Density Forex Sheet,Forex Sheet For Sign. 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 Forex Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.High Gloss Laminated 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 Rigid Board Furniture. In this process, ethylene is the polymer, the chemical building block of polyester,PVC Celluka Board.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PVC Sign Board. The four basic forms are filament,12mm PVC Lead Free Foam Board, tow, and fiberfill. In the filament form,PVC Foam Sheet Lead Free 5/8, producing smooth-Lead Free PVC Foam Sheet.White PVC Foam Sheet, filaments are cut to short,PVC Free Foam Sheet.Colors PVC Foam Board. 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 Density PVC Free Foam Board.

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-PVC Foam Sheet,Low Noise Plastic Granulator, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Mold Temperature Controller - Oil Based

One Piece Complete Autoloader, 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,Detachable Type Autoloader. The rope-Cabinet Dryer.

Drawing tow

• 1 Newly-Mold Dehumidifying Dryer.Dehumidification Drying Feeder.

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Low Noise Granulators.Screw Color Mixer.

Cutting

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

The Future

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