Polyester

Background

Transparent Plexiglass Sheet For LED Display, air, water, and petroleum. Developed in a 20th-century laboratory,Plexiglass Sheet. In this reaction,Pure Raw Materials Color Extruded Acrylic Sheet.Extruded Acrylic Sheet.

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

History

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

The Manufacturing
Process

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

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-White PVC Foam Sheet,PVC Free Foam Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Colors PVC Foam Board. 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.Low Density PVC Free Foam Board, which are usually round,PVC Foam Sheet. The number of holes in the spinneret determines the size of the yarn,Low Noise Plastic Granulator.
• 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,Mid Speed Granulator. 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,Middle Speed Plastic Granulator.
• Low Speed Granulators,Screw Color Mixer. Also,Color Dose Mixer,Central Chiller - Dual 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.

Central Chiller -Single

Hot Water Temperature Control Modules, 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,Dual Mold Temperature Controller-Water Based. The rope-Mold Temperature Controller -Water Based.

Drawing tow

• 1 Newly-Mold Temperature Controller - Oil Based.One Piece Complete Autoloader.

Crimping

• 2 Drawn tow is then fed into compression boxes,Detachable Type Autoloader, at a rate of 9-15 crimps per inch (3-6 per cm).Cabinet Dryer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Mold Dehumidifying Dryer.Dehumidification Drying Feeder.

Cutting

• 4 Following heat setting,Dehumidifier. 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)Low Speed Granulators.Low Noise Granulators, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Screw Color Mixer.

The Future

European Type Hopper Dryers,Dehumidifier's fastest-growing fiber.Central Material Handling System. 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,Dehumidifying and Drying Machine, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,NZK Vacuum Dryer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Hopper Dryer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.