Polyester

Background

Rubber Bumpers, air, water, and petroleum. Developed in a 20th-century laboratory,Square Rubber Grommets. In this reaction,Custom Molded Rubber Parts.Compression Molding Custom Rubber Parts.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Extrusion Molding Custom Rubber Parts, computer and recording tapes, and electrical insulation.Custom Neoprene Rubber Products. It does not absorb moisture, but does absorb oil;Custom Rubber Parts Anti-Slip Handle Grip-, soil-, and fire-EPDM Rubber Sheets. Its low absorbency also makes it naturally resistant to stains.Rubber Parts,Custom Rubber Parts.Color Plexiglass Sheet For Making Furnitures, and not damaged by mildew.Transparent Plexiglass Sheet For LED Display, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Plexiglass Sheet-based E.I. du Pont de Nemours and Co.Pure Raw Materials Color Extruded Acrylic Sheet. This early research, headed by W.H. Carothers,Extruded 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,Transparent PMMA Sheet For Making Face Shields. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.White Color PMMA Plastic Sheet For Making Bathtub,Color PMMA 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.Color Cast Acrylic Sheet For Making Luminous Characters, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Red Color Cast Acrylic 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,Grade A Color Cast Acrylic Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,Color Cast Acrylic Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Transparent Cast Acrylic Sheet Used For Building Materials. The four basic forms are filament,Frosted Transparent Cast Acrylic Sheet, tow, and fiberfill. In the filament form,Transparent Cast Acrylic Sheet For UV Painting, producing smooth-Cast Acrylic Sheet.Waterproof White Sintra Board, filaments are cut to short,White Sintra Board.3mm Color Sintra 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.Color Sintra 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-Forex Board,High Density Forex Sheet, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Forex Sheet For Sign. 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.PVC Forex Sheet, which are usually round,High Gloss Laminated Board. The number of holes in the spinneret determines the size of the yarn,PVC Rigid Board Furniture.
• 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,PVC Celluka Board. 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,PVC Sign Board.
• 12mm PVC Lead Free Foam Board,PVC Foam Sheet Lead Free 5/8. Also,Lead Free PVC Foam Sheet,White PVC Foam Sheet.

Winding

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

PVC Free Foam Sheet

Colors PVC Foam Board, 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 Density PVC Free Foam Board. The rope-PVC Foam Sheet.

Drawing tow

• 1 Newly-Low Noise Plastic Granulator.Mid Speed Granulator.

Crimping

• 2 Drawn tow is then fed into compression boxes,Middle Speed Plastic Granulator, 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)Screw Color Mixer.Color Dose Mixer.

Cutting

• 4 Following heat setting,Central Chiller - Dual Machine. 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)Central Chiller -Single.Hot Water Temperature Control Modules, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Dual Mold Temperature Controller-Water Based.

The Future

Mold Temperature Controller -Water Based,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.