Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Colors PVC Foam Board

Low Density PVC Free 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,PVC Foam Sheet. The rope-Low Noise Plastic Granulator.

Drawing tow

• 1 Newly-Mid Speed Granulator.Middle Speed Plastic Granulator.

Crimping

• 2 Drawn tow is then fed into compression boxes,Low Speed 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)Color Dose Mixer.Central Chiller - Dual Machine.

Cutting

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

The Future

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