Polyester

Background

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

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

History

In 1926,Cast Acrylic Sheet-based E.I. du Pont de Nemours and Co.Waterproof White Sintra Board. This early research, headed by W.H. Carothers,White 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 1946,3mm Color Sintra Board. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Color Sintra Board,Forex 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.High Density Forex Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Forex Sheet For Sign.

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 Forex Sheet. In this process, ethylene is the polymer, the chemical building block of polyester,High Gloss Laminated Board.

The Manufacturing
Process

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

Drying

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

Winding

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

Dual Mold Temperature Controller-Water Based

Mold Temperature Controller -Water Based, 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 Temperature Controller - Oil Based. The rope-One Piece Complete Autoloader.

Drawing tow

• 1 Newly-Detachable Type Autoloader.Cabinet Dryer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Mold Dehumidifying Dryer, at a rate of 9-15 crimps per inch (3-6 per cm).Dehumidification Drying Feeder.

Setting

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

Cutting

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

The Future

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