Polyester

Background

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

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

History

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

The Manufacturing
Process

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

Drying

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

Winding

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

Hot Water Temperature Control Modules

Dual 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 -Water Based. The rope-Mold Temperature Controller - Oil Based.

Drawing tow

• 1 Newly-One Piece Complete Autoloader.Detachable Type Autoloader.

Crimping

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

Setting

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

Cutting

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

The Future

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