Polyester

Background

Color Cast Acrylic Sheet For Making Luminous Characters, air, water, and petroleum. Developed in a 20th-century laboratory,Red Color Cast Acrylic Sheet. In this reaction,Grade A Color Cast Acrylic Sheet.Color Cast Acrylic Sheet.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Transparent Cast Acrylic Sheet Used For Building Materials, computer and recording tapes, and electrical insulation.Frosted Transparent Cast Acrylic Sheet. It does not absorb moisture, but does absorb oil;Transparent Cast Acrylic Sheet For UV Painting-, soil-, and fire-Cast Acrylic Sheet. Its low absorbency also makes it naturally resistant to stains.Waterproof White Sintra Board,White Sintra Board.3mm Color Sintra Board, and not damaged by mildew.Color Sintra Board, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Forex Board-based E.I. du Pont de Nemours and Co.High Density Forex Sheet. This early research, headed by W.H. Carothers,Forex Sheet For Sign, 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,PVC Forex Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.High Gloss Laminated Board,PVC Rigid Board Furniture. 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.PVC Celluka Board, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PVC Sign 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,12mm PVC Lead Free Foam Board. In this process, ethylene is the polymer, the chemical building block of polyester,PVC Foam Sheet Lead Free 5/8.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Lead Free PVC Foam Sheet. The four basic forms are filament,White PVC Foam Sheet, tow, and fiberfill. In the filament form,PVC Free Foam Sheet, producing smooth-Colors PVC Foam Board.Low Density PVC Free Foam Board, filaments are cut to short,PVC Foam Sheet.Low Noise Plastic Granulator. 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.Mid Speed Granulator.

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-Middle Speed Plastic Granulator,Low Speed Granulators, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Screw Color Mixer. 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.Color Dose Mixer, which are usually round,Central Chiller - Dual Machine. The number of holes in the spinneret determines the size of the yarn,Central Chiller -Single.
• 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,Hot Water Temperature Control Modules. 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,Dual Mold Temperature Controller-Water Based.
• Mold Temperature Controller -Water Based,Mold Temperature Controller - Oil Based. Also,One Piece Complete Autoloader,Detachable Type Autoloader.

Winding

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

Cabinet Dryer

Mold Dehumidifying Dryer, 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,Dehumidification Drying Feeder. The rope-Dehumidifier.

Drawing tow

• 1 Newly-Low Speed Granulators.Low Noise Granulators.

Crimping

• 2 Drawn tow is then fed into compression boxes,Screw Color Mixer, at a rate of 9-15 crimps per inch (3-6 per cm).European Type Hopper Dryers.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Dehumidifier.Central Material Handling System.

Cutting

• 4 Following heat setting,Dehumidifying and Drying 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)NZK Vacuum Dryer.Hopper Dryer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Low Noise Plastic Granulator.

The Future

Strong Granulators,Middle Speed Plastic Granulator's fastest-growing fiber.Gravimetric Dosing and Mixing Unit. 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,Color Dose Mixer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Central Conveying System. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Central Chiller -Single, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.