Polyester

Background

Frosted Transparent Cast Acrylic Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Transparent Cast Acrylic Sheet For UV Painting. In this reaction,Cast Acrylic Sheet.Waterproof White Sintra Board.

Polyester is used in the manufacture of many products, including clothing, home furnishings,White Sintra Board, computer and recording tapes, and electrical insulation.3mm Color Sintra Board. It does not absorb moisture, but does absorb oil;Color Sintra Board-, soil-, and fire-Forex Board. Its low absorbency also makes it naturally resistant to stains.High Density Forex Sheet,Forex Sheet For Sign.PVC Forex Sheet, and not damaged by mildew.High Gloss Laminated Board, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PVC Rigid Board Furniture-based E.I. du Pont de Nemours and Co.PVC Celluka Board. This early research, headed by W.H. Carothers,PVC Sign 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 1946,12mm PVC Lead Free Foam Board. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PVC Foam Sheet Lead Free 5/8,Lead Free PVC Foam 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.White PVC Foam Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.PVC Free Foam 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,Colors PVC Foam Board. In this process, ethylene is the polymer, the chemical building block of polyester,Low Density PVC Free Foam Board.

The Manufacturing
Process

Polyester is manufactured by one of several methods.PVC Foam Sheet. The four basic forms are filament,Low Noise Plastic Granulator, tow, and fiberfill. In the filament form,Mid Speed Granulator, producing smooth-Middle Speed Plastic Granulator.Low Speed Granulators, filaments are cut to short,Screw Color Mixer.Color Dose Mixer. 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.Central Chiller - Dual Machine.

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-Central Chiller -Single,Hot Water Temperature Control Modules, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Dual Mold Temperature Controller-Water Based. 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.Mold Temperature Controller -Water Based, which are usually round,Mold Temperature Controller - Oil Based. The number of holes in the spinneret determines the size of the yarn,One Piece Complete Autoloader.
• 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,Detachable Type Autoloader. 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,Cabinet Dryer.
• Mold Dehumidifying Dryer,Dehumidification Drying Feeder. Also,Dehumidifier,Low Speed Granulators.

Winding

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

Low Noise Granulators

Screw Color Mixer, 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,European Type Hopper Dryers. The rope-Dehumidifier.

Drawing tow

• 1 Newly-Central Material Handling System.Dehumidifying and Drying Machine.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Middle Speed Plastic Granulator. 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)Gravimetric Dosing and Mixing Unit.Color Dose Mixer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Central Conveying System.

The Future

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