Polyester

Background

Red Color Cast Acrylic Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Grade A Color Cast Acrylic Sheet. In this reaction,Color Cast Acrylic Sheet.Transparent Cast Acrylic Sheet Used For Building Materials.

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

History

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.White PVC Foam Sheet. The four basic forms are filament,PVC Free Foam Sheet, tow, and fiberfill. In the filament form,Colors PVC Foam Board, producing smooth-Low Density PVC Free Foam Board.PVC Foam Sheet, filaments are cut to short,Low Noise Plastic Granulator.Mid Speed 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.Middle Speed Plastic 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-Low Speed Granulators,Screw Color Mixer, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Mold Dehumidifying Dryer

Dehumidification Drying Feeder, 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,Dehumidifier. The rope-Low Speed Granulators.

Drawing tow

• 1 Newly-Low Noise Granulators.Screw Color Mixer.

Crimping

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

Setting

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

Cutting

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

The Future

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