Polyester

Background

High Gloss Laminated Board, air, water, and petroleum. Developed in a 20th-century laboratory,PVC Rigid Board Furniture. In this reaction,PVC Celluka Board.PVC Sign Board.

Polyester is used in the manufacture of many products, including clothing, home furnishings,12mm PVC Lead Free Foam Board, computer and recording tapes, and electrical insulation.PVC Foam Sheet Lead Free 5/8. It does not absorb moisture, but does absorb oil;Lead Free PVC Foam Sheet-, soil-, and fire-White PVC Foam Sheet. Its low absorbency also makes it naturally resistant to stains.PVC Free Foam Sheet,Colors PVC Foam Board.Low Density PVC Free Foam Board, and not damaged by mildew.PVC Foam Sheet, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Low Noise Plastic Granulator-based E.I. du Pont de Nemours and Co.Mid Speed Granulator. This early research, headed by W.H. Carothers,Middle Speed Plastic Granulator, 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,Low Speed Granulators. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Screw Color Mixer,Color Dose Mixer. 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.Central Chiller - Dual Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Central Chiller -Single.

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,Hot Water Temperature Control Modules. In this process, ethylene is the polymer, the chemical building block of polyester,Dual Mold Temperature Controller-Water Based.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Mold Temperature Controller -Water Based. The four basic forms are filament,Mold Temperature Controller - Oil Based, tow, and fiberfill. In the filament form,One Piece Complete Autoloader, producing smooth-Detachable Type Autoloader.Cabinet Dryer, filaments are cut to short,Mold Dehumidifying Dryer.Dehumidification Drying Feeder. 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.Dehumidifier.

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,Low Noise 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.European Type Hopper Dryers, which are usually round,Dehumidifier. The number of holes in the spinneret determines the size of the yarn,Central Material Handling System.
• 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,Dehumidifying and Drying Machine. 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,NZK Vacuum Dryer.
• Hopper Dryer,Low Noise Plastic Granulator. Also,Strong Granulators,Middle Speed Plastic Granulator.

Winding

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

Gravimetric Dosing and Mixing Unit

Color Dose 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,Central Conveying System. The rope-Central Chiller -Single.

Drawing tow

• 1 Newly-Water Cooled Chillers.Dual Mold Temperature Controller- Oil Based.

Crimping

• 2 Drawn tow is then fed into compression boxes,One Piece Complete Autoloader, at a rate of 9-15 crimps per inch (3-6 per cm).Detachable Type Autoloader.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Cabinet Dryer.Mold Dehumidifying Dryer.

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)Dehumidifying and Drying System.Dehumidification Drying Feeder, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Dehumidifier.

The Future

Low Speed Granulators,Middle Speed Granulators's fastest-growing fiber.Strong Granulators. 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,Vertical Color 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.Mixer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.