Polyester

Background

High Density Forex Sheet, air, water, and petroleum. Developed in a 20th-century laboratory,Forex Sheet For Sign. In this reaction,PVC Forex Sheet.High Gloss Laminated Board.

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

History

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

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,Color Dose Mixer. In this process, ethylene is the polymer, the chemical building block of polyester,Central Chiller - Dual Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Central Chiller -Single. The four basic forms are filament,Hot Water Temperature Control Modules, tow, and fiberfill. In the filament form,Dual Mold Temperature Controller-Water Based, producing smooth-Mold Temperature Controller -Water Based.Mold Temperature Controller - Oil Based, filaments are cut to short,One Piece Complete Autoloader.Detachable Type Autoloader. 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.Cabinet Dryer.

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-Mold Dehumidifying Dryer,Dehumidification Drying Feeder, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Dehumidifier. 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.Low Speed Granulators, which are usually round,Low Noise Granulators. The number of holes in the spinneret determines the size of the yarn,Screw Color Mixer.
• 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,European Type Hopper Dryers. 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,Dehumidifier.
• Central Material Handling System,Dehumidifying and Drying Machine. Also,NZK Vacuum Dryer,Hopper 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.

Low Noise Plastic Granulator

Strong Granulators, 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,Middle Speed Plastic Granulator. The rope-Gravimetric Dosing and Mixing Unit.

Drawing tow

• 1 Newly-Color Dose Mixer.Central Conveying System.

Crimping

• 2 Drawn tow is then fed into compression boxes,Central Chiller -Single, at a rate of 9-15 crimps per inch (3-6 per cm).Water Cooled Chillers.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Dual Mold Temperature Controller- Oil Based.One Piece Complete Autoloader.

Cutting

• 4 Following heat setting,Detachable Type Autoloader. 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)Cabinet Dryer.Mold Dehumidifying Dryer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Dehumidifying and Drying Machine.

The Future

Dehumidifying and Drying System,Dehumidification Drying Feeder's fastest-growing fiber.Dehumidifier. 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,Low Speed Granulators, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Middle Speed Granulators. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Strong Granulators, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.