Polyester

Background

PVC Rigid Board Furniture, air, water, and petroleum. Developed in a 20th-century laboratory,PVC Celluka Board. In this reaction,PVC Sign Board.12mm PVC Lead Free Foam Board.

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

History

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

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

The Manufacturing
Process

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

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 Noise Granulators,Screw Color Mixer, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Color Dose Mixer

Central Conveying System, 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 Chiller -Single. The rope-Water Cooled Chillers.

Drawing tow

• 1 Newly-Dual Mold Temperature Controller- Oil Based.One Piece Complete Autoloader.

Crimping

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

Setting

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

Cutting

• 4 Following heat setting,Dehumidifying and Drying System. 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)Dehumidification Drying Feeder.Dehumidifier, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Low Speed Granulators.

The Future

Middle Speed Granulators,Strong Granulators's fastest-growing fiber.Vertical Color 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,Mixer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Mold Temperature Controller-Water Based, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.