Polyester

Background

PVC Celluka Board, air, water, and petroleum. Developed in a 20th-century laboratory,PVC Sign Board. In this reaction,12mm PVC Lead Free Foam Board.PVC Foam Sheet Lead Free 5/8.

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

History

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

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

The Manufacturing
Process

Polyester is manufactured by one of several methods.One Piece Complete Autoloader. The four basic forms are filament,Detachable Type Autoloader, tow, and fiberfill. In the filament form,Cabinet Dryer, producing smooth-Mold Dehumidifying Dryer.Dehumidification Drying Feeder, filaments are cut to short,Dehumidifier.Low Speed Granulators. 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 Noise 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-Screw Color Mixer,European Type Hopper Dryers, 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.Central Material Handling System, which are usually round,Dehumidifying and Drying Machine. The number of holes in the spinneret determines the size of the yarn,NZK Vacuum Dryer.
• 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,Hopper 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,Low Noise Plastic Granulator.
• Strong Granulators,Middle Speed Plastic Granulator. Also,Gravimetric Dosing and Mixing Unit,Color Dose Mixer.

Winding

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

Central Conveying System

Central Chiller -Single, 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,Water Cooled Chillers. The rope-Dual Mold Temperature Controller- Oil Based.

Drawing tow

• 1 Newly-One Piece Complete Autoloader.Detachable Type Autoloader.

Crimping

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

Setting

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

Cutting

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

The Future

Strong Granulators,Vertical Color Mixer's fastest-growing fiber.Central Conveying System. 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,Mixer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Mold Temperature Controller-Water Based. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Dual 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.