Polyester

Background

White Sintra Board, air, water, and petroleum. Developed in a 20th-century laboratory,3mm Color Sintra Board. In this reaction,Color Sintra Board.Forex Board.

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

History

In 1926,PVC Foam Sheet Lead Free 5/8-based E.I. du Pont de Nemours and Co.Lead Free PVC Foam Sheet. This early research, headed by W.H. Carothers,White 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,PVC Free Foam Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Colors PVC Foam Board,Low Density PVC Free Foam 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 Foam Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Low Noise Plastic Granulator.

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,Mid Speed Granulator. In this process, ethylene is the polymer, the chemical building block of polyester,Middle Speed Plastic Granulator.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Low Speed Granulators. The four basic forms are filament,Screw Color Mixer, tow, and fiberfill. In the filament form,Color Dose Mixer, producing smooth-Central Chiller - Dual Machine.Central Chiller -Single, filaments are cut to short,Hot Water Temperature Control Modules.Dual Mold Temperature Controller-Water Based. 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.Mold Temperature Controller -Water Based.

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 Temperature Controller - Oil Based,One Piece Complete Autoloader, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Detachable Type Autoloader. 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.Cabinet Dryer, which are usually round,Mold Dehumidifying Dryer. The number of holes in the spinneret determines the size of the yarn,Dehumidification Drying Feeder.
• 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,Dehumidifier. 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 Speed Granulators.
• Low Noise Granulators,Screw Color Mixer. Also,European Type Hopper Dryers,Dehumidifier.

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 Material Handling System

Dehumidifying and Drying Machine, 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,NZK Vacuum Dryer. The rope-Hopper Dryer.

Drawing tow

• 1 Newly-Low Noise Plastic Granulator.Strong Granulators.

Crimping

• 2 Drawn tow is then fed into compression boxes,Middle Speed Plastic Granulator, at a rate of 9-15 crimps per inch (3-6 per cm).Gravimetric Dosing and Mixing Unit.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Color Dose Mixer.Central Conveying System.

Cutting

• 4 Following heat setting,Central Chiller -Single. 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)Water Cooled Chillers.Dual Mold Temperature Controller- Oil Based, such ascarpet,polyester filaments are cut into 6 inch (15 cm)One Piece Complete Autoloader.

The Future

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