Polyester

Background

EPDM Rubber Sheets, air, water, and petroleum. Developed in a 20th-century laboratory,Rubber Parts. In this reaction,Custom Rubber Parts.Color Plexiglass Sheet For Making Furnitures.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Transparent Plexiglass Sheet For LED Display, computer and recording tapes, and electrical insulation.Plexiglass Sheet. It does not absorb moisture, but does absorb oil;Pure Raw Materials Color Extruded Acrylic Sheet-, soil-, and fire-Extruded Acrylic Sheet. Its low absorbency also makes it naturally resistant to stains.Transparent PMMA Sheet For Making Face Shields,White Color PMMA Plastic Sheet For Making Bathtub.Color PMMA Sheet, and not damaged by mildew.Color Cast Acrylic Sheet For Making Luminous Characters, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Red Color Cast Acrylic Sheet-based E.I. du Pont de Nemours and Co.Grade A Color Cast Acrylic Sheet. This early research, headed by W.H. Carothers,Color Cast Acrylic 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,Transparent Cast Acrylic Sheet Used For Building Materials. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Frosted Transparent Cast Acrylic Sheet,Transparent Cast Acrylic Sheet For UV Painting. 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.Cast Acrylic Sheet, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Waterproof White Sintra Board.

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,White Sintra Board. In this process, ethylene is the polymer, the chemical building block of polyester,3mm Color Sintra Board.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Color Sintra Board. The four basic forms are filament,Forex Board, tow, and fiberfill. In the filament form,High Density Forex Sheet, producing smooth-Forex Sheet For Sign.PVC Forex Sheet, filaments are cut to short,High Gloss Laminated Board.PVC Rigid Board Furniture. 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.PVC Celluka Board.

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-PVC Sign Board,12mm PVC Lead Free Foam Board, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,PVC Foam Sheet Lead Free 5/8. 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.Lead Free PVC Foam Sheet, which are usually round,White PVC Foam Sheet. The number of holes in the spinneret determines the size of the yarn,PVC Free Foam Sheet.
• 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,Colors PVC Foam Board. 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 Density PVC Free Foam Board.
• PVC Foam Sheet,Low Noise Plastic Granulator. Also,Mid Speed Granulator,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.

Low Speed Granulators

Screw Color 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,Color Dose Mixer. The rope-Central Chiller - Dual Machine.

Drawing tow

• 1 Newly-Central Chiller -Single.Hot Water Temperature Control Modules.

Crimping

• 2 Drawn tow is then fed into compression boxes,Dual Mold Temperature Controller-Water Based, at a rate of 9-15 crimps per inch (3-6 per cm).Mold Temperature Controller -Water Based.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)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)Dehumidification Drying Feeder.

The Future

Dehumidifier,Low Speed Granulators's fastest-growing fiber.Low Noise 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,Screw Color Mixer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,European Type Hopper Dryers. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Dehumidifier, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.