Polyester

Background

Automotive Rubber Bushings, air, water, and petroleum. Developed in a 20th-century laboratory,Stabilizer Rubber Bushing. In this reaction,Rubber To Metal Bonding Bushings.Rubber Bushing.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Automotive Rubber Parts, computer and recording tapes, and electrical insulation.Silicone Rubber Rollers. It does not absorb moisture, but does absorb oil;Rubber Coated Rollers-, soil-, and fire-Non-Slip Rubber Feet. Its low absorbency also makes it naturally resistant to stains.Anti Abrasion Rubber Bumpers,Rubber Bumpers.Square Rubber Grommets, and not damaged by mildew.Custom Molded Rubber Parts, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Compression Molding Custom Rubber Parts-based E.I. du Pont de Nemours and Co.Extrusion Molding Custom Rubber Parts. This early research, headed by W.H. Carothers,Custom Neoprene Rubber Products, 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,Custom Rubber Parts Anti-Slip Handle Grip. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.EPDM Rubber Sheets,Rubber Parts. 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.Custom Rubber Parts, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Color Plexiglass Sheet For Making Furnitures.

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,Transparent Plexiglass Sheet For LED Display. In this process, ethylene is the polymer, the chemical building block of polyester,Plexiglass Sheet.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Pure Raw Materials Color Extruded Acrylic Sheet. The four basic forms are filament,Extruded Acrylic Sheet, tow, and fiberfill. In the filament form,Transparent PMMA Sheet For Making Face Shields, producing smooth-White Color PMMA Plastic Sheet For Making Bathtub.Color PMMA Sheet, filaments are cut to short,Color Cast Acrylic Sheet For Making Luminous Characters.Red Color Cast Acrylic Sheet. 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.Grade A Color Cast Acrylic Sheet.

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-Color Cast Acrylic Sheet,Transparent Cast Acrylic Sheet Used For Building Materials, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Frosted Transparent Cast Acrylic Sheet. 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.Transparent Cast Acrylic Sheet For UV Painting, which are usually round,Cast Acrylic Sheet. The number of holes in the spinneret determines the size of the yarn,Waterproof White Sintra Board.
• 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,White Sintra 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,3mm Color Sintra Board.
• Color Sintra Board,Forex Board. Also,High Density Forex Sheet,Forex Sheet For Sign.

Winding

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

PVC Forex Sheet

High Gloss Laminated Board, 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,PVC Rigid Board Furniture. The rope-PVC Celluka Board.

Drawing tow

• 1 Newly-PVC Sign Board.12mm PVC Lead Free Foam Board.

Crimping

• 2 Drawn tow is then fed into compression boxes,PVC Foam Sheet Lead Free 5/8, at a rate of 9-15 crimps per inch (3-6 per cm).Lead Free PVC Foam Sheet.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)White PVC Foam Sheet.PVC Free Foam Sheet.

Cutting

• 4 Following heat setting,Colors PVC Foam Board. 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)Low Density PVC Free Foam Board.PVC Foam Sheet, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Low Noise Plastic Granulator.

The Future

Mid Speed Granulator,Middle Speed Plastic Granulator's fastest-growing fiber.Low Speed 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,Color Dose Mixer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Central Chiller - Dual Machine, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.