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Topic: Polyethylene

	Polyethylene Summary
		Polyethylene is a long chain polymer produced by the polymerization reaction of liquid ethylene at high temperatures and pressures.
		Polyethylene was used to insulate the cables laid between France and Britain, providing a crucial line of communication towards the end of World War II.
		For common commercial grades of medium-density and high-density polyethylene, the melting point is typically in the range 120-130 degrees C. The melt point for average commercial low-density polyethylene is typically 105-115 degrees C. Most LDPE, MDPE, and HDPE grades have excellent chemical resistance and do not dissolve at room temperature because of the crystallinity.
	www.bookrags.com /Polyethylene (2645 words)

	High Density Polyethylene
		The mechanism for the polymerization of low-density polyethylene is free radical polymerization.
		Polyethylene is then recovered with the extraction of the solvent, and a filtration and drying process.
		The molecular weight of high-density polyethylene is again controlled by the temperature of catalyst preparation (too high of temperature increases spontaneous chain transfer, but increases the rate of reaction).
	www.eng.buffalo.edu /Courses/ce435/Polyethylene/CE435Kevin.htm (2108 words)

	Polyethylene - Wikipedia, the free encyclopedia
		Polyethylene is classified into several different categories based mostly on its density and branching.
		Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while heating diazomethane.
		The first industrially practical polyethylene synthesis was discovered (again by accident) by Eric Fawcett and Reginald Gibson at ICI Chemicals in 1933.
	en.wikipedia.org /wiki/Polyethylene (1667 words)

	Durasul Highly Crosslinked Polyethylene
		Continuous motion between the metal and plastic polyethylene components can cause small particles to be removed from the surface of the polyethylene. Also, the polyethylene may degrade, or age, over time.
		A molecule of polyethylene is a long chain of carbon atoms, with two hydrogen atoms attached to each carbon.
		This allows the polyethylene chains to become mobile and rearrange within the material. Any remaining free radicals combine with other free radicals, forming additional crosslinks. ; The elimination of free radicals gives Durasul its resistance to oxidation, a form of aging that may lead to embrittlement and increases wear.
	zimmer.com /z/ctl/op/global/action/1/id/7867/template/MP/.../M2/prod/y (832 words)

	MedlinePlus Drug Information: Polyethylene Glycol 3350
		Polyethylene glycol 3350 is in a class of medications called osmotic laxatives.
		Polyethylene glycol 3350 comes as a powder to be mixed with a liquid and taken by mouth.
		If you are using polyethylene glycol 3350 from a bottle, use the measuring line on the bottle cap to measure a single dose (about 1 heaping tablespoon).
	www.nlm.nih.gov /medlineplus/druginfo/medmaster/a603032.html (610 words)

	Polyethylene
		Polyethylene is the most popular plastic in the world.
		Polyethylene with molecular weights of three to six million is referred to as ultra-high molecular weight polyethylene, or UHMWPE.
		Polyethylene is vinyl polymer, made from the monomer ethylene.
	www.pslc.ws /macrog/pe.htm (374 words)

	The story of Polyethylene
		The early polyethylene rapidly found many uses, but it was soft and low melting, and so its uses were limited - for example you couldn't put boiling water into a polyethylene jug, or it would tend to collapse.
		This is in contrast to the Ziegler and Phillips polyethylenes, which because of their high crystallinity have a much higher density and are referred to as High-Density Polyethylene or HDPE.
		This was a circular piece of polyethylene pipe, about 1 metre in diameter, and teenagers especially would gyrate this on their hips in order to get fit and be in fashion.
	www.personal.rdg.ac.uk /~spsolley/pe.html (1923 words)

	NewAge Industries - Polyethylene Tubing Products - LLDPE Tubing
		Polyethylene (PE) has long been recognized as an engineering plastic that exhibits a high degree of inertness, making it attractive for use in markets such as food and beverage, laboratories, and chemical processing where leaching or permeability would present risks.
		Polyethylene is also one of the lower-cost plastic materials and satisfies many requirements that call for inexpensive, lightweight tubing.
		The inner core of polyethylene is extruded first, then farther down the production line, EVA is extruded around the inner core.
	www.newageindustries.com /polyethylene_tubing.asp (351 words)

	History of Plastics and Plastic Packaging Products - Polyethylene, Polypropylene, and More
		Polypropylene is similar to its ancestor, polyethylene, and shares polyethylene's low cost, but it is much more robust.
		One of the most impressive plastics used in the war, and a top secret, was "polytetrafluoroethylene" (PTFE), better known as "teflon," which could be deposited on metal surfaces as a scratchproof and corrosion-resistant, low-friction protective coating.
		One of the most visible parts of this plastics invasion was Earl Tupper's "tupperware," a complete line of sealable polyethylene food containers that Tupper cleverly promoted through a network of housewives who sold Tupperware as a means of bringing in some money.
	www.packagingtoday.com /introplasticexplosion.htm (1154 words)

	polyethylene compounds, applications polyethylene, polyethylene manufacturer, patterns thermoforming, blue ...
		Polyethylene is the dominant polymeric materials for cable jacketing as offering an excellent balance between technical performance and costs.
		High shear polyethylene tape is the most frequently used anti-corrosion coating under the foam.
		Go to the [ home ]: polyethylene compounds in pellet form, blue polyethylene, polyethylene applications like steel pipes coating, geo-membranes, cable jacketing, thermoforming, pipes and fittings in PE.
	www.mpb.it /map-abstract.asp (344 words)

	Polyethylene
		Polyethylenes are semi-crystalline materials with excellent chemical resistance, good fatigue and wear resistance, and a wide range of properties (due to differences in length of the polymer chain.) Polyethylenes are easy to distinguish from other plastics because they float in water.
		Polyethylenes provide good resistance to organic solvents, degreasing agents and electrolytic attack.
		The main difference between low density and high density polyethylene is low density’s flexibility.
	www.lehighvalleyplastics.com /polyethy.htm (180 words)

	Traditional Pulp and PE
		The high density polyethylene facing provides good resistance to acids and alkalies, aqueous media, oils, greases and some solvents.
		The outstanding properties of Pulp and Polyethylene make it useful in a wide variety of applications.
		All components of Cap-Seal Pulp and Polyethylene closure liner are regulated by the food and Drug Administration as indirect food additives under appropriate paragraphs of the Code of Federal Regulatios, Title 21.
	www.unipac.ca /techpulppe.html (352 words)

	Addition Polymers
		The formation of polyethylene from ethylene (ethene) may be illustrated in the graphic on the left as follows:
		LDPE - Low Density Polyethylene: The first commercial polyethylene process used peroxide catalysts at a temperature of 500 C and 1000 atomspheres of pressure.
		HDPE - High Density Polyethylene: An alternate method is to use Ziegler-Natta aluminum titanium catalysts to make HDPE which has very little branching, allows the strands to pack closely, and thus is high density.
	www.elmhurst.edu /~chm/vchembook/401addpolymers.html (438 words)

	Polyethylene
		Polyethylene is a versatile thermoplastic resin available in a wide range of melt indices, densities and additive formulations.
		Grades of polyethylene and EVA are available to meet the needs of various fabrication processes such as blown and cast film, blow molding, injection molding, extrusion coating, and laminating.
		The ease of processing and high purity make polyethylene an extremely attractive material capable of competing in a number of demanding applications.
	www.huntsman.com /polymers/index.cfm?PageID=989 (181 words)

	Polyethylene Film is UV resistant., Scapa North America
		Conformable film offers polyethylene backing that does not degrade with exposure to UV light, leaves no residue upon removal, and maintains watertight seal in all weather conditions.
		Scapa North America has introduced Polyflex® 234, a 4.5 mil heavy-duty polyethylene film single coated with 2.5 mils of a pressure sensitive synthetic rubber adhesive.
		Polyflex® 234 is highly conformable, features a polyethylene backing that will not degrade with exposure to UV light, leaves no residue on removal, and maintains a watertight seal in all weather conditions.
	news.thomasnet.com /fullstory/19609 (665 words)

	Formosa Plastics Corporation, U.S.A. - polyethylene, high density polyethylene, HDPE, linear low density polyethylene, ...
		Formosa offers high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) resins for blow molding, film extrusion, injection molding, profile extrusion, sheet extrusion, and rotational molding applications.
		We are able to serve a wide range of applications in packaging and industrial markets by licensing a variety of technologies from BP Amoco, Nippon Petrochemical Company, and Chevron Phillips Chemical Company LP (formerly Phillips Petroleum Company).
		All of Formosa's polyethylene resins are marketed under the tradename Formolene and manufactured in Point Comfort, Texas.
	www.fpcusa.com /pe/index.html (208 words)

	How to Recycle Sealed Air Polyethylene Foam Products - Sealed Air (Site not responding. Last check: 2007-10-19)
		Sealed Air® polyethylene foams may be returned for recycling at these locations; Attn.: Recycling / Return Program.
		Polyethylene materials must be free of tape, labels or any foreign materials.
		In countries, such as Germany, where laws mandate collection and recycling of used packaging, Sealed Air® polyethylene foams fit within the established infrastructure.
	www.sealedair.com /enviro/recycle_pefoam.html (99 words)

	pelican cases with closed cell polyethylene foam
		Closed cell Polyethylene: Will not absorb water - easy to clean - not affected by acids, solvents or gasoline.
		Pelican Cases are now available with Closed Cell Polyethylene Foam Material.
		Pelican Case 1450 (Interior Dims.: 15"L x 10.50"W x 1.75"T over 4.25"B) Foam filled with 1 inch thick Pre-Scored layers of closed cell Polyethylene.
	www.casesbypelican.com /foam-pe.htm (337 words)

	Polyethylene
		As the leading global supplier of every major polyethylene (PE) resin family worldwide and operator of every major production process, The Dow Chemical Company (Dow) offers a wealth of product and technology solutions, providing customers with an opportunity for potential differentiation, growth and successes in existing and emerging markets around the world.
		As a key polyethylene customer, you’ll have access to proven performance, innovation and speed to market – all backed by local support, leading material science and fabrication expertise, and a deep market understanding.
		Dow continuously invests in the products, technologies and worldwide capacities needed to remain competitive in the ever changing industry landscape and to remain an attractive partner for you to grow with.
	plastics.dow.com /about/polyethylene.htm (294 words)

	Freelin-Wade - Flexible Plastic Tubing, Pneumatic Tubing, Pneumatic Hose, Coiled Hose
		We offer two Polyethylene tubing compounds in our standard line.
		POLLY-TUBE is a Low Density Polyethylene and PE-2000 is a Linear Low Density Polyethylene.
		We can assist you in determining the ideal Polyethylene for your specific application.
	www.freelin-wade.com /Products/Polyethylene.asp (198 words)

	Polyethylene
		Toxicological evaluation of commercial mineral water bottled in polyethylene terephthalate: a cytogenetic approach with Allium cepa - Food Additives and Contaminants 1dec00
		Macrophage Phagocytosis of Polyethylene Particulate in Vitro - (abstract) Journal of Biomedical Materials Research Jan98
		Migration of Acetaldehyde from PET bottles into soft drinks containing carbonic acid.
	www.mindfully.org /Plastic/Polyethylene/polyethylene.htm (311 words)

	Alcoa KAMA -- High-Density Polyethylene (HDPE) (Site not responding. Last check: 2007-10-19)
		Alcoa Kama’s 6000 high-density polyethylene (HDPE) Series offers superior toughness, chemical resistance and low-temperature impact properties.
		Alcoa Kama offers a broad selection of high-density polyethylene rigid sheet for diverse applications, from packaging to graphic arts.
		Viewing documents in PDF format requires Adobe Acrobat Reader, which is available as a free download from the Adobe Web site.
	www.alcoa.com /kama/en/product_category.asp?cat_id=150 (200 words)

	Polyethylene - Chevron Phillips Chemical Company LLC
		Chevron Phillips Chemical’s Polyethylene Division produces HDPE, LDPE, LLDPE, MDPE, LDLPE, Metallocene PE, masterbatches, and Oxygen Scavenging Systems for a wide range of applications including pressure pipe, gasoline containers and tanks, soap and detergent bottles, flexible packaging, coating and laminations, films and more.
		As one of the world’s top producers of polyethylene, Chevron Phillips Chemical offers more than just quality products.
		Our commitment to customer service assures you responsive and knowledgeable assistance when you need it.
	www.cpchem.com /enu/polyethylene.asp (216 words)

	Polyethylene
		As a world-leading producer of polyethylene, The Dow Chemical Company (Dow) offers a wealth of product and technology solutions that provide customers an opportunity for differentiation, growth and success in existing and emerging markets around the world.
		With the help of state-of-the-art technology, Dow will work with you to custom-design resins for your specific application needs providing an opportunity for you to achieve new extremes of performance - satisfying your demands for reduced weight, increased strength, faster processing, potential lower costs and more.
		You can select from products that satisfy the toughest of challenges, from low or high density, linear low density or ultra low density and more.
	plastics.dow.com /plastics/na/prod/polyethylene (129 words)

	Snyder Polyethylene Tanks (Site not responding. Last check: 2007-10-19)
		Snyder Industries Inc. is a leading manufacturer of polyethylene tanks and containers for the storage, processing, and transportation of bulk materials in the agricultural and industrial markets.
		Snyder also specializes in custom rotational molded design and engineering of large durable plastic products for a variety of industries and applications.
		A full range of polyethylene tanks including: Vertical, Utility, Open-top, Cone Bottom, Containment Basin and Horizontal.
	www.wel-built.com /PolyTanks.htm (152 words)

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