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Topic: Natural rubber

Related Topics

Rubber

Rubber tree

Synthetic rubber

Para rubber tree

Elastomer

Vulcanization

Latex

Polymerization

Bypass ratio

Isoprene

	Rubber - MSN Encarta (Site not responding. Last check: 2007-10-08)
		Natural rubber is obtained from the milky white fluid called latex, found in many plants; synthetic rubbers are produced from unsaturated hydrocarbons.
		Crude rubber from other plant sources is generally contaminated by an admixture of resins that must be removed before the rubber is suitable for use.
		Crude rubber is insoluble in water, alkali, and weak acid; it is soluble in benzene, gasoline, chlorinated hydrocarbons, and carbon disulfide.
	encarta.msn.com /encyclopedia_761556347/Rubber.html (579 words)

	EH.Net Encyclopedia: The International Natural Rubber Market, 1870-1930
		Natural rubber was first used by the indigenous peoples of the Amazon basin for a variety of purposes.
		Rubber was taken, like other commodities, to ports in Europe and the US to be distributed to the industries that bought large amounts of the product in the London or New York commodities exchanges.
		Previous consumers of rubber did not show the kind of dynamism needed to spur entry by plantations into the natural rubber market, even though prices were very high throughout most of second half of the nineteenth century.
	eh.net /encyclopedia/article/frank.international.rubber.market (4213 words)

	Rubber - Wikipedia, the free encyclopedia
		Rubber is an elastic hydrocarbon polymer which occurs as a milky colloidal suspension (known as latex) in the sap of several varieties of plants.
		Relaxation of a stretched rubber band is thus driven by an increase in entropy, and the force experienced is not electrostatic, rather it is a result of the thermal energy of the material being converted to kinetic energy.
		Natural rubber is often vulcanized, a process by which the rubber is heated and sulfur, peroxide or Bisphenol are added to improve resilience and elasticity, and to prevent it from perishing.
	en.wikipedia.org /wiki/Rubber (1500 words)

	rubber. The Columbia Encyclopedia, Sixth Edition. 2001-05
		Natural rubber is obtained from the milky secretion (latex) of various plants, but the only important commercial source of natural rubber (sometimes called Pará rubber) is the tree Hevea brasiliensis.
		Thus, for most purposes, the rubber is ground, dissolved in a suitable solvent, and compounded with other ingredients, e.g., fillers and pigments such as carbon fl for strength and whiting for stiffening; antioxidants; plasticizers, usually in the form of oils, waxes, or tars; accelerators; and vulcanizing agents.
		Silicone rubbers are organic derivatives of inorganic polymers, e.g., the polymer of dimethysilanediol.
	www.bartleby.com /65/ru/rubber.html (1423 words)

	Firestone Natural Rubber Company, LLC, celebrates 80 years of partnership with the people of Liberia, Africa. (Site not responding. Last check: 2007-10-08)
		Rubber, one of the most versatile raw materials in the world, is used in literally thousands of products.
		Growing and processing natural rubber is one of the most exacting and complex of the agricultural industries.
		Natural rubber from Liberia is exported in two basic forms: latex concentrate and baled dry rubber.
	www.firestonenaturalrubber.com /index.asp?id=kidskorner (1097 words)

	FR 9/30/97 Natural Rubber-Containing Medical Devices; User Labeling
		``Natural latex,'' for the purposes of this rule, is defined as a milky fluid that consists of extremely small particles of rubber obtained from plants, principally from the H. brasiliensis (rubber) tree, dispersed in an aqueous medium.
		Natural Rubber-Containing Devices; Labeling FDA is requiring the labeling for medical devices containing natural rubber that contacts humans to include a statement regarding the presence of natural rubber.
		This includes contact when the natural rubber containing device is connected to the patient by a liquid path or an enclosed gas path; or the natural rubber containing device is powdered, and the powder may carry natural latex proteins that may contaminate the environment of the user or patient.
	www.fda.gov /cdrh/dsma/fr93097.html (7971 words)

	Rubber Faqs
		Prior to 1839, the properties of rubber were dictated by the surrounding temperature.
		General purpose synthetic rubber has its origin in two gases: butadiene, a by-product of petroleum refining, and styrene, captured either in the coking process or as a petroleum refining by-product.
		Five gallons are used as feedstock (from which the substances that combine to form synthetic rubber are derived), while two gallons supply the energy necessary for the manufacturing process.
	www.rma.org /about_rma/rubber_faqs (620 words)

	Natural Rubber - History and Developments in the Natural Rubber Industry
		The next landmark in the history of natural rubber was the Spanish discovery of the use of latex for the water proofing of leather and fabrics in 1615.
		Whilst the rubber industry was developing rapidly in the temperate climate of Britain, with Macintosh and others producing a whole range of products from rubber fishing dinghies to beer hoses, the US industry was losing confidence with factories closing down due to the extremes of climate.
		Thermoplastic natural rubber is a blend of natural rubber with polypropylene to give a recyclable rubber, and new liquid natural rubbers have been developed for a variety of uses.
	www.azom.com /details.asp?ArticleID=2101 (1523 words)

	International Rubber Research & Development Board
		Natural rubber is a vital agricultural commodity used in the manufacture of a wide range of products.
		Products made from natural rubber, especially tyres; engineering components and latex products (used in the battle against AIDS and other disease) are essential to modern life.
		Development of the natural rubber industry during the last 100 years has relied upon the injection of well-targeted research and development: agronomic science, such as breeding to raise productivity, and physics, chemistry and technology to support and expand a growing portfolio of applications.
	www.irrdb.com /IRRDB/NaturalRubber/Default.htm (185 words)

	Recycling Tires: The nature of rubber (Site not responding. Last check: 2007-10-08)
		Automotive tires are made from synthetic rubber derived from petroleum, the development of which was inspired by interest in improving on the performance of natural rubber.
		Natural rubber is obtained from the liquid latex secreted by certain plants, primarily the Para rubber tree plant — Hevea brasiliensis — native to the jungles of the Amazon.
		Natural rubber's potential for making waterproof fabrics and a wide range of other consumer and industrial goods was best appreciated at room temperature.
	www.dnr.state.oh.us /recycling/awareness/facts/tires/rubberis.htm (387 words)

	IISRP - We use Rubber in so many ways
		As Ralph Wolfe's poetic prose confirms, rubber is as indispensable to modern society as steel and wood and mortar.
		Synthetic rubber is man-made and is produced around the world in manufacturing plants that synthesize it from petroleum and other minerals.
		Natural rubber has been available for centuries, synthetic rubber for less than a hundred years.
	www.iisrp.com /synthetic-rubber.html (546 words)

	Rubber Polymers
		Rubber is an example of an elastomer type polymer, where the polymer has the ability to return to its original shape after being stretched or deformed.
		Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
		Charles Goodyear accidentally discovered that by mixing sulfur and rubber, the properties of the rubber improved in being tougher, resistant to heat and cold, and increased in elasticity.
	www.elmhurst.edu /~chm/vchembook/403rubber.html (419 words)

	Indian Natural Rubber
		Rubber trees are for a long period which can build new bark more than 12 times means taping can be done from A to Z panels by maintaining the phloem liquid through in puts.
		The missing of Synthetic Rubber was 40834 tonnes.
		This year missing of synthetic rubber is Nil, but natural rubber missing is going on.
	rubber.wordpress.com (2008 words)

	IndustryPlayer - Entrepreneur Game - License Info Natural Rubber (AGRICULTURE)
		Rubber starts life as a milky emulsion called Latex which is the sap of the Para rubber tree.
		The object of processing is to extract the solid rubber from the latex liquid in the same way that butter is made from milk.
		The global production of natural rubber in 2003 was 8m tonnes (Source : FAO United Nations) with the major producers being Thailand 2.8m Indonesia 1.8m Malaysia 0.9m and India 0.6m tonnes.
	www.industryplayer.com /licenceinfo.php?licid=000220 (509 words)

	Rubber
		Rubber is a name given to a lot of different polymers that are all elastomers.
		Rubber actually got its name when people in Britain figured out that it could be used to erase or "rub out" mistakes made with a pencil.
		These days natural rubber is treated to give it crosslinks, which makes it an even better elastomer.
	www.pslc.ws /macrog/kidsmac/rubber.htm (1223 words)

	TIB: Potential for Allergy to Natural Rubber Latex Gloves and other Natural Rubber Products
		Natural rubber is utilized in a variety of products including gloves, airways, airway masks, medication vial tops, anesthesia bags, various catheters, supplies for intravenous use, dental dams, balloons, and other products.
		Natural rubber articles are manufactured in some workplaces (e.g., manufacturers of medical gloves, industrial gloves, balloons, rubber bands, boots and shoes, and many other products).
		Natural rubber latex hypersensitivity: incidence and prevalence of type I allergy in the dental professional.
	www.osha.gov /dts/tib/tib_data/tib19990412.html (3719 words)

	Astlett Rubber Inc.: Natural Rubber
		This natural rubber page is provided to assist you with useful information on the basics of the various grades of standard natural rubber that are currently available.
		Individual rubber producing countries are in charge of setting the acceptable limits for each grade of rubber they produce.
		Prior to the invention of the TSR (Technically Specified Rubber) scheme, Natural Rubber was collected from small holders in various forms and separated into specific grades based on a visual inspection.
	www.astlettrubber.com /nr (710 words)

	GOM (Site not responding. Last check: 2007-10-08)
		Rubber trees are among the taller trees in the rain forest.
		Just under the bark of the rubber trees is a soft tissue that is rich with a creamy liquid called latex.
		Slanting cuts in the bark of a rubber tree guide the sap into a small cup which is then gathered by Rubber Tappers.
	www.theguardians.com /rainforest/htmlsite/factfile/rubber.htm (512 words)

	Natural Rubber - Products for Natural Rubber - Manufacturers,Exporters,Suppliers,Traders,Companies,Factories
		Natural Rubber SVR And Synthetic Rubber BR, SBR
		Natural Rubber: SVR 3L, SVR 5, SVR 10, SVR 20.
		Vietnamese Natural Rubber Svr 3l, Svr 10, Rss -3
	www.alibaba.com /productsearch/Natural_Rubber.html (607 words)

	Rubber Sheets, Rolls, Natural Rubber, Vulcanized Rubber, Natural Rubber Suppliers, Natural Rubber Spec, Rubbers
		Features: Natural Rubber features low compression set, high tensile strength, high resilience, high abrasion and high tear resistance properties, with a good friction surface and excellent adhesion to metals.
		Until the invention of synthetic elastomers in the 1930's, Natural Rubber was the only polymer available for Oring manufacture.
		Limitations: The poor resistance of Natural Rubber to attack by petroleum oils was the primary reason for the research and development of synthetic rubbers beginning in the 1930's.
	www.plasticshimsandgaskets.co.uk /psg_apps/stage1/rubber.htm (294 words)

	Astlett Rubber Inc.
		Astlett Rubber is a trader and distributor of raw materials and we have been serving the rubber industry since 1885.
		Our decades worth of experience in the rubber industry means we have the best producers and transportation networks to provide our customers with the products and services they need.
		Natural Rubber is also available in a number of special chemical and physical forms.
	www.astlettrubber.com (306 words)

	(Help Desk) Natural Rubber Substitutes (MDDI archive, Jan 00)
		Latex is the liquid harvested from the rubber tree, which is coagulated to form natural rubber.
		This is caused by an immune reaction to naturally occurring proteins on the surface and within the NR compound.
		Silicone rubber elastomer can be made into puncture-resealable septum devices (injection sites and ports), but in order for this material to meet the pressure reseal requirement the molded silicone must generally be held under compression.
	www.devicelink.com /mddi/archive/00/01/006.html (747 words)

	Nanoparticles vs. Rubber - Could Nanomaterials Replace Rubber?
		Rubber, like cotton, is an agricultural commodity sourced primarily in its natural form from southern producers such as India, Indonesia, Thailand and Malaysia.
		Although 75% of world rubber was synthetic in 1964, the introduction of radial car tyres helped revive the market for natural rubber.
		In 2004, total global rubber production is expected to be 19.61 million tonnes of which 8.26 million will be natural rubber (42%).
	www.azonano.com /Details.asp?ArticleID=1351 (699 words)

	Rubber Tubing, Dipped Natural Latex Tube
		This is important since proteins in natural rubber can cause severe allergic reactions in those individuals who are allergic to the types of protein found in natural rubber.
		Natural latex is a milky white secretion that is found in a variety of plants.
		The stock is passed through rollers that shear the rubber breaking down the polymer chains.
	www.primelineindustries.com (482 words)

	NIOSH/latex alert
		At present, scientific data are incomplete regarding the natural history of latex allergy.
		Several types of synthetic rubber are also referred to as "latex," but these do not release the proteins that cause allergic reactions.
		A prospective, controlled study showing that rubber gloves are the major contributor to latex aeroallergen levels in the operating room.
	www.cdc.gov /niosh/latexalt.html (4086 words)

	Reverend Rubber
		The problem is that they are trying to duplicate the structure of natural rubber in an attempt to duplicate the properties.
		When polymerized, chloroprene forms an elastic material very similar to fully vulcanized rubber, except that the new material is resistant to degradation by oil, sunlight, and air, and chlorprene rubber does not require the addition of sulfur for vulcanization.
		After tires are made and tested by Dayton Rubber Manufacturing Co., in Dayton, Ohio, and a report of satisfactory performance is released in June, 1934, the public begins to take notice.
	www.pslc.ws /macrog/exp/rubber/synth/reverend.htm (1067 words)

	Sunflower Rubber?
		Latex is made up of rubber particles surrounded by water and other plant compounds.
		As rubber factories of the future, lanky sunflowers would reduce America's dependence on imported natural rubber and on synthetic rubber made from petroleum.
		Although synthetic rubber can be substituted in some instances for natural rubber, high-performance products such as airplane tires require natural rubber.
	www.ars.usda.gov /is/AR/archive/jun02/rubber0602.htm (523 words)

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