A Wonder Book of Rubber

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Superior Printing Company, 1917 - Rubber - 72 pages
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Page 70 - In the light of past developments, however, it is not such a long stretch to the time when the rubber tire will meet a rubber pavement and the rubber sole will walk on a rubber sidewalk. This time, in fact, is nearer than we think. Experiments in rubber...
Page 34 - ... compounded. All rubber companies making tires and repair stocks have their own compounds of different wearing qualities and colors, which are unknown to the general public; however, the following is a list of materials commonly used in compounding : ALUMINUM FLAKE: An inert heat resistant which toughens the rubber. ASBESTOS: Low conductivity of heat makes it valuable in steam packings. Useful in fireproof materials. ASPHALTUM : Softens compound, retards blooming, limits oxidation, and increases...
Page 37 - ... making jet black semi-hard rubber. RUBBER WASTE : Used as a filler, when reclaimed. SOAPSTONE : Used in place of talcs to keep rubber surfaces from sticking and as an adulterant. SULPHUR: Without which rubber could not be vulcanized. There is from 3% to 7% of sulphur in tread gum compounding. TALC : Used in preventing rubber surfaces from sticking together during manipulation or vulcanization. It is also used for dusting moulds to prevent gum from sticking to metal. It is sometimes used as a...
Page 36 - ... .9935. It is valuable as a filler and also hastens curing to a marked degree. MAGNESIA : Increases toughness and resilience and is also used to increase hardness. MAGANESE: Used in cements. OIL : Castor, linseed and rape oils used as a filler. PLUMBAGO: Sometimes called black lead, more non-combustible than most ingredients, and therefore, used in rubber compounding to make articles capable of withstanding great heat. Inert. POWDERED COAL: Cheapest for making jet black semi-hard rubber. RUBBER...
Page 26 - Only the largest manufacturers do any direct buying. The market is so changeable and its operation requires so much capital that manufacturers have found it cheaper to buy through dealers and brokers.
Page 35 - ... used in brown and maroon goods. CARBONATE OF CALCIUM : Whitening, used only as a filler. CHARCOAL: Made from bones, absorbes odors and is used in packing to withstand heat. CHARCOAL: Vegetable or burnt wood, is used in certain vulcanite and insulated wire compounds. CORK: Used in kamptulican,, in rubber as binding material; at one time used with rubber to make it waterproof ; also used to resist heat. EMERY: Used in manufacture of vulcanite wheels.
Page 33 - ... brushed over with a solution of rubber in benzine or petroleum, and then dusted with sulphur.
Page 9 - Nature's purpose of the latex. It is thought by some to serve as a reserve supply in the times of drought; others claim that it is a protection to the trees.
Page 45 - As raw rubber is taken from the storehouse it is first thrown into softening vats and soaked in hot water for a period of several hours. When soft and more workable it is put on "cracking...
Page 9 - The scope of the rubber industry is so great that we have come to look upon it as a matter of course.

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