Rubbers foaming

Foamed polymers Foamed sheet Foamed silicone rubber Foam fractionation... 

Common materials—such as textiles in the form of fibers or fabrics, foamed rubber, foamed plastics, thin sheets of plastic, paper, corrugated cardboard, combustible dusts, dry grass and twigs, and wood shavings—are all examples of materials with large sutface areas in relation to their volumes. In a well-estabhshed fire, materials with relatively small surface areas, such as chunks of coal or logs, burn readily. 

Mechanical whipping of polymers in a liquid form and subsequent setting in the whipped state. The manufacture of latex rubber foam is the best-known example of this approach. 

Widenor, W. M. "Model Fire Tests on Polyphosphazene Rubber and Polyvinylchloride (PVC)/Nitrile Rubber Foams"... 

SPLINTING MATERIAL ORTHO DESIGN 72X4 ROLL FORM ALUM/RUBBER FOAM 6515013589488 EA 19.76 ... 

Diverse foam structure applications In foam rubber, foamed polymers, shaving foams, milk shakes, and whipped creams, slowly draining thin liquid films (TLF) are needed. Accordingly, the rate of drainage is the most important factor in such industrial foam applications. 

During the production of rubber foam which starts from an aqueous emulsion of an elastomer, one utilizes the properties of an aqueous solution contain-... 

The latex may consist entirely of natural latex or synthetic SBR latex or maybe a mixture of both. In the Dunlop process, natural rubber foams shrink more than SBR foams during washing and drying. The load-bearing capacity of the foams at a given density falls significandy as SBR is used in place of natural rubber. 

The need to maintain elasticity of rubber is of paramount importance under any serious and severe environmental conditions. The most stable rubbers in radiation environments are polyurethanes and phenyl silaxanes which are usable at well above 108 rads (106 Gy). Butyl rubber liquefies and neoprene evolves hydrochloric acid at similar dose levels. Most polyurethane rubber foams can be used at a dose level of 109 rads (107Gy) in vacuum at temperature levels of between -85°C to +250°C. Silicone and polysulphide sealants are probably less tolerant to ionizing radiation in a nuclear plant where chemical processes are being carried out. A schematic graphical representation of the tolerance of rubbers to ionizing radiation in nuclear plant is shown below in figure 7.4. 

Foam rubber - [FOAMS] (Volll) - [FOAMED PLASTICS] (Vol 11)... 

The moisture resistance, low cost, and low-density closed-cell structure of many cellular polymers resulted in their acceptance for buoyancy in boats, floating docks, and buoys. Because each cell is a separate flotation unit, these materials cannot be destroyed by a single puncture. Foamed-in-place polyurethane between thin skins of high tensile strength is used in pleasure craft [98]. Other cellular polymers that have been used where buoyancy is needed are produced from polystyrene, polyethylene, poly(vinyl chloride), and certain types of rubber. Foams made from styrene-acrylonitrile copolymers are resistant to petroleum products [99,100]. 

Polyisocyanurate foams, polyurea foams and phenolic foams are growing rapidly in recent years. Urea-formaldehyde foams disappeared recently from the U.S. market. Rubber foams and pyranyl foams are no longer available in the worldwide market. 

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