Foam-spray test

The first three patients with allergic contact dermatitis were exposed for 2-8 months to PU chemicals containing different diisocyanates - in paint laboratory work (IPDI), in PU foam spraying (MDI) and car spray painting (HDI) - before they developed dermatitis. On patch testing, they reacted to IPDI, TMDI, TDI, HDI and MDA. Two of the patients also had diisocyanate-induced asthma confirmed by bronchial challenge, in one case with MDI and in the other with HDI (Kanerva et al. 1989). 

B.3.3.1 To classify a flammable aerosol, data on its flammable components, on its chemical heat of combustion and, if applicable, the results of the aerosol foam flammability test (for foam aerosols) and of the ignition distance test and enclosed space test (for spray aerosols) are necessary. 

Application verification (AV) monitors are devices that are placed within test plots to measure actual spray deposition that occurred during application. The main function of AV monitors is to show whether or not the intended amount of test material was actually deposited on the soil surface. Application monitors consisting of soil-filled containers, paper disks, polyurethane foam plugs, and glass Petri dishes have all been used successfully for this purpose. Prior to using a monitor in the field, it is important to determine that the test substance can indeed be successfully extracted from the monitor and that the compound will be stable on the monitor under field conditions... 

The acceptance test for foam-water sprinkler and water spray systems is similar to systems without foam. Tests include ... 

Flow test for deluge and water spray—see Section 9.8.3. Additionally the flow test should ensure that foam coverage meets the design requirements. 

Some of the quantitative consequences of hot spot theory were presented in Ref 19. A qualitative discussion of heat flow in a compressed gas bubble hot spot was also presented in Ref 19. The necessity of having enough, but not too much, liquid or solid spray or foam within a compressed gas bubble (in order to have sufficient heat flow from the bubble to the surrounding condensed explosive) provides another hard-to-control variable in impact testing and thus increases the variability of test results... 

The antifoams were studied on a foam from 1% commercial sulphonol solution. The rate of foam breakdown, caused by the antifoam sprayed, is determined by the foam volume destroyed for 1 min and by the lifetime of one half of the foam column. As tests showed the change in the content of the foaming composition affects the activity of the antifoaming agent but the relative foam stability almost does not change. 

The properties of the spray foam have been tested completely. The foam meets all demands of the market. 

AX-109 Large-Scale Corner Wall Tests of Spray-On Coatings Over Rigid Polyurethane Foam Insulation (U103). 

Peroxide hazard on concentration do not distill or evaporate without first testing for the presence of peroxides. Date containers when opened and discard or test for peroxides 6 months after opening. On small fires, use dry chemical powder (such as Purple-K-Powder), alcohol-resistant foam, water spray, or COj extinguishers. 

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