硬泡基础交流（Rigid foam exchange）.docVIP

硬泡基础交流（Rigid foam exchange） Hard foam is no more than soft foam, self skinning, elastic: it can not be separated from the calculation - - but not all aimless, try exploration, the trick, want to touch out, probably at least half a year. For friends in critical positions (such as pipe ingredients, inspection, product development), these are not difficult - - conditional, big deal, do experiment! But for those who have just begun to enter the field or the condition is not good, the difficulty is too great; after all, the best way to know is to compare, there are several reference physics solution, much effort. Its good to know whats right and normal, but it can take a lot of sweat and effort to figure out why its right and why its not normal. The other day I want to Dalang Clay oven rolls out to show oneself, craft always in the last minute sigh: who is not afraid of a stop! After all, I did not study in the Institute of strong bubble, design and calculation of that set, are different from the master works. Fortunately, the work done on-site, and now also figured out: no technical work, and if out of the ugly, or can find out why technical meals can not go on - - in this regard, the value! Thats bullshit. Lets get down to business [about computing] A bubble is hard, black and white material proportion of the things most in need of combination material (weight ratio) is not reasonable, another formal statement is called isocyanate index, translated into vernacular is mixed according to the proportion of white and black material to complete the reaction end. Therefore, all the white matter involved in the reaction with -NCO should be taken into consideration. The amount of -NCO moles consumed by each component of the theory is calculated as follows A main ingredient: polyether, polyester, silicone oil (ordinary hard foam silicone oil has hydroxyl value, because the addition of two glycol like) formula multiplied by the number of their hydroxyl value, and then add a numb