有気噴射における薬液の性質と付着との関係について

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The authors have studied in laboratory the relation between the physical properties, especially on the surface activity of spray liquid and the perfomances of deposit on plant surfaces by the air blast spraying. It has been the main purposes to know how the strong wind of the applicator, as a mist- blower or helicopter, effects the performances of deposit on surfaces and in what degree the spray liquid activities are needed. The Diacotton Scarlet 4BS 0.25 per cent water solutions (red color) of various concentrations of non-ionic surfactant were sprayed by a glass nozzle on the planes of paper, gelatine and paraffine instead of plant surfaces. The results of tests are summarized as follows. When the red color solution (without surfactant) was sprayed, only a small amount of solution was deposited on the paraffin plane but the amount of deposit increased on the paper and gelatine planes in order. As the surface activity of liquid increased, however, the amount on the paraffin plane showed linear increase. But the amount on the other two planes was unchanged because the deposition became homogenous and the excess liquid ran off. As the surface activity of liquid was increased, the liquid spread in a thin film on the paper and gelatine planes and the amount of deposit on such planes decreased in reverse. When the density of mist was larger, the efficiency of deposit improved and the planes were covered with a small quantity of liquid and consequently the amunt of spray liquid can be economized. When the distance from the nozzle to plane was long the wind force of less than 3.1 m/sec velocity did not effect the deposit. It was concluded that in diluted spray the physical properties of spray liquid were : surface tension 34〜35 dyne/cm spreading index (b)(volume V, area of bottom S of a drop on the paraffin plane S (cm)=a+bV (cc)) b=6.5〜8.0 sinking time of cotton thread over 4 min. but a middle surface activity on concentrated spray was : surface tension 34〜35 dyne/cm spreading index (b) over 8.0 sinking time of cotton thread under 2 min.
日本応用動物昆虫学会の論文
1957-12-01

有気噴射における薬液の性質と付着との関係について

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