Improvement of Flowability of Detergent Slurry

Abstract

The new sheet-type cleaner provided by changing slurry into a sheet, is introduced to a market to meet the customer's requirement for good usability of a washing cleaner. This study applies a slurry cleaner of a dispersal system in which cleaner particles disperse in the liquid component including mainly liquid surface-active agents. The cleaner is characteristic of non-Newtonian fluidity,whereby the fluidity become unstable to lead to variation of the producing application process. The study's object is to design the composition of a slurry cleaner with smooth fluidity and make the process design even when concentrated cleaner particles are mixed. To achieve the object, the relation between shear rate and shear stress in the fluid state of the slurry cleaner is surveyed and the main functions of fluidity is studied on basis of a formula for the Casson. Since the shear history and the transient response to inputting steps may bring variations of the evaluation, the elapsed time recorded after the slurry is prepared was regarded as the noise factor. In the study implemented according to the orthogonal array L18, the preferable reproducibility was provided in the S/N and the sensibility of the checking test, and further the variation of fluidity in the optimal condition was reduced to approximately one-half. As a result to be expected, the application process becomes stable, and some functions are enhanced to the sheet-type cleaner provided by mixing concentrated cleaner particles and further the cost reduction is achieved.