カーボンブラックおよびα-酸化鉄(III)汚れの洗浄性と再汚染性に及ぼすヒドロキシプロピルセルロースの効果

概要

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The effect of hydroxypropyl cellulose (HPC) on detergency and soil redeposition behaviors of DBS toward carbon black and α-iron (III) oxide particulate soils with acetate, nylon, and polyester fabrics was studied in aqueous DBS/HPC mixed solutions with 0.05 (mol/l) of Na_2SO_4 at 40℃. The weight-average molecular weight (Mw) of HPC used was 60,000 to 1,000,000. The degrees of detergency (D) and soil redeposition (S) were measured by the optical reflectance method. HPC showed remarkable washing and anti-redeposition effects toward carbon black particulate soil, but no effect toward α-iron (III) oxide particulate soil. D increased with increasing the concentration of HPC, but S showed a reverse tendency from D toward carbon black particulate soil. A minimum in the D-HPC concentration curve was recognized toward α-iron (III) oxide particulate soil. Regardless of the kind of particulate soil, an optimum molecular weight of HPC was observed for D and S. D decreased with an increase in repeated washing cycles, but S showed an opposite tendency.
1996-07-15