This investigation was conducted to survey consumers' attitudes toward panty liner products being distributed in the market and their actual use as the groundwork for systematic research of panty liner products. Actual wearing test was also conducted to evaluate a feeling of wearing two kinds of panty liners composed of different materials after use for a certain period of time. Possible factors involved in a feeling of wearing panty liners were also discussed. The consumer attitude survey revealed that panty liners less likely to cause skin troubles were desired. The evaluation of panty liners tested showed that synthetic ones caused more significant itchy and irritating symptoms during the early and intermediate phases of non-menstrual period than cotton liners in the group of subjects who had experienced skin troubles related to clothes. It was hypothesized that the feeling of wearing panty liners could be changed with (i) the evaluator's skin condition, (ii) the mechanical properties of panty liners, and (iii) the nature of discharge during non-menstrual period. To test this hypothesis, pseudo-discharge solution was used to simulate friction phenomenon between a panty liner and the skin, based on which the mechanism of itching and irritating sensations that cause discomfort in wearing panty liners was discussed. Comparing with synthetic liners, those made of cotton could minimize the skin-liner friction with high maximum static friction force, and this could be a factor contributing to less itching and irritating sensations.
Deodorizations of ammonia and isovaleric acid were measured with Tedlar bag and gas detector method for wastes of daily life, mainly fibrous ones: namely, (1) newspaper, (2) extracted coffee beans roasted and ground, (3) dish towel, (4) corrugated cardboard, (5) blue jeans cloth, (6) extracted green tea, (7) extracted tea with roasted whole rice, (8) extracted coffee beans roasted and non-ground, and (9) egg shell. For comparison, the data for scoured silk and wool fibers were taken from a preceding paper1) by the same authors. For ammonia, values of the initial deodorization rate, k, were found to be in the decreasing order from (1) to (9), and those of the final capacity, C, were; (3)>(1)～(2)～ (4)>(6)>(5)>(8)>(7)>(9), respectively. For isovaleric acid, k and C values were in the orders; (1)>(9)>(6)>(2)>(3)>(5)>(8)>(4) and (3)>(1)>(6)>(4)>(2)>(5)>(8)～(9), respectively. Newspaper showed k and C values superior to any other waste. Coffee beans (8), became more effective for the deodorizations by grinding to smaller sizes. The C values of silk and wool were found to be about 29 and 10 times larger than that of newspaper, the largest in the waste materials.