Steam-Generating Composite Sheets Prepared Using Techniques in the Papermaking Process. 2. Relationships between Sheet Structures and Steam-Generation Behavior

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• 作者：Yoshiaki Kumamoto ; Masataka Ishikawa ; Hironobu Kawajiri ; Kuniyuki Nakanishi ; Akira Isogai
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2009
• 出版时间：November 18, 2009
• 年：2009
• 卷：48
• 期：22
• 页码：9930-9935
• 全文大小：308K
• 年卷期：v.48,no.22(November 18, 2009)
• ISSN：1520-5045

文摘

Steam-generating sheets for disposable body warmers were prepared using techniques in papermaking processes, from slurries of iron powder, fibrillated cellulose fiber, and activated carbon powder with various weight ratios. Heat generation behavior of the composite sheets was compared with mat-formed samples. Composite sheets with the iron powder:cellulose fiber:activated carbon powder weight ratio of 86:6:8 had suitable heat generation temperatures in the range 40−42 °C and the longest duration time (>10 h), when exposed to air in the presence of 5% NaCl. On the basis of the results, a performance diagram relating the duration time at temperatures higher than 40 °C to the weight ratios of the three components was obtained. The steam-generation behavior of the composite sheets was superior to that of mat samples in terms of steam-generation rates, duration time, and other properties. After steam generation, the sheets became harder and stiffer than the original sheets through formation of fused iron oxide layers covering the sheet surfaces.