| 摘要 |
PURPOSE:To provide a film which has strengths enough as a packaging material, dissolves quickly in cold water, and is resistant to chemicals such as acid or alkali. CONSTITUTION:This film is prepared from a comps. consisting of 100 pts.wt. itaconic-acid-modified polyvinyl alcohol and 5-20 pts.wt. carboxymethylcellulose having a viscosity of 100-7,000cps in a 1% aq. soln. at 25 deg.C. |
