| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate where a plasticizer is not easily extracted with water and does not evaporate easily; water and the plasticizer do not phase-separate easily from polyvinyl alcohol in the laminate, even when a laminate having a high moisture content is dried rapidly in a low temperature and low moisture environment; and interlayer bleeding of water and the plasticizer does not occur easily; and also to provide a laminate which, even when used for a long term, can maintain a stabilization effect of polyvinyl acetal while suppressing generation of odor, and can prevent occurrence of whitening.SOLUTION: Provided is a laminate comprising a layer A which comprises polyvinyl acetal (A) having an average residual hydroxyl group amount of X (mol%), a plasticizer (Ap), and a dispersant (Ad); and a layer B which comprises polyvinyl acetal (B) having an average residual hydroxyl group amount of Y (mol%) and a plasticizer (Bp), and may comprise a dispersant (Bd), where X≥Y, and the layer B contains 0.004 to 0.08 pts.mass of a sodium salt of a C8-12 carboxylic acid, especially preferably sodium 2-ethylhexanoate, relative to 100 pts.mass of polyvinyl acetal (B). |
