| 摘要 |
<p>A thermoplastic resin sheet which can be used as an interlayer for laminated glasshaving excellent penetration resistance in a temperature range from low to hightemperatures. The thermoplastic resin sheet comprises a second polyvinyl acetalresin layer (B) and, superposed respectively on both sides thereof, first polyvinylacetal resin layers (A), wherein the first polyvinyl acetal resin layers (A)consist mainly of a polyvinyl alcohol acetalized with a C4-6 aldehyde(a) and the second polyvinyl acetal resin layer (B) consists mainly of a polyvinylalcohol coacetalized with a C4-6 aldehyde (a) and a C1-3aldehyde(b), the sum of monomer units (X) derived from the first aldehyde (a)and monomer units (Y) derived from the second aldehyde (b) accounting for at least55 mol% of the coacetalized polymer, the proportion of the monomer units (X) beingin the range of 0.5-80 mol%.</p> |
