| 摘要 |
PROBLEM TO BE SOLVED: To establish the conditions for producing a foamed sheet article from a halogen-free thermoplastic synthetic resin compsn. by calender sheeting. SOLUTION: A foamed article of commercial value is obtd. from a halogen- free thermoplastic synthetic resin compsn. which has such a dynamic viscoelasticity that the storage modulus (G') at 80-250 deg.C is 103-106 Pa; the loss modulus (G") at 80-250 deg.C is 103-105 Pa; and the loss tangent (tanδ) is displaced from a value lower than 1.0 to a value of 1.0 or higher at 140-230 deg.C. |
