| 摘要 |
A crosslinked biodegradable resin continuous foamed sheet, characterized in that it comprises a biodegradable resin, and has an expansion ratio of 1.5 to 50 and a gel content of 3 % or more; and a method for producing the foamed sheet which comprises a step of preparing a sheet from a resin composition containing a biodegradable resin, a blowing agent of heat decomposition type and a crosslinking accelerator, a step of irradiating the resulting sheet with an ionizing radiation, to crosslink the resin composition, and a step of subjecting the crosslinked sheet to a heat treatment, to prepare a crosslinked foamed sheet continuously. The foamed sheet is biodegradable, can be recycled, has good processability, is lightweight, exhibits excellent appearance, has practically satisfactory heat resistance and is friendly to the environment, and thus can be used in a wide range of applications, for example, an interior material for an automobile or the like, a thermal insulator such as a pipe covering and a cushioning material such as a tape core.
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