PROBLEM TO BE SOLVED: To provide a warm-keeping agent for a polyolefin-based resin with which a polyolefin-based resin excellent in warm-keeping property can be obtained, and the polyolefin-based resin in which deterioration hardly occurs even if a pipe in contact with it is further heat-accumulated, can be obtained by adding it to the polyolefin-based resin as a warm-keeping property improver; and an agricultural film using it. SOLUTION: The warm-keeping agent for the polyolefin-based resin includes a perchlorate ion type hydrotalcite compound, and further, the polyolefin-based resin composition containing the warm-keeping agent is especially used for agricultural films. COPYRIGHT: (C)2012,JPO&INPIT
