INSULATION FOR PLASTIC FRAME

摘要

PROBLEM TO BE SOLVED: To provide an insulation for a plastic frame capable of being easily stored in the plastic frame while providing advantage in cost.SOLUTION: A insulation comprises: a rectangular flat plate part 4 comprising a concrete introducing surface 4a; a peripheral rib 5 which is arranged along with four sides on a back face 4b opposite to the concrete introducing surface; and partition ribs for partitioning an inner section surrounded by the peripheral rib 5 into a large number of long and narrow squares. The insulation is constructed with long and narrow blocks 2 to be stored in the long and narrow squares 7. A large number of slits 26 are formed on a bottom part of the long and narrow blocks 2 in order that the long and narrow blocks 2 may be easily folded upon the long and narrow blocks 2 are stored in the long and narrow squares 7.