PROBLEM TO BE SOLVED: To provide an agricultural house heat insulating material which has block property optimal for growth of plants, heat insulation and heat block property, preferable dew condensation prevention property and convergence property in use time, and light weight.SOLUTION: The agricultural house heat insulating material comprises a laminate 9 obtained by laminating in order from outside, a flat yarn textile layer 5, a heat insulation layer 6, a resin film layer 7, and a layer 8 with functionality. The laminate is jointed and integrated at straight parts which are parallel to a winding shaft direction of a winding or vertical to a folding direction, at a plurality of positions. An interval of junction and integration at straight parts of the plurality of straight parts is 1 inch or greater 10 inches or smaller, a basis weight of the layer with functionality is 20 g/m2 or greater and less than 100 g/m2, a maximum thickness of the laminate is 1.5 mm or greater and 12 mm or less, and a light block ratio is 50% or greater and less than 100% in the agricultural house heat insulating material.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】植物の生育に最適な遮光性を有すると共に、保温性と遮熱性を有し、使用時の結露防止および収束性が良好で、かつ軽量である農業用ハウス保温材を提供する。【解決手段】外側から順に、フラットヤーン織物層５と、保温層６と、樹脂フィルム層７と、機能性を有する層８とを積層した積層体９からなる農業用ハウス保温材であって、前記積層体が、複数箇所で、折り畳み方向に対して垂直または巻き取りの巻き取り軸方向に対して平行な直線部分で接合一体化され、前記複数箇所の直線部分で接合一体化させた互いの間隔が１インチ以上１０インチ以下で、前記機能性を有する層の目付が、２０ｇ／ｍ２以上１００ｇ／ｍ２未満で、前記積層体の最大厚みが１．５ｍｍ以上１２ｍｍ以下で、かつ遮光率が５０％以上１００％未満であることを特徴とする農業用ハウス保温材。【選択図】図１
