LAGGING MATERIALS WHICH ARE USED IN A VINYL HOUSE

摘要

PURPOSE: A heat insulating material is provided to improve a heat insulation effect, and to reduce heat loss by using plastic bags filled with air inside as a material of a plastic greenhouse. CONSTITUTION: A thermal welding part(12) is formed in a quilting pattern in the state of being folded in flat. The air flowed in from an air inlet(11) is flowed in to the internal space(14) between the thermal welding part. A flat spring(13) is formed to the longitudinal direction of a plastic bag(1). When the air is not injected, the plastic bag is in the state of being reeled by the elastic restoring force of the flat spring. An air outlet(15) is positioned on the opposite side of the air inlet. [Reference numerals] (AA) Direction of air inlet