Foamed material, method for production thereof, cushioning material, thermal insulating material and structure of wall of building
AssigneeMisawa Homes Co., Ltd.
InventorsMasayuki Kamite, Haruhiko Abiko, Daisuke Tabuchi
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Abstract
A foamed material constituting a thermal insulator (360) which comprises 50 wt % or more of a non-resin component, preferably 50 to 70 wt % of a mixture of cellulose, starch and a poly(vinyl alcohol). In a more preferable embodiment, the foamed material contains 30 wt % of cellulose, 25 wt % of starch and poly(vinyl alcohol 2C, 0.7 wt % of an antioxidant, 0.2 wt % of a mildewproofing agent, 0.2 wt % of a pigment and 43.9 wt % of a polyolefin resin (2), wherein the antioxidant is a phenol type antioxidant having a melting point of 110° C. being lower than that of the polyolefin resin.
Claims29
A foamed material prepared by foaming the foaming material that contains the resin components with the foaming fluid, characterized in that the said foaming material contains the said resin components and non resin components comprising at least the cellulose, and the content of the said non resin components in the said foaming material is 50 weight % or more.
A method for producing the foamed material, characterized in that the foamed material is produced by mixed-refining the foaming material, which contains less than 50 weight % of resin component and more than 50 weight % of non resin component in total being 100 weight %, with water as the foaming fluid, and then steam-foaming.
A thermal insulating material characterized in that it is constituted by the formed material obtained by foaming the foaming material that contains the polyolefin-based resins with the foaming fluid, wherein the said foaming material contains at least one of the starch or poly-vinyl alcohol, the polyolefin-based resin and the cellulose, and the content of the mixture constituted by at least one of the starch or poly-vinyl alcohol and the cellulose in the said foaming material is 50 weight % or more.
The thermal insulating material according to 22, characterized in that the said foaming fluid is water.
A wall structure of building in which the thermal insulating material is provided between the inner wall surface material and the external wall surface material, characterized in the said thermal insulating material consists of the foamed material prepared by foaming the foaming materials which contains the resin component, the cellulose and the starch with the water, and in the forming material, the weight ratio of the said cellulose is largest.
Dependencies are inferred from the claim text.