JP2018076103A5 - - Google Patents

Claims (22)

A sheet for maintaining food freshness,
Comprising a first hydrogel sheet;
The first hydrogel sheet includes a first agarose or a derivative thereof, a polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof, and water.
The food freshness-keeping sheet characterized by the above.   The sheet for keeping food freshness according to claim 1, wherein the first agarose or a derivative thereof is agar.   The first hydrogel sheet contains 0.1 to 10% by weight of the first agarose or a derivative thereof based on the weight of the entire first hydrogel sheet. The sheet for keeping food freshness according to 1.   The polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof is polyethylene glycol, polyacrylamide, polyacrylic acid, polymethacrylic acid, poly (ethylene glycol) methacrylate, polyphosphoric acid, polystyrene sulfonic acid, and these The sheet for keeping food freshness according to any one of claims 1 to 3, wherein the sheet is selected from the group consisting of a copolymer of monomers constituting the polymer.   The food freshness-keeping product according to any one of claims 1 to 4, wherein the polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof has a weight average molecular weight of 1000 or more. Sheet.   The food freshness-keeping sheet according to claim 5, wherein the polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof has a weight average molecular weight of 10,000 or more.   The first hydrogel sheet contains 0.1 to 10% by weight of the polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof based on the weight of the entire first hydrogel sheet. The sheet for keeping food freshness according to any one of claims 1 to 6, characterized in that   The said 1st hydrogel sheet contains 0.1-10 weight% of water on the basis of the weight of this whole 1st hydrogel sheet, The any one of Claims 1-7 characterized by the above-mentioned. Food freshness preservation sheet. further,
Comprising a second hydrogel sheet laminated to the first hydrogel sheet;
The second hydrogel sheet includes a second agarose or a derivative thereof, a crosslinked water-soluble polymer salt, and water.
The food freshness-keeping sheet according to any one of claims 1 to 8, wherein   The sheet for keeping food freshness according to claim 9, wherein the second agarose or a derivative thereof is agar.   The second hydrogel sheet contains 0.1 to 10% by weight of the second agarose or a derivative thereof based on the weight of the entire second hydrogel sheet. The sheet for keeping food freshness according to 1.   The sheet for keeping food freshness according to any one of claims 9 to 11, wherein the salt of the crosslinked water-soluble polymer is a superabsorbent resin.   The salt of the crosslinked water-soluble polymer is selected from the group consisting of a crosslinked polymethacrylate, polyphosphate, polystyrene sulfonate, and a copolymer of monomers constituting the salt of these water-soluble polymers. The sheet for keeping food freshness according to any one of claims 9 to 12, which is characterized by the following.   The second hydrogel sheet comprises 0.1 to 10% by weight of the crosslinked water-soluble polymer salt based on the weight of the entire second hydrogel sheet. The sheet for keeping food freshness according to any one of the above.   The said 2nd hydrogel sheet contains 0.1-10 weight% of water on the basis of the weight of this 2nd hydrogel sheet whole, The any one of Claims 9-14 characterized by the above-mentioned. Food freshness preservation sheet.   The second hydrogel sheet is laminated on the first hydrogel sheet so that the first hydrogel sheet is opposed to the food product, according to any one of claims 9 to 15. Food freshness preservation sheet. further,
A third hydrogel sheet laminated on a surface of the second hydrogel sheet opposite to the surface facing the first hydrogel sheet;
The third hydrogel sheet includes the first agarose or a derivative thereof, the polymer capable of forming a hydrogen bond with the first agarose or a derivative thereof, and water. The sheet for keeping food freshness according to any one of the above.   A food transport container, comprising the food freshness-keeping sheet according to any one of claims 1 to 17.   The food transport container according to claim 18, further comprising a buffer sheet for holding food.   The food transport container according to claim 19, wherein the buffer sheet has holes having a size through which water vapor can pass.   The container for food transportation according to claim 19 or 20, wherein the buffer sheet has a recess adapted to the size and shape of the food.   The container for food transportation according to any one of claims 19 to 21, wherein the buffer sheet is formed using a mold prepared using a 3D printer.