JP2015089832A5 - - Google Patents

Claims (12)

In a cover material having at least a base material layer and a heat sealing layer, and provided on the outer surface of the heat sealing layer with a content adhesion preventing layer formed by a method in which hydrophobic inorganic fine particles are dispersed and applied in alcohol,
The content adhesion preventing lid material, wherein the heat sealing layer is made of a resin composition containing an acrylic-modified urethane resin as a main component and soluble in the alcohol.   The content adhesion prevention cover material according to claim 1, wherein the acrylic modified urethane resin forming the heat sealing layer has a molecular weight of 20,000 to 60,000.   The content adhesion prevention lid according to claim 1 or 2, wherein the acrylic-modified urethane resin forming the heat sealing layer has an acid value of 3.0 to 7.0 KOHmg / g.   The content adhesion prevention lid material according to any one of claims 1 to 3, wherein the hydrophobic inorganic fine particles are hydrophobic silica.   The content adhesion prevention lid material according to any one of claims 1 to 4, wherein the hydrophobic inorganic fine particles have an average particle diameter of 1 nm to 5,000 nm. The anti-adhesion layer, the contents of adhesion preventing lid according to any one of claims 1 to 5 coating amount of the hydrophobic inorganic fine particles are 0.2 to 1.0 g / m ^2. On the outer surface of the heat sealing layer of the lid main body formed by laminating a base material layer on a heat sealing layer made of a resin composition containing an acrylic-modified urethane resin as a main component and soluble in alcohol, A method for producing a content adhesion preventing lid material, wherein a content adhesion preventing layer is formed on the outer surface of the heat sealing layer by applying a dispersion liquid in which hydrophobic inorganic fine particles are dispersed and drying. The method according to claim 7, wherein the acrylic-modified urethane resin has a molecular weight of 20,000 to 60,000. The method for producing a content adhesion preventing lid material according to claim 7 or 8, wherein the acrylic-modified urethane resin has an acid value of 3.0 to 7.0 KOHmg / g. The method for producing a content adhesion preventing lid material according to any one of claims 7 to 9, wherein the hydrophobic inorganic fine particles are hydrophobic silica. The said alcohol is methanol or ethanol, The manufacturing method of the content adhesion prevention lid | cover material of any one of Claims 7-10. The manufacturing method of the content adhesion prevention lid | cover material of any one of Claims 7-11 performed by heating the said drying at the temperature of 60-150 degreeC.