Biodegradable label for in-mold forming and biodegradable container having the label attached thereto

Abstract

The object of the present invention is to provide a biodegradable label for in-mold forming, which is excellent in water resistance, is printable to allow for printing letters, or the like, by various printing methods, and is biodegradable in a natural environment; and to provide a biodegradable container attached with this biodegradable label for in-mold forming. In the present invention, the gist of the first invention is a biodegradable label for in-mold forming, comprising a laminate film (a/b), having a film (a), comprising a biodegradable resin (A), and a film (b), comprising a heat-sealable biodegradable resin (B); and the gist of the second invention is a biodegradable container attached with this biodegradable label for in-mold forming.

1 . A laminate film comprising a film (a), comprising a biodegradable resin (A), and a film (b), comprising a heat-sealable biodegradable resin (B).  
     
     
         2 . The laminate film as claimed in  claim 1 , wherein the melting point of the heat-sealable biodegradable resin (B) is 5° C., or more, lower than the melting point of the biodegradable resin (A).  
     
     
         3 . The laminate film as claimed in  claim 1 , wherein the film (a) comprises a biodegradable resin (A) and at least an inorganic fine powder (E1), an organic filler (E2), or combinations thereof.  
     
     
         4 . The laminate film as claimed in  claim 1 , wherein the film (a) is a laminate film comprising at least a uniaxially stretched layer.  
     
     
         5 . The laminate film as claimed in  claim 1 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic oxycarboxylic acid (co)polymer, a lactone (co)polymer, and a polyester resin comprising, as essential components, an aliphatic or alicyclic dicarboxylic acid unit and an aliphatic or alicyclic diol unit.  
     
     
         6 . The laminate film as claimed in  claim 1 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic polyester and a polylactic acid, and 
 wherein each of the aliphatic polyester and the polylactic acid contains from 0.02 to 30 mol % of an aliphatic oxycarboxylic acid unit represented by the following formula [I], from 35 to 49.99 mol % of an aliphatic diol unit represented by the following formula [II], and from 35 to 49.99 mol % of an aliphatic dicarboxylic acid unit represented by the following formula [III]:                          (wherein p is 0 or an integer of 1 to 10);      —O—(CH 2 ) m —O—  [II]   (wherein m is an integer of 2 to 10); and      —OC—(CH 2 ) n —CO—  [III]   (wherein n is 0 or an integer of 1 to 12).    
     
     
         7 . The laminate film as claimed in  claim 1 , wherein the biodegradable resin (B) comprises at least one member selected from the group consisting of an aliphatic oxycarboxylic acid (co)polymer, a lactone (co)polymer, and a polyester resin comprising, as essential components, an aliphatic or alicyclic dicarboxylic acid unit and an aliphatic or alicyclic diol unit.  
     
     
         8 . The laminate film as claimed  claim 1 , wherein the biodegradable resin (B) comprises at least one member selected from the group consisting of an aliphatic polyester and a polylactic acid, and 
 wherein each of the aliphatic polyester and the polylactic acid contains from 0.02 to 30 mol % of an aliphatic oxycarboxylic acid unit represented by the following formula [I], from 35 to 49.99 mol % of an aliphatic diol unit represented by the following formula [II], and from 35 to 49.99 mol % of an aliphatic dicarboxylic acid unit represented by the following formula [III]:                          (wherein p is 0 or an integer of 1 to 10);      —O—(CH 2 ) m —O—  [II]   (wherein m is an integer of 2 to 10); and      —OC—(CH 2 ) n —CO—  [III]   (wherein n is 0 or an integer of 1 to 12).    
     
     
         9 . A biodegradable container comprising a label for in-mold forming to a surface of the container, and 
 wherein the container comprises a biodegradable resin (C), and    the label for in-mold forming, comprises a laminate film (a/b), having a film (a), comprising a biodegradable resin (A), and a film (b), comprising a heat-sealable biodegradable resin (B).    
     
     
         10 . A label comprising the laminate film of  claim 1 , and one or more other additives.  
     
     
         11 . The label of  claim 10 , wherein the label is attached to a container by in-mold forming.  
     
     
         12 . The label of  claim 11 , wherein the label is biodegradable.  
     
     
         13 . The laminate film as claimed in  claim 2 , wherein the film (a) comprises a biodegradable resin (A) and at least an inorganic fine powder (E1), an organic filler (E2), or combinations thereof.  
     
     
         14 . The laminate film as claimed in  claim 2 , wherein the film (a) is a laminate film comprising at least a uniaxially stretched layer.  
     
     
         15 . The laminate film as claimed in  claim 3 , wherein the film (a) is a laminate film comprising at least a uniaxially stretched layer.  
     
     
         16 . The laminate film as claimed in  claim 2 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic oxycarboxylic acid (co)polymer, a lactone (co)polymer, and a polyester resin comprising, as essential components, an aliphatic or alicyclic dicarboxylic acid unit and an aliphatic or alicyclic diol unit.  
     
     
         17 . The laminate film as claimed in  claim 3 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic oxycarboxylic acid (co)polymer, a lactone (co)polymer, and a polyester resin comprising, as essential components, an aliphatic or alicyclic dicarboxylic acid unit and an aliphatic or alicyclic diol unit.  
     
     
         18 . The laminate film as claimed in  claim 4 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic oxycarboxylic acid (co)polymer, a lactone (co)polymer, and a polyester resin comprising, as essential components, an aliphatic or alicyclic dicarboxylic acid unit and an aliphatic or alicyclic diol unit.  
     
     
         19 . The laminate film as claimed in  claim 2 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic polyester and a polylactic acid, and 
 wherein each of the aliphatic polyester and the polylactic acid contains from 0.02 to 30 mol % of an aliphatic oxycarboxylic acid unit represented by the following formula [I], from 35 to 49.99 mol % of an aliphatic diol unit represented by the following formula [II], and from 35 to 49.99 mol % of an aliphatic dicarboxylic acid unit represented by the following formula [III]:                          (wherein p is 0 or an integer of 1 to 10);      —O—(CH 2 ) m —O—  [II]   (wherein m is an integer of 2 to 10); and      —OC—(CH 2 ) n —CO—  [III]   (wherein n is 0 or an integer of 1 to 12).    
     
     
         20 . The laminate film as claimed in  claim 3 , wherein the biodegradable resin (A) comprises at least one member selected from the group consisting of an aliphatic polyester and a polylactic acid, and 
 wherein each of the aliphatic polyester and the polylactic acid contains from 0.02 to 30 mol % of an aliphatic oxycarboxylic acid unit represented by the following formula [I], from 35 to 49.99 mol % of an aliphatic diol unit represented by the following formula [II], and from 35 to 49.99 mol % of an aliphatic dicarboxylic acid unit represented by the following formula [III]:                          (wherein p is 0 or an integer of 1 to 10);      —O—(CH 2 ) m —O—  [II]   (wherein m is an integer of 2 to 10); and      —OC—(CH 2 ) n —CO—  [III]   (wherein n is 0 or an integer of 1 to 12).