Method to make a container for consumer goods and container for consumer goods

Abstract

The invention relates to a method of making a container for consumer goods, the method comprising: - forming a first multi-layer ( 100 ), the first multi-layer comprising a first cellulose ( 30 ) based layer and a first polymeric layer ( 31 ); - folding the first multi-layer ( 100 ) to form a package ( 10 ) comprising a lid portion and a box portion, the box portion and the lid portion being divided by an opening line, the lid portion being hinged to the box portion, the package defining a housing for the consumer goods, wherein the first multi-layer is so folded that the first polymeric layer is provided on an outer side of the first cellulose based layer; - forming an outer wrapper ( 101 ), the outer wrapper comprising a second cellulose ( 40 ) based layer and a second polymeric ( 41 ) layer; - wherein one of the first polymeric layer ( 31 ) and second polymeric layer ( 41 ) is a moisture barrier layer and the other of the first polymeric layer ( 31 ) and second polymeric layer ( 41 ) is a heat sealable layer; - wrapping the package with the outer wrapper ( 101 ), the outer wrapper covering, at least in part, the opening line, wherein the wrapping is made so that the second polymeric layer ( 41 ) is provided on an inner side of the second cellulose based layer ( 40 ); - heating the package and the outer wrapper ( 101 ), to seal the outer wrapper on the package ( 10 ), forming the container.

1 . A method of making a container for consumer goods, the method comprising:
 forming a first multi-layer, the first multi-layer comprising a first cellulose based layer and a first polymeric layer;   folding the first multi-layer to form a package comprising a lid portion and a box portion, the box portion and the lid portion being divided by an opening line, the lid portion being hinged to the box portion, the package defining a housing for the consumer goods, wherein the first multi-layer is so folded that the first polymeric layer is provided on an outer side of the first cellulose based layer;   forming an outer wrapper, the outer wrapper comprising a second cellulose based layer and a second polymeric layer;   wherein one of the first polymeric layer and second polymeric layer is a moisture barrier layer and the other of the first polymeric layer and second polymeric layer is a heat sealable layer;   wrapping the package with the outer wrapper, the outer wrapper covering, at least in part, the opening line, wherein the wrapping is made so that the second polymeric layer is provided on an inner side of the second cellulose based layer;   heating the package and the outer wrapper, to seal the outer wrapper on the package, forming the container.   
     
     
         2 . The method according to  claim 1 , wherein the first cellulose based layer defines an inner surface and an outer surface and wherein forming a first multi-layer comprises:
 coating the outer surface of the first cellulose based layer with the first polymer layer.   
     
     
         3 . The method according to  claim 1 , wherein forming an outer wrapper comprises forming an outer wrapper including a third polymeric layer. 
     
     
         4 . The method according to  claim 3 , wherein the second cellulose based layer defines an inner surface and an outer surface, wherein the first polymeric layer is a heat sealable layer, and forming the outer wrapper comprises:
 coating the inner surface of the second cellulose based layer with the second polymer layer;   coating an inner surface of the second polymer layer with the third polymer layer.   
     
     
         5 . The method according to  claim 1 , comprising:
 forming a second weakened line on the portion of the outer wrapper covering the opening line.   
     
     
         6 . The method according to  claim 1 , wherein forming a first multi-layer or forming an outer wrapper comprises forming the moisture barrier layer from an emulsion or dispersion of one or more of:
 a copolymer of styrene and acrylic esters;   a copolymer of styrene and butadiene;   a copolymer of ethylene and vinyl acetate;   a copolymer of ethylene and acrylic or methacrylic acid;   a polymer or copolymer of ethylene with propylene, 1-butene, isobutene, 1-octene, 1-hexene, norbornene;   and a wax.   
     
     
         7 . The method according to  claim 1 , wherein forming a first multi-layer or forming an outer wrapper comprises forming the heat sealable layer from an emulsion or dispersion of one or more of:
 a copolymer of ethylene;   a copolymer of methacrylic acid;   a copolymer of an ester of acrylic acid or methacrylic acid.   
     
     
         8 . A container for consumer goods, the container comprising:
 a package comprising a box portion and a lid portion, the package defining a housing for the consumer goods, the lid portion being hinged to the box portion by a hinge line, an opening line separating the box portion and the lid portion outside the hinge line, the box portion and the lid portion being formed by folding a first multi-layer blank comprising:
 a first cellulose based layer; 
 a first polymeric layer provided on an outer side of the first cellulose based layer; 
 an outer wrapper wrapped and sealed on the package and covering at least partly the opening line, the outer wrapper comprising:
 a second cellulose based layer; 
 a second polymeric layer provided on an inner side of the second cellulose based layer; 
 wherein one of the first polymeric layer and second polymeric layer is a moisture barrier layer and the other of the first polymeric layer and second polymeric layer is a heat sealable layer. 
 
   
     
     
         9 . The container according to  claim 8 , wherein the outer wrapper comprises a third polymer layer. 
     
     
         10 . The container according to  claim 9 , wherein the third polymer layer is a heat sealable layer. 
     
     
         11 . The container according to  claim 8 , wherein the outer wrapper comprises a second weakened line formed on the portion of the outer wrapper covering the opening line. 
     
     
         12 . The method according to  claim 1 , wherein the first cellulose based layer has a basis weight comprised between 180 grams per square meter and 270 grams per square meter. 
     
     
         13 . The method according to  claim 1 , wherein the second paper material layer has a basis weight comprised between 40 grams per square meter and 60 grams per square meter. 
     
     
         14 . The method according to  claim 1 , wherein the first polymeric layer or the third polymeric layer has a basis weight comprised between 4 grams per square meter and 6 grams per square meter, or wherein the second polymeric layer has a basis weight comprised between 5 grams per square meter and 12 grams per square meter. 
     
     
         15 . The container of  claim 8 , wherein the first cellulose based layer has a basis weight comprised between 180 grams per square meter and 270 grams per square meter. 
     
     
         16 . The container of  claim 8 , wherein the second paper material layer has a basis weight comprised between 40 grams per square meter and 60 grams per square meter. 
     
     
         17 . The container of  claim 8 , wherein the first polymeric layer or the third polymeric layer has a basis weight comprised between 4 grams per square meter and 6 grams per square meter, or wherein the second polymeric layer has a basis weight comprised between 5 grams per square meter and 12 grams per square meter.