Packaging material and container

Abstract

A packaging material is provided having a paper layer and a first coating layer laminated thereon, the first coating layer includes a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper. In addition, a packaging material is provided further having a second coating layer laminated having oil resistance, which consists of a biodegradable material.

What is clamed is:  
     
         1 . A packaging material having a paper layer and a first coating layer laminated thereon, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper.    
     
     
         2 . A packaging material having a paper layer, a first coating layer and a second coating layer laminated in this order, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said second coating layer has oil resistance and consists of a biodegradable material.    
     
     
         3 . A packaging material having a first coating layer, a paper layer and a second coating layer laminated in this order, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said second coating layer has oil resistance and consists of a biodegradable material.    
     
     
         4 . A packaging material having a paper layer, a first coating layer, a paper layer and a second coating layer laminated in this order, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said second coating layer has oil resistance and consists of a biodegradable material.    
     
     
         5 . A packaging material having an oil resistant layer, a first coating layer, a paper layer, a first coating layer, a paper layer and a second coating layer laminated in this order, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper,    said oil resistant layer consists of a biodegradable material, and    said second coating layer has oil resistance and a sealant property, and consists of a biodegradable material.    
     
     
         6 . The packaging material according to any one of  claims 1  to  5  wherein said second material is at least one selected from the group consisting of ester gum, dammar, copal, copaiba balsam, benzoin gum, gum olibanum, opopanax, sandarac, Guaiac, mastic, myrrha, Leche de vaca, kauri gum, rosin, fir balsam, elemi, chicle, jelutong, sorva, Venezuela chicle, niger gutta, Chilte, gutta katiau, Tunu, sorbinba, Massaranduba chocolate, Massaranduba balata, balata, Rosidinha, guayule, gutta percha, gutta percha, shellac, urucury wax, carnauba wax, candelilla wax, whale wax, rice bran wax, sugarcane wax, bees wax, wood wax, montan wax, oil stuff seed wax and lanolin.  
     
     
         7 . The packaging material according to  claim 6  wherein said second material comprises ester gum.  
     
     
         8 . The packaging material according to any one of  claims 1  to  5  wherein the ratio of said first material in said first coating layer is 70% by weight or less.  
     
     
         9 . The packaging material according to  claim 8  wherein the ratio of said first material in said first coating layer is in the range of from 20 to 50% by weight.  
     
     
         10 . The packaging material according to any one of  claims 2  to  5  wherein the biodegradable material of said second coating layer is at least one selected from the group consisting of poly 3-hydroxybutyric acid, polylactic acid, polylactic acid derivatives, polybutylene succinate, modified polymerized resins derived from starch, and a shellac resin.  
     
     
         11 . The packaging material according to  claim 10  wherein the biodegradable material of said second coating layer is a modified polymerized resin derived from starch, and said modified polymerized resin is an ester compound having the blocking ratio of hydroxyl groups with lauric acid and dextrin of 80% or greater.  
     
     
         12 . The packaging material according to any one of  claims 1  to  5  wherein at least one face of said paper layer is clay coated.  
     
     
         13 . The packaging material according to  claim 12  wherein the face of said paper layer to be laminated with said first coating layer is clay coated.  
     
     
         14 . A container which is produced using the packaging material according to any one of  claims 1  to  13 .  
     
     
         15 . A container which is produced using the packaging material according to any one of  claims 2  to  5 , and is produced so that said second coating layer becomes an inside face of the container.  
     
     
         16 . A container which comprises paper having at least a first coating layer laminated thereon, and a biodegradable material, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper.    
     
     
         17 . The container according to any one of  claims 14  to  16  which comprises a cylindrical side body.  
     
     
         18 . A container which comprises an outer container of which base material is paper, and an inner container made from a pulp mold which is fit to inside of said outer container, 
 wherein the inside face of said outer container has a first coating layer formed, and    the inside face of said inner container has a second coating layer formed,    said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and    the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said second coating layer has oil resistance, and consists of a biodegradable material.    
     
     
         19 . The container according to  claim 18  wherein the biodegradable material of said second coating layer is a shellac resin.  
     
     
         20 . A container which comprises an outer container made from a pulp mold, and an inner container which is fit to inside of said outer container, of which base material is paper, 
 wherein the outside face of said inner container has a first coating layer formed, the inside face of said inner container has a second coating layer formed,    said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said second coating layer has oil resistance, and consists of a biodegradable material.    
     
     
         21 . The container according to any one of  claims 18  to  20  wherein a spaced layer is formed to a part of the facing zone between said inner container and said outer container.  
     
     
         22 . A process for producing a container using a packaging material having at least a paper layer and a first coating layer laminated, and a biodegradable sealant layer laminated to the outermost face, in such a manner to allow a part of said packaging material is overlaid, 
 said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    said process comprises a skived hemming processing performed such that the outermost face of the end face of the overlaid part where said packaging material is overlaid becomes said sealant layer.    
     
     
         23 . A container produced using a packaging material having at least a paper layer and a first coating layer laminated, and a biodegradable sealant layer is laminated to the outermost face, 
 wherein a side body is formed by overlaying the end to an end of said packaging material such that said sealant layer is positioned to the inside face,    said first coating layer comprises a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper, and    wherein skived hemming processing is carried out such that the outermost face of the end face of the overlaid part where said packaging material is overlaid becomes said sealant layer.