Multilayer body and container

Abstract

The present invention provides a multilayer body, a packaging material and a container, each of which can maintain excellent water repellent properties and non-adhesive properties. Specifically, the present invention describes a non-adhesive multilayer body wherein hydrophobic oxide fine particles having an average primary particle diameter of 3-100 nm adhere to at least a part of the outermost layer.

1 - 26 . (canceled) 
     
     
         27 . A method for manufacturing a packaging material formed of a multilayer body having at least a base layer and a thermal adhesive layer,
 the thermal adhesive layer being laminated as the outermost layer on one side of the packaging material, and hydrophobic oxide fine particles having an average primary particle diameter of 3 to 100 nm being attached to the outside surface where the thermal adhesive layer does not adjoin another layer, wherein the hydrophobic oxide fine particles form a porous layer having a three-dimensional network structure, and wherein the hydrophobic oxide fine particles can contact with a content,   the method comprising a step of causing the hydrophobic oxide fine particles to attach to the surface of the thermal adhesive layer, the step being carried out by forming a coat on the thermal adhesive layer using a dispersion of the hydrophobic oxide fine particles dispersed in a solvent and drying the coat.   
     
     
         28 . The method for manufacturing a packaging material according to  claim 27 , wherein the step is carried out by roll coating, gravure coating, bar coating, doctor blade coating or brush painting. 
     
     
         29 . The method for manufacturing a packaging material according to  claim 27 , wherein the solvent is alcohol. 
     
     
         30 . The method for manufacturing a packaging material according to  claim 27 , wherein the amount of hydrophobic oxide fine particles attaching to the thermal adhesive layer is 0.01 to 10 g/m 2 . 
     
     
         31 . The method for manufacturing a packaging material according to  claim 27 , wherein a thickness of the porous layer is 0.1 to 5 μm. 
     
     
         32 . The method for manufacturing a packaging material according to  claim 27 , wherein the hydrophobic oxide fine particles adhere to the entire surface of the thermoplastic resin layer. 
     
     
         33 . The method for manufacturing a packaging material according to  claim 27 , wherein packaging material is a lid material of a container.