Manufacturing Method of Three-Dimensional Cross-Linked Foam for Uppers of Shoes

Abstract

The present invention provides a manufacturing method of three-dimensional cross-linked foam for uppers of shoes, comprises preparing a plurality of foaming materials in a planar or three-dimensional shape with a cross-linked foaming suppressed; forming at least one interfacing pattern on at least one foaming material to prevent physical and chemical interactions between the foaming materials, the interfacing pattern formed of at least one interfacing material; cross-linked foaming of the foaming material having the interfacing pattern thereon to obtain a cross-linked foam in a planar shape, the cross-linked foam having at least one inner cavity structure therein; putting the planar cross-linked foam into close contact with the last and disposing the cross-linked foam and the last in a molding die having a cavity; and compression molding the cross-linked foam, inner and outer surfaces of the molded cross-linked foam having shapes corresponding to an outer surface of the last and a surface of the cavity of the molding die, respectively.

1 - 18 . (canceled) 
   
   
       19 . A manufacturing method of three-dimensional cross-linked foam for uppers of shoes, comprising:
 preparing a plurality of foaming materials in a planar or three-dimensional shape with a cross-linked foaming suppressed;   forming at least one interfacing pattern on at least one foaming material to prevent physical and chemical interactions between the foaming materials, the interfacing pattern formed of at least one interfacing material;   cross-linked foaming of the foaming material having the interfacing pattern thereon to obtain a cross-linked foam in a planar shape, the cross-linked foam having at least one inner cavity structure therein; and   putting the planar cross-linked foam into close contact with the last and processing the cross-linked foam.   
   
   
       20 . The method according to  claim 19 , wherein the foaming material is a thin film type foaming material having a uniform surface roughness. 
   
   
       21 . The method according to  claim 20 , wherein the thin film type foaming material is obtained by processing a foaming material having a shape of a sheet or a pellet. 
   
   
       22 . The method according to  claim 19 , wherein plural interfacing patterns are formed on the foaming material. 
   
   
       23 . The method according to  claim 22 , wherein all or some of the plural interfacing patterns are connected to each other. 
   
   
       24 . The method according to  claim 22 , wherein adjacent interfacing patterns among the plural interfacing patterns are connected to each other. 
   
   
       25 . The method according to  claim 19 , further comprises filling at least one of the inner cavity structure with a filler, the filler selected from gas, liquid, same material as or different material from the cross-linked foam after one of the cross-linked foaming and the processing. 
   
   
       26 . The method according to  claim 25 , wherein the filler is introduced into a housing and the housing is disposed in the inner cavity structure. 
   
   
       27 . The method according to  claim 19 , further comprises forming at least one air passage connected to at least one inner cavity structure after one of the cross-linked foaming and the processing. 
   
   
       28 . A manufacturing method of three-dimensional cross-linked foam for uppers of shoes, comprising: preparing a plurality of foaming materials in a planar or three-dimensional shape with a cross-linked foaming suppressed;
 forming at least one interfacing pattern on at least one foaming material to prevent physical and chemical interactions between the foaming materials, the interfacing pattern formed of at least one interfacing material;   cross-inked foaming of the foaming material having the interfacing pattern thereon to obtain a cross-linked foam in a planar shape, the cross-linked foam having at least one inner cavity structure therein;   putting the planar cross-linked foam into close contact with the last and disposing the cross-linked foam and the last in a molding die having a cavity; and   compression molding the cross-linked foam, inner and outer surfaces of the molded cross-linked foam having shapes corresponding to an outer surface of the last and a surface of the cavity of the molding die, respectively.   
   
   
       29 . The method according to  claim 28 , wherein the foaming material is a thin film type foaming material having a uniform surface roughness. 
   
   
       30 . The method according to  claim 29 , wherein the thin film type foaming material is obtained by processing a foaming material having a shape of a sheet or a pellet. 
   
   
       31 . The method according to  claim 28 , wherein plural interfacing patterns are formed on the foaming material. 
   
   
       32 . The method according to  claim 31 , wherein all or some of the plural interfacing patterns are connected to each other. 
   
   
       33 . The method according to  claim 31 , wherein adjacent interfacing patterns among the plural interfacing patterns are connected to each other. 
   
   
       34 . The method according to  claim 28 , further comprises filling at least one of the inner cavity structure with a filler, the filler selected from gas, liquid, same material as or different material from the cross-linked foam after one of the cross-linked foaming, the disposing and the compression molding. 
   
   
       35 . The method according to  claim 34 , wherein the filler is introduced into a housing and the housing is disposed in the inner cavity structure. 
   
   
       36 . The method according to  claim 28 , further comprises forming at least one air passage connected to at least one inner cavity structure after one of the cross-linked foaming, the disposing and the compression molding. 
   
   
       37 . The method according to  claim 28 , wherein the cavity of the molding die has a shape corresponding to one of fore-foot, middle-foot, rear-foot, inner side and outer side of the last. 
   
   
       38 . The method according to  claim 37 , wherein unevenness is formed on a surface of the cavity of the molding die to form unevenness on the cross-linked foam at a position corresponding to at least one of the inner cavity structure. 
   
   
       39 . A manufacturing method of three-dimensional cross-linked foam for uppers of shoes, comprising:
 preparing at least one foaming material in a planar or three-dimensional shape with a cross-linked foaming suppressed;   cross-linked foaming of the foaming material to obtain a planar cross-linked foam;   putting the planar cross-linked foam into close contact with the last and disposing the cross-linked foam and the last in a molding die having a cavity; and   compression molding the cross-linked foam, inner and outer surfaces of the molded cross-linked foam having shapes corresponding to an outer surface of the last and a surface of the cavity of the molding die, respectively.   
   
   
       40 . The method according to  claim 39 , wherein the foaming material is a thin film type foaming material having a uniform surface roughness. 
   
   
       41 . The method according to  claim 40 , wherein the thin film type foaming material is obtained by processing a foaming material having a shape of a sheet or a pellet. 
   
   
       42 . The method according to  claim 39 , further comprises forming at least one air passage at the cross-linked foam after one of the cross-linked foaming, the disposing and the compression molding. 
   
   
       43 . The method according to  claim 39 , wherein the cavity of the molding die has a shape corresponding to one of fore-foot, middle-foot, rear-foot, inner side and outer side of the last. 
   
   
       44 . The method according to  claim 43 , wherein unevenness is formed on a surface of the cavity of the molding die to form unevenness on the cross-linked foam.