Waterproof footwear and the manufacturing method

Abstract

A waterproof footwear, comprises a lining made of multiple layers of breathable and waterproof materials, an injected upper with mesh structure, and a sole. The mesh structure has plurality of holes to pass the air and vapor from the lining, and reduce the weight of the footwear.

What is claimed is: 
     
         1 . A waterproof footwear, comprising:
 a breathable waterproof lining comprises at least a layer of flexible textile and a layer of breathable waterproof membrane;   a supporting upper with mesh structure covering said breathable waterproof lining, wherein said mesh structure has plurality of holes to let air and vapor pass through; and   a sole attached to the bottom of said supporting upper.   
     
     
         2 . The waterproof footwear of  claim 1 , wherein said supporting upper is formed by injection molding. 
     
     
         3 . The waterproof footwear of  claim 2 , wherein the breathable waterproof membrane is made of TPU, PU, or ePTFE. 
     
     
         4 . The waterproof footwear of  claim 3 , further comprises an upper cover covering the outer surface of said supporting upper, wherein said upper cover comprises at least a layer of breathable waterproof membrane and a layer of flexible textile. 
     
     
         5 . The waterproof footwear of  claim 4 , wherein the outer surface of said upper cover is painted. 
     
     
         6 . The waterproof footwear of  claim 5 , further comprises a reinforcement structure coving portion of said upper cover to increase the strength thereof. 
     
     
         7 . A method of manufacturing waterproof footwear, comprising:
 (a) cutting and sewing a lining comprising at a layer of flexible textile and a layer of breathable waterproof membrane according to the shape and size of a last;   (b) applying said lining on said last;   (c) forming a supporting upper over the lining applied on the last by injection molding; and   (d) forming a sole attached to said supporting upper.   
     
     
         8 . The method of manufacturing waterproof footwear of  claim 7 , wherein in step (c), a mesh structure with a plurality of holes is formed. 
     
     
         9 . The method of manufacturing waterproof footwear of  claim 8 , wherein in step (c), a predetermined portion is formed thicker to increase the strength. 
     
     
         10 . The method of manufacturing waterproof footwear of  claim 8 , wherein further comprises steps of:
 (a1) cutting and sewing a upper cover comprising at least a layer of breathable waterproof membrane and a layer of flexible textile according to the shape and size of the supporting upper;   (c1) applying the upper cover to cover the supporting upper;   (c2) forming reinforcement structure over the upper cover by injection molding.   
     
     
         11 . The method of manufacturing waterproof footwear of  claim 10 , wherein further comprises steps of:
 (a2) painting the outside of the upper cover for decoration.   
     
     
         12 . The method of manufacturing waterproof footwear of  claim 7 , wherein further comprises steps of:
 (a3) sewing a waterproof pants with the lining.   
     
     
         14 . The method of manufacturing waterproof footwear of  claim 9 , wherein further comprises steps of:
 (a3) sewing a waterproof pants with the lining.   
     
     
         15 . The method of manufacturing waterproof footwear of  claim 11 , wherein further comprises steps of:
 (a3) sewing a waterproof pants with the lining.