Mesh sheet for curved surface formation and storage bag formed by mesh sheet

Abstract

The present invention provides a mesh sheet and a container bag which, when formed into a three-dimensional shape with a curved surface, have the ability to retain and recover said shape, and which are less prone to wrinkling, and the like. Warp threads 1a and weft threads 1b are formed by arranging first fibers 2 which comprise a single component and second fibers 3 which have at least a double-layer structure of a core portion and a sheath portion covering the surface of the core portion and in which the melting point of the component forming the sheath portion is at least 20° C. lower than whichever is lower from among the melting point of the component forming the core portion and the melting point of the first fibers 2. At least the second fibers 3 are provided to both the warp threads 1a and the weft threads 1b, and the interlacing sections of the second fibers 3 constituting the warp threads 1a and the second fibers 3 constituting the weft threads 1b are thermally bonded. The percentage of thermally bonded interlacing sections of second fibers 3, 3 among all of the interlacing sections of the warp threads 1a and the weft threads 1b is 10% to 45%.

1 . A mesh sheet for curved surface formation, wherein
 a warp and a weft are formed by arranging first fibers which are made of a single component and second fibers which each have a structure with at least two layers of a core portion and a sheath portion covering a surface of the core portion, a melting point of a component for forming the sheath portion being lower by 20° C. or more than a lower one of a melting point of a component for forming the core portion and a melting point of the first fibers,   both the warp and the weft include at least ones of the second fibers, and interlaced portions of the second fibers constituting the warp and the second fibers constituting the weft are thermally fusion-bonded, and   a fusion-bonding rate for the interlaced portions of the second fibers in all of interlaced portions in the warp and the weft is not less than 10% and not more than 45%.   
     
     
         2 . A mesh sheet for curved surface formation, wherein
 a warp and a weft are formed by arranging first fibers which are made of a single component and second fibers which each have a structure with at least two layers of a core portion and a sheath portion covering a surface of the core portion, a melting point of a component for forming the sheath portion being lower by 20° C. or more than a lower one of a melting point of a component for forming the core portion and a melting point of the first fibers,   both the warp and the weft include at least ones of the second fibers, and interlaced portions of the second fibers constituting the warp and the second fibers constituting the weft are thermally fusion-bonded, and   the number of the second fibers constituting the warp and the weft to a sum of the numbers of the first fibers and the second fibers is not less than 33% and not more than 70%.   
     
     
         3 . The mesh sheet for curved surface formation according to  claim 1 , wherein
 one or two of the first fibers and one or two of the second fibers are alternately arranged in the warp, and   one or two of the first fibers and one or two of the second fibers are alternately arranged in the weft.   
     
     
         4 . The mesh sheet for curved surface formation according to  claim 1 , wherein
 a same number of the first fibers and the same number of the second fibers are alternately arranged in either one of the warp and the weft, the same number being one or two, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         5 . The mesh sheet for curved surface formation according to  claim 1 , wherein
 either one of the warp and the weft is made only of ones of the second fibers, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         6 . The mesh sheet for curved surface formation according to  claim 1 , wherein
 fiber densities of the warp and the weft are not less than 70 fibers and not more than 120 fibers per inch.   
     
     
         7 . The mesh sheet for curved surface formation according to  claim 1 , wherein
 the first fibers and the second fibers are monofilaments.   
     
     
         8 . (canceled) 
     
     
         9 . The mesh sheet for curved surface formation according to  claim 2 , wherein
 one or two of the first fibers and one or two of the second fibers are alternately arranged in the warp, and   one or two of the first fibers and one or two of the second fibers are alternately arranged in the weft.   
     
     
         10 . The mesh sheet for curved surface formation according to  claim 2 , wherein
 a same number of the first fibers and the same number of the second fibers are alternately arranged in either one of the warp and the weft, the same number being one or two, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         11 . The mesh sheet for curved surface formation according to  claim 2 , wherein
 either one of the warp and the weft is made only of ones of the second fibers, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         12 . The mesh sheet for curved surface formation according to  claim 2 , wherein
 fiber densities of the warp and the weft are not less than 70 fibers and not more than 120 fibers per inch.   
     
     
         13 . The mesh sheet for curved surface formation according to  claim 2 , wherein
 the first fibers and the second fibers are monofilaments.   
     
     
         14 . A storage bag comprising a mesh sheet for curved surface formation, wherein
 a warp and a weft are formed by arranging first fibers which are made of a single component and second fibers which each have a structure with at least two layers of a core portion and a sheath portion covering a surface of the core portion, a melting point of a component for forming the sheath portion being lower by 20° C. or more than a lower one of a melting point of a component for forming the core portion and a melting point of the first fibers,   both the warp and the weft include at least ones of the second fibers, and interlaced portions of the second fibers constituting the warp and the second fibers constituting the weft are thermally fusion-bonded, and   a fusion-bonding rate for the interlaced portions of the second fibers in all of interlaced portions in the warp and the weft is not less than 10% and not more than 45%, wherein   the mesh sheet is formed in a three-dimensional shape having a curved surface.   
     
     
         15 . The storage bag according to  claim 14 , wherein
 one or two of the first fibers and one or two of the second fibers are alternately arranged in the warp, and   one or two of the first fibers and one or two of the second fibers are alternately arranged in the weft.   
     
     
         16 . The storage bag according to  claim 14 , wherein
 a same number of the first fibers and the same number of the second fibers are alternately arranged in either one of the warp and the weft, the same number being one or two, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         17 . The storage bag according to  claim 14 , wherein
 either one of the warp and the weft is made only of ones of the second fibers, and   three of the first fibers and one of the second fibers are alternately arranged in the other of the warp and the weft.   
     
     
         18 . The storage bag according to  claim 14 , wherein
 fiber densities of the warp and the weft are not less than 70 fibers and not more than 120 fibers per inch.   
     
     
         19 . The storage bag according to  claim 14 , wherein
 the first fibers and the second fibers are monofilaments.   
     
     
         20 . A storage bag comprising a mesh sheet for curved surface formation, wherein
 a warp and a weft are formed by arranging first fibers which are made of a single component and second fibers which each have a structure with at least two layers of a core portion and a sheath portion covering a surface of the core portion, a melting point of a component for forming the sheath portion being lower by 20° C. or more than a lower one of a melting point of a component for forming the core portion and a melting point of the first fibers,   both the warp and the weft include at least ones of the second fibers, and interlaced portions of the second fibers constituting the warp and the second fibers constituting the weft are thermally fusion-bonded, and   the number of the second fibers constituting the warp and the weft to a sum of the numbers of the first fibers and the second fibers is not less than 33% and not more than 70%, wherein   the mesh sheet is formed in a three-dimensional shape having a curved surface.   
     
     
         21 . The storage bag according to  claim 20 , wherein
 one or two of the first fibers and one or two of the second fibers are alternately arranged in the warp, and   one or two of the first fibers and one or two of the second fibers are alternately arranged in the weft.