Multilayer sheet comprising fabric and resin, travel bag case made therefrom, and apparatus for manufacturing same

Abstract

According to the present invention, in some embodiments, since a first resin, a first fabric and a second resin are layered and coupled to each other and the first resin and the second resin are coupled by through-holes of the first fabric, the first resin and the second resin are uniformly absorbed and coated on the surface of the first fabric, and the first resin, the first fabric, and the second resin are closely coupled to each other, thereby enabling a unique color of the first fabric to be displayed on the exterior, a travel bag having very excellent compactness, tensile strength and impact strength to be manufactured, a travel bag having excellent quality to be provided even if manufacturing costs and manufacturing processes are decreased, and a travel bag capable of maximizing user convenience and the operability of the travel bag by remarkably reducing the weight to be provided.

1 . A multilayer sheet constituting a case of a travel bag, the shape of which is made through plastic working such that articles are contained therein, the multilayer sheet having elastically restoring power and comprising:
 a first fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric;   a first resin laminated on the first fabric and absorbed and coated on a surface of the first fabric; and   a second resin laminated on the first fabric from a side opposite to the first resin, absorbed and coated on the surface of the first fabric, and coupled to the first resin via the through-holes.   
     
     
         2 . The multilayer sheet as claimed in  claim 1 , comprising:
 a second fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric, the second fabric being laminated on the first resin from a side opposite to the first fabric; and   a third fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric, the third fabric being laminated on the second resin from the side opposite to the first fabric.   
     
     
         3 . The multilayer sheet as claimed in  claim 1 , wherein the first fabric is made of a woven material, the first fabric, the first resin, and the second resin are made of polypropylene, and at least one of the first resin and the second resin is configured to be transparent. 
     
     
         4 . (canceled) 
     
     
         5 . A case of a travel bag comprising a multilayer sheet as claimed in  claim 1  configured by press working. 
     
     
         6 . A case manufacturing device for manufacturing a case of a travel bag, the shape of which is made through plastic working such that articles are contained therein, the travel bag having elastically restoring power, the case manufacturing device comprising:
 a first fabric supply portion configured to continuously supply a first fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric;   a first resin supply portion configured to continuously supply a molten first resin in a directly downward direction;   a first roller and a second roller rotating in opposite directions while constituting a pair such that the first fabric and the first resin pass between the first roller and the second roller and become laminated on each other;   a second resin supply portion configured to continuously supply a molten second resin in a directly downward direction; and   a third roller and a fourth roller rotating in opposite directions while constituting a pair such that the first resin, the first fabric, and the second resin pass between the third roller and the fourth roller and become laminated successively, thereby coupling and combining the first resin and the second resin via the through-holes.   
     
     
         7 . The case manufacturing device as claimed in  claim 6 , wherein the first roller is configured to directly contact the first resin; the second roller is configured to directly contact the first fabric; the third roller is configured to directly contact the first resin laminated on the first fabric; the fourth roller is configured to directly contact the second resin; and the first roller, the second roller, the third roller, and the fourth roller are continuously arranged in a row. 
     
     
         8 . The case manufacturing device as claimed in  claim 7 , further comprising a fifth roller arranged adjacent to the fourth roller and configured to rotate in the opposite direction to the fourth roller, wherein the surface temperature of the second roller is higher than the surface temperature of the first roller, the surface temperature of the third roller and the fourth roller is higher than the surface of the second roller, and the surface temperature of the fifth roller is higher than the surface temperature of the third roller and the fourth roller. 
     
     
         9 . The case manufacturing device as claimed in  claim 6 , further comprising a second fabric supply portion configured to continuously supply a second fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric, wherein the first roller and the second roller are configured such that the second fabric, the first resin, and the first fabric pass between the first roller and the second roller and become laminated successively. 
     
     
         10 . The case manufacturing device as claimed in  claim 9 , further comprising a third fabric supply portion configured to continuously supply a third fabric that comprises a fabric configured by coupling of fibers and has multiple through-holes penetrating the fabric, wherein the third roller and the fourth roller are configured such that the second fabric, the first resin, the first fabric, the second resin, and the third fabric between the third roller and the fourth roller and become laminated successively. 
     
     
         11 . The case manufacturing device as claimed in  claim 6 , comprising:
 a sheet clamp configured to hold an edge of a multilayer sheet comprising the first resin, the first fabric, and the second resin after passing through the third roller and the fourth roller;   a preheater having multiple slots into which the sheet clamp is inserted, the preheater being configured such that a hot wind is supplied and circulated therein; and   a molding machine configured to press-work the multilayer sheet preheated through the preheater, wherein the slots are arranged to be spaced apart from each other in a leftward/rightward direction.