Vacuum heat insulating material, heat insulating box using vacuum heat insulating material, refrigerator, refrigerating/air-conditioning apparatus, water heater, equipments, and manufacturing method of vacuum heat insulating material

Abstract

A method for manufacturing a vacuum heat insulating material includes: a collecting step for extruding heat-deposited resin in a continuous state from a plurality of aligned nozzles and collecting on a conveyer as a plurality of organic fibers; a reeling step for feeding the conveyer at a predetermined speed, and producing an organic fiber assembly in a reeled sheet state by applying pressure with a roller and applying heat-deposition; a core material processing step for making a core material having a predetermined size by cutting an end face of the organic fiber assembly produced by the reeling step; a decompressing step for inserting the core material into an outer cover material from an insertion opening and decompressing an inside to an almost vacuum; and an outer cover material sealing step for sealing the insertion opening of the outer cover material the inside of which is decompressed to the almost vacuum.

1 . A method for manufacturing a vacuum heat insulating material comprising:
 a collecting step for extruding heat-deposited resin in a continuous state from a plurality of aligned nozzles and collecting on a conveyer as a plurality of organic fibers;   a reeling step for feeding the conveyer at a predetermined speed, and producing an organic fiber assembly in a reeled sheet state by applying pressure with a roller and applying heat-deposition;   a core material processing step for making a core material having a predetermined size by cutting an end face of the organic fiber assembly produced by the reeling step;   a decompressing step for inserting the core material into an outer cover material from an insertion opening and decompressing an inside to an almost vacuum state; and   an outer cover material sealing step for sealing the insertion opening of the outer cover material the inside of which is decompressed to the almost vacuum state at the decompressing step.   
     
     
         2 . The method for manufacturing the vacuum heat insulating material of  claim 1 ,
 wherein the collecting step comprises:   an extruding step for continuously extruding heated and melted resin in a predetermined width from a plurality of aligned nozzles;   a fiberizing step for cooling the resin continuously extruded from the nozzles at the extruding step and then stretching by compressed air to fiberize, or a fiberizing step for blowing high-temperature air with a temperature being almost equal to a melting temperature of the resin from neighborhood of an extruding hole of the nozzles to the resin extruded from the nozzles; and   a fiber collecting step for collecting a plurality of organic fibers fiberized at the fiberizing step on the conveyer.   
     
     
         3 . The method for manufacturing the vacuum heat insulating material of  claim 1 ,
 wherein the core material processing step makes the core material having a predetermined size by cutting an end face after laminating a plurality of layers of organic fiber assembly.   
     
     
         4 . The method for manufacturing the vacuum heat insulating material of  claim 1 ,
 wherein a range to which the heat deposition is applied is no more than 20% of a total area of the organic fiber assembly formed in a sheet-shape.   
     
     
         5 . The method for manufacturing the vacuum heat insulating material of  claim 1 , wherein a fabric weight of the organic fiber assembly is at least 4.7 g/m 2  and no more than 26 g/m 2 .