Pillow

Abstract

Pillow 1 according to the present invention includes a main body 3 having a concave portion 7 in the central part, and a cold insulator 5 mounted in the concave portion 7. This concave portion 7 is open in the central part of the main body side wall 8 on the side where the human nape is to be situated. The cold insulator 5 has a film for inclusion 11, and a gel material 9 which is internally included in the film for inclusion 11 and which includes a crosslinked polymer that is not in a swelled state with a medium. It is preferred that the gel material 9 includes an unfoamed polyurethane resin, and has an Asker F hardness of 10 or greater and 50 or less. Also, depth of the opening of the concave portion 7 that is open at the main body side wall 8 is preferably equal to or greater than one third of the height of this main body side wall 8. This pillow 1 is constituted so that the head region can be held with a shape fitting the shape of the neck and head, therefore, any strain is not imposed to the body.

1 . A pillow which comprises: 
 a cold insulator having a film for inclusion, and a gel material which is internally included in said film for inclusion and which comprises a crosslinked polymer that is not in a swelled state with a medium; and    a main body having a concave portion which is open in the central part of the side wall thereof and which is constituted so that the said cold insulator is mounted in said concave portion.    
   
   
       2 . The pillow according to  claim 1  wherein said gel material comprises 
 10% by weight or greater and 40% by weight or less of a latent heat storage medium having a melting point of 10° C. or greater and 20° C. or less, in a state being encased in a capsule of a resin film.    
   
   
       3 . The pillow according to  claim 1  wherein said gel material comprises 
 10% by weight or greater and 40% by weight or less of a latent heat storage medium having a melting point of 10° C. or greater and 20° C. or less, being in a powder form having a particle size of 1 μm or greater and 50 μm or less, and comprising an organic compound, in a state being encased in a capsule of a synthetic resin film.    
   
   
       4 . The pillow according to  claim 1  wherein surface temperature of said cold insulator at a position in contact with the neck region is kept at 5° C. or greater and 25° C. or less for at least 1 hour, when an adult man with a body temperature of approximately 36° C. lies thereon in an atmosphere of at 26° C. after setting the temperature of said cold insulator to be 5° C.  
   
   
       5 . The pillow according to  claim 1  wherein said cold insulator has a spring constant of 0.1 N/mm or greater and 0.7 N/mm or less and a hysteresis loss of 5% or greater and 50% or less, as measured upon compression with a compressing element having a diameter of 10 mm at a testing rate of 30 mm/min, when the temperature of said cold insulator is set to be 20° C.  
   
   
       6 . The pillow according to  claim 1  wherein said gel material comprises an unfoamed polyurethane resin, and has an Asker F hardness of 10 or greater and 50 or less.  
   
   
       7 . The pillow according to  claim 1  wherein said cold insulator is in a sheet form.  
   
   
       8 . The pillow according to  claim 1  wherein said cold insulator is in a sheet form having a thickness of equal to or less than 25 mm.  
   
   
       9 . The pillow according to  claim 1  wherein the height of said concave portion is equal to or greater than one third of the height of said side wall.  
   
   
       10 . A combination which comprises: 
 a cold insulator in a sheet form having a film for inclusion, and a gel material which is internally included in said film for inclusion and which comprises a crosslinked polymer that is not in a swelled state with a medium; and a container for encasing said cold insulator rolled or folded.