Microwaveable sheet, and production method of microwaveable sheet

Abstract

A microwaveable sheet ( 1 ) that prevents permeation of the oil and is superior in moisture permeability, and a production method thereof. The microwaveable sheet ( 1 ) has a paper substrate ( 2 ), a resin layer ( 3 ) laminated through applying a coating liquid of a resin composition on one face of the paper substrate ( 2 ), in which the resin layer ( 3 ) has a plurality of air holes ( 3 a ). The microwaveable sheet ( 1 ) preferably has a water vapor transmission rate of from 200 g/m 2 /24 hrs to 15,000 g/m 2 /24 hrs. The microwaveable sheet ( 1 ) may have air holes ( 3 a ) formed by applying a coating liquid on one face of the paper substrate ( 2 ) using a roll having an intaglio on the surface thereof, or may have air holes ( 3 a ) formed by applying a coating liquid on one face of the paper substrate ( 1 ) having a shape with fine irregularity.

1 . A microwaveable sheet comprising:
 a paper substrate; and   a resin layer laminated through applying a coating liquid of a resin composition on one face of the paper substrate,   wherein the resin layer comprises a plurality of air holes.   
     
     
         2 . The microwaveable sheet according to  claim 1 , having a water vapor transmission rate of no less than 200 g/m 2 /24 hrs and no greater than 15,000 g/m 2 /24 hrs. 
     
     
         3 . The microwaveable sheet according to  claim 1 , wherein the air holes are formed through applying the coating liquid on the one face of the paper substrate with a roll having an intaglio on a surface thereof. 
     
     
         4 . The microwaveable sheet according to  claim 1 , wherein the air holes are formed through applying the coating liquid on the one face of the paper substrate having a shape with fine irregularity. 
     
     
         5 . The microwaveable sheet according to  claim 1 , wherein an application amount of the resin composition is no less than 0.01 g/m 2  and no greater than 20 g/m 2  on a basis of a solid content. 
     
     
         6 . The microwaveable sheet according to  claim 1 , wherein the resin layer is laminated on both two faces of the paper substrate. 
     
     
         7 . The microwaveable sheet according to  claim 1 , wherein a principal component of the resin layer is an acrylic resin, an olefin-derived resin or a carbonyl group-containing resin. 
     
     
         8 . The microwaveable sheet according to  claim 1 , wherein the paper substrate is an oil-resistant paper. 
     
     
         9 . The microwaveable sheet according to  claim 1 , further comprising a printing portion provided on one face of the paper substrate. 
     
     
         10 . The microwaveable sheet according to  claim 1  having an oil shieldability from one side to another of no less than 1 hour. 
     
     
         11 . A method for producing a microwaveable sheet comprising:
 applying a coating liquid of a resin composition on one face of a paper substrate to form a resin layer, wherein   the resin layer is formed such that a plurality of air holes are provided on/through the resin layer.