Pulp molded product and method of producing the same

Abstract

A pulp molded product includes a surface that has a region with an arithmetic average roughness Ra of 50 μm or less. A method of producing a pulp molded product includes: preparing a slurry that contains pulp having an average fiber length of less than 3.0 mm and water; depositing the pulp on a paper-making mold having a solid shape to form a pulp layer; dehydrating the pulp layer to obtain an undried intermediate molded product; and heating the undried intermediate molded product while sandwiching the intermediate molded product between a male mold and a female mold and applying pressure to the sandwiched intermediate molded product.

What is claimed is: 
     
         1 . A pulp molded product, comprising:
 pulp; and   a surface having a region with an arithmetic average roughness Ra of 50 μm or less.   
     
     
         2 . The pulp molded product of  claim 1 , wherein:
 the pulp has an average fiber length of less than 3.0 mm.   
     
     
         3 . The pulp molded product of  claim 2 , wherein:
 the average fiber length is 0.5 mm or more.   
     
     
         4 . The pulp molded product of  claim 1 , wherein:
 a standard deviation of a basis weight of the pulp molded product is less than 30 g/m 2 .   
     
     
         5 . The pulp molded product of  claim 1 , which has an opening and tapers in a direction away from the opening. 
     
     
         6 . The pulp molded product of  claim 1 , which is a container. 
     
     
         7 . A method of producing a pulp molded product, comprising:
 preparing a slurry that contains pulp having an average fiber length of less than 3.0 mm and water;   depositing the pulp on a paper-making mold having a solid shape to form a pulp layer;   dehydrating the pulp layer to obtain an undried intermediate molded product; and   heating the undried intermediate molded product while sandwiching the intermediate molded product between a male mold and a female mold and applying pressure to the sandwiched intermediate molded product.   
     
     
         8 . The method of producing a pulp molded product of  claim 7 , wherein the step of depositing the pulp on a paper-making mold includes
 preparing a cover member as a hollow member having an opening,   fixing the paper-making mold to the opening,   immersing in the slurry the paper-making mold fixed to the opening, and   decompressing a space surrounded by the cover member and the paper-making mold immersed in the slurry.   
     
     
         9 . The method of producing a pulp molded product of  claim 8 , comprising, as the step of immersing in the slurry the paper-making mold fixed to the opening, immersing the paper-making mold in the slurry such that the paper-making mold is positioned above the cover member.