ADDING MATERIAL FOR RETAINING FOOD FRESHNESS, PAPER MATERIAL FOR PACKAGING FOOD, AND CARDBOARD BOX FOR FOOD

摘要

PROBLEM TO BE SOLVED: To provide an adding material for retaining food freshness, a paper material for packaging food, and a cardboard box for food, each of which is highly effective in retaining freshness, has a longer duration, and can employ a bamboo as a material.SOLUTION: An adding material for retaining food freshness is made of powder of a bamboo and is used by being added to a paper surface treatment material. A cardboard box 20 for food is made up of a first craft liner 21 having the powder of the bamboo attached to the surface thereof, a second craft liner 22 without the powder of the bamboo, and a cardboard plate having a corrugating medium 23. The first craft liner 21 is oriented to the inside of the box.