One object of the present invention will wind a big grain of rice, while seaweed is isolated, and remove a kind of food wrap material so as to easily open sum, allow seaweed to be stayed on the surface of the big grain of rice according to opening and remove packaging material. Thus, food wrap material (P) passes through with a pair of of film piece (6A, 6B) one front film of covering is formed, by similarly and splitting vertically a substantially rectangular front film (1) and forming, device is opened with one point, it is a disk notch adhesive tape (2) similarly and vertically branch, with one correspond to include wherein the branch unit of the front film of a subsequent film of film piece mutually overlapped a part partly overlap. Food wrap material (P) includes: that the inverted v-shaped groove (4A, 4B) with a pair of of oblique line is formed, and records lower sound and comes the side end of a front end cross cut tape and a rear end from notch towards film It is set to the notch (5) of the horizontal line forming of the upside of inverted v-shaped groove and forms recording with a horizontal line of interdigitating cuts It is attached to the label of a potus of covering notch.
