Bag Sealing Tape, and Banding Device and Banding Method Using the Bag Sealing Tape

A bag sealing tape for being wound around a bag whose opening is closed into a neck defining a given midportion circumference, the bag sealing tape comprising:

• a tape-like base film, one side of the tape-like film having a surface for adhesion layers;
• and
• a single-rowed plurality of adhesion layers each being made of an adhesive adhered to the surface of the base film, the adhesion layers aligned lengthwise along the base film and spaced apart from each other lengthwise by non-adhesion zones where adhesive is not adhered to the base-film surface, each adhesion layer forming an adhesion zone of length greater than the midportion circumference of the bag neck such that the bag sealing tape is self-adhesive when banded around the bag neck so as to seal the bag neck;
• wherein
• with the bag sealing tape adhered to itself such that one of the adhesion layers is adhered to another of the adhesion layers, reband-enabling inter-layer separation peel strength (A) is smaller than adhesion strength (B) between each adhesion layer and the base film,
• the peel strength (A) in a tension test in which a T-type peeling of the adhesion layers adhered to each other is performed at a tension speed of 300 mm/min is from 3 to 5 N/10 mm,
• the reband-enabling inter-layer separation peel strength (A) and the adhesion strength (B) are predetermined such that the adhesion layers do not peel off from the base film despite banding, in which the adhesion layers are adhered together, and opening, in which the adhered adhesion layers are separated from each other, being repeatedly performed in repeated use of the bag sealing tape, and
• the adhesion layers are each composed of at least natural rubber, styrene-isoprene-styrene copolymerization rubber, hydrogenated petroleum resin, and terpene phenolic resin, wherein the rubbers constitute a pressure sensitive adhesive and the resins are tackifiers.