US 11,745,527 B2
Pressure sensitive transfer correcting tape
Keitaro Kobayashi, Yokohama (JP); Kazuhisa Aoki, Hachioji (JP); and Akihiro Sakamoto, Kobe (JP)
Assigned to Tombow Pencil Co., Ltd., Tokyo (JP)
Filed by Tombow Pencil Co., Ltd., Tokyo (JP)
Filed on Mar. 13, 2019, as Appl. No. 16/352,450.
Claims priority of application No. 2018-045133 (JP), filed on Mar. 13, 2018.
Prior Publication US 2019/0283476 A1, Sep. 19, 2019
Int. Cl. B41J 31/09 (2006.01); C08K 3/36 (2006.01)
CPC B41J 31/09 (2013.01) [C08K 3/36 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A pressure sensitive transfer correcting tape comprising:
a release substrate comprising paper or a plastic film; and
a pressure sensitive transfer layer comprising at least a correcting and covering layer and a pressure sensitive adhesive layer laminated sequentially on one side of the release substrate;
wherein the correcting and covering layer contains a porous first silica and an acid-modified rosin, a pigment, and an extender pigment; and
wherein the porous first silica has an oil absorption in a range of 160 to 230 ml/100 g, and wherein the correcting and covering layer has a porous silica content of 1% to 10% by mass, such that the pressure sensitive transfer layer is configured to resist bleeding from a line drawn with a writing instrument containing oil-based ink or aqueous ink, wherein the extender pigment includes magnesium carbonate.