US 12,146,081 B2
Peel-off detection label
Yumiko Amino, Funabashi (JP); Naoya Saiki, Koshigaya (JP); and Misaki Sakamoto, Saitama (JP)
Assigned to LINTEC CORPORATION, Itabashi-ku (JP)
Appl. No. 17/258,618
Filed by LINTEC CORPORATION, Itabashi-ku (JP)
PCT Filed Jul. 10, 2019, PCT No. PCT/JP2019/027243
§ 371(c)(1), (2) Date Jan. 7, 2021,
PCT Pub. No. WO2020/013212, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 2018-131858 (JP), filed on Jul. 11, 2018.
Prior Publication US 2021/0269678 A1, Sep. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09J 7/29 (2018.01); B32B 7/022 (2019.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); C09J 7/38 (2018.01); B32B 27/10 (2006.01)
CPC C09J 7/29 (2018.01) [B32B 7/022 (2019.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); C09J 7/385 (2018.01); B32B 27/10 (2013.01); B32B 2307/51 (2013.01); B32B 2307/54 (2013.01); C09J 2203/338 (2013.01); C09J 2301/122 (2020.08); C09J 2433/006 (2013.01); C09J 2475/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A peel detection label that is a laminate, comprising:
a support;
a pattern layer formed in a part of a surface of the support; and
a pressure-sensitive adhesive laminate comprising a low modulus layer (X), a high modulus layer (Y), and a pressure-sensitive adhesive layer (Z), in that order, the low modulus layer (X) comprising a first surface in contact with the support and the pattern layer and a second surface in contact with the high modulus layer (Y),
wherein the peel detection label satisfies (1) and (2):
(1): when the pressure-sensitive adhesive layer (Z) of the peel detection label is attached to an adherend and then the peel detection label is peeled off from the adherend, the maximum vertical tensile stress applied to an element of the low modulus layer (X) that is located closest to the support is 0.19 MPa or more when analyzed by a finite element method using finite element analysis software; and
(2): when the pressure-sensitive adhesive layer (Z) of the peel detection label is attached to an adherend and then the peel detection label is peeled off from the adherend, interfacial peeling occurs between the support and the pattern layer, whereby the presence or absence of peeling of the peel detection label from the adherend becomes visually detectable.