Label, method for producing label, method for using label, and adherend having label
AssigneeYupo Corporation
InventorsYuta Iwasawa, Kazuhisa Kitamura, Takahiro Zama
Life of this patent
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Abstract
A label containing a base layer (A) and an adhesive layer (C) provided in contact with one surface of the base layer (A), wherein the base layer (A) contains a thermoplastic resin and at least one of inorganic fine powder and an organic filler, and the base layer (A) is stretched in at least one direction, and the film has an internal bond strength measured according to TAPPI T569 of from 0.4 to 0.95 kg·cm on a side of the adhesive layer (C) and from 0.4 to 1.5 kg·cm on a side opposite thereto, is easily recognized by the naked eye for the fact that the film has been peeled from an adherend, and is difficult to be restored by re-adhering after peeling.
Claims15
A label containing a film containing
- a base layer (A),
- a surface layer (B) on one surface of base layer (A), and
- an adhesive layer (C) provided in contact with a surface of the base layer (A) opposite to the surface facing surface layer (B),
- the base layer (A) having a thickness of from 30 μm to 140 μm and comprising
- a thermoplastic resin and
- at least one of an inorganic fine powder and an organic filler, and being stretched in at least one direction,
- the film having an internal bond strength measured according to TAPPI T569 of from 0.4 to 0.95 kg·cm on a side of the base layer (A) and from 0.4 to 1.5 kg·cm on a side of the surface layer (B),
- the base layer (A) having a porosity shown by the following expression (1) of from 30 to 70%:
- Porosity
-
-
- of
-
-
- base
-
-
- layer
-
- (
- A
- )
-
- (
- %
- )
- =
- ρ
-
- (
- A
- )
- 0
- -
- ρ
-
- (
- A
- )
- ρ
-
- (
- A
- )
- 0
- ×
- 100
- (
- 1
- )
- wherein, in the expression (1), ρ(A)0 represents a true density of the base layer (A), and ρ(A) represents a density of the base layer (A),
- the surface layer (B) having a porosity shown by the following expression (3) of from 40 to 70%:
- Porosity
-
-
- of
-
-
- surface
-
-
- layer
-
- (
- B
- )
-
- (
- %
- )
- =
- ρ
-
- (
- B
- )
- 0
- -
- ρ
-
- (
- B
- )
- ρ
-
- (
- B
- )
- 0
- ×
- 100
- (
- 3
- )
- wherein, in the expression (3), ρ(B)0 represents a true density of the surface layer (B), and ρ(B) represents a density of the surface layer (B),
- the porosity of the surface layer (B) is larger than a porosity of the base layer (A).
Dependencies are inferred from the claim text.