OLED panel bottom protection film, and organic light-emitting display device comprising same
A bottom protection film for an OLED panel is provided. More particularly, a bottom protection film for an OLED panel, the bottom protection film having excellent bending performance due to elasticity and impact resistance, excellent alignment process workability, and excellent adhesion to an OLED panel, and being capable of preventing generation of static electricity through performing an antistatic treatment is provided.
1. A bottom protection film for an OLED panel, comprising:
a base film comprising a first adhesive layer on an upper surface of a first base material;
a carrier film comprising a second adhesive layer adhered to a lower surface of the first base material and a second base material adhered to a lower surface of the second adhesive layer; and
a liner film adhered utilizing the first adhesive layer,
wherein the first adhesive layer satisfies all of Conditions (1), (2), and (3) below:
a
t
25
°
C
.
,
0.28
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.8
,
(
1
)
at
50
°
C
.
,
0.23
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.53
,
(
2
)
at
85
°
C
.
,
0.35
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.6
,
(
3
)
wherein the first adhesive layer has, at 25° C., a storage modulus of 20,000 to 28,000 Pa and a loss modulus of 8,000 to 16,000 Pa.
2. The bottom protection film for an OLED panel of claim 1 , wherein the first adhesive layer satisfies all of Conditions (4), (5), and (6) below:
at
25
°
C
.
,
0.36
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.65
,
(
4
)
at
50
°
C
.
,
0.28
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.46
,
(
5
)
at
85
°
C
.
,
0.39
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.54
.
(
6
)
3. The bottom protection film for an OLED panel of claim 1 , wherein the first adhesive layer has, at 50° C., a storage modulus of 33,000 to 41,000 Pa and a loss modulus of 9,500 to 17,500 Pa.
4. The bottom protection film for an OLED panel of claim 1 , wherein the first adhesive layer has, at 85° C., a storage modulus of 44,500 to 52,500 Pa and a loss modulus of 18,500 to 26,500 Pa.
5. The bottom protection film for an OLED panel of claim 1 , wherein the first base material and the second base material are each a PET base material, and
the first adhesive layer and the second adhesive layer are acrylic adhesive layers.
6. The bottom protection film for an OLED panel of claim 1 , wherein a lower surface of the liner film is silicon release treated.
7. The bottom protection film for an OLED panel of claim 1 , wherein at least one surface of each of the liner film, the first base material, and the second base material is antistatic treated.
8. The bottom protection film for an OLED panel of claim 1 , wherein the first adhesive layer and the second adhesive layer comprise an antistatic agent.
9. The bottom protection film for an OLED panel of claim 1 , wherein the first adhesive layer has a thickness of 10 to 30 μm, and the first base material has a thickness of 65 to 140 μm.
10. The bottom protection film for an OLED panel of claim 1 , wherein the liner film has a thickness of 55 to 95 μn,
wherein the second adhesive layer has a thickness of 1 to 10 μm, and
wherein the second base material has a thickness of 20 to 60 μm.
11. The bottom protection film for an OLED panel of claim 1 , wherein a releasing force of the liner film is 5 gf/in (1.93 N/m) or less.
12. The bottom protection film for an OLED panel of claim 1 , wherein adhesion of the first adhesive layer measured by using a measurement method below is 250 gf/in (96.52 N/m) or higher,
wherein in the measurement method, the first adhesive layer was adhered to glass, and, after 24 hours, adhesion of the first adhesive layer was measured when the first adhesive layer was exfoliated at 180° at a rate of 5 mm per second.
13. The bottom protection film for an OLED panel of claim 1 , wherein an exfoliation force between the base film and the carrier film is 3 to 10 gf/in (1.16 to 3.86 N/m).
14. A method of applying a bottom protection film for an OLED panel, the method comprising:
exfoliating a liner film from the bottom protection film;
attaching a base film and a carrier film, from which the liner film is exfoliated, to the OLED panel; and
exfoliating the carrier film from the base film and the carrier film that are attached to the OLED panel,
wherein the bottom protection film comprises:
the base film comprising a first adhesive layer on an upper surface of a first base material;
the carrier film comprising a second adhesive layer adhered to a lower surface of the first base material and a second base material adhered to a lower surface of the second adhesive layer; and
a liner film adhered utilizing the first adhesive layer,
wherein the first adhesive layer satisfies all of Conditions (1), (2), and (3) below:
a
t
25
°
C
.
,
0.28
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.8
,
(
1
)
at
50
°
C
.
,
0.23
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.53
,
(
2
)
at
85
°
C
.
,
0.35
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.6
,
(
3
)
wherein the first adhesive layer has, at 25° C., a storage modulus of 20,000 to 28,000 Pa and a loss modulus of 8,000 to 16,000 Pa.
15. An organic light-emitting display device comprising a base film and an OLED panel,
wherein the OLED panel comprises a substrate and an organic light-emitting device on the substrate, and
the base film comprises a base material and an adhesive layer on an upper surface of the base material, and
the adhesive layer satisfies all of Conditions (1), (2), and (3):
a
t
25
°
C
.
,
0.28
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.8
,
(
1
)
at
50
°
C
.
,
0.23
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.53
,
(
2
)
at
85
°
C
.
,
0.35
≤
loss
modulus
(
Pa
)
storage
modulus
(
Pa
)
≤
0.6
,
(
3
)
wherein the first adhesive layer has, at 25° C., a storage modulus of 20,000 to 28,000 Pa and a loss modulus of 8,000 to 16,000 Pa.
16. The organic light-emitting display device of claim 15 , wherein the adhesive layer has, at 50° C., a storage modulus of 33,000 to 41,000 Pa, and a loss modulus of 9,500 to 17,500 Pa.
17. The organic light-emitting display device of claim 15 , wherein the adhesive layer has, at 85° C., a storage modulus of 44,500 to 52,500 Pa, and a loss modulus of 18,500 to 26,500 Pa.
18. The organic light-emitting display device of claim 15 , wherein adhesion of the adhesive layer measured by using a measurement method below is 250 gf/in (96.52 N/m) or higher:
wherein in the measurement method, the adhesive layer was adhered to glass, and, after 24 hours, adhesion of the adhesive layer was measured when the adhesive layer was exfoliated at 180° at a rate of 5 mm per second.
19. The organic light-emitting display device of claim 15 , wherein the adhesive layer comprises an antistatic agent.
20. The organic light-emitting display device of claim 15 , wherein at least one surface of the base material is antistatic treated.
21. The organic light-emitting display device of claim 15 , wherein a thin film including (poly(3,4-ethylene dioxythiophene)-polystyrene sulfonate (PEDOT/PSS) is coated on a lower surface of the base material to be antistatic treated.