Adhesive sheet

Patent metadata

Field	Value
Publication number	US-10233360-B2
Application number	US-201515129955-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Apr 2, 2014
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

Provided is a pressure sensitive adhesive sheet containing, on a substrate or a release material, a resin layer that includes a resin part (X) containing a resin as a main component, and a particle part (Y) consisting of fine particles, at least a surface (α) of the resin layer being opposite to the side thereof on which the substrate or the release material is provided having pressure sensitive adhesiveness, wherein plural concave portions having a maximum height difference of 0.5 μm or more exist in a predetermined region (P) on the surface (α), and 95% or more of the plural concave portions existing inside the region (P) have shapes differing from each other, and one or more such concave portions exist in a predetermined region (Q) on the surface (α).

First claim

The invention claimed is:

1. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (α); and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness, and
the surface (α) of the resin layer has a plurality of concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5 mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions.

2. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (β); and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness,
the surface (α) of the resin layer has a plurality of irregularly formed concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions.

3. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (α); and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness, and
the surface (α) of the resin layer has a plurality of concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5 mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions, and that
the surface (α) other than the concave portions has an irregular shape.

4. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (α), and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness,
the surface (α) of the resin layer has a plurality of concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5 mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions,
that a 1 mm×1 mm square region (Q) arbitrarily selected on the surface (α) includes one or more of the plurality of concave portions, and that at least one of the concave portions observed in the region (Q) extends to a boundary line of the region (Q).

5. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (α); and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness, and
the surface (α) of the resin layer has a plurality of concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5 mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions, and that
a 1 mm ×1 mm square region (Q) arbitrarily selected on the surface (α) includes one or more of the plurality of concave portions.

6. A pressure sensitive adhesive sheet, comprising:
a resin layer having a surface (α) and a surface (β) on an opposite side with respect to the surface (α); and
a substrate or a release material provided on the surface (β) of the resin layer,
wherein the resin layer comprises a layer (Xα) containing a resin as a main component, a layer (Xβ) containing a resin as a main component, and a layer (Y 1 ) containing fine particles having a mean particle size of 0.01 to 100 μm, in an order of the layer (Xα), the layer (Y 1 ), and the layer (Xβ) from a side of the surface (α),
the surface (α) of the resin layer has pressure sensitive adhesiveness, and
the surface (α) of the resin layer has a plurality of concave portions having a maximum height difference of 0.5 μm or more such that a 5 mm×5 mm square region (P) arbitrarily selected on the surface (α) includes two or more of the plurality of concave portions,
that 95% or more of the concave portions observed in the region (P) have different shapes, and that
a 1 mm×1 mm square region (Q) arbitrarily selected on the surface (α) includes one or more of the plurality of concave portions.

7. The pressure sensitive adhesive sheet according to claim 6 , wherein the plurality of concave portions exist irregularly on the surface (α).

8. The pressure sensitive adhesive sheet according to claim 6 , wherein the surface (α) of the resin layer other than the concave portions has an irregular shape.

9. The pressure sensitive adhesive sheet according to claim 6 , wherein at least one of the concave portions observed in the region (Q) extends to a boundary line of the region (Q).

10. The pressure sensitive adhesive sheet according to claim 9 , wherein at least one of the concave portions observed in the region (Q) extends beyond a boundary line of the region (Q).

11. The pressure sensitive adhesive sheet according to claim 6 , wherein the fine particles comprise at least one selected from the group consisting of silica particles, metal oxide particles, and smectite particles.

12. The pressure sensitive adhesive sheet according to claim 6 , wherein the resin layer comprises 3 to 90% by mass of the fine particles.

13. The pressure sensitive adhesive sheet according to claim 6 , wherein the concave portions are not formed by transferring an emboss pattern.

14. The pressure sensitive adhesive sheet according to claim 6 , wherein:
the layer (Y 1 ) comprises the fine particles in an amount of 15% by mass or more.

15. The pressure sensitive adhesive sheet according to cl

Assignees

• Lintec Corp

Inventors

• Kato Kiichiro
• Uemura Kazue
• Amino Yumiko
• Saito Shigeru

Classifications

• C09J133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C08K3/22

  of metals · CPC title

• C09J7/385

  Acrylic polymers · CPC title

• C08K3/36

  Silica · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title