Adhesive tape

Patent metadata

Field	Value
Publication number	US-12065597-B2
Application number	US-202017629891-A
Country	US
Kind code	B2
Filing date	Aug 27, 2020
Priority date	Aug 30, 2019
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

An object of the present invention is to provide an adhesive tape that can be removed from an adherend more easily and more rapidly. The adhesive tape of the present invention includes a base material layer, and adhesive layers on both sides of the base material layer, the base material layer has a thickness of 10 to 100 μm, a breaking strength of 20 to 90 MPa, a breaking elongation of 400% to 1,500%, and a 100% modulus of 1 to 5 MPa, and an adhesive composition forming the adhesive layers contains 1% to 40% by mass of filler particles having an average particle diameter of 0.1 to 40 μm with respect to 100% by mass of the adhesive composition.

First claim

The invention claimed is:

1. An adhesive tape comprising:
a base material layer; and
adhesive layers formed of an adhesive composition provided on both sides of the base material layer,
wherein the base material layer has a thickness of 10 to 100 μm, a breaking strength of 30 to 90 MPa, a breaking elongation of 400% to 1,500%, and a 100% modulus of 1 to 5 MPa, and
the adhesive composition comprises:
an adhesive resin; and
1% to 40% by mass of filler particles having an average particle diameter of 0.1 to 40 μm with respect to 100% by mass of the adhesive composition.

2. The adhesive tape according to claim 1 ,
wherein the base material layer has a rubber hardness of 60 to 90 A.

3. The adhesive tape according to claim 1 ,
wherein the base material layer has the breaking elongation of 400% to 1,000%.

4. The adhesive tape according to claim 1 ,
wherein the base material layer contains a styrene-based block copolymer or a hydrogenated product of the styrene-based block copolymer.

5. The adhesive tape according to claim 4 , wherein the base material layer consists of a hydrogenated product of the styrene-based block copolymer.

6. The adhesive tape according to claim 1 ,
wherein the base material layer contains a hydrogenated product of a block copolymer configured with at least a hard segment X and a soft segment Y, and
the soft segment Y in the hydrogenated product is configured with a random copolymer of a linear structural unit and a structural unit having a side chain.

7. The adhesive tape according to claim 1 ,
wherein the base material layer contains a hydrogenated product of a block copolymer configured with at least a polymer block (A) and a polymer block (B),
the polymer block (A) has a structural unit derived from a styrene-based compound as a main component, and
the polymer block (B) is a block configured with a random copolymer of a linear hydrogenated butadiene structural unit (b1) and a hydrogenated isoprene structural unit having a side chain (b2).

8. The adhesive tape according to claim 1 ,
wherein the base material layer contains a styrene-ethylene/butadiene-styrene copolymer (SEBS) or a styrene-ethylene-ethylene/propylene-styrene block copolymer (SEEPS) as a main component.

9. The adhesive tape according to claim 1 ,
wherein the filler particles have the content of 3.5% to 40% by mass with respect to 100% by mass of the adhesive composition.

10. The adhesive tape according to claim 1 , wherein the adhesive tape has a 180° peeling adhesive strength of 15 N/20 mm to 45 N/20 mm.

11. The adhesive tape according to claim 1 , wherein the filler particles has a particle size distribution (D90/D10) of 2.5 to 20.

12. The adhesive tape according to claim 1 , wherein the adhesive resin is one selected from the group consisting of an acrylic-based adhesive resin, a rubber-based adhesive resin, and a urethane-based adhesive resin.

13. The adhesive tape according to claim 1 , wherein the adhesive resin can be peeled off from an adherend by an attempt to elongate.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Watanabe Daisuke

Classifications

• C09J2483/00

  Presence of polysiloxane · CPC title

• C09J2453/001

  in the barrier layer · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J2425/001

  in the barrier layer · CPC title

• C09J2423/101

  in the barrier layer · CPC title