Hand-tearable double-sided pressure-sensitive adhesive tape

Patent metadata

Field	Value
Publication number	US-10160885-B2
Application number	US-201615501486-A
Country	US
Kind code	B2
Filing date	Feb 23, 2016
Priority date	Feb 27, 2015
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A double-sided pressure-sensitive adhesive tape includes a support base member having a hand tearable property, a first acrylic adhesive layer on one surface of the support base member, and a second acrylic adhesive layer on another surface of the support base member. The first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less, the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more, the second acrylic adhesive layer has gel fraction X2 that is 20 mass % or more and 75 mass % or less, and the second acrylic adhesive layer has adhesive force greater than adhesive force of the first acrylic adhesive layer.

First claim

The invention claimed is:

1. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer, and
the first acrylic adhesive layer has a gel fraction X1 that is greater than the gel fraction X2 of the second acrylic adhesive layer.

2. The double-sided pressure-sensitive adhesive tape according to claim 1 , wherein the support base member has a thickness t0 that is 10 μm or more and 150 μm or less.

3. The double-sided pressure-sensitive adhesive tape according to claim 1 , wherein the support base member is made of a polyolefin resin film.

4. The double-sided pressure-sensitive adhesive tape according to claim 1 , wherein the thickness t2 of the second acrylic adhesive layer is 50 μm or more.

5. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer, and
the support base member has a thickness t0 that is 10 μm or more and 150 μm or less.

6. The double-sided pressure-sensitive adhesive tape according to claim 5 , wherein the thickness t2 of the second acrylic adhesive layer is 50 μm or more.

7. The double-sided pressure-sensitive adhesive tape according to claim 5 being used for a curing member for construction.

8. The double-sided pressure-sensitive adhesive tape according to claim 7 , wherein the acrylic adhesive layer is adhered to an object to be covered and the second acrylic adhesive layer is adhered to the curing member that covers the object to be covered.

9. The double-sided pressure-sensitive adhesive tape according to claim 5 , wherein the support base member is made of a polyolefin resin film.

10. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer,
the support base member is made of a polyolefin resin film, and
the support base member contains high density polyethylene and low density polyethylene as a composition of the polyolefin resin film.

11. The double-sided pressure-sensitive adhesive tape according to claim 10 , wherein the support base member is made of a uniaxially stretched type resin film or a resin film including a weak portion that is a tearing start portion.

12. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer,
the support base member is made of a polyolefin resin film, and
the support base member is made of a uniaxially stretched type resin film or a resin film including a weak portion that is a tearing start portion.

13. The double-sided pressure-sensitive adhesive tape according to claim 12 , wherein the support base member includes a recessed portion on at least one surface thereof as the weak portion.

14. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer,
the first acrylic adhesive layer has a gel fraction X1 that is 35 mass % or more and 90 mass % or less, and
the gel fraction X1 of the first acrylic adhesive layer is greater than the gel fraction X2 of the second acrylic adhesive layer.

15. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side of another surface of the support base member, wherein
the first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less,
the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more,
the second acrylic adhesive layer has a gel fraction X2 that is 20 mass % or more and 75 mass % or less,
the second acrylic adhesive layer has an adhesive force greater than an adhesive force of the first acrylic adhesive layer,
the first acrylic adhesive layer has a gel fraction X1 that is 35 mass % or more and 90 mass % or less, and
the support base member has a thickness t0 that is 10 μm or more and 150 μm or less.

16. A double-sided pressure-sensitive adhesive tape comprising:
a support base member having a hand tearable property;
a first acrylic adhesive layer on a side of one surface of the support base member; and
a second acrylic adhesive layer on a side o

Assignees

• Nitto Denko Corp

Inventors

• Kawamoto Takatoshi
• Shimizu Izumi
• Hanaki Ikkou
• Matsushita Kiichiro

Classifications

• C09J7/22 Primary

  Plastics; Metallised plastics · CPC title

• C09J133/066

  containing -OH groups · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J2201/622

  Chemistry & Metallurgy · mapped topic

• C09J7/38

  Pressure-sensitive adhesives [PSA] · CPC title