Re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive, and fastening system using the same

• US 6,120,866 A
• Filed: 08/06/1996
• Issued: 09/19/2000
• Est. Priority Date: 08/07/1995
• Status: Expired due to Fees

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Maeda, Kazuhisa, Hori, Katsumi, Arakawa, Masaaki
• Primary Examiner(s): DAVIS, JENNA L
• Application Number:
  US08/692,467
• Time in Patent Office: 1,505 Days
• Field of Search: 428/355 BL, 428/355 AC, 428/355 RA, 428/40.1
• US Class Current: 428/40.1
• CPC Class Codes: A61F 13/58 Adhesive tab fastener elements A61F13/5611, A61F13/5616, A61F13/66 take precedence
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/2852 Adhesive compositions

Abstract

A re-peeling pressure-sensitive adhesive or a re-peeling pressure-sensitive adhesive tape satisfying four conditions, besides (3) and (4), (1) and (2) or (1'"'"') and (2'"'"'): (1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 10 to 100 meters/minute is from 50 to 1,000 g/25 mm, (2) the difference between the maximum value and the minimum value of the releasing force of the releasing chart pattern obtained by the release in (1) is not larger than 2/3 of the average releasing force or not larger than 500 g/25 mm, (1'"'"') the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is from 100 g/25 mm to 1,000 g/25 mm, (2'"'"') in the relation between the releasing force and the releasing rate after adhering to an adherend and preserving, the peak of the releasing force does not exist in the range of the releasing rate of not higher than 50 meters/minute, (3) the rolling initial tacking force is from 30 to 800 g/25 mm, and (4) the retentive force is at least 15 minutes under a load of 500 g. The pressure-sensitive adhesive and pressure-sensitive adhesive tape can be repeatedly adhered to or peeled from an adherend such as a paper diaper without breaking the adherend.

Claims

1. A re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive, which can be freely adhered to an adherend and can be repeatedly adhered and re-peeled without breaking the adherend, wherein said pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfies all the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 10 meters/minute to 100 meters/minute is from 50 g/25 mm to 1,000 g/25 mm,

(2) the difference between the maximum value and the minimum value of the releasing force of the releasing chart pattern (the graph showing the releasing force to the change of time) obtained by the release in (1) is not larger than 2/3 of the average releasing force or not larger than 500 g/25mm,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

2. The re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive of claim 1, wherein the maximum releasing force in the releasing rate of from 50 meters/minute to 100 meters/minute is not more than the breaking strength of an adherend.

3. A fastening system, wherein a re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive is re-peelably adhered to an adherend, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 10 meters/minute to 100 meters/minute is from 50 g/25 mm to 1,000 g/25 mm,

(2) the difference between the maximum value and the minimum value of the releasing force of the releasing chart pattern (the graph showing the releasing force to the change of time) obtained by the release in (1) is not larger than 2/3 of the average releasing force or not larger than 500 g/25 mm,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

4. The fastening system of claim 3, wherein the breaking strength of the adherend is from 0.02 kg/10 mm to 10 kg/10 mm.

5. A fastening system, wherein a pressure-sensitive adhesive tape or pressure-sensitive adhesive is used as a fixing tape for an absorptive article, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all of the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 10 meters/minute to 100 meters/minute is from 50 g/25 mm to 1,000 g/25 mm,

(2) the difference between the maximum value and the minimum value of the releasing force of the releasing chart pattern (the graph showing the releasing force to the change of time) obtained by the release in (1) is not larger than 2/3 of the average releasing force or not larger than 500 g/25 mm,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

6. A fastening system, wherein a pressure-sensitive adhesive tape or pressure-sensitive adhesive is used as a fixing tape for a packaged article, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all of the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 10 meters/minute to 100 meters/minute is from 50 g/25 mm to 1,000 g/25 mm,

(2) the difference between the maximum value and the minimum value of the releasing force of the releasing chart pattern (the graph showing the releasing force to the change of time) obtained by the release in (1) is not larger than 2/3 of the average releasing force or not larger than 500 g/25 mm,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

7. A re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive, which can be freely adhered to an adherend and can be repeatedly adhered and re-peeled without breaking the adherend, wherein said pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfies all the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is from 100 g/25 mm to 1,000 g/25 mm,

(2) in the relation between the releasing force and the releasing rate after adhering to an adherend and preserving, the peak of the releasing force does not exist in the range of the releasing rate of not higher than 50 meters/minute,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

8. The re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive of claim 7, wherein the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is at least 100 g/25 mm and the maximum releasing force is not more than the breaking strength of an adherend.

9. A fastening system, wherein a re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive re-peelably adheres to an adherend, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all of the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is from 100 g/25 mm to 1,000 g/25 mm,

(2) in the relation between the releasing force and the releasing rate after adhering to an adherend and preserving, the peak of the releasing force does not exist in the range of the releasing rate of not higher than 50 meters/minute,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

10. The fastening system of claim 9, wherein the breaking strength of the adherend is from 0.02 kg/10 mm to 10 kg/10 mm.

11. A fastening system, wherein a pressure-sensitive adhesive tape or pressure-sensitive adhesive is used as a fixing tape for an absorptive article, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all of the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is from 100 g/25 mm to 1,000 g/25 mm,

(2) in the relation between the releasing force and the releasing rate after adhering to an adherend and preserving, the peak of the releasing force does not exist in the range of the releasing rate of not higher than 50 meters/minute,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.

12. A fastening system, wherein a pressure-sensitive adhesive tape or pressure-sensitive adhesive is used as a fixing tape for a packaged article, said re-peeling pressure-sensitive adhesive tape or pressure-sensitive adhesive satisfying all the following conditions:

(1) the average releasing force in each releasing rate in the case of releasing at a releasing rate of from 1 meter/minute to 50 meters/minute is from 100 g/25 mm to 1,000 g/25 mm,

(2) in the relation between the releasing force and the releasing rate after adhering to an adherend and preserving, the peak of the releasing force does not exist in the range of the releasing rate of not higher than 50 meters/minute,

(3) the rolling initial tacking force is from 30 g/25 mm to 800 g/25 mm, and

(4) the retentive force is at least 15 minutes under a load of 500 g;

wherein the pressure-sensitive adhesive tape or pressure-sensitive adhesive contains an elastomer which is a block copolymer composed of a polymer block A mainly composed of a vinyl aromatic compound and a polymer block B mainly composed of a conjugated diene compound;

wherein the content of the polymer block A is at least 17% by weight and the coupling ratio is at least 50%; and

wherein the increase of the adhesive force after adhering to an adherend and preserving is not more than 4 times the initial adhesive force.