Swelling tape for filling gap

Patent metadata

Field	Value
Publication number	US-10115951-B2
Application number	US-201314435779-A
Country	US
Kind code	B2
Filing date	Nov 18, 2013
Priority date	Nov 16, 2012
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

The present application relates to a swelling tape and a method of filling a gap. The swelling tape is, for example, applied in gaps in which a fluid is present and deformed into a three-dimensional shape to fill the gaps and fix in place objects separated by gaps as needed.

First claim

The invention claimed is:

1. A swelling tape for filling a gap, comprising:
a substrate layer that is deformed in a length direction upon contact with a fluid;
a pressure-sensitive adhesive layer formed in a direction parallel to the length direction of the substrate layer on one surface of the substrate layer, and satisfying Equation 1; and
a back-side coating layer present on a surface opposite to the surface of the substrate layer on which the pressure-sensitive adhesive layer is formed,
wherein the substrate layer has a shore A hardness according to ASTM D2240 of 70 A or more, or the substrate layer has a shore D hardness according to JIS K-7311 of 40 D or more, wherein the recited hardnesses are maintained after the substrate is in contact with the fluid,
wherein the back-side coating layer comprises at least one selected from the group consisting of a fluorine-based releasing agent, a silicon-based releasing agent, a releasing agent containing silicon and having a vinyl or acrylic group, and an amide-based releasing agent:
1.5≤ X 2 /X 1 ≤150  [Equation 1]

where X 1 is a peeling strength of the pressure-sensitive adhesive layer measured at room temperature, and at a peeling rate of 5 mm/sec and a peeling angle of 180 degrees with respect to the surface opposite to the surface of the substrate layer on which the pressure-sensitive adhesive layer is formed, and X 2 is a peeling strength measured with respect to glass at room temperature and at a peeling rate of 5 mm/sec and a peeling angle of 180 degrees,
wherein the X 1 is 20 gf/25 mm or less.

2. The swelling tape for filling a gap of claim 1 , wherein the swelling tape is deformed into a three-dimensional shape having a height of 0.001 mm to 2.00 mm in a direction perpendicular to the length direction of the substrate layer upon contact with the fluid.

3. The swelling tape for filling a gap of claim 1 , wherein the substrate layer has a deformation ratio in the length direction according to Equation 2 of 10% or more:
Deformation ratio in length direction=( L 2 −L 1 )/ L 1 ×100  [Equation 2]

where L 1 is an initial length before the substrate layer is in contact with the fluid, and L 2 is a length of the substrate layer measured at room temperature or 60° C. after the substrate layer has been in contact with the fluid for 24 hours.

4. The swelling tape for filling a gap of claim 1 , wherein the substrate layer comprises thermoplastic polyurethane.

5. The swelling tape for filling a gap of claim 1 , wherein the pressure-sensitive adhesive layer comprises an acrylic pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, an epoxy pressure-sensitive adhesive, a silicon pressure-sensitive adhesive, or a rubber pressure-sensitive adhesive.

6. The swelling tape for filling a gap of claim 1 , wherein the pressure-sensitive adhesive layer comprises an acrylic polymer crosslinked with a multifunctional crosslinking agent.

7. The swelling tape for filling a gap of claim 1 , wherein the pressure-sensitive adhesive layer is attached to and wound around the surface opposite to the surface of the substrate layer on which the pressure-sensitive adhesive layer is formed.

8. The swelling tape for filling a gap of claim 1 , wherein the X 2 is 100 gf/25 mm or more.

9. A method of filling a gap formed between a first substrate and a second substrate spaced apart from the first substrate, comprising:
attaching the pressure-sensitive adhesive layer of the swelling tape of claim 1 to the first or second substrate; and
contacting the substrate layer of the swelling tape of claim 1 with a fluid.

10. The method of filling a gap of claim 9 , wherein either one of the first and second substrates is an electrode assembly, and the other is a can encasing the assembly.

11. An electrode assembly having a circumferential surface to which the swelling tape of claim 1 is attached.

12. A battery, comprising:
the electrode assembly of claim 11 ;
a can encasing the assembly; and
an electrolyte in contact with the assembly in the can.

13. The battery of claim 12 , wherein the swelling tape of the electrode assembly fixes the assembly to an inside of the can by deforming into a three-dimensional shape upon contact with the electrolyte.

14. The battery of claim 13 , wherein the electrolyte is a carbonate-based electrolyte.

Assignees

• Lg Chemical Ltd

Inventors

• Hwang Ji Young
• Jung Byung Kyu
• Hwang Yoon Tae
• Yang Se Woo
• Chang Suk Ky
• Kim Sung Jong
• Park Min Soo
• Ku Cha Hun

Classifications

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M50/477

  characterised by their shape · CPC title

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M50/486

  Organic material · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title