METHOD FOR PRODUCING TERMINAL BONDING TAPE, AND TERMINAL BONDING TAPE

• US 20130130007A1
• Filed: 02/04/2013
• Published: 05/23/2013
• Est. Priority Date: 08/11/2010
• Status: Abandoned Application

• Current Assignee: Okura Industrial Company Limited
• Original Assignee: Okura Industrial Company Limited
• Inventors: ORIHARA, Masanao, SONODA, Kazutaka, TAKEBAYASHI, Kenzo
• Application Number:
  US13/758,214
• Publication Number:
  US 20130130007A1
• Time in Patent Office: Days
• US Class Current: 428/218
• CPC Class Codes: B32B 27/16 specially treated, e.g. irradiated
• CPC Class Codes: B32B 37/06 characterised by the heating method
• CPC Class Codes: H01G 11/74 Terminals, e.g. extensions of current collectors
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01M 50/178 for pouch or flexible bag cells
• CPC Class Codes: H01M 50/548 on opposite sides of the cell
• CPC Class Codes: H01M 50/557 Plate-shaped terminals
• CPC Class Codes: H01M 50/562 characterised by the material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10T 428/24992 Density or compression of components

Abstract

A method for producing a terminal bonding tape includes providing a multi-layer film having a linear polyethylene surface layer, a linear polyethylene intermediate layer and an acid-modified polyethylene surface layer, and irradiating the multi-layer film with a radiation beam from the side of the linear polyethylene surface layer to cross-link the linear polyethylene intermediate layer. The linear polyethylene surface layer is made of a high-fluidity linear low-density polyethylene having an MFR of 5 to 30 g/10 min or a linear polyethylene with a density of 918 to 940 kg/m³, while the linear polyethylene intermediate layer is made of a low-fluidity linear low-density polyethylene having an MFR of 0.7 to 6 g/10 min or a linear polyethylene with a density of 865 to 917 kg/m³. The radiation cross-linked intermediate layer shows significant reduction in fluidity with the fluidity of the both surface layers being maintained in an acceptable level.

Claims

1. A method for producing a terminal bonding tape, comprising

providing a multi-layer film comprising a first surface layer of a first linear polyethylene, a second surface layer of an acid-modified polyethylene, and an intermediate layer of a second linear polyethylene interposed between the first and second surface layers, and

irradiating the multi-layer film with a radiation beam from the side of the first linear polyethylene layer to cross-link the second linear polyethylene

wherein the first linear polyethylene is selected from the group consisting of (a) a high-fluidity linear low-density polyethylene having an MFR of not lower than 5 g/10 min and not higher than 30 g/10 min and (b) a linear polyethylene with a density of 918 to 940 kg/m³, and the second linear polyethylene is selected from the group consisting of (a′

) a low-fluidity linear low-density polyethylene having an MFR which is lower than that of the high-fluidity linear low-density polyethylene and which is in the range of not lower than 0.7 g/10 min and not higher than 6 g/10 min and (b′

) a linear polyethylene layer with a density of 865 to 917 kg/m³, with the proviso that when the first linear polyethylene is (a), the second linear polyethylene is (a′

) and when the first linear polyethylene is (b), the second linear polyethylene is (b′

).

2. The method according to claim 1, wherein a difference in MFR between the high-fluidity linear low-density polyethylene and the low-fluidity linear low-density polyethylene is at least 1.0 g/10 min.

3. The method according to claim 1, wherein a difference in density between the linear polyethylene layer with a density of 918 to 940 kg/m³ and the linear polyethylene layer with a density of 865 to 917 kg/m³ is at least 10 kg/m³.

4. The method according to claim 1, wherein the radiation beam is an electron beam.

5. The method according to claim 1, wherein the multi-layer film has a thickness of 50 to 300 μ

m.

6. The method according to claim 1, wherein each of the first surface layer, second surface layer and intermediate layer has a thickness of 10 to 100 μ

m.

7. A terminal bonding tape produced by the method according to claim 1.