Battery Packaging Labels

• US 20090041992A1
• Filed: 06/15/2005
• Published: 02/12/2009
• Est. Priority Date: 06/15/2005
• Status: Abandoned Application

• Current Assignee: Fuji SEAL International Incorporated
• Original Assignee: Fuji SEAL International Incorporated
• Inventors: Umeda, Takako, Kakura, Yoshikazu, Kanemitsu, Hiroki
• Application Number:
  US11/922,246
• Publication Number:
  US 20090041992A1
• Time in Patent Office: Days
• US Class Current: 428/200
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C09J 2203/334 as a label
• CPC Class Codes: C09J 2301/162 the carrier being a laminate constituted by plastic layers only
• CPC Class Codes: C09J 2423/00 Presence of polyolefin
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: C09J 7/35 Heat-activated
• CPC Class Codes: G09F 3/10 by an adhesive layer
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 428/24843 with heat sealable or heat releasable adhesive layer

Abstract

Disclosed is a label 1 for battery packaging, which includes a heat shrinkable film 2, and a printed layer 3 and an adhesive layer 4 each arranged on or above the heat shrinkable film 2. The adhesive layer 4 includes an emulsive heat-sensitive adhesive containing an ethylene polymer and 10 to 30 percent by weight of a tackifier based on the total solid content. The ethylene copolymer has an ethylene content of 66 to 84 percent by weight and a melting point of 60° C. to 90° C. The heat shrinkable film 2 is preferably a film having a percentage of heat shrinkage in a main stretching direction of 10% or more after being immersed in a glycerol bath at 100° C. for five seconds. The label 1 for battery packaging excels in low-temperature tack and blocking resistance and is less likely to deteriorate with time.

Claims

1. :

A label for battery packaging, comprising a heat shrinkable film, an adhesive layer and a printed layer, the adhesive layer and the printed layer each arranged on or above the heat shrinkable film,

wherein the adhesive layer includes an emulsive heat-sensitive adhesive containing;

an ethylene copolymer having an ethylene content of 66 to 84 percent by weight and a melting point of 60°

C. to 90°

C.; and

a tackifier having 10 to 30 percent by weight based on a total solid content of the emulsive heat-sensitive adhesive.

2. :

A label for battery packaging, according to claim 1,

wherein the heat shrinkable film has a percentage of heat shrinkage in a main stretching direction of 10% or more as determined after being immersed in a glycerol bath at 110°

C. for five seconds.

3. :

A label for battery packaging, according to claim 1,

wherein the heat shrinkable film further has a percentage of heat shrinkage in the main stretching direction of 10% or less as determined after being immersed in a glycerol bath at 90°

C. for five seconds and a percentage of heat shrinkage in the main stretching direction of 30% or more as determined after being immersed in a glycerol bath at 140°

C. for five seconds.

4. :

A label for battery packaging, according to claim 1, wherein the adhesive layer has an activation temperature lower than a shrinkage starting temperature of the heat shrinkable film by 10°

C. or more.

5. :

A label for battery packaging, according to claim 1, wherein the ethylene copolymer is an ethylene-vinyl acetate copolymer having a melt flow rate (MFR) of 150 to 450 g/10 minutes.

6. :

A label for battery packaging, according to claim 2,

wherein the heat shrinkable film further has a percentage of heat shrinkage in the main stretching direction of 10% or less as determined after being immersed in a glycerol bath at 90°

C. for five seconds and a percentage of heat shrinkage in the main stretching direction of 30% or more as determined after being immersed in a glycerol bath at 140°

C. for five seconds.