Composite flexible film laminate

• US 4,287,274 A
• Filed: 09/26/1979
• Issued: 09/01/1981
• Est. Priority Date: 10/03/1978
• Status: Expired due to Term

• Current Assignee: Pakcel Converters Limited
• Original Assignee: Pakcel Converters Limited
• Inventors: Smith, John C., Frodsham, Colin, Ibbotson, Peter
• Primary Examiner(s): McCamish, Marion
• Assistant Examiner(s): Buffalow, E. Rollins
• Application Number:
  US06/079,061
• Time in Patent Office: 706 Days
• Field of Search: 428/480, 428/458, 428/423.7, 428/425.5, 428/452, 428/425.1, 428/425.8, 428/343, 428/344, 428/347, 429/167, 429/156
• US Class Current: 429/156
• CPC Class Codes: C09J 7/35 Heat-activated
• CPC Class Codes: H01M 50/117 Inorganic material
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/128 with two or more layers of only inorganic material
• CPC Class Codes: H01M 50/129 with two or more layers of only organic material
• CPC Class Codes: H01M 50/136 Flexibility or foldability
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/31565 Next to polyester [polyethylene terephthalate, etc.]
• CPC Class Codes: Y10T 428/31591 Next to cellulosic
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer
• CPC Class Codes: Y10T 428/31605 Next to free metal
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A flexible film laminate, according to the invention, can be applied directly to the cardboard tubing of dry cell batteries during the manufacture of same.

In a preferred arrangement the laminate comprises, a first layer of a plastics film 1, a second layer of discrete areas of colored pigments 2, a third layer of adhesive 3, a fourth layer of a metallic deposit 4 on the surface of a fifth layer, said fifth layer of a plastics material 5, a sixth layer of adhesive 6, a layer of finely divided clay mineral particles 7, a layer of bleached kraft paper 8 and a final layer of uncured heat sensitive adhesive 9.

Claims

1. A laminate film comprising a first layer of a plastics material, a second layer of discrete areas of coloured pigments, a third layer of adhesive, a fourth layer of a metallic deposit on the surface of a fifth layer, said fifth layer being of a plastics material, a sixth layer of adhesive, a seventh layer of a clay based coating on an eighth layer, said eighth layer being paper and a ninth layer of uncured adhesive.

2. A laminate film according to claim 1 wherein the first and fifth layers of plastic material are polyethylene terephthalate film.

3. A laminate film according to claim 1 wherein the second layer is a printing ink system comprising a polyester resin base with coloured pigments dispersed therein.

4. A laminate film according to claim 1 wherein the coloured pigments are rendered into a graphical design.

5. A laminate film according to claim 1 wherein the third and sixth layers are both hydroxyl-isocyanate polyurethane curing adhesives.

6. A laminate film according to claim 1 wherein the metallic deposit is of aluminium.

7. A laminate film according to claim 1 wherein the clay based coating is a finely divided dispersion of clay minerals which is applied to the surface of the paper then dried and smoothed.

8. A laminate film according to claim 1 wherein the paper is bleached kraft paper.

9. A laminate film according to claim 1 wherein the uncured adhesive is heat sensitive and contains ethylene vinyl acetate.

10. A dry cell or battery of dry cells incorporating as the casing thereof a laminate film according to claim 1.