Laminates, packaging
The laminate with a paper base layer, sealant layer, and adhesive layer, featuring specific tensile elongation ratios and tear strengths, addresses the challenge of curved cuts in paper packaging, enabling easy straight-line cutting and opening.
JP7764728B2Active Publication Date: 2025-11-06DAI NIPPON PRINTING CO LTD
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Patent Information
- Application Number
- JP2021175840
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-10-27
- Publication Date
- 2025-11-06
- Estimated Expiration
- 2041-10-27
AI Technical Summary
Technical Problem
Paper packaging is difficult to open due to curved cuts and fuzzing at the cut mark, making it challenging to achieve straight-line cutting.
Method used
A laminate comprising a paper base layer, a sealant layer, and an adhesive layer, with specific tensile elongation ratios and tear strengths in orthogonal directions, ensuring the laminate can be easily cut in a straight line.
Benefits of technology
The laminate provides good straight-cutting properties, allowing easy opening of packages without fuzzing, even when made of paper.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a laminate and a package excellent in rectilinear propagation cut properties even when paper is used therein.SOLUTION: A laminate 10 includes: a paper substrate layer 11; a sealant layer 12; and an adhesive layer 14 disposed between the paper substrate layer 11 and the sealant layer 12. A relation of 0.8≤R≤5.0 is satisfied if a first direction is a presumable cut direction in an in-plane direction of the paper substrate layer 11, a second direction is a direction orthogonal to the first direction, R1 is a tensile elongation (%) of a single body of the paper substrate layer 11 in the first direction, R2 is a tensile elongation (%) of a single body of the paper substrate layer 11 in the second direction, and R=R1 / R2.SELECTED DRAWING: Figure 1
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