Packaging material, packaging bag, vacuum pack, method for preserving raw fish, and method for inspecting raw fish

The packaging material with a specific color difference and oxygen permeability maintains raw fish freshness and allows accurate K-value estimation, addressing spoilage and inspection challenges in conventional materials.

WO2026126969A1 Publication Date: 2026-06-18DAI NIPPON PRINTING CO LTD
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
DAI NIPPON PRINTING CO LTD
Filing Date
2025-12-08
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Conventional packaging materials for raw fish do not have excellent oxygen barrier properties, leading to spoilage and inaccurate K-value estimation due to color tone differences, which affects freshness maintenance and non-destructive inspection.

⚗Method used

A packaging material comprising a first substrate layer, a barrier layer, and a sealant layer, with specific color differences and oxygen permeability levels, to maintain freshness and allow accurate K-value estimation.

🎯Benefits of technology

Maintains raw fish freshness for 7 days and enables accurate K-value estimation without color tone interference, suitable for non-destructive inspection.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

A packaging material (2) according to the present disclosure comprises a first base material layer (3), a barrier layer (4), and a sealant layer (5) in the stated order, the packaging material (2) being characterized in that: the first base material layer (3) contains a polyester-based resin; the barrier layer (4) is a vapor-deposited film of a metal oxide; the sealant layer (5) contains a heat-sealable resin; in order that the color tone in a CIE 1976 color space, as calculated from a reflection spectrum measured in conformance with JIS Z 8722:2009 under a D65 light source and a viewing angle of 2°, is comparable to the color tone of a specific packaging film used in the prior art, the color difference ΔE*ab from the color tone of the specific prior-art film within a specific numeric range or the color difference ΔE*ab from the color tone of the D65 light source is 1.20-1.80; and the oxygen permeability measured in conformance with JIS K 7126-2:2006 is 1.5 mL / m2⋅day⋅MPa or lower.
Need to check novelty before this filing date? Find Prior Art