Packaging sheet for microwave oven

By applying a water-based ionic resin coating with high heat sealing strength and high heat clamping strength to the paper-based material, the problems of poor shape retention and unreduced plastic usage after heating are solved, and the dual effects of shape retention and plastic reduction are achieved.

JP2025038803APending Publication Date: 2025-03-19HOKUETSU CORP
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Patent Information

Application Number
JP2023145631
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-07
Publication Date
2025-03-19

AI Technical Summary

Technical Problem

The existing microwave wrapping paper has poor shape after heating, and the amount of plastic used has not been effectively reduced, resulting in environmental pollution.

Method used

A paper-based material with an ash content of 0-10%, and one or more heat sealing layers are coated on the surface, which contains a water-based ionic resin coating with high heat sealing strength and high heat clamping strength to ensure that the shape remains and avoids combustion after microwave heating.

Benefits of technology

It realizes microwave wrapping paper that retains good shape after microwave heating, and effectively reduces the use of plastic and reduces pollution to the natural environment.

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Abstract

To provide a packaging sheet for a microwave oven which uses a reduced amount of plastic and has excellent container shape retention.SOLUTION: A packaging sheet for a microwave oven has at least one or more heat seal layers on at least one side of a paper base material, the paper base material having an ash content of 0 to 10% according to JIS P 8251:2003, and the heat seal layer having a hot tack strength of 1.5 N / 15 mm or more under the following test conditions. (Hot tack strength test conditions) Bonding surfaces: Heat seal layers, Heat seal temperature: 180°C (both sides), Heat seal pressure: 0.2 MPa, Heat seal time: 0.5 seconds, Time from end of heat seal to start of peeling: 0.5 seconds, Peeling speed: 1,500 mm / min.SELECTED DRAWING: None
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