Thermal insulation foam and barrier coated paper

A resin foam with a barrier-coated paper using a polyvinyl alcohol-based resin maintains thermal insulation by preventing gas replacement, addressing the degradation issue in existing resin foams and ensuring long-term performance and ease of handling.

JP2026109175APending Publication Date: 2026-07-01NIPPON PAPER IND CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
NIPPON PAPER IND CO LTD
Filing Date
2024-12-19
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Resin foams used as heat-insulating materials experience a decrease in thermal insulation performance over time due to gas replacement by air, and existing solutions like plastic films and metal foils do not adequately address this issue.

Method used

A resin foam with independent bubbles and a barrier-coated paper comprising a paper substrate and a gas barrier coating layer containing a polyvinyl alcohol-based resin, with specific tensile strength and basis weight, is used to prevent gas replacement, enhancing thermal insulation and handling properties.

Benefits of technology

The barrier-coated paper maintains thermal insulation performance over time by preventing gas replacement and provides easy handling during installation, with covalent bonds between the paper and resin foam reducing gap formation.

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Abstract

To provide a novel thermal insulation foam and a barrier coating paper used for forming the thermal insulation foam. [Solution] The invention comprises a resin foam having closed cells and a barrier coated paper provided on at least one surface of the resin foam, wherein the barrier coated paper comprises a paper substrate and a gas barrier coating layer containing a polyvinyl alcohol-based resin, and the barrier coated paper has a nitrogen permeability of 10 cm 3 / m 2 The humidity is 24hr·atm or less, and the paper substrate has a tensile strength of 4.9kN / m or more in the MD direction and a basis weight of 150g / m². 2 The following is a gas barrier coating layer in contact with a heat insulating foam, and a barrier coating paper provided on the heat insulating foam.
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