Airtight material and method for airtight construction of building

The airtight material with an expandable balloon and frame system simplifies the formation of airtight lines in buildings, addressing labor-intensive and time-consuming issues in existing methods by providing a quick and effective sealing solution.

WO2026115783A1PCT designated stage Publication Date: 2026-06-04SEKISUI HOUSE KK
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SEKISUI HOUSE KK
Filing Date
2025-06-18
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing airtight construction methods for buildings face challenges in forming seamless airtight lines around irregularly shaped protruding members, require significant labor, and are time-consuming due to the difficulty in ensuring adhesion and controlling the expansion of injection-type foam materials.

Method used

An airtight material comprising a bag-shaped body made of an elastic material, a balloon inside that expands with gas, and a frame that maintains the expanded shape, along with a belt that bursts to seal gaps, allowing for easy installation and quick formation of airtight lines.

Benefits of technology

Enables the formation of airtight lines without excessive labor, reducing construction time and ensuring consistent quality regardless of installer skill level.

✦ Generated by Eureka AI based on patent content.

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  • Figure JP2025022031_04062026_PF_FP_ABST
    Figure JP2025022031_04062026_PF_FP_ABST
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Abstract

An airtight material (1) comprises, inside a bag-shaped airtight material body (2) that can freely expand and contract in the length direction and the radial direction, a balloon that expands by being inflated by being filled with a gas to expand the airtight material body fThis airtight material (1) comprises, inside a bag-shaped airtight material body (2) that can freely expand and contract in the length direction and the radial direction, a balloon that is inflated by filling with gas to cause the airtight material body to expand from the inside, and an expandable frame. rom the inside, and an expandable frame. The balloon comprises a gas sealing port (31). The sealing port (31) passes through the airtight material body (2) and is led to the outside. The frame is externally mounted on the balloon, expands by means of the inflating balloon, can hold the expanded shape, and holds the shape of the airtight material body (2) after expansion from the inside.
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Citation Information

Patent Citations

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