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Title:
PANEL FOR CONCRETE FORMWORK
Document Type and Number:
WIPO Patent Application WO/2023/017770
Kind Code:
A1
Abstract:
[Problem] To provide a panel for concrete formwork which has excellent surface smoothness and abrasion resistance, and which can be repeatedly used. Specifically, the purpose of the present invention is to provide a panel for concrete formwork with which it is possible to obtain concrete with a smooth finished surface, and which can be repeatedly used because the surface of the panel for concrete formwork is less likely to be damaged by work such as removing concrete adhering to the surface with a spatula. [Solution] A panel for concrete formwork comprising a wooden composite board consisting of a plywood board and a wooden fiber board, and a resin sheet layered on a surface of the wooden composite board on the wooden fiber board side. The panel for concrete formwork is characterized in that the abrasion loss per unit abrasion area of the abrasion loss (mass obtained by subtracting the mass of a test piece after 500 rotations from the mass of the test piece before 500 rotations) measured in conformity to JAS 1073 Abrasion A Test on the surface side of the resin sheet is less than or equal to 1.000 g/m2. The panel for concrete formwork is further characterized in that the pencil hardness measured in conformity to JIS K5600-5-4 on the surface side of the resin sheet is greater than or equal to H.

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Inventors:
KAGAWA SEIZO (JP)
TAKESHITA KOZO (JP)
TANIWAKI HIROSHI (JP)
Application Number:
PCT/JP2022/029886
Publication Date:
February 16, 2023
Filing Date:
August 04, 2022
Export Citation:
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Assignee:
OKURA INDUSTRIAL CO LTD (JP)
International Classes:
E04G9/10
Domestic Patent References:
WO2016047500A12016-03-31
WO2008155244A22008-12-24
Foreign References:
JPS60184166A1985-09-19
JPH11129211A1999-05-18
JPH08192419A1996-07-30
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