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Title:
FIREPROOFING CHEMICAL-CONTAINING WOOD MATERIAL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/079950
Kind Code:
A1
Abstract:
The present invention improves the reliability of fire-resistance performance, and suppresses a drop in strength and a drop in Young's modulus for bending, with regard to a structural LVL containing a fireproofing chemical for fire-resistant structural wood material-use. The present invention is the LVL 61 for structural use comprising a plurality of raw material veneers 51 layered in the front-back thickness direction via adhesive layers therebetween. Each of the raw material veneers 51 is a wood material having a fireproofing chemical injected to the interior thereof, and is constituted from a site of sapwood part alone, a site of heartwood part alone, or, a site wherein a sapwood part and a heartwood part are mixed. Injection holes 62 are provided, each having a circular cross section and extending in the thickness direction from each of the front surface and the back surface of the LVL 61. The injection holes 62 traverse through the plurality of raw material veneers 51 and the adhesive layers. On the front surface and on the back surface, respectively, a plurality of the injection holes 62 are aligned while leaving an interval therebetween in the width direction and in the length direction of the LVL 61. The injection holes 61(U) from the front surface and the injection holes 61(D) from the back surface are disposed at different positions from one another in the width direction and in the length direction.

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Inventors:
YOKOO KUNIHARU (JP)
Application Number:
PCT/JP2021/024204
Publication Date:
April 21, 2022
Filing Date:
June 25, 2021
Export Citation:
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Assignee:
UNI WOOD CORP CO LTD (JP)
International Classes:
B27K3/02; B27D1/04; B27M1/00; B32B21/14
Foreign References:
JPH0970803A1997-03-18
JPS5474779U1979-05-28
US5411066A1995-05-02
US20110274872A12011-11-10
JP2020059126A2020-04-16
JP2019531209A2019-10-31
JP2018089967A2018-06-14
JP2002120204A2002-04-23
JPS60105501A1985-06-11
JP2018A
JP226298A
JP4221599B22009-02-12
JP2007063749A2007-03-15
JP3344703B22002-11-18
JPH10131635A1998-05-19
JPH08281203A1996-10-29
JP2020089978A2020-06-11
Attorney, Agent or Firm:
SAMEJIMA Takenobu (JP)
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