Your search resulted in 5 documents.
Penetration pathway of oilborne preservative in heartwood of Japanese larch (Larix kaempferi)
2019 - IRG/WP 19-40886
The liquid permeability of Japanese larch (Larix kaempferi) wood is extremely low, especially in the heartwood. It is difficult to achieve the penetration of wood preservatives, which is specified by standards, with pressure treatment of waterborne preservatives. Recently, the protection treatment with an oilborne preservative called “deeper penetration treatment” is commercially available, wh...
H Shibui, T Miyauchi, T Shigeyama, M Ikeda, Y Sugai
Development of software to automate the quantification of the extent of penetration of treated wood
2021 - IRG/WP 21-20678
In Japan, Japanese Agricultural Standard (JAS) by the Ministry of Agriculture, Forestry and Fisheries and Approved Quality (AQ) by the Japan Housing and Wood Technology Center have established the penetration standard for treated wood. In our company, we measure the degree of penetration by either visual assessment or image processing. In the visual assessment, the degree of penetration is determi...
Y Susa, D Watanabe, T Shigeyama, Y Sugai
Preliminary investigation for preservation method of CLT using non-pressure treatment
2021 - IRG/WP 21-40919
Cross-laminated Timber (CLT) is increasingly being used in residential and non-residential construction around the world, and some of these areas are at high risk of biodeterioration. Addition to moisture management of construction, preservative treatment of CLT may be needed to prevent decay and termite attack in the area. Pressure treatment being most reliable, is not feasible due to the large d...
T Miyauchi, Y Ohashi, J Miyazaki, R Takanashi, H Shibui, S Isaji, T Shigeyama, Y Sugai, A Yamamoto, T Hramiishi, T Mori, H Matsunaga
Evaluation of 'Deep Penetration Treatment' for wood preservation
2025 - IRG/WP 25-20746
‘Deep Penetration Treatment’ (DPT) is a recently developed wood preservation technique in Japan designed to meet the preservation standards required for residential foundations. This method involves spraying a specially formulated solvent-borne wood preservative onto properly incised dried lumber. Despite being a non-pressure treatment, DPT achieves penetration levels comparable to conventiona...
M Ikeda, T Shigeyama, Y Sugai
Durability evaluation of outdoor-exposed CLT treated with various wood presevatives using CT scans
2025 - IRG/WP 25-41035
Methods for wood preservation treatment of large materials such as Cross Laminated Timber (CLT) are limited. It is unclear which wood preservation treatment methods can effectively protect CLT from rot risk. In this study, accelerated rot tests (fungus cellar test) of CLT treated with the solvent-borne wood preservative by non-pressure treatment, named ‘deep penetration treatment’, were conduc...
Y Sakurai, T Shigeyama, Y Sugai