Manufacture and performance of new structural shet material LVB made from small sized veneers

在日本，要求用国内人工林木材的低档成分生产一些新的结构板材。LVB是由长度和宽度均为45~90 cm的小尺寸单板组成的LVB，被认为是劳安胶合板的替代品之一。试验结果总结如下：1直播的MOE与劳安胶合板基本相同。2单板的端接对产品的MOE没有影响。3 Hinoki LVB的MOE和MOR都比Sugi LVB大。4 Hinoki LVB 13.7 mm厚一点也不比12.5 mm Lauan胶合板差，在集中载荷下的弯曲性能好于15 mm刨花板。安装机器人布置小单板可以实现生产线的全自动化。一般来说，LVB可以用国内种植的软木高效制造，并被证明有足够的强度。

In Japan, it is required to produce some new structural sheet materials from low grade components of the domestic plantation timbers. LVB (laminated veneer board) which is composed of small sized veneers such as 45-90cm both in length and width has been considered as one of the substitutes for lauan plywood.The strength properties of HINOKI (Japanese cypress) and SUGI (Cryptomeria) LVB were investigated. Tests results are summarized as follows;1 The MOE of LVB is almost the same as that of lauan plywood.2 There is no effecto of the end joints of the veneers on the MOE of the products.3 Both the MOE and the MOR of HINOKI LVB are larger than those of SUGI LVB.4 HINOKI LVB 13.7mm thick is not at all inferior to 12.5mm lauan plywood, and is for better than 15mm particleboard in bending performance under a concentrated load.It is possible to fully automate the processing line by fitting it with robots for arranging the small veneers.Generally, LVB can be manufactured from the domestic grown soft-woods efficiently and was found to have sufficient strength.