Title:
MANUFACTURE OF COLLECTED PULPWOOD FOR PLYWOOD
Document Type and Number:
Japanese Patent JP3089111
Kind Code:
B2
Abstract:
PURPOSE: To attempt effective use of wood resources as well as elimination or reduction of labor and economizing of energy in manufacture of plywood by providing an industrially useful method for collecting a plurality of pieces of small diameter wood to make a large diameter.
CONSTITUTION: Collected pulpwood for plywood is manufactured as follows; a moisture setting isocyanate adhesive of 1.0-25.0wt.% isocyanate content is applied to a surface of a plurality of pieces of small diameter wood 2 treated by softening with steam at 80-100°C; after casting into a compression treating machine 3, they are compressed so that compressibility of the small diameter wood 2 (total in sectional area of the small diameter wood after compaction ÷total in sectional area of the small diameter wood before compaction μ100) becomes 60-70%; a plurality of pieces of the small diameter wood 2 are bonded with each other to be integrated and besides, a moisture content in the small diameter wood 2 is uniformalized; after the adhesive has been thoroughly hardened as they are compacted, their deformation is fixing processed for 10min or longer again with steam at 80-100°C.
Inventors:
Hirotatsu Oshima
Application Number:
JP21841292A
Publication Date:
September 18, 2000
Filing Date:
July 23, 1992
Export Citation:
Assignee:
Okura Industry Co., Ltd.
International Classes:
B27L5/00; B27K5/00; B27M3/00; (IPC1-7): B27M3/00; B27K5/00; B27L5/00
Domestic Patent References:
| JP5670902A | ||||
| JP5089508A | ||||
| JP44B2 |