The invention discloses a multi-layer structure
medicinal herb fiber environment-friendly plate and a preparation method thereof, and relates to the technical field of environment-friendly composite materials, the multi-layer structure
medicinal herb fiber environment-friendly plate comprises an upper layer panel, a middle functional sandwich layer and a lower layer bottom plate; each of the upper-layer panel and the lower-layer bottom plate takes
bark fibers as a framework and wormwood
straw powder and medicinal
plant straw powder as main fillers, and the frameworks and the main fillers are bonded through an environment-friendly
adhesive and then are subjected to
hot press molding; the middle functional sandwich layer comprises the following components: 65 wt% of moxa residues, 10 wt% of
hedera helix powder, 11 wt% of mixed powder of peach branches and
acorus calamus leaves, 8 wt% of
eucalyptus and paper tree
bark powder, 6 wt% of bamboo powder and
fiber cloth embedded in the middle functional sandwich layer; the environment-friendly
adhesive is selected from polymerized MDI glue or
biomass-based glue, and the dosage of the environment-friendly
adhesive is 8-12% of the total dry material
mass in the upper-layer panel, the lower-layer bottom plate and the middle functional sandwich layer; the
total thickness of the upper-layer panel and the lower-layer bottom plate accounts for 65% of the overall thickness of the plate, and the thickness of the middle functional sandwich layer accounts for 35% of the overall thickness of the plate; and the length of the
bark fiber is 15-20 mm.