52 results about "Green wood" patented technology

In a method for determining the dry mechanical strength for a green wood, the improvement comprising: (a) illuminating a surface of the wood to be determined with a reduced range of wavelengths in the VIS-NIR spectra 400 to 1150 nm, said wood having a green moisture content; (b) analyzing the surface of the wood using a spectrometric method, the method generating a first spectral data of a reduced range of wavelengths in VIS-NIR spectra; and (c) using a multivariate analysis technique to predict the mechanical strength of green wood when dry by comparing the first spectral data with a calibration model, the calibration model comprising a second spectrometric method of spectral data of a reduced range of wavelengths in VIS-NIR spectra obtained from a reference wood having a green moisture content, the second spectral being correlated with a known mechanical strength analytical result obtained from the reference wood when dried and a having a dry moisture content.

The invention relates to a rapid drying method for a cottonwood thick plate, and the method comprises the following steps of: at a preprocessing stage of a cottonwood, sawing the cottonwood to be plates with certain length and thickness according to operating requirements, stacking the plates and placing the plates into preprocessing equipment, then carrying out superheated steam preprocessing, and drying the preprocessed plates according to strengthening benchmark. In the rapid drying method, at the preprocessing stage of the cottonwood, constant-pressure superheated steam with temperatures of 110 DEG C-160 DEG C is used as a processing medium, therefore, not only can smooth and zero-defect of plate surfaces of the processed cottonwood be achieved, but also growth stress of the cottonwood can be released, a water passage inside a wood is opened, initial water ratio of the plates can be substantially reduced. A green wood is preprocessed, water ratio descending ratio is 40%-80%, descending mean value of the water ratio is above 60%,so that a drying stage time in a later period of the cottonwood can be greatly shortened. Compare with the conventional drying method, drying cycle is shortened above one half, energy sources are saved, drying cost is reduced, drying quality is favorable, and the rapid drying method is particularly applicable to cottonwood plates with thickness more than 5.0cm.

The invention relates to the field of environment-friendly composite materials, in particular to a biomass environment-friendly wood-replacing board. The biomass environment-friendly wood-replacing board is mainly made of natural fibers, the natural fibers and polymer resin are mixed and combined through a modifying agent, a solubilizer and other auxiliaries, a small amount of rubber powder is mainly added, a balance sea island structure phase diagram in a sub-micro phase state is formed by the whole system of the materials, a micro network structure is formed through interweaving, and the key technical problem that traditional similar materials are poor in tenacity and poor in nail holding ability is effectively solved. The manufactured biomass environment-friendly wood-replacing board has the advantages of being stable in dimension, resistant to abrasion and corrosion, capable of being nailed, sawed and riveted, waterproof, capable of preventing termites and being widely used, and the like.