Weather-resistant artificial bamboo and wooden board and manufacturing method thereof
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A manufacturing method and technology for wood-based panels, which are used in manufacturing tools, bonding of wooden veneers, and impregnating wood, etc., can solve the problem of little application of wood materials, and achieve the effect of preventing the aging process of surface ultraviolet rays.
Inactive Publication Date: 2014-02-05
浙江省林产品质量检测站
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[0003] At present, photoaging research is mainly concentrated in the fields of plastics, r
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Embodiment 1
[0021] Low-molecular phenolic resin (molecular weight: 500-800, viscosity: 15mPas, solid content 38%, concentration diluted to 30% for use), add 2% o-hydroxybenzophenone ultraviolet absorber, 1% free radical scavenger , stir and mix evenly, under normal temperature and pressure, put bamboo fiberized veneer, take it out after soaking for 4-6h, and dry to moisture content of 8-11%. 16%, dried to 8-11% moisture content, billet assembly, hot pressing (hot pressing pressure: 3.5-5.0MPa hot pressing temperature 150-165°C, holding time 30-40min, cooling time 20-35min,), unloading , Trim the edge, and get the finished product.
Embodiment 2
[0023] In the modified urea-formaldehyde resin (viscosity: 30mPas, solid content 35%), add 0.8% o-hydroxybenzophenone ultraviolet absorber, 1% free radical scavengers and 0.5% paraffin, stir and mix evenly. Under normal temperature and pressure, put poplar veneer, soak for 2-4 hours, dry to 7-10% moisture content, dry poplar veneer in the middle layer to 7-10% moisture content, apply glue (glue amount 250- 350g / m 2 ), forming blanks, aging, hot pressing (hot pressing pressure: 0.8-1.2MPa, hot pressing temperature 110-115°C, holding time 10-15min), plate unloading, edge trimming, and finished products.
[0024] Table 1 Physical and mechanical properties of weather-resistant recombined bamboo (density: 1.15g / cm 3 )
[0025]
[0026] Table 2 Physical and mechanical properties of weather-resistant recombined bamboo (density: 1.15g / cm 3 )
[0027]
[0028] In summary, as shown in Table 1 and Table 2, the present invention can prevent or slow down the aging process of wood...
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Abstract
The invention discloses a weather-resistant artificial bamboo and wooden board and a manufacturing method thereof. The method comprises the following steps of mixing and dissolving 0.5 to 1.5 percent of a ultraviolet absorber and 0.8 to 2.0 percent of a free radical capturer by a small amount of distilled water, adding low-molecular-weight phenolic resin according to a ratio, and stirring and uniformly mixing the phenolic resin with a mixture of the ultraviolet absorber and the free radical capturer to obtain a solvent A; placing an artificial board surface layer material into the solvent A, completely soaking for 2h to 6h under the normal temperature and the normal pressure, and drying the soaked artificial board surface layer material under the normal temperature until the moisture content is 7 to 11 percent; assembling the artificial board surface layer obtained in step 2 and an artificial board base layer blank, thermally rolling, disassembling, and trimming to obtain a finished product. By soaking the outdoor artificial board surface layer, the light stabilizer and the antioxidant are permeated into cell cavities, even the cell walls, along the glue-water and then are assembled and thermally pressed with a core layer, so that the surface ultraviolet aging process can be slowed down in the application process, and the surface of the artificial board can be protected.
Description
technical field [0001] The invention relates to a weather-resistant bamboo and wood-based panel and a manufacturing method thereof. Background technique [0002] my country's outdoor bamboo and wood-based panels, such as plywood, oriented strand board, and recombined bamboo, are used more and more. These materials usually undergo anti-corrosion treatment. Anti-corrosion treatment is only for the erosion of fungi, bacteria, and pests. The irradiation of ultraviolet rays in sunlight and the erosion of water also have a great impact on the durability of materials. Free radicals on the surface undergo photochemical changes, resulting in changes in color and gloss and surface roughness, which in turn leads to cracks and deeper damage, affecting the appearance and quality of the material. use performance, shorten the service life. Some bamboo production enterprises have even incurred huge claims, resulting in suspension of production or even bankruptcy. The field of outdoor bamboo...
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