Waterproof antibacterial directional shaving board and preparation method thereof

Abstract

The invention provides a waterproof antibacterial directional shaving board. The waterproof antibacterial directional shaving board comprises an upper surface layer, a core layer and a lower surface layer, the mass ratio of the upper surface layer and the lower surface layer to the core layer is (60% to 75%):(25% to 40%), and the paving included angles between the upper surface layer and the corelayer as well as between the lower surface layer and the core layer are each 80-90 degrees. The invention further provides a preparation method of the waterproof antibacterial directional shaving board. The preparation method comprises the steps of shaving, drying, mixed spraying, drying, gluing, paving, liquid spraying and hot pressing, plate billet balancing, edge cutting, cooling, sanding and film forming. The waterproof antibacterial directional shaving board has the beneficial effects that a reaction between -NCO groups of isocyanate MDI glue in a board material of the waterproof antibacterial directional shaving board and -OH groups of shavings is complete, the gluing effect is good, and internal stress is uniformly distributed; the board material is good in overall stability, in thelong-term using or storage process, the phenomena of crack, layering, bulking and the like are avoided, and release of substances such as formaldehyde harmful to the human body is avoided; and bacterial resisting, mold preventing and insect preventing can be effectively achieved, and the antibacterial rate of the waterproof antibacterial directional shaving board reaches 99.1-99.7%.

Description

technical field [0001] The invention relates to the field of oriented strand boards, in particular to a waterproof and antibacterial oriented strand board and a preparation method thereof. Background technique [0002] Oriented strand board is one of the new varieties of particle board. When the shavings are paved and formed, the upper and lower surface layers of the oriented strand board will arrange the glue-mixed shavings longitudinally according to the fiber direction, and the core layer shavings will be arranged horizontally to form a three-layer structure slab, which is then hot-pressed into an oriented strand board. The particle shape of this particle board requires a larger aspect ratio, and the thickness is slightly thicker than that of ordinary particle board. [0003] Oriented strand board is a log that is peeled, cut into slices with a certain geometric shape along the direction of the wood grain, and then dried, and then applied with synthetic resin glue and wa...

AI Technical Summary

Problems solved by technology

The disadvantage of this patent: after the preparation process produces oriented strand board, the reaction between the -NCO group of the isocyanate MDI glue inside the board and the -OH group of the shavings is not complete, and subsequent reactions lead to The stress distribution is uneven, the board is easy to crack and delaminate, the waterproof performance is not good, and the strength and elastic modulus cannot be improved

The disadvantage of this patent: after the preparation process produces oriented strand board, the reaction between the -NCO group of the isocyanate MDI glue inside the board and the -OH group of the shavings is not complete, and subsequent reactions lead to The stress distribution is uneven, and the board is easy to crack and delaminate, which affects its waterproof and antibacterial performance. In a humid environment, it is easy to breed bacteria, mold, and insects

However, the above method cannot fundamentally solve this technical problem, and cannot overcome the problem of uneven internal stress of the board. It only sandwiches and covers the cracked and delaminated core board through the upper and lower surface

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