Manufacturing process of antiflaming formaldehyde free density board
A manufacturing process and density board technology, which is applied in the field of flame-retardant formaldehyde-free density board manufacturing process, can solve the problems of density board internal bonding strength, formaldehyde emission and poor flame retardancy, and achieve formaldehyde emission and flame retardancy. Effect
Active Publication Date: 2019-12-27
湖北吉象人造林制品有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to solve the above technical problems, to provide a manufacturing process of flame-retardant formaldehyde-free density board, the manufacturing process of the flame-retardant formaldehyde-free density board can better solve the existing density board internal bonding strength, formaldehyde emission and Solve the technical problem of poor flame retardancy, and realize the simultaneous improvement of internal bonding strength, formaldehyde emission and flame retardancy
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[0014] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0015] The present invention will be further described below in conjunction with specific embodiment:
[0016] A manufacturing process of a flame-retardant formaldehyde-free density board, which mainly includes the following steps: (1) preparing wood fibers through high temperature and high pressure; (2) adding adhesives, paraffin, flame retardants, and dyes to the wood fibers (3) The hot press solidifies the mixed wood fiber into shape. Wherein, in the step (1), the wood is poplar, and the poplar is softened by steam at a temperature of 170-180° C., a cooking pressure of 9.5 ± 0.5 bar, and a cooking time of 3.5 ± 0.3 min. Machine ground into the wood fiber, the wood fiber must include the following three sizes and...
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Abstract
The invention discloses a manufacturing process of antiflaming formaldehyde free density board. Under the conditions that temperature is 170-180 DEG C, the stewing pressure is 9.5+ / -0.5 bar, and the stewing time is 3.5+ / -0.3 min, poplar trees are softened by steam, and then are milled into wood fibers by a heat mill, the wood fibers must comprise the following three dimensions and proportions of the wood fibers that the wood fibers with length of 2 mm to 5.4 mm, length-width ratio of 63-110 and proportion of 10% to 20%, the wood fibers with length of 0.125-2 mm, length-width ratio of 35-63 andproportion of 70% to 90%, and the remaining wood fibers with length of 0.06-0.125 mm and length-width ratio of 20-35; 40+ / -5 kg / m<3> of isocyanate, 5.5+ / -0.5 kg / m<3> of paraffin, 57+ / -4 kg / m<3> of aphosphorus-series flame retardantand 1.8+ / -0.6 kg / m<3> are mixed, and then are dried to make the moisture content of the fibers must be 7+ / -0.5%; and finally the mixed materials are pressed and formedafter sequentially passing through five temperature zones in the hot press. According to the density board manufactured by the process, the performances in three aspects of internal binding strength,formaldehyde emission and flame retardance are simultaneously improved.
Description
technical field [0001] The invention belongs to the technical field of density boards, in particular to a manufacturing process of flame-retardant formaldehyde-free density boards. Background technique [0002] The current wood board market mainly includes plywood, ecological board, multi-layer board, particle board and density board. Although these boards are all artificial non-natural wood boards, they have essential differences in structure, especially plywood Ecological boards and multi-layer boards are made of stacked or thick or thin solid wood boards, while density boards are made of wood fibers or other plant fibers, prepared from fibers, and applied synthetically. Resin, under the condition of heat and pressure, is pressed into a plate, which is essentially different from it in structure. Relatively speaking, particle board and density board have a slight similarity in structure, that is, neither is pressed from a block of wood, where particle board is made of wood...
Claims
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Login to View More IPC IPC(8): B27N1/02B27N3/12
CPCB27N1/0209B27N3/12
Inventor 仲维龙肖锋腾辉刘丛飞
Owner 湖北吉象人造林制品有限公司