Tower pressure type wood fiber plywood process
A wood fiber and plywood technology, which is applied in wood processing appliances, wood treatment, manufacturing tools, etc., can solve the problems of easy fiber shedding, poor nail holding force, low internal bonding strength, etc. Improve and improve the effect of internal cohesion
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Embodiment 1
[0019] Embodiment one: a kind of tower pressure type wood fiber plywood process comprises the following steps:
[0020] a. Pulverize the wood to obtain wood chips A;
[0021] b. Precooking wood chips A to obtain wood chips B;
[0022] c. Wood chip B is pressure-cooked, and the cooking pressure is 9.0 MPa to obtain wood chip C;
[0023] d. Thermally grind the wood chip C, and the pressure in the grinding chamber is 9.0 MPa. , get wet wood fiber;
[0024] e, wet wood fiber is dried to obtain dry wood fiber, the moisture content of dry wood fiber is 7-9%, preferably 7%;
[0025] f. Mix dry wood fiber with adhesive to obtain soft intermediate material. Adhesives include urea-formaldehyde resin, paraffin and curing agent, the amount of urea-formaldehyde resin is 200kg / m 3 , the amount of paraffin wax is 2.5kg / m 3 , the amount of curing agent is 3.5kg / m 3 ;
[0026] g. Pre-press and trim the soft intermediate material. The pre-pressing process is that the soft intermediate ...
Embodiment 2
[0029] Embodiment two: a kind of tower pressure type wood fiber plywood process comprises the following steps:
[0030] a. Pulverize the wood to obtain wood chips A;
[0031] b. Precooking wood chips A to obtain wood chips B;
[0032] c. Wood chip B is pressure-cooked, and the pressure of cooking is 9.7MPa to obtain wood chip C;
[0033] d. Thermally grind the wood chip C, and the pressure in the grinding chamber is 9.6MPa. , get wet wood fiber;
[0034] e, wet wood fiber is dried to obtain dry wood fiber, the moisture content of dry wood fiber is 7-9%, preferably 7%;
[0035] f. Mix dry wood fiber with adhesive to obtain soft intermediate material. Adhesives include urea-formaldehyde resin, paraffin and curing agent, the amount of urea-formaldehyde resin is 260kg / m 3 , the amount of paraffin wax is 7.0kg / m 3 , the amount of curing agent is 7.0kg / m 3 ;
[0036] g. Pre-press and trim the soft intermediate material. The pre-pressing process is that the soft intermediate...
Embodiment 3
[0039] Embodiment three: a kind of tower pressure type wood fiber plywood process comprises the following steps:
[0040] a. Pulverize the wood to obtain wood chips A;
[0041] b. Precooking wood chips A to obtain wood chips B;
[0042] c. Wood chip B is pressure-cooked, and the pressure of cooking is 9.5MPa to obtain wood chip C;
[0043] d. Thermally grind the wood chip C, and the pressure in the grinding chamber is 9.4MPa. , get wet wood fiber;
[0044] e, wet wood fiber is dried to obtain dry wood fiber, the moisture content of dry wood fiber is 7-9%, preferably 7%;
[0045] f. Mix dry wood fiber with adhesive to obtain soft intermediate material. Adhesives include urea-formaldehyde resin, paraffin and curing agent, the amount of urea-formaldehyde resin is 230kg / m 3 , the amount of paraffin wax is 5kg / m 3 , the amount of curing agent is 5kg / m 3 ;
[0046] g. Pre-press and trim the soft intermediate material. The pre-pressing process is that the soft intermediate m...
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