发明名称 |
A method of producing lignocellulosic boards. |
摘要 |
A method of the production of boards of a lignocellulosic fibrous material wherein a material is broken up into particles and/or fibers that are dried, glued and formed to a mat and pressed to a finished board so that steam is introduced to the mat. According to the present invention, the steam is introduced in a limited amount in a first injection step. This amount is adjusted so that the steam only penetrates into, heats and cures the surface layer of the mat. Thus, a board having a surface layer with a higher density than a middle layer is obtained so that the subsequent calibration compression provides a greater thickness that permits the middle layer to expand while the density of the surface layers is maintained. |
申请公布号 |
ZA9606391(B) |
申请公布日期 |
1997.02.19 |
申请号 |
ZA19960006391 |
申请日期 |
1996.07.26 |
申请人 |
SUNDS DEFIBRATOR INDUSTRIES AB. |
发明人 |
N. LENNART ERIKSSON;GORAN LUNDGREN;LARS-OTTO SISLEGARD;KJELL SJODIN |
分类号 |
B27N3/18;B27N3/08;B27N3/24 |
主分类号 |
B27N3/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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