| 摘要 |
<p>A "cold corrugating" process for making corrugated paperboard material (40) by use of a predetermined sodium silicate adhesive (43) material which enables the requirement of elevated temperatures to set and cure the adhesive to be reduced or eliminated. The cold corrugated paperboard material made by the "cold corrugating" process is free of defects resulting from heating of the board material as in conventional corrugating processes for setting and curing conventional starch or sodium silicate adhesives. A fire-resistant paperboard material including fire-resistant corrugated paperboard material is produced by a cold process in which the predetermined sodium silicate material provides the functions of a fire-resistant layer and an adhesive for laminating the paperboard material.</p> |
