Abstract
Kraft paper was crosslinked with formaldehyde by liquid- and gas-phase methods. The water sorption isotherms, fiber saturation points, and acetal contents were determined. From these data it was concluded that (i) crosslink effectiveness was related to the relative vapor pressure of water during the crosslinking reaction, (ii) the dimensional stabilization per crosslink decreased with increasing reaction times, and (iii) strong alkaline swelling agents could penetrate all portions of the crosslinked papers.
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