| 摘要 |
<p>The invention relates to a method for calendering paper or board by leading a paper or board web through a calendering nip or area, where the web is subjected to pressing action together with thermal action. In the method, the web is brought, at the calendering nip or area, to a temperature higher than the glass transition temperature of the polymers contained in the web under such high pressure that the water in the web will vaporise, but will essentially remain as water. The web with thus remain in an essentially plastic state and calendering is continued unit the desired calendering effect is achieved.</p> |
