Bulky flexible paper and process for producing the same

Details Bulky flexible paper and process for producing the same Bulky flexible paper and process for producing the same

D - Textiles, Paper

21

H

D21H 21/22 (2006.01) D21H 17/07 (2006.01) D21H 17/14 (2006.01) D21H 25/06 (2006.01)

Patent

CA 2428505

A process for producing a printing paper through sheet forming from fibers which comprises using a bulking softener which is liquid or has a melting point of 40~C or lower and which has an HLB of 6 or lower, e.g., a polyhydric alcohol/higher fatty acid ester or a long-chain alkylammonium salt, and drying the paper in a preheating period (the period to the time when the temperature of the wet paper becomes constant in the drying step) so as to elevate the paper surface temperature to a value higher by at least 10~C than the melting point of the bulking softener. Thus, a printing paper is produced which is satisfactorily bulky and is flexible.

L'invention concerne un procédé de production de papier d'impression par la formation de feuilles à partir de fibres. Ledit procédé consiste à utiliser un agent amollissant et rendant le papier bouffant, se présentant sous forme liquide ou possédant un point de fusion d'au plus 40 ·C, présentant un HLB d'au plus 6, tel que, par exemple, un ester d'acide gras supérieur/polyol ou un sel d'alkylammonium à chaîne longue ; à sécher le papier pendant une période de préchauffage (période pendant laquelle la température du papier humide devient constante dans la phase de séchage), de sorte que la température superficielle soit élevée à une valeur supérieure d'au moins 10 ·C au point de fusion de l'agent amollissant et rendant le papier bouffant. On produit ainsi, un papier d'impression suffisamment bouffant et souple.

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