Continuous solid state web coating process and webs produced...

Details Continuous solid state web coating process and webs produced... Continuous solid state web coating process and webs produced...

B - Operations, Transporting

32

B

B32B 5/16 (2006.01) A01N 25/34 (2006.01)

Patent

CA 2606553

One or more particulate active agents are fused to the surface of a substrate web by mixing the particulate agents with a germicide and a particulate binder having a particle size not exceeding an average diameter of approximately 40 microns and coating the composite mixture onto the surface of the substrate. Thereafter, the coated substrate is heated to a temperature equal to or greater than the Vicat softening temperature of the binder and compressed within the nip of a pair of pressure rolls to achieve fusion. If desired, a top layer may be placed upon the coated composite prior to the compression step. Also disclosed are various products manufactured by the process.

On fait fondre sur la surface d'une bande substrat un ou plusieurs agents actifs particulaires après les avoir mélangés à un germicide et à un liant particulaire dont la taille des particules n'excède pas un diamètre moyen d'environ 40 micromètres, puis on enduit de ce mélange composite la surface du substrat. Le substrat revêtu est ensuite chauffé à une température supérieure ou égale au point Vicat du liant, puis pressé dans la pince de deux rouleaux de pression pour achever la fusion. Il est possible, le cas échéant, de déposer une couche supérieure sur le composite revêtu avant l'opération de pressage. Divers produits fabriqués par ce procédé sont également indiqués.

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