Method of manufacturing a compressibility gradient in paper

Details Method of manufacturing a compressibility gradient in paper Method of manufacturing a compressibility gradient in paper

D - Textiles, Paper

21

H

117/116

D21H 23/60 (2006.01) D21H 23/56 (2006.01) D21H 25/14 (2006.01)

Patent

CA 2021941

ABSTRACT OF THE DISCLOSURE: A method is disclosed of manufacturing a Z-directional compressibility gradient in a web of paper. The method comprises the steps of coating the peripheral surface of a roll with a film of plasticizer. An offset roll disposed adjacent to the roll is rotated such that the roll and the offset roll define therebetween a transfer nip so that a film of the plasticizer is transferred to the offset roll. The web is moved past the offset roll such that the web contacts the offset roll downstream relative to the transfer nip so that the film of the plasticizer is offset onto the web. The web is then passed with the offset coating of plasticizer through a calendering nip such that between the offset coating of the web and the subsequent calendering of the web with the offset coating, the plasticizer is permitted to uniformly and controllably penetrate into the web such that the Z-directional compressibility of the web is controlled prior to the web extending through the calendering nip.

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