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公开(公告)号：US20200229488A1
公开(公告)日：2020-07-23
申请号：US16303879
申请日：2017-06-02
Applicant: PHILIP MORRIS PRODUCTS S.A.
Inventor： Ivan Prestia , Alberto Bonici , Emeric Grandjean , Edoardo Montanari , Ivan Chiarini , Michele Del Borrello
Abstract: A method for enhancing hardness of a filter (30) for a smoking article (10) includes disposing a plug wrap (60) about filter material; and applying a hardness-enhancing coating composition to the plug wrap after the plug wrap has been disposed about the filter material to enhance the hardness of the filter.
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