Filter material and/or filler material for mouthpieces for use with smoking products or hnb products, mouthpieces and cigarette filters comprising such a filter material and/or filler material, and method for manufacturing such a filter material and/or filler material

A method for manufacturing a filter material and a filler material for mouthpieces for use in smoking products or HNB products consisting of cellulose acetate filaments and/or cellulose acetate staple fibers, the method comprising the steps of:

• obtaining a solution of cellulose acetate having an acetyl value of at least 53% in acetone;
• pressing the solution of cellulose acetate through a spinneret having multiple openings;
• cutting the cellulose acetate filaments into the cellulose acetate staple fibers;
• forming a multitude of the cellulose acetate filaments and cellulose acetate staple fibers into a filter tow, wherein the filter tow is crimped,
• wherein the spinneret through which the solution of cellulose acetate is pressed is configured such that hollow cellulose acetate filaments are spun, wherein a hollow portion in the filter material and the filler material in relation to a section orthogonal to the cellulose acetate staple fibers of the filter material and filler material amounts to 25% to 90%, and wherein the a filament diameter of the cellulose acetate filaments ranges is 60 μm to 100 μm.