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

Abstract

The invention relates to a filter material and/or filler material for mouthpieces for use with smoking products or HNB products, the filter material and/or filler material being based on cellulose acetate filaments, at least parts of which are in the form of hollow cellulose acetate filaments. The invention also relates to a mouthpiece for use with smoking products or HNB products, the mouthpiece comprising a filter material and/or filler material of the type according to the invention. The invention also relates to a cigarette filter comprising such a filter material and/or filler material, and to a corresponding method for manufacturing a filter material and/or filler material for mouthpieces for use with smoking products or HNB products.

1 . 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.   
     
     
         2 . The method according to  claim 1 ,
 wherein a crimp index of the cellulose acetate filaments is 10% and 60%.   
     
     
         3 . The method according to  claim 1 ,
 wherein the cellulose acetate filaments include a plasticizer in even distribution thereof; and   wherein a water-soluble adhesive is present on a surface of the cellulose acetate filaments.   
     
     
         4 . The method according to  claim 1 ,
 wherein the cellulose acetate filaments and the cellulose acetate staple fibers comprise a plasticizer, and wherein a plasticizer content of the plasticizer is 1% and 40%.   
     
     
         5 . The method according to  claim 1 ,
 wherein the cellulose acetate filaments and the cellulose acetate staple fibers comprise a plasticizer, and wherein the plasticizer is triacetin, triethylene glycol diacetate, citric acid diethyl ester, or combinations thereof.   
     
     
         6 . The method according to  claim 1 ,
 wherein the cellulose acetate filaments have a fineness of 5 denier and 30 denier.   
     
     
         7 . The method according to  claim 1 ,
 wherein a total titer of the filter and filler material is 4,000 denier and 40,000 denier.   
     
     
         8 . The method according to  claim 1 ,
 wherein a mass fraction of the hollow cellulose acetate filaments is 20% to 100%.   
     
     
         9 . The method according to  claim 1 ,
 wherein the hollow cellulose acetate filaments are mutually distanced from one another in an irregular arrangement, and wherein the cellulose acetate filaments are crosslinked, and wherein the cellulose acetate filaments are entwined and entangled with one another.   
     
     
         10 . The method according to  claim 1 ,
 wherein a binder is provided for-binding the cellulose acetate filaments.   
     
     
         11 . A mouthpiece for use with the smoking products or HNB products, wherein the mouthpiece comprises a filter material and filler material manufactured in accordance with the method according to  claim 1 . 
     
     
         12 . The mouthpiece according to  claim 11 ,
 wherein a fiber density of the filter material and the filler material is 10 to 70 kg per m 3 ; and   wherein the mouthpiece has a Filtrona hardness of at least 88% and   wherein the mouthpiece has a draw resistance of at least 0.1 daPa per mm of a filter length of the mouthpiece.   
     
     
         13 . The mouthpiece according to  claim 11 ,
 wherein a capsule-shaped or capsule-like flavor release element is further incorporated into the filter and filler material.   
     
     
         14 . The mouthpiece according to  claim 11 ,
 wherein the filter material and filler material comprises solid cellulose acetate filaments.   
     
     
         15 . A cigarette filter or cigarette filter element, comprising a filter material and filler material manufactured in accordance with the method according to  claim 1 . 
     
     
         16 . The cigarette filter or cigarette filter element according to  claim 15 ,
 wherein a fiber density of the filter material and the filler material is 10 to 70 kg per m 3 ; and,   wherein the cigarette filter or cigarette filter element has a Filtrona hardness of at least 88% and   wherein the cigarette filter or cigarette filter element has a draw resistance of at least 0.1 daPa per mm of a filter length of the cigarette filter or cigarette filter element.   
     
     
         17 . The cigarette filter or cigarette filter element according to  claim 15 ,
 wherein a capsule-shaped or capsule-like flavor release element is incorporated into the filter and filler material.   
     
     
         18 . The cigarette filter or cigarette filter element according to  claim 15 , wherein the cigarette filter or cigarette filter element comprises solid cellulose acetate filaments.