Novel cigarette filter containing moisturizer

Abstract

The present disclosure provides a cigarette filter including lyocell tow including a bundle of lyocell fibers, a moisturizer, and a binder, a smoking article including the cigarette filter, and a method of producing the cigarette filter.

1 . A cigarette filter comprising:
 lyocell tow including a bundle of lyocell fibers;   a moisturizer; and   a binder.   
     
     
         2 . The cigarette filter of  claim 1 , wherein the moisturizer includes one or more of propylene glycol (PG) and glycerin. 
     
     
         3 . The cigarette filter of  claim 1 , wherein the moisturizer and the binder are dispersed in the lyocell tow by a brush type method or a spray type method. 
     
     
         4 . The cigarette filter of  claim 1 , wherein:
 the binder includes one or more selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and a polyester-based binder; and   the polyester-based binder includes one or more selected from the group consisting of C5-C12 alkylene, C5-C12 arylene, and C5-C12 hetero-arylene.   
     
     
         5 . The cigarette filter of  claim 1 , further comprising one or more emulsifiers among a fatty acid carboxyl-based compound, a sorbitan ester-based compound, a sorbate-based compound, and an ethoxy-based compound. 
     
     
         6 . The cigarette filter of  claim 1 , further comprising triethyl citrate. 
     
     
         7 . The cigarette filter of  claim 6 , wherein a content of the triethyl citrate is 3 wt % to 7 wt % with respect to a weight of the lyocell tow constituting the cigarette filter. 
     
     
         8 . The cigarette filter of  claim 1 , wherein a content of the moisturizer is 1 mg to 5 mg per length (mm) of the cigarette filter. 
     
     
         9 . The cigarette filter of  claim 1 , wherein a content of the moisturizer is 0.1 mg to 0.5 mg per weight (mg) of the lyocell tow. 
     
     
         10 . A smoking article comprising:
 a tobacco medium portion;   a filter portion; and   a wrapper,   wherein the filter portion includes lyocell tow including lyocell fibers, a moisturizer, and a binder,   wherein the moisturizer includes one or more of propylene glycol (PG) and glycerin, and   wherein the moisturizer and the binder are dispersed in the lyocell tow by a brush type method or a spray type method.   
     
     
         11 . The smoking article of  claim 10 , wherein:
 the filter portion is divided into two or more segments; and   one or more of the two or more segments include the lyocell tow including a bundle of the lyocell fibers, the moisturizer, and the binder.   
     
     
         12 . The smoking article of  claim 10 , wherein the smoking article is a non-combustion heating type smoking article. 
     
     
         13 . A method of producing a cigarette filter, the method comprising:
 preparing lyocell tow including a bundle of lyocell fibers (S 1 );   mixing a moisturizer and a binder to prepare a mixed solution (S 2 ); and   dispersing the mixed solution in the lyocell tow (S 3 ),   wherein the moisturizer includes one or more of propylene glycol (PG) and glycerin,   wherein the binder includes one or more selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and a polyester-based binder,   wherein the polyester-based binder includes one or more selected from the group consisting of C5-C12 alkylene, C5-C12 arylene, and C5-C12 hetero-arylene, and   wherein the operation (S 3 ) includes dispersing the mixed solution in the lyocell tow by a brush type method or a spray type method.   
     
     
         14 . The method of  claim 13 , wherein one or more emulsifiers among a fatty acid carboxyl-based compound, a sorbitan ester-based compound, a sorbate-based compound, and an ethoxy-based compound and triethyl citrate are additionally mixed in the mixed solution of the operation (S 2 ).