Patent ID: 9179709
Filing Date: 2015-11-10
Classification: A24D,D01G,D01H,D02G

Abstract:
1. A method for forming a fibrous bundle suitable for use in a filter element for a smoking article, the method comprising: blending a first plurality of cellulose acetate staple fibers with a second plurality of staple fibers comprising a polymeric material different from the first plurality of staple fibers to give a fiber mixture; carding the fiber mixture to provide a mixed fiber sliver; and drafting the mixed fiber sliver to adjust the denier of the mixed fiber sliver, strengthening the mixed fiber sliver by air entangling or incorporating a core yarn or textured yarn into the mixed fiber sliver, or performing both said drafting and said strengthening of the mixed fiber sliver, wherein the mixed fiber sliver has a total denier in the range of from about 20,000 denier to about 80,000 denier.