Tobacco filters and method for producing same

Tobacco – Smoke separator or treater – Having a polymer

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Details

131341, 131343, 131345, A24D 308, A24D 310

Patent

active

045791309

ABSTRACT:
A process is provided for producing cigarette filters which exhibit desired adhesion properties between the filter fibers, and which may be subjected to a substantially broader operating range during a temperature melt fusion step. A crystalline propylene polymer and a second crystalline polymer are mixed together, and the blend is extruded into fibers which are then heated to a temperature above the original melting point of the second crystalline polymer and below the original melting point of the crystalline propylene polymer. The fibers are twisted and/or crimped to effectuate desired adhesion between the fibers and are subsequently formed into filter rods which display greatly increased cohesiveness.

REFERENCES:
patent: 3038478 (1962-06-01), Touey et al.
patent: 3039908 (1962-06-01), Parmele
patent: 3595245 (1971-07-01), Buntin et al.
patent: 3960770 (1976-06-01), Raley
patent: 4261373 (1981-04-01), Tamauki et al.

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