Method for manufacturing cigarette filters
AssigneesMitsubishi Rayon Co., Ltd., Mitsubishi Acetate Co., Ltd.
InventorsNaoki Mochida, Kazuhiko Morifuji, Takashi Sakai
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Abstract
A method for manufacturing cigarette filters which have a well-stabilized shape in which acetate fibrous tows impregnated with carboxylic acid ester of polyol are formed into a predetermined shape, uniformly impregnated with water, and irradiated with microwave energy. Water is used during the application of microwave energy to enhance the absorption of microwave energy and hence heating of the filter. This causes the carboxylic acid ester of polyol to very rapidly disperse causing it to permeate into the acetate fiber to rapidly complete the stabilization and solidification of the filter.
Claims8
A method for producing fibrous rod articles having a desired configuration stabilization comprising the steps of:
- forming into fibrous rods cellulose esters fibers impregnated with at least one carboxylic acid ester of polyol;
- uniformly impregnating said cellulose ester fibers with water;
- and
- irradiating the fibrous rods with microwave energy to heat said water to a predetermined temperature.
Dependencies are inferred from the claim text.