High-density hollow filter tip and composite filter tip thereof

Abstract

The invention discloses a high-density hollow filter tip which is of a hollow revolving body structure formed by rolling a high-density material; wherein the density range is 0.9 g / cm < 3 > to 1.6 g / cm < 3 >, the wall thickness is 0.05-0.7 mm, and the outer diameter is 5.0-8.0 mm. Materials for preparing the high-density hollow filter tip comprise cellulose acetate and derivatives thereof, polyhydroxyalkanoate and polyolefin organic high-molecular polymers; cellulose acetate and the derivatives thereof comprise cellulose diacetate, cellulose acetate propionate, cellulose acetate butyrate, methyl cellulose, ethyl cellulose and hydroxypropyl cellulose; the hydroxyl substitution degree of cellulose acetate and the derivative thereof is 1.5-2.8. The invention further discloses a composite filter tip comprising the high-density hollow filter tip and application of the composite filter tip in cigarette heating. When the composite filter tip is applied to heating cigarettes, the cigarette pressure drop can be reduced, a smoke mixing space can be increased, smoke adsorption can be reduced, the smoke temperature can be reduced, the smoke amount can be increased, and the cigarette smoking comfort can be kept.

Description

technical field [0001] The invention belongs to the technical field of cigarettes and relates to a mouth rod structure, in particular to a composite mouth rod including a high-density hollow mouth rod. Background technique [0002] Heated smoking products in which the aerosol-generating substrate containing tobacco is heated by a heat source instead of being burned to generate smoke. It is known in the field of cigarettes that the tobacco components will still undergo distillation and cracking at a heating temperature of approximately 200-375°C, thereby releasing Smoke out. [0003] Compared with traditional cigarettes, the smoke release volume of heated cigarette products is 5% of that of traditional cigarettes. In order to effectively heat the tobacco and fully release the aerosol, most of the heated cigarette is completely wrapped by the heating device, and the distance from the heating end to the mouth end is relatively short, and the aerosol generating substrate (tobac...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned hollow pipe fittings as the support section or isolation section are directly in contact with the tobacco section, and there are technical difficulties in hardness, stiffness, safety, and complicated process waiting for improvement during processing and use. For example, the hollow cellulose acetate pipe needs to be made of cellulose acetate The raw material is dry-spun to obtain high single-denier fiber tow, and then a large amount of plasticizer is added to the tow on a special filter rod forming machine to form it by hot pressing (the processing technology is consistent with the processing and molding process described in the patent CN102166041B), and the process is complicated. At the same time, it is difficult to process thin-walled empty tubes (80%), and the ratio of the inner diameter cavity to the outer diameter is low, which is not conducive to the full mixing of atomized aerosols, and the gaps in the wall materials It is not conducive to heat conduction to the outside, and is not conducive to low smoke adsorption. At the same time, the direct contact area between the hollow tube and the tobacco section is large, and there is a certain phenomenon of coking heat shrinkage during smoking.

Paper empty tubes have high hygroscopicity, and high temperature and high content of water vapor are easily absorbed by paper empty tubes, which makes it difficult to maintain the stiffness of empty tubes and is prone to deformation

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