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| Research Progress on Environmentally Friendly Cooling and Low-retention Filter Rods |
| Received:November 11, 2025 Revised:December 17, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.05.011 |
| Key Words:heated tobacco products paper filter material cooling and low-retention environmentally friendly filter rods |
| Author Name | Affiliation | Postcode | | HAO Xiaoli* | 1Shanghai Novel Tobacco Products Research Institute Co., Ltd., Shanghai, 200120 | 200120 | | YANG Jing | 1Shanghai Novel Tobacco Products Research Institute Co., Ltd., Shanghai, 200120 | 200120 | | WANG Xu | 1Shanghai Novel Tobacco Products Research Institute Co., Ltd., Shanghai, 200120 | 200120 | | WANG Gang | 1Shanghai Novel Tobacco Products Research Institute Co., Ltd., Shanghai, 200120 | 200120 | | XU Gangqiang | 1Shanghai Novel Tobacco Products Research Institute Co., Ltd., Shanghai, 200120 | 200120 | | SHA Yunfei* | 2Shanghai Tobacco Group Co., Ltd., Shanghai, 200082 | 200082 | | CAI Zhenbo | 2Shanghai Tobacco Group Co., Ltd., Shanghai, 200082 | 200082 |
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| Abstract:Paper-based filter materials， owing to their biodegradability， readily available raw materials， and cost advantages， emerged as a potential alternative for filter rods in both conventional cigarettes and heated tobacco products. This paper systematically reviewed the evolution of filter rods from traditional functions toward “cooling and low-retention” capabilities， with a focus on the application of paper-based composite filter materials and other environmentally friendly materials in heated tobacco products. It summarized， from three aspects—organic polymer materials， composite materials， and structural cooling techniques—the mechanisms and effectiveness of achieving aerosol cooling and appropriate filtration through material structure design and the addition of functional additives. Finally， this paper analyzed the current challenges in terms of performance balance， industrialization bottlenecks， and the lack of evaluation systems， and looked forward to future directions including material innovation， structural optimization， system integration， and the establishment of standards， aiming to provide a reference for the green transition of the novel tobacco industry. |
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