GROUP-PROCESSED POLYLACTIC ACID FIBER FILTER ROD AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2024/060499

A1

Provided are a group-processed polylactic acid fiber filter rod and a preparation method therefor, which relate to the technical field of cigarette preparation. The polylactic acid fiber filter rod comprises an inner core layer (1) and an outer skin layer (2), the inner core layer (1) and the outer skin layer (2) both being formed by compounding a plurality of polylactic acid fiber tows. The polylactic acid fiber tows of the inner core layer (1) are prepared using a first component raw material, and the polylactic acid fiber tows in the outer skin layer (2) are prepared using a second component raw material. The L-lactic acid monomer content of the first component raw material is higher than the L-lactic acid monomer content of the second component raw material. A dispersant is added into the first component raw material, and glyceryl triacetate is added into the second component raw material. The preparation method has a simple arrangement and strictly controls the properties of the polylactic acid raw materials, such that all outer skin layers (2) have uniform crystallinity, all inner core layers (1) also have uniform crystallinity, nodes are uniformly distributed when the tows are crystallized, and the inner side and the outer side of the prepared polylactic acid fiber filter rod have gradually changing crystallinity, such that the manufacturing process is more stable, ensuring the adsorption performance of the filter rod.

JP6340009	Analytical system for smoking equipment filters associated with smoking equipment and related methods
JP5364097	Cigarette filter

YUE BAOSHAN (CN)
ZHAN JIANBO (CN)
WANG TAO (CN)
XIE JIAO (CN)
WANG XU (CN)
ZHENG HAN (CN)
WANG HAO (CN)
YU YAO (CN)
YU TINGTING (CN)
CHENG LIANG (CN)
DING WEI (CN)

PCT/CN2023/076384

March 28, 2024

February 16, 2023

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CHINA TOBACCO YUNNAN IND CO LTD (CN)

A24D3/02; A24D3/04; A24D3/10

CN115413819A	2022-12-02
CN216701614U	2022-06-10
US20170145597A1	2017-05-25
CN103074716A	2013-05-01
CN106637500A	2017-05-10
CN106945321A	2017-07-14
CN107199754A	2017-09-26
JP2009102796A	2009-05-14
JP2009148233A	2009-07-09

ZHEJIANG KG IP LAW FIRM (CN)

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