Title:
PREPARATION METHOD FOR POLYLACTIC ACID FIBER FILTER ROD WITH GOOD TEMPERATURE RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2024/060502
Kind Code:
A1
Abstract:
A preparation method for a polylactic acid fiber filter rod with good temperature resistance, which relates to the technical field of cigarette preparation. The method comprises the following steps: selecting at least two kinds of up-to-standard polylactic acid raw materials having the content of a levo-isomer being within a predetermined range; selecting an up-to-standard polylactic acid raw material having the highest content of the levo-isomer to prepare a core component; selecting an up-to-standard polylactic acid raw material having the lowest content of the levo-isomer to prepare a sheath component; coating an outer side of the core component with the sheath component to form sheath-core polylactic acid fiber tows; and carrying out forming on a plurality of sheath-core polylactic acid fiber tows to prepare a polylactic acid filter rod. The present invention is simple and convenient. By means of controlling the proportions and preparation of polylactic acid raw materials, so as to obtain sheath-core polylactic acid fibers of a multi-layer structure and improve the uniformity of an inner-layer structure thereof, the prepared polylactic acid fiber filter rod is stable to cut. The crystallinity and the temperature resistance gradually change from inside to outside in the tows, such that the whole filter rod has better temperature resistance, and the filter performance of the polylactic acid tows is improved.
Inventors:
YUE BAOSHAN (CN)
WANG TAO (CN)
SHEN YANFEI (CN)
XIE JIAO (CN)
ZHENG HAN (CN)
WANG HAO (CN)
GUI YONGFA (CN)
ZHANG JING (CN)
DING HAIYAN (CN)
CHENG LIANG (CN)
DING WEI (CN)
WANG TAO (CN)
SHEN YANFEI (CN)
XIE JIAO (CN)
ZHENG HAN (CN)
WANG HAO (CN)
GUI YONGFA (CN)
ZHANG JING (CN)
DING HAIYAN (CN)
CHENG LIANG (CN)
DING WEI (CN)
Application Number:
PCT/CN2023/076472
Publication Date:
March 28, 2024
Filing Date:
February 16, 2023
Export Citation:
Assignee:
CHINA TOBACCO YUNNAN IND CO LTD (CN)
International Classes:
D01F1/10; A24D3/02; A24D3/06; A24D3/08; D01D5/34; D01F8/14
Foreign References:
| CN103074716A | 2013-05-01 | |||
| CN115506041A | 2022-12-23 | |||
| CN112226844A | 2021-01-15 | |||
| CN111789285A | 2020-10-20 | |||
| CN112251827A | 2021-01-22 | |||
| CN113481629A | 2021-10-08 | |||
| CN113584629A | 2021-11-02 | |||
| JP2007284846A | 2007-11-01 | |||
| US20100130699A1 | 2010-05-27 |
Attorney, Agent or Firm:
ZHEJIANG KG IP LAW FIRM (CN)
Download PDF:
Previous Patent: PREPARATION METHOD FOR KNIFE-HITTING-PREVENTING POLYLACTIC ACID FIBER FILTER STICK
Next Patent: OIL PUMPING DEVICE AND VEHICLE
Next Patent: OIL PUMPING DEVICE AND VEHICLE