Cooling cigarette filter and smoking product

Patent metadata

Field	Value
Publication number	US-12137730-B2
Application number	US-201917418219-A
Country	US
Kind code	B2
Filing date	Feb 20, 2019
Priority date	Dec 26, 2018
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A cooling cigarette filter and a smoking product are provided. The cooling cigarette filter comprises a cooling section. The cooling section is provided with one or more channels connecting two ends of the cooling section, and an inner surface of each channel is coated with a cooling material. The cooling material comprises an inorganic phase change material and PEG, and the inorganic phase change material comprises at least one of Na2CO3·10H2O, CH3COONa·3H2O, CaCl2·4H2O, and Na2SO4·10H2O. The cooling cigarette filter has the advantages of ensuring the amount of smoke and lowering the temperature of the smoke entering the mouth, especially in the cooling section. Through the combination design of the structure of the cooling stick and the type and amount of the cooling material, the smoke can flow out of a smoke generation section rapidly and smoothly.

First claim

The invention claimed is:

1. A cooling cigarette filter, comprising a cooling section, wherein:
the cooling section is provided with one or more channels connecting two ends of the cooling section;
an inner surface of each channel is coated with a cooling material;
the cooling material is a compound mixture of an inorganic phase change material and PEG; and
the inorganic phase change material comprises at least one of Na 2 CO 3 ·10H 2 O, CH 3 COONa·3H 2 O, CaCl 2 ·4H 2 O, and Na 2 SO 4 ·10H 2 O.

2. The cooling cigarette filter according to claim 1 , wherein the PEG comprises at least one of PEG-200, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000, PEG-4000, PEG-6000, PEG-8000, PEG-10000, and PEG-20000.

3. The cooling cigarette filter according to claim 1 , wherein the PEG is at least one of PEG-200, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000, PEG-4000, PEG-6000, and PEG-8000.

4. The cooling cigarette filter according to claim 1 , wherein a mass ratio of the inorganic phase change material to the PEG in the cooling material is (1-2):(1-5).

5. The cooling cigarette filter according to claim 1 , wherein a coating amount of the cooling material is 3-50 g/m 2 .

6. The cooling cigarette filter according to claim 5 , wherein the coating amount of the cooling material is 5-30 g/m 2 .

7. The cooling cigarette filter according to claim 1 , wherein the channel is a through hole or an irregular hole.

8. The cooling cigarette filter according to claim 1 , wherein:
the cooling section is formed by repeatedly bending or twisting a carrier in a cylindrical space;
the cooling material is coated on a surface of the carrier; and
the carrier is one of paper, an organic polymer film, and a non-woven fabric.

9. The cooling cigarette filter according to claim 1 , wherein the cooling section is formed by bundling a plurality of cylinders, and the cooling material is coated on inner surfaces and/or outer surfaces of the cylinders.

10. A smoking product, comprising:
a cooling cigarette filter and a smoke generation section connected with the cooling cigarette filter, wherein the cooling cigarette filter comprises a cooling section, wherein:
the cooling section is provided with one or more channels connecting two ends of the cooling section;
an inner surface of each channel is coated with a cooling material;
the cooling material is a compound mixture of an inorganic phase change material and PEG; and
the inorganic phase change material comprises at least one of Na 2 CO 3 ·10H 2 O, CH 3 COONa·3H 2 O, CaCl 2 ·4H 2 O, and Na 2 SO 4 ·10H 2 O.

11. The smoking product according to claim 10 , wherein the PEG comprises at least one of PEG-200, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000, PEG-4000, PEG-6000, PEG-8000, PEG-10000, and PEG-20000.

12. The smoking product according to claim 10 , wherein the PEG is at least one of PEG-200, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000, PEG-4000, PEG-6000, and PEG-8000.

13. The smoking product according to claim 10 , wherein a mass ratio of the inorganic phase change material to the PEG in the cooling material is (1-2):(1-5).

14. The smoking product according to claim 10 , wherein a coating amount of the cooling material is 3-50 g/m 2 .

15. The smoking product according to claim 14 , wherein the coating amount of the cooling material is 5-30 g/m 2 .

16. The smoking product according to claim 10 , wherein the channel is a through hole or an irregular hole.

17. The smoking product according to claim 10 , wherein:
the cooling section is formed by repeatedly bending or twisting a carrier in a cylindrical space;
the cooling material is coated on a surface of the carrier; and
the carrier is one of paper, an organic polymer film, and a non-woven fabric.

18. The smoking product according to claim 10 , wherein the cooling section is formed by bundling a plurality of cylinders, and the cooling material is coated on inner surfaces and/or outer surfaces of the cylinders.

Assignees

• China Tobacco Hunan Ind Co Ltd

Inventors

• Luo Wei
• Zhong Kejun
• Liu Jianfu
• Xie Lanying
• Qin Liangsheng
• Du Wen
• Yi Jianhua
• Yin Xinqiang
• Ding Duo
• Wen Jianhui
• Xie Guoyong

Classifications

• A24D3/16

  of inorganic materials · CPC title

• A24D3/14

  of organic materials as additive (of ion exchange materials A24D3/12) · CPC title

• A24D3/067

  characterised by functional properties · CPC title

• A24D3/066

  in the form of foam or having cellular structure · CPC title

• A24D3/0275

  for filters with special features · CPC title