Cellulose acetate tow and method of making same
View Patent ↗A cigarette filter tow is a cellulose acetate tow having a high uncrimping energy (UCE) and a low fly. In one embodiment, the average UCE is greater than 280 and the average fly is less than or equal to 0.030 grams per 30 minutes. In another embodiment, the average UCE is greater than 265 and the average fly is less than or equal to 0.023 grams per 30 minutes. In another embodiment, the average UCE is greater than 250 and the average fly is less than or equal to 0.017 grams per 30 minutes.
1. A cigarette filter tow comprising:
a cellulose acetate tow with an average uncrimping energy of greater than 280 gcm/cm and an average fly of less than or equal to 0.030 grams per 30 minutes.
2. A cigarette filter tow comprising:
a cellulose acetate tow with an average uncrimping energy of greater than 265 gcm/cm and an average fly of less than or equal to 0.023 grams per 30 minutes.
3. A cigarette filter tow comprising:
a cellulose acetate tow with an average uncrimping energy of greater than 250 gcm/cm and an average fly of less than or equal to 0.017 grams per 30 minutes.
4. The cigarette tow of claims 1 – 3 further comprising an average rod-to-rod pressure drop coefficient of variation of 2.5 or less.
5. The cigarette tow of claim 4 further comprising an average rod-to-rod pressure drop coefficient of variation of 2.2 or less.
6. The cigarette filter tow of claim 4 further comprising an average rod-to-rod pressure drop coefficient of variation of 1.75 or less.
7. The cigarette filter tow of claims 1 – 3 further comprising a firmness of 80 firmness units or more.
8. The cigarette filter tow of claims 1 – 3 further comprising a denier per filament in the range of 2–4.
9. A cigarette filter rod comprising the tow of claims 1 – 3 .
10. A cigarette filter tip comprising the tow of claims 1 – 3 .
11. A cigarette having a filter tip comprising the tow of claims 1 – 3 .
12. A cigarette filter tow comprising:
a cellulose acetate tow with an average UCE to average fly relationship of
Fly( g/ 30 min )<0.00009 e (0.0209UCE) ,
up to the fly value of 0.06.
13. The cigarette filter tow of claim 12 further comprising an average rod-to-rod pressure drop coefficient of variation of less than 2.2.
14. The cigarette filter tow of claim 12 further comprising a firmness of 80 firmness units or more.
15. The cigarette filter tow of claim 12 further comprising a denier per filament in the range of 2–4.
16. A cigarette filter rod comprising the tow of claim 12 .
17. A cigarette filter tip comprising the tow of claim 12 .
18. A cigarette having a filter tip comprising the tow of claim 12 .