Tobacco – Smoke separator or treater – Having a polymer
Patent
1980-07-23
1983-04-12
Millin, V.
Tobacco
Smoke separator or treater
Having a polymer
131341, 131342, 131343, 131345, A24D 302, A24D 304, A24D 306
Patent
active
043794653
ABSTRACT:
Process for producing a filtering structure, in particular for cigarette filters from a fibrous mass comprising a homogeneous mixture of fibres of different types. Some of the fibres are necessarily thermofusible synthetic fibres having a low melting point and adhesive properties in the molten state, and the others are absorbent with respect to harmful products of tobacco smoke and stable at the melting temperature of the thermofusible fibres. The fibrous mixture is shaped into a cylindrical rod which is in state which is not yet coherent but homogeneous and comprises fibrous networks which are closely imbricated relative to each other. According to the invention, the process comprises employing a notable proportion of thermofusible fibres relative to the absorbent fibres, bringing the fibrous mixture to a temperature which leaves the absorbent fibres intact but which is high enough to melt and fluidify all the thermofusible material which, initially present in the form of fibres, is converted into fine droplets dispersed in the network of absorbent fibres. This conversion created, on one hand, multiple connections at the crossing points of the absorbent fibres, which remained stable and, on the other hand, a network of pores which intercommunicate in all directions and are constituted by spaces left empty upon the melting of the thermofusible fibres.
This process is applicable in particular to the production of a filtering structure for cigarette filters.
REFERENCES:
patent: 2916038 (1959-12-01), Wade
patent: 3039908 (1962-06-01), Parmele
patent: 3229008 (1966-01-01), Harrington et al.
patent: 3297041 (1967-01-01), Sproull et al.
Chem. Abstracts, vol. 90, No. 23, 6/79, Ref. 183447b, p. 362 and JP-A-78-145,999; Ref. 183445z, p. 362 and JP-A-78-145,998.
Job, anciens Ets Bardou Job & Pauilac
Millin V.
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