CORESTA Meeting, Smoke/Technology, Hamburg, 1997, ST02

Determination of hot collapse on filters and cigarette rods performed with a new device

Heinr. Borgwaldt Technik GmbH, Hamburg, Germany
The hot collapse (HC) both on filters and on tobacco rods during smoking (HDS) is of great importance when developing new cigarettes. Already in 1988 a CORESTA task force had investigated the matter. The results of the study including some recommendations about the design of a suitable hot collapse tester were published in 1991. However, since no device could meet the requirements shown in the CORESTA study, no final collaborative study was made at that time. On the recommendation of the CORESTA, the smoking of cigarettes should be performed in compliance with the CORESTA Methods N° 22, 23 and 25. Between puffs the distance from loading stamp to char coal line as well as the deformation of the cigarettes have to be determined. In view of these recommendations BORGWALDT developed the HC Tester R 72 in 1995. On the one hand, this device comprises a new one-channel smoking machine which smoked cigarettes in compliance with CORESTA Methods N° 22, 23 and 25. On the other hand, the instrument comprises a loading system equipped with an integrated displacement transducer. The distance between loading stamp position and char coal line is determined by a moving IR-sensor. First trials applied on the CORESTA Monitor Cigarettes CM 2 have been made with the HC-Tester R 72. The hot collapse of filters and tobacco rods have been measured on fifty cigarettes each. The measurements have been analysed in compliance with methods used by the CORESTA task force. A good reproducibility of the HC Tester R 72 has been proved. Under these circumstances the subject "Hot Collapse" may be of interest for a new CORESTA task force.