Scale-up Rule of Double Bubble Tubular Film Production Process for Nylon6 Film
Masao Takashige, Toshitaka KANAI, Toshiro Yamada
Idemitsu Petrochemical Co., Ltd.
Japan

Keywords: Double Bubble Tubular Film, Nylon6, Scale-up

---

The analysis of scale-up rule for the double bubble tubular film process of nylon6 was investigated.
The applicability of the scale-up rule which was set up theoretically was evaluated by using both the small scale test machine and the large scale production machine under the conditions of controlling the relationship between output rate and film width etc. according to the scale-up rule, namely bubble radius R, film thickness H and output rate Q for the small scale test machine and KR, LH and K2LQ for the large scale production machine respectively.
Both small scale test machine and large scale production one showed the same stretching stability, the equivalent stretching stresses and the equivalent birefringence pattern. In the observation through the polarizing plate of the bubble sample which shows deformation pattern, the equality of deformation pattern was also confirmed.
It is found that the scale-up rule which was set up theoretically is applicable to predict the physical properties and bubble stability for large scale double bubble tubular film process once the experiment is carried out by using the small scale machine and a small amount of resi