The distance from the die face to where solidification takes place is called the frost-line-height (FLH).
The effects of FLH, DDR, BUR, and haze-zone region on the EWF parameters of m-LLDPE films were determined.
The sample locations were determined by the local haziness and FLH. The DENT test of m-LLDPE thin films was conducted with the custom-built film fixture , After putting the m-LLDPE thin film in the fixture, a fresh razor blade was used to prepare the notches in the specimen.
The effect of FLH and crystallization-induced haze on the EWF behavior was determined using m-LLDPE films with thicknesses of 0.030 mm made using 2.5 BUR.
All test specimens selected for the DENT testing had a FLH of 0.483 m, except as indicated in Table 2.
As noted for contact rates, sea whip disturbance rates, although very low with the no-groundline footrope, were variable among hauls and depended somewhat on FLH (Fig.
Although the disturbance rate was somewhat higher when FLH was reduced (Fig.
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It is noted that the (110) reflection appear as a broad azimuthal peak near the frost- line height (FLH) (~76 cm) but at higher distances, and the reflection tends to show a maximum that is about 25 from the equator.
It is also important to note that significant orientation occurs past the FLH, even after the bubble has solidified.
The orientation profiles are consistent with earlier polarized Raman spectroscopy results (6) and small -angle light scattering (26), and confirm that orientation takes place even past the FLH during the film blowing process.