Improvement of processing parameters by using processing aids during the linear low-density polyethylene film blowing process

2010 ◽  
Vol 16 (1) ◽  
pp. 78-83
Author(s):  
Abbas Fatehi ◽  
Naser Sharifi Sanjani
Keyword(s):  
Processing Parameters ◽  
Polyethylene Film ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Film Blowing ◽  
Processing Aids

Film blowing of linear low-density polyethylene blended with a novel hyperbranched polymer processing aid

Polymer ◽  
2000 ◽  
Vol 41 (21) ◽  
pp. 7705-7713 ◽  
Author(s):  
Y Hong ◽  
S.J Coombs ◽  
J.J Cooper-White ◽  
M.E Mackay ◽  
C.J Hawker ◽  
...  
Keyword(s):  
Hyperbranched Polymer ◽  
Polymer Processing ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Film Blowing

Multi-scale phenomena induced by fluoropolymer processing aids during the extrusion of linear-low density polyethylene

2011 ◽  
Vol 166 (1-2) ◽  
pp. 1-11 ◽  
Author(s):  
C. Dubrocq-Baritaud ◽  
E. Darque-Ceretti ◽  
B. Vergnes
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Multi Scale ◽  
Processing Aids

Experimental and Numerical Investigation Into Metallocene Polymer Melt Flow in Film Blowing Dies

2002 ◽  
Vol 12 (3) ◽  
pp. 126-132 ◽  
Author(s):  
M. Zatloukal ◽  
J. Vlcek ◽  
A. Slaník ◽  
A. Lengálová ◽  
J. Simoník
Keyword(s):  
Process Simulation ◽  
Polymer Melt ◽  
Flow Instabilities ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Film Blowing ◽  
Rheological Measurements ◽  
Flow Phenomena ◽  
Frequent Problem

Abstract A frequent problem in the production of metallocene linear low-density polyethylene (mLLDPE) films is the occur-rence of flow instabilities, e.g. sharkskin, or degradation of material, which limit the production rate and decrease the product quality. If such problems arise, the question is what causes these phenomena and how they can be avoided. With the aim of understanding these problems and providing some guidelines for their suppression, rheological measurements together with modelling of these melt flows are often employed. In the present study, flow behaviour of two commercially available mLLDPEs was determined and used for the process simulation. The paper shows that the capillary-rheology data together with 2D finite element method can be used for the prediction of sharkskin phenomenon as well as degradation of mLLDPE melts in film blowing dies. It also reveals that the degradation of the materials in these dies can be quantified through wall shear stress. Finally, the paper describes how these findings can help optimize the flow channel in the film blowing die to avoid the undesirable flow phenomena.

The use of thermoplastic elastomers as polymer processing aids in processing of linear low density polyethylene

2010 ◽  
Vol 52 (11) ◽  
pp. 1163-1170 ◽  
Author(s):  
M. Müller ◽  
O. Kulikov ◽  
K. Hornung ◽  
M. H. Wagner
Keyword(s):  
Thermoplastic Elastomers ◽  
Polymer Processing ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Processing Aids
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