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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   January-February 2003 , Volume 12 , Number 1; Page(s) 51 To 55.
 
Paper: 

STANDARDIZATION OF POLYETHYLENE TREATMENT LEVEL USING A MATHEMETICAL MODEL

 
 
Author(s):  BHALA M.*, DUBE L.
 
* Department of Applied Chemistry, National University of Science and Technology,Bulawayo, Zimbabwe
 
Abstract: 

A corona discharge treatment of low-density polyethylene film (LDPE) was carried out in preparation for flexographic printing. Such treatment of the PE film is necessary if maximum adhesion of ink is to be achieved. This project involved three different treating machines for which the current had to be manipulated in all the machines so that a standard treatment could be accomplished. Using a mathematical relation, current requirements for each machine were calculated and used to standardize treatment level of PE films. Standardization was achieved by controlling input current in all the three machines so as to attain a treatment level of 38 dynes/cm. This level of treatment showed the best results in adhesion of ink to the PE film during printing. The exercise also confirmed that printing must be carried out within 24 hours of treatment since the level of treatment deteriorates with time

 
Keyword(s): TREATMENT LEVEL, STANDARD TREATMENT, TREATMENT LOSS, OPERATING CURRENT, LINE SPEED
 
References: 
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