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M. Imachi (1986)
Effect of bonding temperature on the interfacial bonding strength of polyethylene/polypropylene and other polymersJournal of Polymer Science: Polymer Letters Edition, 24
S. Mukhopadhyay, J. Hearle, P. Foster (1988)
A New Test Method for Studying the Thermo- bonding Behaviour of Synthetic FibresJournal of The Textile Institute, 79
P. Gibson, R. Mcgill (1987)
Thermally bondable polyester fiber: the effect of calender temperatureTappi Journal, 70
Polypropylene filaments were spun from a mixture of PP chips of two different Melt Flow Index (MFI) (3 MFI and 35 MFI). A significant difference was observed in the melting characteristics of the resultant filaments from either of the individual components as observed from the DSC. The main difference being in the degree of melting achieved at any temperature in the initial stages of the melting range, which was found to be higher in case of the filaments spun from the blend. These filaments were then thermally bonded using silicon oil bath and heated roller method. Subsequently the bond strength of the filaments was measured on the Instron Tensile Tester using the loop technique. The values of the bond strengths obtained from the blend were compared with those made from the individual component. It was found that the bond strength of the bonds obtained from the blended filament at a given temperature was higher than that of the bonds made from the filaments of either of the individual components, which is also suggested by the DSC curves. The difference in the bond strength was found to be as high as 25% in case of the blend with 60:40 composition ratios of the 3 MFI and 35 MFI components respectively.
Fibers and Polymers – Springer Journals
Published: Mar 1, 2002
Keywords: Polypropylene; Thermal bonding; Silicon roller method; Heated roller method; Loop test
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