volume 34, issue 12, P1016-1024 1994
DOI: 10.1002/pen.760341211
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Abstract: Abstract The mechanical properties of isotactic polypropylene can be enhanced in one direction by a combination of rolling and drawing in a rolling mill. The longitudinal strength and modulus of the oriented polypropylene (OPP) increases with an increase in draw ratio; however, the transverse properties remain relatively unchanged. In this study, multidirectional OPP laminates [with (0)2, (0/90)s and (0/±45)s lay‐ups] were made to obtain sheet materials with improved properties in more than one direction in t…

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