Abstract:The films, after orientation, are anisotropic with regard to their mechanical properties. An oriented film has a higher modulus of elasticity along the axis of orientation than perpendicular to this axis. At an intermediate angle, the modulus has an intermediate value.It is, of course, well known that plasticized polyvinyl chloride becomes somewhat anisotropic in certain forming operations such as calendering, extrusion, etc. However, in such operations there is ordinarily an opportunity for a considerable amo… Show more
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