BIAXIALLY STRETCHED FILM, LAMINATE, AND ECO-FRIENDLY PACKAGING MATERIAL COMPRISING FILM

The present invention relates to a biaxially stretched film containing polylactic acid (PLA) and polyhydroxy alkanoate (PHA), a laminate, and an eco-friendly packaging material comprising the film. Specifically, the biaxially stretched film of the present invention contains a specific range of content of PHA and satisfies a specific range of flexibility-noise complex index (LSN), and thus can improve optical and thermal characteristics and reduce the degree of noise, while having excellent strength and flexibility. In addition, the laminate of the present invention comprises first and second layers having a specific composition and thus can attain the improvement in the above characteristics and maintain excellent interlayer adhesive characteristics due to interlayer compatibility of the first and second layers. Therefore, the biaxially stretched film and the laminate can be utilized as packaging materials in various fields, thereby providing high-quality packaging materials.