초록 ▼

Moisture-proof polypropylene film package materials for packaging unit cases in lots, especially for photographic roll film small cases, comprising: (a) a biaxially-stretched polypropylene film substrate having, (i) stretching of 2 to 15 times, (ii) the thermal contraction both in longitudinal and t

Moisture-proof polypropylene film package materials for packaging unit cases in lots, especially for photographic roll film small cases, comprising: (a) a biaxially-stretched polypropylene film substrate having, (i) stretching of 2 to 15 times, (ii) the thermal contraction both in longitudinal and transverse directions of 2-8%, and (iii) the relative ratio of thermal contraction in both directions of 40% or less, (b) polyvinylidene chloride resin coating applied onto at least one surface of the film substrate, and (c) an antistatic agent incorporated in at least one of layers.

대표청구항 ▼

A package material for wrapping unit cases in a bundle which comprises: (a) a biaxially-stretched polypropylene film substrate having a stretching magnification of 2-15 times, coefficients of the thermal contraction both in the longitudinal and transverse directions of 2-8%, and a relative ratio of

A package material for wrapping unit cases in a bundle which comprises: (a) a biaxially-stretched polypropylene film substrate having a stretching magnification of 2-15 times, coefficients of the thermal contraction both in the longitudinal and transverse directions of 2-8%, and a relative ratio of the coefficients of the thermal contraction in the longitudinal and transverse directions of 40% or less; (b) polyvinylidene chloride resin coating applied onto at least one surface of the polypropylene film substrate; and (c) an antistatic agent incorporated in at least one of the layers constituting the package material.