Water-soluble film and package
AssigneeKuraray Co., Ltd.
InventorsMinoru Okamoto, Sayaka Shimizu, Osamu Kazeto
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Abstract
There is provided a water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in the longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in the transverse direction. This allows provision of a water-soluble film that can be suitably used for manufacturing a package with excellent uniformity of seal strength, even for manufacturing a package with excellent uniformity of seal strength during high-speed sealing; and a package using the film.
Claims20
A water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in a longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in a transverse direction.
A package in which a water-soluble film is used for storing chemicals, wherein the water-soluble film contains polyvinyl alcohol resin, and a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in a longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in a transverse direction.
Dependencies are inferred from the claim text.