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US 12,319,798 B2Granted
Water-soluble film and packaging
AssigneeKuraray Co., Ltd.
InventorsMinoru Okamoto, Sayaka Shimizu, Osamu Kazeto
Life of this patent
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Abstract
There is provided a water-soluble film containing polyvinyl alcohol resin, wherein the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less; and ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less. As a result, a water-soluble film having excellent detachability from the support, as well as excellent transparency and sealing property, and a packaging body for chemicals may be provided using this film.
Claims20
A water-soluble film comprising:
- polyvinyl alcohol resin,
- wherein the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 23 mol % or less,
- the ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less,
- the ratio of fluorine element to the total amount of elements (F2S) found at the time of analyzing a second surface opposite the first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 23 mol % or less, and
- a difference between the F1S and the F2S does not exceed 22 mol %.
2 more elements
A packaging body comprising:
- a water-soluble film including polyvinyl alcohol resin,
- wherein the packaging body is configured to store a chemical,
- the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 23 mol % or less,
- the ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less,
- the ratio of fluorine element to the total amount of elements (F2S) found at the time of analyzing a second surface opposite the first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 23 mol % or less, and
- a difference between the F1S and the F2S does not exceed 22 mol %.
3 more elements
A water-soluble film comprising:
- polyvinyl alcohol resin,
- wherein the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less,
- wherein the ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less,
- wherein the ratio of fluorine element to the total amount of elements (F2S) found at the time of analyzing a second surface opposite the first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less,
- wherein the ratio of fluorine element to the total amount of elements (F2B) found at the time of analyzing a surface 0.1 μm deep from the second surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less, and
- wherein a difference between the F1S and the F2S is 2.5 mol % or greater.
3 more elements
A packaging body comprising:
- a water-soluble film including polyvinyl alcohol resin,
- wherein the packaging body is configured to store a chemical,
- wherein the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less,
- wherein the ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less,
- wherein the ratio of fluorine element to the total amount of elements (F2S) found at the time of analyzing a second surface opposite the first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less;
- and the ratio of fluorine element to the total amount of elements (F2B) found at the time of analyzing a surface 0.1 μm deep from the second surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less, and
- wherein a difference between the F1S and the F2S is 2.5 mol % or greater.
4 more elements
Dependencies are inferred from the claim text.