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公开(公告)号：US12071524B2
公开(公告)日：2024-08-27
申请号：US17360040
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto , Mitsunori Asada
CPC classification number: C08J5/18 , C08J2329/04
Abstract: A water-soluble film is provided that is capable of achieving deformation resistance during pouch storage as well as excellent water solubility of the film and excellent reduction in undissolved residues. A water-soluble film includes a polyvinyl alcohol-based resin, wherein a crystal long period Ds obtained from an X-ray profile obtained by small-angle X-ray scattering measurement in a water/methanol mixed solvent (volume ratio: 2/8) is from 10.0 to 30.0 nm and a rate of increase (DS−Da)/Da of the crystal long period Ds to a crystal long period Da obtained by small-angle X-ray scattering measurement before immersion in the solvent is 30% or more and 130% or less.
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公开(公告)号：US12049546B2
公开(公告)日：2024-07-30
申请号：US17360098
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
CPC classification number: C08J5/18 , B41M5/502 , B65D65/42 , B65D65/46 , C08J2329/04 , C08J2331/04 , C08K5/053
Abstract: The present invention provides a monolayer base film for hydraulic transfer printing that is excellent in water solubility and allows high resolution transfer printing without rupture even in high speed printing and a film for hydraulic transfer printing using the same. The present invention is a base film for hydraulic transfer printing comprising a polyvinyl alcohol resin, the base film forming a printing layer to be transferred to an article by hydraulic transfer printing. In this base film for hydraulic transfer printing, the base film for hydraulic transfer printing has an amount (A1) of crystalline component of 60% or less and an amount (A2) of constrained amorphous component from 10% to 50%, the amounts being obtained from a spin-spin relaxation curve by 1H pulse NMR measurement of the base film in deuterated methanol, and a moisture content from 1 to 5 mass %.
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公开(公告)号：US20230257536A1
公开(公告)日：2023-08-17
申请号：US18003791
申请日：2021-06-14
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
CPC classification number: C08J5/18 , C08K5/17 , C08K3/34 , C11D17/043 , C11D3/3956 , C08J2329/04 , C08K2003/343
Abstract: [Problem to be solved] To provide a water-soluble film having good transparency and good releasability from a support with less surfactant content.
[Solution] A water-soluble film containing a polyvinyl alcohol resin and surfactant, wherein a content of the surfactant is 0.005 to 1 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol resin, and a ratio S(0)/S(32) of an abundance amount S(0) of the surfactant on at least one surface of the water-soluble film to an abundance amount S(32) of the surfactant on a cross-section surface at a depth of 32 nm from the at least one surface of the water-soluble film, measured by a count number of fragment ions derived from the surfactant detected by time-of-flight secondary ion mass spectrometry on the at least one surface of the water-soluble film, is in the range of 100 to 500.-
公开(公告)号：US20210324162A1
公开(公告)日：2021-10-21
申请号：US17360055
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto , Mitsunori Asada
Abstract: A water-soluble film is provided that is excellent in film transparency and water solubility and inhibits sticking between the films. A water-soluble film includes a polyvinyl alcohol resin, wherein a crystallite size obtained from an X-ray profile obtained by wide-angle X-ray measurement is from 4.0 to 5.5 nm and a degree of crystallization obtained from the X-ray profile is from 10.0% to 25.0%, and an external haze is from 7.0% to 30.0%.
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公开(公告)号：US20210324159A1
公开(公告)日：2021-10-21
申请号：US17360004
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
Abstract: Provided are a water-soluble film capable of inhibiting sticking between the films while maintaining excellent water solubility and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated using a diamond prism is Fd1 and a crystallinity index calculated using a germanium prism is Fg1 for FT-IR measurement of a first surface of the water-soluble film by ATR technique, Fd1 and Fg1 are Fd1≤0.65 and Fd1/Fg1
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Patent Agency Ranking
公开(公告)号：US12286514B2
公开(公告)日：2025-04-29
申请号：US17360018
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
Abstract: Provided are a water-soluble PVA film having good water sealing properties in addition to excellent water solubility while maintaining mechanical strength of the water-soluble PVA film and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated using a diamond prism is Fd1 and a crystallinity index calculated using a germanium prism is Fg1 for FT-IR measurement of a first surface of the water-soluble film by ATR technique, Fd1 and Fg1 are 0.25≤Fd1≤0.65 and Fd1/Fg1>1. Fd1 and Fg1 are preferably Fd1/Fg1≤1.5.
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公开(公告)号：US20240254294A9
公开(公告)日：2024-08-01
申请号：US17360040
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto , Mitsunori Asada
IPC: C08J5/18
CPC classification number: C08J5/18 , C08J2329/04
Abstract: A water-soluble film is provided that is capable of achieving deformation resistance during pouch storage as well as excellent water solubility of the film and excellent reduction in undissolved residues. A water-soluble film includes a polyvinyl alcohol-based resin, wherein a crystal long period Ds obtained from an X-ray profile obtained by small-angle X-ray scattering measurement in a water/methanol mixed solvent (volume ratio: 2/8) is from 10.0 to 30.0 nm and a rate of increase (DS−Da)/Da of the crystal long period Ds to a crystal long period Da obtained by small-angle X-ray scattering measurement before immersion in the solvent is 30% or more and 130% or less.
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公开(公告)号：US20230312846A1
公开(公告)日：2023-10-05
申请号：US18003782
申请日：2021-06-14
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
CPC classification number: C08J5/18 , B65D65/46 , C08J2329/04
Abstract: [Problem to be solved] To provide a water-soluble film capable of achieving both cold water solubility and resistance to oxidative deterioration.
[Solution] A water-soluble film containing a polyvinyl alcohol resin, wherein the water-soluble film has a surface on at least one side in which an abundance ratio of carbonyl in all carbon bonds obtained by X-ray photoelectron spectroscopy is 1 to 5%, and a complete dissolution time in water at 10° C. is 120 seconds or less.-
公开(公告)号：US20230257535A1
公开(公告)日：2023-08-17
申请号：US18003785
申请日：2021-06-14
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
IPC: C08J5/18
CPC classification number: C08J5/18 , C08J2329/04 , C08J2300/14
Abstract: [Problem to be solved] To provide a water-soluble film excellent in high-speed heat-sealing property while maintaining excellent solubility in water, and a package using the same.
[Solution] A water-soluble film of the present invention is a water-soluble film containing a polyvinyl alcohol resin, wherein after conditioning the water-soluble film at a temperature of 20° C. and a relative humidity of 60% for 24 hours, a first melting temperature Tm1 obtained from a melting curve when the temperature of the water-soluble film is raised to 200° C. at 500° C./sec and a second melting temperature Tm2 obtained from a melting curve when the temperature of the water-soluble film is cooled to 0° C. at 100° C./sec after a temperature rise and the temperature of the water-soluble film is again raised to 200° C. at 100° C./sec satisfy relationships of the following formulas (1) and (2).
105° C.≤Tm1≤165° C. (1)
Tm2−Tm1≥20° C. (2)-
公开(公告)号：US20230257174A1
公开(公告)日：2023-08-17
申请号：US18003797
申请日：2021-06-14
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
IPC: B65D65/46 , B65D65/42 , C08J5/18 , C08F218/08
CPC classification number: B65D65/46 , B65D65/42 , C08J5/18 , C08F218/08
Abstract: [Problem to be solved] To provide a water-soluble film capable of suppressing formation of holes when used as a package while maintaining water solubility, and a package using such a water-soluble film.
[Solution] A water-soluble film containing a polyvinyl alcohol resin, wherein within a square A1 with a side of 1 cm or more and 5 cm or less positioned at an arbitrary location on at least one surface of the water-soluble film, each side of an area of square A2 with a side of 5 μm is divided into 64 to divide the entire area into 4096 pixels, and when elastic moduli of the pixels are measured by an atomic force microscope, a number average value of the elastic moduli of the pixels is 1 to 200 MPa, and a coefficient of variation of the elastic moduli of the pixels is 0.1 to 0.7.
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