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公开(公告)号：US20220135301A1
公开(公告)日：2022-05-05
申请号：US17574792
申请日：2022-01-13
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
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.
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公开(公告)号：US20210324164A1
公开(公告)日：2021-10-21
申请号：US17360098
申请日：2021-06-28
Applicant: KURARAY CO., LTD.
Inventor： Minoru Okamoto , Sayaka Shimizu , Osamu Kazeto
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：US20210324161A1
公开(公告)日：2021-10-21
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
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：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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Patent Agency Ranking
公开(公告)号：US20230323047A1
公开(公告)日：2023-10-12
申请号：US18036640
申请日：2022-09-30
Applicant: KURARAY CO., LTD.
Inventor： Osamu Kazeto , Masahiro Takafuji
CPC classification number: C08J5/18 , C08K5/053 , C08J2329/04 , C08J2300/14
Abstract: The present disclosure relates to a water-soluble film comprising polyvinyl alcohol having a polymerization degree of 100 to 3,000 and a polyhydric alcohol plasticizer.
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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.-
公开(公告)号：US20210347094A1
公开(公告)日：2021-11-11
申请号：US17274261
申请日：2019-09-06
Applicant: KURARAY CO., LTD.
Inventor： Osamu Kazeto , Takashi Nerio , Masahiro Takafuji
IPC: B29C33/68
Abstract: Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded. The mold release film is a polyvinyl alcohol film and is characterized by being a polyvinyl alcohol mold release film for artificial marble molding use that satisfies the following formula (1). Due to this, it is possible to provide a polyvinyl alcohol mold release film for artificial marble molding use capable of, even in the production of wide artificial marble, suppressing wrinkles or curls generated at both end parts to prevent the surface shape of the resulting artificial marble from being defective, and simplifying the step of grinding and polishing artificial marble, and a method for producing artificial marble using the same. 4.6×10−3≥Δn(MD)0−1.4×10−3≥Δn(TD)0≥1.0×10−3 (1) in the formula (1), Δn(MD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film, and Δn(TD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.
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