公开(公告)号：US11939441B2

公开(公告)日：2024-03-26

申请号：US18036639

申请日：2022-09-30

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Masahiro Takafuji

IPC: C11D17/00 ,  C08F16/06 ,  C08J5/18 ,  C08K5/053 ,  C08L29/04

CPC classification number: C08J5/18 ,  C08K5/053 ,  C08F16/06 ,  C08J2300/14 ,  C08J2329/04 ,  C11D17/00 ,  C08L29/04 ,  C08L2203/16 ,  C11D17/00 ,  C08K5/053

Abstract: The present disclosure relates to a water-soluble film with polyvinyl alcohol having a polymerization degree of 100 to 3,000 and a polyhydric alcohol plasticizer.

公开(公告)号：US20230250245A1

公开(公告)日：2023-08-10

申请号：US18003793

申请日：2021-06-14

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  C08J3/28

CPC classification number: C08J5/18 ,  C08J3/28 ,  C08J2329/04

Abstract: [Problem to be solved] To provide a water-soluble film that is excellent in high-speed printability and moisture resistance.
[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 carbon-oxygen single bond (C—O) in all carbon element bonds obtained by X-ray photoelectron spectroscopy is in the range of 75 to 85%.

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

IPC: B65D65/46 ,  C08J5/18 ,  B29C41/00 ,  B29C41/46

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.

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

IPC: C08J5/18 ,  B65D65/42 ,  B41M5/50

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 %.

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.

公开(公告)号：US12234333B2

公开(公告)日：2025-02-25

申请号：US17359991

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  A01N25/10 ,  A01N25/34 ,  B65D65/46 ,  C11D3/37 ,  C11D17/04

Abstract: Provided are a water-soluble film preferably used for production of a package that has excellent surface gloss and has excellent anti-blocking properties, and a package using the same. A water-soluble film includes a polyvinyl alcohol resin, wherein the water-soluble film has a glossy surface with an average height SRc(G) of 1.8 μm or less and a maximum height SRz(G) of 20 μm or more and 50 μm or less.

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

IPC: C08J5/18 ,  C08L29/04

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.

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

IPC: C08J5/18 ,  B41M5/50 ,  B65D65/42 ,  B65D65/46 ,  C08K5/053

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 %.

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

IPC: C08J5/18 ,  C08K5/17 ,  C08K3/34 ,  C11D17/04 ,  C11D3/395

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

IPC: C08J5/18 ,  C08K5/053 ,  B65D65/46

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%.