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公开(公告)号：US11731410B2
公开(公告)日：2023-08-22
申请号：US17730277
申请日：2022-04-27
发明人： Yun-Hee Seo , Sang Hun Choi , Jung Hee Ki , Jin Woo Lee , Dae Seong Oh , Han Jun Kim , Sun Hwan Kim , Heung Sik Kim
CPC分类号： B32B27/34 , B32B7/12 , B32B27/08 , B32B27/20 , B32B27/281 , B32B27/308 , B32B2250/02 , B32B2250/24 , B32B2264/1021 , B32B2307/408 , B32B2307/412 , B32B2307/536 , B32B2307/538 , B32B2307/732 , B32B2333/08 , B32B2377/00 , B32B2457/202 , B32B2457/206
摘要： The embodiments relate to a polyamide-based composite film that has excellent curl characteristics, mechanical properties, and optical properties, as well as, in particular, is effective in preventing reflection in the visible light region, remarkably reduces the rainbow phenomenon, and achieves a texture similar to that of glass, and a display device comprising the same. There are provided a polyamide-based composite film, which comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein the in-plane retardation (Re) measured with light having a wavelength of 550 nm is 100 nm to 220 nm, and a display device comprising the same.
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公开(公告)号：US12024605B2
公开(公告)日：2024-07-02
申请号：US17433978
申请日：2021-04-20
发明人： Sang Hun Choi , Dae Seong Oh , Han Jun Kim , Sun Hwan Kim , Jin Woo Lee , Heung Sik Kim , Jung Hee Ki , Yun Hee Seo
CPC分类号： C08J5/18 , C08K3/30 , G02B1/14 , C08J2377/06 , C08K2003/3045 , C08K2201/005 , C08K2201/011
摘要： The embodiments relate to a polyamide-based composite film with excellent curl characteristics, mechanical characteristics, and optical characteristics. The polyamide-based composite film comprises a base film comprising a polyamide-based polymer and a functional layer disposed on the base film, wherein when the polyamide-based composite film is placed on a surface light source such that the base film is in contact with the surface light source, light is irradiated from the surface light source, and the luminance value measured in the normal direction of the surface light source is 100%, the luminance value measured in the direction of 50° from the normal direction of the surface light source is 25% or more.
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公开(公告)号：US11820874B2
公开(公告)日：2023-11-21
申请号：US16913300
申请日：2020-06-26
发明人： Sang Hun Choi , Jin Woo Lee , Dae Seong Oh , Jung Hee Ki , Sunhwan Kim , Han Jun Kim , Heung Sik Kim
CPC分类号： C08J5/18 , C08G69/265 , C08G73/14 , C08K3/30 , G02B1/00 , C08J2377/06 , C08K2003/3045 , C08K2201/003 , C08K2201/011 , C08K2201/019 , G02F1/13363
摘要： Embodiments relate to a polyamide-based film that is colorless and transparent, is excellent in mechanical properties and optical properties, has a wide angle of view by securing at least a certain level of luminance at various angles, and, in particular, has gloss characteristics similar to those of glass, a process for preparing the same, and a cover window comprising the same. The polyamide-based film comprises a polyamide-based polymer, wherein when the polyamide-based film is placed on a surface light source, light is irradiated from the surface light source, and the luminance value (L0) measured in the normal direction of the surface light source is 100%, the luminance value (L50) measured in the direction of 50° from the normal direction of the surface light source is 25% or more.
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公开(公告)号：US11713378B2
公开(公告)日：2023-08-01
申请号：US16912908
申请日：2020-06-26
发明人： Jung Hee Ki , Sunhwan Kim , Dae Seong Oh , Jin Woo Lee , Sang Hun Choi , Han Jun Kim , Heung Sik Kim
IPC分类号： C08J5/18
CPC分类号： C08J5/18 , C08J2377/00 , C08J2379/08
摘要： The polymer film according to an embodiment comprises at least one polymer resin selected from the group consisting of a polyamide-based resin, a polyimide-based resin, and a polyamide-imide-based resin, and has a haze of 0.6% or less and an in-plane retardation within a specific range for each wavelength band in the visible light region.
The polymer film, which has an in-plane retardation within a specific range for each wavelength band in the visible light region, is excellent in transparency and optical properties, and it can remarkably reduce the rainbow phenomenon and improve the reflection appearance.-
公开(公告)号：US12084575B2
公开(公告)日：2024-09-10
申请号：US17577919
申请日：2022-01-18
发明人： Sang Hun Choi , Jin Woo Lee , Jung Hee Ki , Dae Seong Oh , Han Jun Kim , Sun Hwan Kim , Heung Sik Kim
CPC分类号： C08L79/08 , B32B27/281 , C08G73/1039 , C08G73/14 , C08J5/18 , C08K3/30 , C08K3/36 , B32B2264/025 , B32B2264/1021 , B32B2264/104 , B32B2264/301 , B32B2264/302 , B32B2307/412 , B32B2457/20 , C08K2003/3045 , C08K2201/003 , C08K2201/009 , C08K2201/011 , C08L2203/20 , C08K3/30 , C08L79/08
摘要： The embodiments relate to a polyamide-imide film excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-imide film, which comprises a polyamide-imide polymer and has a reduced modulus of a top surface measured by the nanoindentation method according to the ISO 14577-2 standard of 5.6 GPa or more and a haze of 1% or less, a process for preparing the same, and a cover window and a display device comprising the same.
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公开(公告)号：US11795283B2
公开(公告)日：2023-10-24
申请号：US17495078
申请日：2021-10-06
发明人： Dae Seong Oh , Han Jun Kim , Sun Hwan Kim , Jin Woo Lee , Heung Sik Kim
IPC分类号： C08J5/18
CPC分类号： C08J5/18 , C08J2377/06
摘要： The embodiments relate to a polyamide-based film excellent in optical properties, mechanical properties, and processing suitability and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-base polymer, wherein a dipolar solvent compatibility represented by the following equation is 18.5 to 24: Dipolar solvent compatibility=√{square root over ((σd−δ1d)2+(σp−δ1p)2)}. In the equation, σd is a value of a dispersible component in surface energy of the polyamide-based film, σp is a value of a polar component in surface energy of the polyamide-based film, δ1d is a value of a dispersible component in Hansen solubility parameter of the dipolar solvent, and δ1p a value of a dipolar component in Hansen solubility parameter of the dipolar solvent.
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公开(公告)号：US12071526B2
公开(公告)日：2024-08-27
申请号：US17480396
申请日：2021-09-21
发明人： Han Jun Kim , Jin Woo Lee , Dae Seong Oh , Sun Hwan Kim , Heung Sik Kim , Joo Young Jung
CPC分类号： C08J5/18 , C08J2377/06 , G02B1/14
摘要： The embodiments relate to a polyamide-based film excellent in optical properties such as transmittance, haze, and yellow index and mechanical properties such as modulus and thickness uniformity, to a process for preparing the same, and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-based polymer and has an XRD pattern comprising a first peak whose highest point is located in a section where 2θ is 14° to 16°.
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