Degradable polymeric compositions and articles comprising same
US-2024425683-A1 · Dec 26, 2024 · US
Polyvinyl acetal film excellent in transparency and suppressing thermal cracking phenomenon
US2016159997A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016159997-A1 |
| Application number | US-201314908997-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 31, 2013 |
| Priority date | Jul 31, 2013 |
| Publication date | Jun 9, 2016 |
| Grant date | — |
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Abstract
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An object is to provide a polyvinyl acetal film which has excellent transparency and can suppress a thermal cracking phenomenon. The above object is achieved by providing a polyvinyl acetal film in which a ratio between a composite modulus (GPa) of the highest part in a convex part and a composite modulus (GPa) of the lowest part in a concave part on a surface of a film on a side in contact with glass, calculated by a nanoindentation measurement using a scanning probe microscope, is 0.90 or less, when a laminated glass is formed. In addition, the above object is achieved by providing a polyvinyl acetal film in which a ratio between a hardness (GPa) of the highest part in the convex part and a hardness (GPa) of the lowest part in the concave part, calculated by the SPM nanoindentation measurement, is 0.90 or less.
First claim
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1 . A polyvinyl acetal film comprising a polyvinyl acetal and a plasticizer, wherein at least one surface of the film has an uneven shape, and a ratio between a composite modulus (GPa) of a highest part in a convex part and a composite modulus (GPa) of a lowest part in a concave part, calculated by an SPM nanoindentation measurement, is 0.90 or less. 2 . The polyvinyl acetal film according to claim 1 , wherein a ratio between a hardness (GPa) of the highest part in the convex part and a hardness (GPa) of the lowest part in the concave part, calculated by an SPM nanoindentation measurement, is 0.90 or less. 3 . The polyvinyl acetal film according to claim 1 , wherein the surface of the film has a ten-point average surface roughness Rz of 30 μm or more. 4 . The polyvinyl acetal film according to claim 1 , wherein the ratio between the composite modulus (GPa) of the highest part in the convex part and the composite modulus (GPa) of the lowest part in the concave part is 0.70 or less. 5 . The polyvinyl acetal film according to claim 1 , wherein the ratio between the hardness (GPa) of the highest part in the convex part and the hardness (GPa) of the lowest part in the concave part is 0.70 or less. 6 . The polyvinyl acetal film according to claim 1 , wherein the ratio between the composite modulus (GPa) of the highest part in the convex part and the composite modulus (GPa) of the lowest part in the concave part is 0.40 or more. 7 . The polyvinyl acetal film according to claim 1 , wherein the ratio between the hardness (GPa) of the highest part in the convex part and the hardness (GPa) of the lowest part in the concave part is 0.50 or more. 8 . An interlayer film for laminated glass, made from the polyvinyl acetal film according to claim 1 . 9 . An encapsulant for a solar cell, made from the polyvinyl acetal film according to claim 1 . 10 . A laminated glass comprising the interlayer film for laminated glass according to claim 8 . 11 . A solar cell module comprising the encapsulant for a solar cell according to claim 9 .
Assignees
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Classifications
with polyalcohols · CPC title
containing vinyl acetal · CPC title
- C08J5/18Primary
Manufacture of films or sheets · CPC title
Plasticising macromolecular compounds (plasticisers C08K) · CPC title
Photovoltaic modules · CPC title
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- What does patent US2016159997A1 cover?
- An object is to provide a polyvinyl acetal film which has excellent transparency and can suppress a thermal cracking phenomenon. The above object is achieved by providing a polyvinyl acetal film in which a ratio between a composite modulus (GPa) of the highest part in a convex part and a composite modulus (GPa) of the lowest part in a concave part on a surface of a film on a side in conta…
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification C08J5/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jun 09 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).