公开(公告)号：US20160159997A1

公开(公告)日：2016-06-09

申请号：US14908997

申请日：2013-07-31

Applicant: KURARAY CO., LTD.

Inventor： Taiga YUI ,  Takeshi KUSUDOU ,  Sachiko TAKASHITA ,  Mitsunori ASADA

IPC: C08J5/18 ,  C08K5/103

CPC classification number: C08J5/18 ,  B32B17/10577 ,  B32B17/10761 ,  B32B2457/12 ,  C08J3/18 ,  C08J2329/14 ,  C08K5/103

Abstract: 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.

Abstract translation: 本发明的目的是提供一种聚乙烯醇缩醛膜，其具有优异的透明性并且可以抑制热裂纹现象。 上述目的通过提供一种聚乙烯醇缩醛膜实现，其中凸部中最高部分的复合模量（GPa）与表面上的凹部中最低部分的复合模量（GPa）之比 通过使用扫描探针显微镜的纳米压痕测定计算出的与玻璃接触的一侧的膜的厚度为0.90以下。 另外，上述目的通过提供一种聚乙烯醇缩醛膜来实现，其中凸部中最高部分的硬度（GPa）与凹部中最低部分的硬度（GPa）之比由 SPM纳米压痕测量值为0.90以下。