-
1.发明授权Biaxially oriented unidirectionally long polyethylene-2, 6-naphthalenedicarboxylate film 失效双轴取向单向长聚乙烯-2,6-萘二甲酸酯薄膜
公开(公告)号：US5470665A
公开(公告)日：1995-11-28
申请号：US414137
申请日：1995-03-30
CPC分类号： C08J5/18 , G11B5/73 , C08J2367/02 , Y10S428/91 , Y10T428/24355 , Y10T428/265 , Y10T428/31681 , Y10T428/31786
摘要： Provided is a biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film having the following characteristic properties;(A) both the Young's modulus in the longitudinal direction and the Young's modulus in the transverse direction are at least 600 kg/mm.sup.2, and the Young's modulus in the longitudinal direction is greater than the Young's modulus in the transverse direction,(B) the heat shrinkage factor in the transverse direction when the film has been treated under no load at 105.degree. C. for 30 minutes is at least 1%, and(C) the surface roughness Ra of one surface of the film is up to 5 nm, anda magnetic recording tape obtained by forming a thin magnetic metal film on the above film undergoes no curling, has high coercive force, has excellent electromagnetic conversion characteristic and permits high-density recording for a long period of time.
摘要翻译： 本发明提供具有以下特征的双轴取向单向长聚乙烯-2,6-萘二甲酸酯薄膜; （A）长度方向的杨氏模量和横向的杨氏模量均为600kg / mm2以上，纵向的杨氏模量大于横向的杨氏模量，（B） 当薄膜在无负载下在105℃下处理30分钟时，横向的热收缩系数至少为1％，（C）薄膜的一个表面的表面粗糙度Ra达5nm， 并且通过在上述膜上形成薄磁性金属膜而获得的磁记录带不会发生卷曲，具有高的矫顽力，具有优异的电磁转换特性并且允许长时间的高密度记录。
-
2.发明授权Biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film 失效双轴取向，单向长度聚乙烯-2,6-萘二甲酸酯薄膜
公开(公告)号：US5677033A
公开(公告)日：1997-10-14
申请号：US453774
申请日：1995-05-30
CPC分类号： G11B5/73 , Y10T428/24355 , Y10T428/265 , Y10T428/31786
摘要： Provided is a biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film having the following characteristic properties; (A) both the Young's modulus in the longitudinal direction and the Young's modulus in the transverse direction are at least 600 kg/mm.sup.2, and the Young's modulus in the longitudinal direction is greater than the Young's modulus in the transverse direction, (B) the heat shrinkage factor in the transverse direction when the film has been treated under no load at 105.degree. C. for 30 minutes is at least 1%, and (C) the surface roughness Ra of one surface of the film is up to 5 nm, and a magnetic recording tape obtained by forming a thin magnetic metal film on the above film undergoes no curling, has high coercive force, has excellent electromagnetic conversion characteristic and permits high-density recording for a long period of time.
摘要翻译： 本发明提供具有以下特征的双轴取向单向长聚乙烯-2,6-萘二甲酸酯薄膜; （A）长度方向的杨氏模量和横向的杨氏模量均为600kg / mm2以上，纵向的杨氏模量大于横向的杨氏模量，（B） 当薄膜在无负载下在105℃下处理30分钟时，横向的热收缩系数至少为1％，（C）薄膜的一个表面的表面粗糙度Ra达5nm， 并且通过在上述膜上形成薄磁性金属膜而获得的磁记录带不会发生卷曲，具有高的矫顽力，具有优异的电磁转换特性并且允许长时间的高密度记录。
-
搜索结果
2 条记录 (耗时 0.015 秒)