| 发明名称 |
FILM AUS POLYETHYLEN-2,6-NAPHTHALENDICARBOXYLAT |
| 摘要 |
<p>A biaxially oriented polyethylene 2,6-naphthalenedicarboxylate film which is usable as a base film for magnetic recording media capable of high-density recording, in particular, magnetic tape, characterized in that the numbers of protrusions formed on the surface of the film and meeting the conditions that 1 </= h < 50 (wherein h is the height, nm, of the protrusion), 50 </= h < 100 and 100 </= h fall each within a specified range, that the planar orientation coefficient (NS) and means refractive index (na) of the film satisfy the relation NS >/= 1.607na - 2.434, that the surface roughness (Ra) of the film ranges from 2 to 10 mm, and that the longitudinal heat shrinkage is 0.08 % or less when the film is heat treated at 70 DEG C for 1 hour without any load added.</p> |
| 申请公布号 |
DE69213922(T2) |
申请公布日期 |
1997.02.20 |
| 申请号 |
DE1992613922T |
申请日期 |
1992.10.30 |
| 申请人 |
TEIJIN LTD., OSAKA, JP |
发明人 |
CHUUJOU TAKAO, CHUUJOU TAKAO, SAGAMIHARA-SHI KANAGAWA 229, JP;HOSOI, MASAHIRO, NERIMA-KU TOKYO 177, JP;KOBAYASHI, IEYASU, SAGAMIHARA-SHI KANAGAWA 229, JP;SAEKI, YASUHIRO, SAGAMIHARA-SHI KANAGAWA 229, JP |
| 分类号 |
B29C55/12;B29K67/00;B29L7/00;C08G63/181;C08G63/189;C08J5/18;C08L67/02;G11B5/73;(IPC1-7):C08J5/18;C08K3/36;G11B5/704 |
主分类号 |
B29C55/12 |
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