公开(公告)号：DE60029920D1

公开(公告)日：2006-09-21

申请号：DE60029920

申请日：2000-04-18

Applicant: TORAY INDUSTRIES

Inventor： SUGII HIKARU ,  KOTOURA MASAAKI ,  HOSOKAWA HIROFUMI ,  TSUNEKAWA TETSUYA

IPC: B29C55/12 ,  B29C55/14 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  G11B5/73 ,  G11B5/84

Abstract: The object of this invention is to provide a biaxially oriented polyester film suitable as a base film for high density magnetic recording media, small in track deviation and excellent in traveling durability and preservability, and to provide a production method thereof. The object of this invention can be achieved by a biaxially oriented polyester film, characterized in that the dimensional change rate (A) in the transverse direction of the film is in a range of -0.3 to 0% when the film is allowed to stand at 49 DEG C and 90% RH for 72 hours, while being loaded with 32 MPa in the machine direction.

公开(公告)号：DE60029920T2

公开(公告)日：2007-02-22

申请号：DE60029920

申请日：2000-04-18

Applicant: TORAY INDUSTRIES

Inventor： SUGII HIKARU ,  KOTOURA MASAAKI ,  HOSOKAWA HIROFUMI ,  TSUNEKAWA TETSUYA

IPC: B29C55/12 ,  B29C55/14 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  G11B5/73 ,  G11B5/84

Abstract: The object of this invention is to provide a biaxially oriented polyester film suitable as a base film for high density magnetic recording media, small in track deviation and excellent in traveling durability and preservability, and to provide a production method thereof. The object of this invention can be achieved by a biaxially oriented polyester film, characterized in that the dimensional change rate (A) in the transverse direction of the film is in a range of -0.3 to 0% when the film is allowed to stand at 49 DEG C and 90% RH for 72 hours, while being loaded with 32 MPa in the machine direction.

公开(公告)号：EP1122051A4

公开(公告)日：2005-04-27

申请号：EP00919131

申请日：2000-04-18

Applicant: TORAY INDUSTRIES

Inventor： SUGII HIKARU ,  KOTOURA MASAAKI ,  HOSOKAWA HIROFUMI ,  TSUNEKAWA TETSUYA

IPC: B29C55/14 ,  C08J5/18 ,  G11B5/73 ,  G11B5/84 ,  B29C55/12 ,  B29K67/00 ,  B29L7/00

CPC classification number: G11B5/73 ,  Y10S428/91 ,  Y10T428/2495 ,  Y10T428/31721 ,  Y10T428/31786

Abstract: A biaxially oriented polyester film suitable for use as a base film for media for high-density magnetic recording, which is reduced in track shifting and excellent in running durability and storage stability. The biaxially oriented polyester film has a width-direction dimensional change (A) of -0.3 to 0 % through 72-hour standing at 49 DEG C and 90 % RH under a machine-direction load of 32 MPa.

Abstract translation: 本发明的目的是提供适合作为用于高密度磁记录介质，在磁道偏移小，具有优异的传输耐久性和维护的基膜的双轴取向聚酯膜，及其提供的制造方法。 本发明的目的可以通过双轴取向聚酯薄膜来实现，在DASS其特征在于所述膜的横向方向上死尺寸变化率（A）是在一个范围的-0.3〜0％当膜静置在 49℃和90％RH 72小时，而在机器方向上被加载有32兆帕。