公开(公告)号：WO2004081090A8

公开(公告)日：2005-10-27

申请号：PCT/JP2004001529

申请日：2004-02-13

Applicant: MITSUBISHI POLYESTER FILM CORP ,  MITSUBISHI CHEM CORP ,  MASUDA NARIHIRO

Inventor： MASUDA NARIHIRO

IPC: B29C33/68 ,  B32B27/36 ,  C08G63/199 ,  C08J5/18 ,  G02B1/10 ,  G02F1/1335 ,  B29C55/12 ,  C08J7/04 ,  G02B1/04

CPC classification number: B32B27/36 ,  B29C33/68 ,  B29K2067/00 ,  B29K2067/046 ,  B32B7/06 ,  B32B27/08 ,  B32B2307/518 ,  B32B2307/736 ,  B32B2367/00 ,  C08G63/199 ,  C08J5/18 ,  C08J2367/02 ,  G02B1/10 ,  G02F1/133528 ,  Y10T428/24355 ,  Y10T428/31786

Abstract: A biaxially oriented polyester film made of a polyester comprising 1,4-cyclohexanedicarboxylic acid units and 1,4-cyclohexanedimethanol units as major repeating units and having a melting point of 200°C or higher, wherein the machine-direction and transverse-direction thermal shrinkages at 130°C are both 5% or lower and the total light transmittance is 90% or higher. The biaxially oriented polyester film has excellent heat resistance although the polyester is aliphatic. It further has the satisfactory transparency inherent in aliphatic polyesters and is suitable for use in optical applications.

Abstract translation: 由作为主要重复单元的1,4-环己烷二甲酸单元和1,4-环己烷二甲醇单元的聚酯制成的双轴取向聚酯膜，其熔点为200℃以上，其中机器方向和横向热 130℃的收缩率均为5％以下，总透光率为90％以上。 双轴取向聚酯膜具有优异的耐热性，尽管聚酯是脂肪族的。 它还具有脂肪族聚酯中固有的令人满意的透明性，并且适用于光学应用。

公开(公告)号：WO1988005797A1

公开(公告)日：1988-08-11

申请号：PCT/JP1988000110

申请日：1988-02-05

Applicant: DIAFOIL COMPANY, LIMITED ,  OTONARI, Satoshi ,  SATO, Yoshinori ,  MASUDA, Narihiro ,  KOTANI, Tomoyuki

Inventor： DIAFOIL COMPANY, LIMITED

IPC: C08J09/00

CPC classification number: C08J5/18 ,  C08J2367/02 ,  C08L67/02 ,  C08L23/12 ,  C08L23/00

Abstract: A polyester film containing fine cells is obtained by extrusion-molding into sheet a composition comprising aromatic polyester, 3 to 20 wt %, based on the polyester, of crystalline polypropylene having a melt-flow index of 0.2 to 120, and 0.001 to 3 wt %, based on the sum of the amount of the polyester and that of the polypropylene, of a surfactant, and stretching the sheet in at least one direction. Since this polyester film contains innumerable fine closed cells, it has a small apparent specific gravity and shows a large hiding power when titanium oxide is added thereto in only a small amount or even not added, thus being preferably utilized as base materials for various products in plate-making or information industry.