| 摘要 |
<p>A biaxially oriented film of only polyarylene sulfide resin excelling in rupture elongation and planarity. The biaxially oriented polyarylene sulfide film in one form has a rupture elongation of 110% or more in the direction of length or width, a rupture stress of 200 MPa or less in the direction of length or width and a thermal shrinkage ratio of 0 to 10% at 260°C/10 min in the directions of length and width. The biaxially oriented polyarylene sulfide film in another form has an average rupture elongation of 110% or more in the directions of length and width, an average rupture stress of 200 MPa or less in the directions of length and width and a thermal shrinkage ratio of 0 to 10% at 260°C/10 min in the directions of length and width. Further, there is provided a process for producing a biaxially oriented polyarylene sulfide film, comprising the step of carrying out drawing in the directions of length and width at an area magnification of 13 times or below and two or more stages of thermally fixing after drawing at different temperatures in such a manner that the first-stage thermal fixing temperature is in the range of 160°to 220°C and the second or later-stage thermal fixing highest temperature is in the range of 240°to 280°C.</p> |
