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    • 3. 发明授权
    • Biaxially drawn polyhexamethylene adipamide film and process for
producing same
    • 双轴拉伸聚己二酰己二胺聚酰亚胺薄膜及其制备方法
    • US4352926A
    • 1982-10-05
    • US149580
    • 1980-05-14
    • Yukinori MatsuokaYoshihiko MutoMitsuo Kohno
    • Yukinori MatsuokaYoshihiko MutoMitsuo Kohno
    • B29C47/88B29B7/00B29C47/00B29C47/92B29C49/00B29C55/00B29C55/28B29K77/00B29L7/00C08G69/26
    • B29C47/0009B29C47/0026B29C47/0057B29C47/0059
    • Disclosed is a biaxially drawn polyhexamethylene adipamide film having a relative viscosity of at least 3.2 as measured at 25.degree. C. in aqueous 96% H.sub.2 SO.sub.4, a degree of crystallinity of from 35% to 45%, a birefringence (.DELTA.n) of not more than 0.006, as determined at any point in its entire area, and an initial modulus of elasticity in tension of at least 230 kg/mm.sup.2 as determined in ay direction across substantially its entire area. The film may be produced by a process wherein molten polyhexamethylene adipamide is extruded through a circular die gap and the tubular extrudate is brought in sliding contact with the outer periphery of an inside mandrel, thereby to be cooled, which process is characterized in that polyhexamethylene adipamide having a relative viscosity of from 3.3 to 5.0, as measured at 25.degree. C. in aqueous 96% H.sub.2 SO.sub.4, is used; the tubular extrudate formed therefrom is cooled at a cooling rate (X.degree. C./sec.) satisfying the following formula with respect to the relative viscosity of the polymer used,-100.times..eta.rel+1,200
    • 公开了一种双轴拉伸的聚己二酰己二胺聚酰胺薄膜,其在25℃,96%H 2 SO 4水溶液中的相对粘度至少为3.2,结晶度为35%至45%,双折射(DELTA n)不超过 大于0.006,如在其整个区域中的任何点所确定的,并且在基本上其整个区域上沿ay方向确定的至少230kg / mm 2的初始拉伸弹性弹性模量。 该膜可以通过其中熔融聚己二酰己二胺通过圆形模头间隙挤出并且管状挤出物与内芯轴的外周滑动接触从而被冷却的方法制备,该方法的特征在于聚己二酰己二胺 使用在25℃在96%H 2 SO 4水溶液中测得的相对粘度为3.3至5.0的相对粘度; 由此形成的管状挤出物以相对于所使用的聚合物的相对粘度满足下列公式的冷却速度(X℃/秒)冷却,-100x eta rel + 1,200
    • 6. 发明授权
    • Biaxially drawn polyhexamethylene adipamide film
    • 双轴拉伸聚己二酰己二胺膜
    • US4252966A
    • 1981-02-24
    • US956267
    • 1978-10-31
    • Yukinori MatsuokaYoshihiko MutoMitsuo Kohno
    • Yukinori MatsuokaYoshihiko MutoMitsuo Kohno
    • B29C47/88B29B7/00B29C47/00B29C47/92B29C49/00B29C55/00B29C55/28B29K77/00B29L7/00C08G69/46
    • B29C47/0009B29C47/0026B29C47/0057B29C47/0059
    • Disclosed is a biaxially drawn polyhexamethylene adipamide film having a relative viscosity of at least 3.2 as measured at 25.degree. C. in aqueous 96% H.sub.2 SO.sub.4, a degree of crystallinity of from 35% to 45%, a birefringence (.DELTA.n) of not more than 0.006, as determined at any point in its entire area, and an initial modulus of elasticity in tension of at least 230 kg/mm.sup.2 as determined in any direction across substantially its entire area. The film may be produced by a process wherein molten polyhexamethylene adipamide is extruded through a circular die gap and the tubular extrudate is brought in sliding contact with the outer periphery of an inside mandrel, thereby to be cooled, which process is characterized in that polyhexamethylene adipamide having a relative viscosity of from 3.3 to 5.0, as measured at 25.degree. C. in aqueous 96% H.sub.2 SO.sub.4, is used; the tubular extrudate formed therefrom is cooled at a cooling rate (X.degree. C./sec.) satisfying the following formula with respect to the relative viscosity of the polymer used,-100.times..eta.rel+1,200
    • 公开了一种双轴拉伸的聚己二酰己二胺聚酰胺薄膜,其在25℃,96%H 2 SO 4水溶液中的相对粘度至少为3.2,结晶度为35%至45%,双折射(DELTA n)不超过 大于0.006,如在其整个区域中的任何点所确定的,并且在基本上其整个区域上的任何方向上确定的至少230kg / mm 2的初始弹性弹性模量为至少230kg / mm 2。 该膜可以通过其中熔融聚己二酰己二胺通过圆形模头间隙挤出并且管状挤出物与内芯轴的外周滑动接触从而被冷却的方法制备,该方法的特征在于聚己二酰己二胺 使用在25℃在96%H 2 SO 4水溶液中测得的相对粘度为3.3至5.0的相对粘度; 由此形成的管状挤出物以相对于所使用的聚合物的相对粘度满足下列公式的冷却速度(X℃/秒)冷却,-100x eta rel + 1,200