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RU2008108103A - Микропористая полиэтиленовая мембрана, способ ее получения и разделитель батареи - Google Patents

Микропористая полиэтиленовая мембрана, способ ее получения и разделитель батареи Download PDF

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RU2008108103A
RU2008108103A RU2008108103/04A RU2008108103A RU2008108103A RU 2008108103 A RU2008108103 A RU 2008108103A RU 2008108103/04 A RU2008108103/04 A RU 2008108103/04A RU 2008108103 A RU2008108103 A RU 2008108103A RU 2008108103 A RU2008108103 A RU 2008108103A
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polyethylene
microporous membrane
molecular weight
gel
producing
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RU2008108103/04A
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Котаро ТАКИТА (JP)
Котаро ТАКИТА
Синтаро КИКУТИ (JP)
Синтаро КИКУТИ
Казухиро ЯМАДА (JP)
Казухиро ЯМАДА
Тейдзи НАКАМУРА (JP)
Тейдзи НАКАМУРА
Коити КОНО (JP)
Коити КОНО
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Тонен Кемикал Корпорейшн (Jp)
Тонен Кемикал Корпорейшн
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Publication of RU2008108103A publication Critical patent/RU2008108103A/ru

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Abstract

1. Полиэтиленовая микропористая мембрана, выполненная из полиэтиленовой смолы, содержащей 15 мас.% или менее полиэтилена сверхвысокой молекулярной массы со среднемассовой молекулярной массой 1·106 или более, которая состоит из слоя плотной структуры со средним диаметром пор 0,01-0,05 мкм и слоя грубозернистой структуры, сформированного, по меньшей мере, на одной поверхности, со средним диаметром пор слоя грубозернистой структуры в 1,2-5,0 раз больше, чем в слое плотной структуры. ! 2. Полиэтиленовая микропористая мембрана по п.1, в которой полиэтиленовая смола состоит из полиэтилена сверхвысокой молекулярной массы и полиэтилена высокой плотности. ! 3. Полиэтиленовая микропористая мембрана по п.1, в которой отношение толщины слоя грубозернистой структуры к слою плотной структуры составляет 5/1-1/10. ! 4. Способ получения полиэтиленовой микропористой мембраны, включающий стадию экструзии расплава смеси полиэтиленовой смолы, содержащей 15 мас.% или менее полиэтилена сверхвысокой молекулярной массы со среднемассовой молекулярной массой 1·106 или более и мембранообразующего растворителя через головку экструдера, охлаждение получаемого экструдата с градиентом температуры по толщине для получения гелеобразного листа, растяжение гелеобразного листа при температуре от температуры дисперсии кристаллов полиэтиленовой смолы +10°С до температуры дисперсии кристаллов +30°С, по меньшей мере, в одном направлении, удаление мембранообразующего растворителя и повторное растяжение получаемой мембраны в 1,05-1,45 раза, по меньшей мере, в одном направлении. ! 5. Способ получения полиэтиленовой микропористой мембраны по п.4, в котором гелеобразны

Claims (9)

1. Полиэтиленовая микропористая мембрана, выполненная из полиэтиленовой смолы, содержащей 15 мас.% или менее полиэтилена сверхвысокой молекулярной массы со среднемассовой молекулярной массой 1·106 или более, которая состоит из слоя плотной структуры со средним диаметром пор 0,01-0,05 мкм и слоя грубозернистой структуры, сформированного, по меньшей мере, на одной поверхности, со средним диаметром пор слоя грубозернистой структуры в 1,2-5,0 раз больше, чем в слое плотной структуры.
2. Полиэтиленовая микропористая мембрана по п.1, в которой полиэтиленовая смола состоит из полиэтилена сверхвысокой молекулярной массы и полиэтилена высокой плотности.
3. Полиэтиленовая микропористая мембрана по п.1, в которой отношение толщины слоя грубозернистой структуры к слою плотной структуры составляет 5/1-1/10.
4. Способ получения полиэтиленовой микропористой мембраны, включающий стадию экструзии расплава смеси полиэтиленовой смолы, содержащей 15 мас.% или менее полиэтилена сверхвысокой молекулярной массы со среднемассовой молекулярной массой 1·106 или более и мембранообразующего растворителя через головку экструдера, охлаждение получаемого экструдата с градиентом температуры по толщине для получения гелеобразного листа, растяжение гелеобразного листа при температуре от температуры дисперсии кристаллов полиэтиленовой смолы +10°С до температуры дисперсии кристаллов +30°С, по меньшей мере, в одном направлении, удаление мембранообразующего растворителя и повторное растяжение получаемой мембраны в 1,05-1,45 раза, по меньшей мере, в одном направлении.
5. Способ получения полиэтиленовой микропористой мембраны по п.4, в котором гелеобразный лист формируют быстрым охлаждением одной поверхности экструдата, при медленном охлаждении другой поверхности экструдата.
6. Способ получения полиэтиленовой микропористой мембраны по п.5, в котором гелеобразный лист формируют быстрым охлаждением одной поверхности экструдата охлаждающим роликом, находящимся при температуре от температуры кристаллизации полиэтиленовой смолы - 115°С до температуры кристаллизации - 25°С при времени контакта 1-30 с, при медленном охлаждении другой поверхности экструдата воздействием воздуха при комнатной температуре.
7. Способ получения полиэтиленовой микропористой мембраны по п.4, в котором после растяжения гелеобразный лист термоусаживают, мембранообразующий растворитель удаляют.
8. Способ получения полиэтиленовой микропористой мембраны по п.4, в котором растянутый гелеобразный лист и/или микропористую мембрану, из которой удален мембранообразующий растворитель, приводят в контакт с горячим растворителем.
9. Разделитель батареи, сформированный из полиэтиленовой микропористой мембраны по п.1.
RU2008108103/04A 2005-08-04 2006-08-03 Микропористая полиэтиленовая мембрана, способ ее получения и разделитель батареи RU2008108103A (ru)

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