Porous membrane, porous membrane laminate, and method for producing porous membrane

• Main Authors: TSUJIWAKI HIROYUKI, FUKUNAGA ATSUSHI, KATAYAMA HIROKAZU, CHINO, KANAKO, HASHIMOTO TAKAMASA
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The porous membrane according to the present invention is a porous membrane having polytetrafluoroethylene as the main component, the porous membrane having an endothermic peak in the range of 300-360 DEG C (inclusive) in a melting curve obtained by differential scanning calorimetry at a temperature increase rate of 10 DEG C/min in a first operation, and the difference between the starting temperature and the ending temperature of the endothermic peak being 20 DEG C or less. 本发明的多孔膜是以聚四氟乙烯为主成分的多孔膜，通过升温速度10℃/分钟的差示扫描量热分析得到的第一次运行的熔化曲线在300℃以上且360℃以下的范围具有吸热峰，上述吸热峰的起始温度与终止温度的差为20℃以下。