Stretchable porous film and article

• Main Authors: NAKAGAWA MUNESHIGE, TAKEDA YASUHIRO, UCHIDA SHOU, IKISHIMA SHINSUKE, TAKEDA KOHEI, SHIGEMATSU YOSHITAKE
• Format: Patent
• Language: Chinese; English
• Published: 20.10.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Provided is an elastic porous film having excellent elasticity and excellent air permeability. Also provided is an article comprising the stretchable porous film. This elastic porous film has voids in the surface thereof, and is characterized in that: the air permeability of the elastic porous film measured using a Wangshan air permeability meter is less than 99, 999 sec/100 cc; the stretchable porous film has an elongation direction in which the air permeability measured using a Wangshan air permeability meter in a 100% elongation state is less than 60,000 sec/100 cc; and the stretchable porous film has a pulling direction in which the residual strain is 10 mm or less when the stretchable porous film is pulled from a width of 20 mm and a chuck pitch of 30 mm at a pulling speed of 50 mm/min to a chuck pitch of 60 mm and held for 1 minute in a hysteresis test, and then the pulling of the chuck pitch is released. 提供一种具有优异伸缩性和优异透气性的伸缩性多孔膜。还提供一种包括该伸缩性多孔膜的制品。本发明的伸缩性多孔膜是在其表面具有空隙的伸缩性多孔膜，其中：其使用王研式透气度计测定的透气度小于99,999se