MULTILAYER PROTECTIVE FILM FOR WATER ABSORPTION

• Main Authors: NANGOU SHUNYA, TAKAYAMA KEISUKE, YAGISAWA MISATO, OKUYAMA SHINPEI
• Format: Patent
• Language: Chinese; English
• Published: 28.06.2019
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

This multilayer protective film 1 for water absorption is characterized by comprising: a moisture-absorbing resin layer 3 in which a desiccant is dispersed; and a surface protective resin layer 5 which is provided on one surface of the moisture-absorbing resin layer 3. This multilayer protective film 1 for water absorption is also characterized in that: the surface protective resin layer 5 has a water vapor permeability of 40 g/m day or less at 40 DEG C at 90% RH; and the other surface of the moisture-absorbing resin layer 3 serves as a moisture-absorbing functional surface 7. 本发明的水分吸收用层叠保护膜1的特征在于包括：其中分散有干燥剂的吸湿性树脂层3；和设置在所述吸湿性树脂层3的一个表面上的表面保护树脂层5。该水分吸收用层叠保护膜1的特征还在于：表面保护树脂层5的40℃、90％RH下的透湿度为40g/m·天以下；并且吸湿性树脂层3的另一表面用作吸湿性功能面7。