LAMINATE AND GAS SEPARATION MEMBRANE, AND METHOD OF MANUFACTURING THE LAMINATE

• Main Authors: TAKEMOTO HIRONORI, FUJIGAYA TAKUMI, OTA YUDAI
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2015
• 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

PROBLEM TO BE SOLVED: To provide a laminate which is formed by laminating a porous membrane and an air-permeable support body and of which adhesive strength is enhanced without significantly degrading air permeability.SOLUTION: An air-permeable support body, a hydrophilic gel layer, and a porous layer are laminated in this order. Adhesion strength between the porous membrane and the air-permeable support body by the hydrophilic gel layer is 3 N/m or higher. Gurley permeability of the laminate is less than three times Gurley permeability of the porous membrane. An absolute dry weight of the hydrophilic gel layer is preferably in a range of 1 g/m-10 g/m. The hydrophilic gel layer is preferably at least one kind of hydrophilic polymer selected from a group of polyvinyl alcohol, polyacrylic acid, and polyvinyl alcohol-polyacrylic acid copolymer. 【課題】多孔膜と通気性支持体とが積層された積層体において、通気性を大幅に低下させることなく、接着強度を高くする。【解決手段】通気性支持体と、親水性ゲル層と、多孔膜とをこの順で積層する。そして、前記親水性ゲル層による前記多孔膜と前記通気性支持体との接着強度を３Ｎ／ｍ以上とし、前記積層体のガーレー透気秒数を、前記多孔膜のガーレー透気秒数の３倍以下とする。ここで、親水性ゲル層の絶乾重量は、１ｇ／ｍ２〜１０ｇ／ｍ２の範囲であるのが好ましい。また、親水性ゲル層は、ポリビニルアルコール、ポリアクリル酸及びポリビニルアルコール−ポリアクリル酸共重合体からなる群から選択される少なくとも１種の親水性ポリマーを含むのが好ましい。【選択図】図１