Abstract: A gas-adsorbing device (1) includes: a container (2); a gas adsorbent (3) configured to be disposed inside the container (2) so as to adsorb a gas; and an aeration member (4) having a predetermined aeration rate. The gas adsorbent (3) is disposed in a space formed by the container (2) and the aeration member (4). Further, the space is configured to be completely enclosed by the container (2) and the aeration member (4). In this configuration, it is possible to attain a gas-adsorbing device in which it is possible to reduce consumption of the gas adsorbent due to contact with air, even when the gas-adsorbing device is handled in air.

Abstract: A gas-adsorbing device (1) includes: a container (2); a gas adsorbent (3) configured to be disposed inside the container (2) so as to adsorb a gas; and an aeration member (4) having a predetermined aeration rate. The gas adsorbent (3) is disposed in a space formed by the container (2) and the aeration member (4). Further, the space is configured to be completely enclosed by the container (2) and the aeration member (4). In this configuration, it is possible to attain a gas-adsorbing device in which it is possible to reduce consumption of the gas adsorbent due to contact with air, even when the gas-adsorbing device is handled in air.

Abstract: The present invention relates to a retardation film using polyester having a photoelastic coefficient of ?40×10?12 Pa?1 to 40×10?12 Pa?1. The present invention also relates to a polyester resin for optical use which contains a phosphorus compound, and an alicyclic component and a fluorene derivative component as constituents, and satisfies the following equations (6) and (7): 100° C.?glass transition temperature?150° C.??(6) and 1.0?(Ma/2+Mb+Mc)/P?5.0??(7), wherein Ma is the number of moles of an alkali metal element contained in 1 ton of the polyester resin, Mb is the number of moles of an alkaline earth metal element contained in 1 ton of the polyester resin, Mc is the sum of the number of moles of a zinc element (Zn), a cobalt element (Co) and a manganese element (Mn) contained in 1 ton of the polyester resin, and P is the number of moles of a phosphorus element contained in 1 ton of the polyester resin.

Abstract: The present invention relates to a retardation film using polyester having a photoelastic coefficient of ?40×10?12 Pa?1 to 40×10?12 Pa?1. The present invention also relates to a polyester resin for optical use which contains a phosphorus compound, and an alicyclic component and a fluorene derivative component as constituents, and satisfies the following equations (6) and (7): 100° C.?glass transition temperature?150° C.??(6) and 1.0?(Ma/2+Mb+Mc)/P?5.0??(7), wherein Ma is the number of moles of an alkali metal element contained in 1 ton of the polyester resin, Mb is the number of moles of an alkaline earth metal element contained in 1 ton of the polyester resin, Mc is the sum of the number of moles of a zinc element (Zn), a cobalt element (Co) and a manganese element (Mn) contained in 1 ton of the polyester resin, and P is the number of moles of a phosphorus element contained in 1 ton of the polyester resin.