Abstract: A surface treatment method and a surface treatment device 2 for a resin vessel 1 forms a coating or performs surface modification on the surface of the resin vessel 1. In a sterilized environment as well as an environment with a pressure equal to or higher than the atmospheric pressure, a material for the coating or the surface modification is attached to at least one of an inner surface and an outer surface of the resin vessel 1, and the resin vessel 1, to which the material is attached, is irradiated with an electron beam to perform the coating or the surface modification. It is possible to form the coating or perform the surface modification on the resin vessel at a high speed.

Abstract: The present invention relates to a surface treatment method and a surface treatment device 2 for a resin vessel 1, which form a coating or perform surface modification on the surface of the resin vessel 1. In a sterilized environment as well as an environment with pressure equal to or higher than the atmospheric pressure, a material for the coating or the surface modification is attached to at least one of an inner surface and an outer surface of the resin vessel 1, and the resin vessel 1, to which the material is attached, is irradiated with an electron beam to perform the coating or the surface modification. It is possible to form the coating or perform the surface modification on the resin vessel at high speed.

Abstract: The present invention relates to a method for cutting a cell sheet S, which includes cutting the cell sheet S that is cultured in the inside of a container 4 which has accommodated a culture medium M therein, by a cutting device 3 that emits a laser L. The cutting method includes: removing the culture medium M from the container 4 and also sealing the container 4 by a lid portion 13 provided with a transmission part made from a material which allows the laser L to pass through, in the inside of an aseptic room 2 that has been kept in an aseptic condition; taking out the container 4 sealed by the lid portion 13, from the aseptic room 2, and moving the container to the cutting device 3 that is provided in the outside of the aseptic room 2; and in the cutting device 3, passing the laser L through the transmission part of the lid portion 13, and cutting the cell sheet S by the laser L. The method enables the cell sheet S to be cut in such a state that the aseptic condition is kept.