Abstract: Provided are a liquid agent container formed of a multilayer film using polybutylene terephthalate in an outer layer, in which it is controlled or prevented that a component derived from the polybutylene terephthalate is permeates the multilayer film and is eluted into a content liquid, and a multilayer film for forming such a liquid agent container. A multilayer film includes at least a layer (1) including polybutylene terephthalate, a layer (2) including a cyclic olefin-based polymer, a flexible layer (3) including an ethylene-based resin, and a layer (4) including a polyolefin, which are laminated, wherein the layer (1), the layer (2), and the layer (4) forming one surface of the multilayer film are laminated in this order, and a liquid agent container is formed of the multilayer film so that the layer (4) is formed as the innermost layer.

Abstract: An object is to provide a method for producing a port that can shorten the time for production.

Abstract: An object is to provide a port that is capable of securely preventing pulling-out of a sealing plug from a port body. Provided is a port including: a sealing plug through which a hollow needle can be pierced; a port body having a hollow structure with the sealing plug disposed therein; and a pulling-out preventing member to be attached to the port body. The port body includes: a part to be sealed that has a tubular shape with a first end and a second end opposite to the first end, and is configured so that the sealing plug is sealingly inserted into the part to be sealed; a connection part that has a tubular shape, is continuous with the first end of the part to be sealed, and has an outer periphery connected to the bag body to be filled with a medical liquid; and a part to be fitted that is formed in any one of an inner peripheral surface of the part to be sealed, an outer peripheral surface of the part to be sealed, and the second end of the part to be sealed.

Abstract: An object is to provide a method for producing a port that can shorten the time for production.

Abstract: An object is to provide a port that is capable of securely preventing pulling-out of a sealing plug from a port body. Provided is a port including: a sealing plug through which a hollow needle can be pierced; a port body having a hollow structure with the sealing plug disposed therein; and a pulling-out preventing member to be attached to the port body. The port body includes: a part to be sealed that has a tubular shape with a first end and a second end opposite to the first end, and is configured so that the sealing plug is sealingly inserted into the part to be sealed; a connection part that has a tubular shape, is continuous with the first end of the part to be sealed, and has an outer periphery connected to the bag body to be filled with a medical liquid; and a part to be fitted that is formed in any one of an inner peripheral surface of the part to be sealed, an outer peripheral surface of the part to be sealed, and the second end of the part to be sealed.