| 摘要 |
PURPOSE: To obtain a cartridge to feed an aqueous-paste dental material, by keeping the aqueous-paste dental material in a cartridge body containing polymers which consist of polyolefin polymers and which have specific values of moisture permeability and oxygen permeability, and arranging a chamber to feed the material gradually. CONSTITUTION: When an arm 32 is moved toward a handle 30, plungers 36 and 38 proceed forward, and a head 46 pushes a piston 92 in a chamber 60 toward a neck 64 in the advancing direction. When the piston 92 advances, the contents of the dental material in the chamber 60 are emitted from the cartridge 24 and led into an outlet conduit 78. Said cartridge 24 is made of an injection-forming material containing polymers selected from a group of polyolefin polymers, and has the moisture permeability less than 61.6×10<-8> g.cm/m<2> .day.Pa and the oxygen permeability more than 443.3×10<-8> cm<3> .cm/ m<2> .day.Pa. |
