Cartridge for Viscous Fluid Materials

Abstract

A cartridge for storing and dispensing viscous fluid materials providing excellent productivity and gas barrier properties and free from external appearance defects at the site of film wrapping. The inventive cartridge for viscous fluid materials has a plunger 3 inserted into the bottom portion of a cartridge body 2 fabricated using insert injection molding by integrally molding a cylindrical barrel portion 5 of a multilayer structure produced by laminating a gas barrier layer 8 including a metal thin layer 8 a on the exterior periphery or interior periphery of a plastic layer 7, and a lid 6 covering the top of said cylindrical barrel portion.

1 . A cartridge for viscous fluid materials, wherein a plunger used for dispensing contents filling a cartridge body is inserted in the bottom side of the cartridge body fabricated using insert injection molding by integrally molding a cylindrical barrel portion of a multilayer structure in which a gas barrier layer comprising a metal thin layer is laminated on the exterior periphery or interior periphery of a plastic layer used to maintain the shape and strength of the cylindrical barrel portion itself, and a lid covering the top of said cylindrical barrel portion. 
   
   
       2 . The cartridge for viscous fluid materials according to  claim 1 , wherein the gas barrier layer comprising the metal thin layer is laminated on the exterior periphery of the plastic layer of the cylindrical barrel portion. 
   
   
       3 . The cartridge for viscous fluid materials according to  claim 1 , wherein the gas barrier layer comprising the metal thin layer and a layer producing no interaction with the contents or allowing no components from the contents to pass therethrough is laminated on the interior periphery of the plastic layer of the cylindrical barrel portion. 
   
   
       4 . The cartridge for viscous fluid materials according to  claim 3 , wherein the cylindrical barrel portion and the lid portion are formed using injection molding by injecting PE, the layer producing no interaction with the contents or allowing no components from the contents to pass therethrough is formed from any one of polyesters, polyamides, polyacrylic resins, heat-curable epoxy resins, UV-curable epoxy resins, or mixed resins of two or more components selected therefrom, and the contents include at least one component selected from organic solvents, hydrocarbon oils, and ketones. 
   
   
       5 . The cartridge for viscous fluid materials according to  claim 1 , which is filled with a moisture-curable composition.