Method for Manufacturing Medical Vial

Abstract

[Object] To provide a means manufacturing a medical vial which contains a Type IA borosilicate glass as the raw material and in which the elution amount of silica into a high ionic strength solution decreases to be equal to or less than the silica elution amount in a Type IB borosilicate glass. [Solution] A method for manufacturing a medical vial is a method for manufacturing a medical vial including a fire blast process of applying a flame ejected from a point burner to a deteriorated layer generated on the inner surface of a vial, in which the vial is molded from a glass tube containing a Type IA borosilicate glass as the raw material and the molar ratio of oxides contained in the borosilicate glass satisfies ψ=0.23±0.02 in ψ=[(Na 2 O+K 2 O)—Al 2 O 3 ]/B 2 O 3 and satisfies β=7.5±0.5 in β=B 2 O 3 /Al 2 O 3 .

1 . A method for manufacturing a medical vial comprising:
 a fire blast step of applying a flame ejected from a point burner to a deteriorated layer generated on an inner surface of a medical vial, wherein   the vial is molded from a glass tube containing a Type IA borosilicate glass as a raw material; and   a molar ratio of oxides contained in the borosilicate glass satisfies   ψ=0.23±0.02 in ψ=[(Na 2 O+K 2 O)—Al 2 O 3 ]/B 2 O 3  and satisfies   β=7.5±0.5 in β=B 2 O 3 /Al 2 O 3 .   
     
     
         2 . The method for manufacturing a medical vial according to  claim 1 , wherein
 a value obtained by quantifying silica eluted into a high ionic strength solution having a KCl concentration of 0.9 wt/wt % and a pH of 8 from an area per cm 2  in a total surface area of the vial by heating the vial after the fire blast step at 121° C. for 2 hours in a state where the vial is immersed in the high ionic strength solution using an ICP-AES method is 20.0 μg/cm 2  or less.   
     
     
         3 . The method for manufacturing a medical vial according to  claim 2 , wherein
 the high ionic strength solution is a solution containing 0.1 mol/L or more of alkali salt.