| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a sealed package body that is sufficiently resistant to heating-induced damage during a production process and has excellent airtightness.SOLUTION: A method for producing a sealed package body 1 comprises an overlapped portion-forming step, a first fusion step, a filling step, a squeezing step, a second fusion step and a tying step. In the second fusion step, a second sealed portion is formed to have at least two continuous sealed lines across the entire length of a tubular film 2 in the width direction. |
