| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed package sealed by heat sealing the package made of a crystalline polyester resin by laser welding.SOLUTION: In the sealed package formed by integrally sealing mating package materials by laser welding L, at least laser-welded surfaces of the mating package materials are made of the crystalline polyester resin and laser-welded L via a seal material S containing an amorphous polyester resin and a laser light absorbing agent. |
