LAMINATE FILM, PACKAGING BAG, AND PACKAGING BODY
A laminate film including a base material layer and a sealant layer including a polyolefin resin, the base material layer including a first resin layer that includes a polyolefin resin and a second resin layer that includes a laser beam-absorbing resin, in which the laser beam-absorbing resin absorbs a laser beam used to form a half-cut line, the polyolefin resins included in the sealant layer and the first resin layer do not absorb the laser beam, and a total content percentage occupied by the polyolefin resins in the entirety of the laminate film is 90% by mass or greater.
1 . A laminate film comprising:
a base material layer; and
a sealant layer including a polyolefin resin,
the base material layer including a first resin layer including a polyolefin resin and a second resin layer including a laser beam-absorbing resin,
wherein the laser beam-absorbing resin absorbs a laser beam used to form a half-cut line, the polyolefin resins included in the sealant layer and the first resin layer do not absorb the laser beam, and a total content percentage occupied by the polyolefin resins in an entirety of the laminate film is 90% by mass or greater.
2 . The laminate film according to claim 1 , wherein the laser beam-absorbing resin is composed of at least one selected from the group consisting of polyethylene terephthalate, a polyamide, and ethylene vinyl alcohol.
3 . The laminate film according to claim 1 , wherein the base material layer is obtained by co-extrusion.
4 . The laminate film according to claim 3 , wherein in the base material layer, the laser beam-absorbing resin is a polyamide, and the polyolefin resin included in the first resin layer is a linear low-density polyethylene.
5 . The laminate film according to claim 1 ,
wherein the base material layer includes the second resin layer and two of the first resin layers arranged to have the second resin layer sandwiched therebetween, and
the laser beam-absorbing resin is a polyamide.
6 . The laminate film according to claim 1 ,
wherein the base material layer includes the second resin layer and two of the first resin layers arranged to have the second resin layer sandwiched therebetween, and
the laser beam-absorbing resin is polyethylene terephthalate.
7 . The laminate film according to claim 1 ,
further comprising a barrier layer between the base material layer and the sealant layer,
wherein the laminate film has the first resin layer between the barrier layer and the second resin layer.
8 . A packaging bag formed by using the laminate film according to claim 1 ,
wherein the sealant layer is directed inward, and the base material layer is directed outward.
9 . A packaged body comprising:
the packaging bag according to claim 8 ; and
contents accommodated in the packaging bag.