Laminated film and bag
An object is to provide a laminated film which contains a recycled resin, has a relatively excellent appearance, and has a relatively small damage property, and a bag containing the laminated film. The laminated film contains three or more resin layers including at least one inner layer and two surface layers. The at least one inner layer contains a recycled resin composition containing a recycled resin and an antioxidant, and the content of the antioxidant is 100 ppm by mass to 2000 ppm by mass with respect to the recycled resin composition. The two surface layers contain an unused resin.
1 . A laminated film comprising three or more resin layers including at least one inner layer and two surface layers, wherein
the at least one inner layer contains a recycled resin composition containing a recycled resin and an antioxidant, and a content of the antioxidant is 100 ppm by mass to 2000 ppm by mass with respect to the recycled resin composition,
wherein the recycled resin comprises a polymer containing a monomer unit derived from at least one selected from the group consisting of ethylene, propylene, and α-olefin having 4 to 12 carbon atoms;
wherein the antioxidant is a phosphorus-based antioxidant or a phenol-based antioxidant selected from 2,6-di-t-butyl-4-methylphenol (BHT), n-octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate, pentaerythrityl-tetrakis [3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl) benzene, and 3,9-bis[2-{3-(3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro [5⋅5] undecane and
the two surface layers contain an unused resin;
and wherein the laminated film exhibits improved scratch resistance according to JIS K7125-1987 relative to an analogous laminated film comprising an unused resin composition as an inner layer.
2 . The laminated film according to claim 1 , wherein a content of the antioxidant is 500 ppm by mass to 1000 ppm by mass with respect to the recycled resin composition.
3 . The laminated film according to claim 1 , wherein the recycled resin composition further contains an antistatic agent.
4 . The laminated film according to claim 3 , wherein a content of the antistatic agent is 100 ppm by mass to 8000 ppm by mass with respect to the recycled resin composition.
5 . The laminated film according to claim 4 , wherein the content of the antistatic agent is 100 ppm by mass to 2000 ppm by mass with respect to the recycled resin composition.
6 . The laminated film according to claim 1 , wherein the recycled resin composition further contains a neutralizing agent.
7 . The laminated film according to claim 6 , wherein a content of the neutralizing agent is 100 ppm by mass to 2000 ppm by mass with respect to the recycled resin composition.
8 . The laminated film according to claim 1 , wherein
a content of the resin containing the polymer is 99.5% by mass or more with respect to the recycled resin.
9 . The laminated film according to claim 1 , consisting of three resin layers.
10 . The laminated film according to claim 1 , having a thickness of 100 μm to 150 μm.
11 . The laminated film according to claim 1 , wherein a resin constituting the unused resin is a resin containing a polymer containing a monomer unit derived from at least one selected from the group consisting of ethylene, propylene, and an α-olefin having 4 to 12 carbon atoms.
12 . The laminated film according to claim 1 , wherein each of a resin constituting the recycled resin and a resin constituting the unused resin is a resin containing an ethylene homopolymer or an ethylene-based copolymer containing more than 50% by mass of a monomer unit derived from ethylene.
13 . The laminated film according to claim 12 , wherein the ethylene-based copolymer contains 90% by mass or more of a monomer unit derived from ethylene.
14 . A bag comprising the laminated film according to claim 1 .