Resin composition for manufacturing medical storage container, sheet and medical storage container
The purpose of the present invention is to provide a resin composition for manufacturing a medical storage container that has improved oxygen permeability and that tends not to have excessively lower transparency. To this end, the present invention pertains to a resin composition for manufacturing a medical storage container, the composition including polyethylene (a) and polymethylpentene (b). The resin composition contains, as polyethylene (a), a first polyethylene (a-1), which is a main component of the polyethylene (a), and a second polyethylene (a-2) having a lower density than the first polyethylene.
1. A resin composition for manufacturing a medical storage container, the resin composition comprising:
polyethylene (a); and
polymethylpentene (b),
wherein the polyethylene (a) comprises:
a first polyethylene (a-1), that is a main component of the polyethylene (a), wherein a density of the first polyethylene (a-1) is 0.860 g/cm 3 or more and 0.890 g/cm 3 or less, and
a second polyethylene (a-2) having a higher density than the first polyethylene (a-1),
wherein an oxygen permeability per unit thickness of the resin composition is 1000 [mL·mm/(m 2 ·24 h·atm)] or more, and
wherein a haze value per unit thickness of the resin composition is 50% or less.
2. The resin composition according to claim 1 , wherein a content of the second polyethylene (a-2) is lower than a content of the polymethylpentene (b).
3. The resin composition according to claim 1 , further comprising:
a hydrogenated block copolymer (c) formed by hydrogenation of a block copolymer, wherein the hydrogenated block copolymer comprises:
at least two polymer blocks A mainly composed of a monomer unit derived from a vinyl aromatic compound, and
at least one polymer block B mainly composed of a monomer unit derived from a conjugated diene compound,
wherein a content of the second polyethylene (a-2) is lower than a content of the hydrogenated block copolymer (c).
4. The resin composition according to claim 3 , wherein a content of the hydrogenated block copolymer (c) is lower than a content of the first polyethylene (a-1).
5. A resin composition for manufacturing a medical storage container, the resin composition comprising:
a first polyethylene (a-1), wherein a density of the first polyethylene (a-1) is 0.860 g/cm3 or more and 0.890 g/cm3 or less;
a second polyethylene (a-2) having a higher density than the first polyethylene and a lower content than the first polyethylene;
polymethylpentene (b); and
a hydrogenated block copolymer (c) formed by hydrogenation of a block copolymer, the hydrogenated block copolymer comprising:
at least two polymer blocks A mainly composed of a monomer unit derived from a vinyl aromatic compound, and
at least one polymer block B mainly composed of a monomer unit derived from a conjugated diene compound,
wherein an oxygen permeability per unit thickness of the resin composition is 1000 [mL·mm/(m2·24 h·atm)] or more, and
wherein a haze value per unit thickness of the resin composition is 50% or less.
6. A sheet formed by molding the resin composition according to claim 1 .
7. A medical storage container including a storage portion formed by molding the sheet according to claim 6 into a bag shape.
8. A medical storage container including a storage portion formed by molding the resin composition according to claim 1 into a bag shape.