Transparent heat shielding and insulating member, and method for producing the same
A transparent heat shielding and insulating member of the present invention includes a transparent base and a functional layer formed on the transparent base. The functional layer includes an infrared reflecting layer, a primer layer and a protective layer laminated in this order from the transparent base side. The primer layer is formed of a modified polyolefin resin having an acid group or a hydroxyl group, and the protective layer is formed of an ionizing radiation curable resin or a thermosetting resin.
1. A transparent heat shielding and insulating member comprising a transparent base and a functional layer formed on the transparent base, wherein
the functional layer comprises an infrared reflecting layer, a primer layer and a protective layer formed of an ionizing radiation curable resin, resin, the layers in direct contact with each other in this order from the transparent base side,
the infrared reflecting layer comprises a metal oxide layer, a metal layer, and a metal oxide layer in this order,
each of the metal oxide layers has a thickness in a range of 0.005 μm to 0.1 μm,
the metal layer has a thickness in a range of 0.005 μm to 0.1 μm,
the primer layer is formed of a modified polyolefin resin having either an acid group or a hydroxyl group,
the acid group of the modified polyolefin resin is derived from at least one selected from α,β-unsaturated carboxylic acid and an acid anhydride thereof,
the hydroxyl group of the modified polyolefin resin is derived from a (meth)acrylic acid-based monomer containing a hydroxyl group,
a weight average molecular weight of the modified polyolefin resin measured by GPC is in a range of 10,000 to 200,000,
the primer layer has a thickness in a range of 0.04 μm to 11 μm,
the protective layer has a thickness in a range of 0.1 μm to 2.5 μm,
the ionizing radiation curable resin forming the protective layer is formed of an ionizing radiation curable resin oligomer, and
a weight average molecular weight of the ionizing radiation curable resin oligomer measured by GPC is in a range of 10,000 to 100,000.
2. The transparent heat shielding and insulating member according to claim 1 , wherein a normal emittance at the protective layer side in compliance with JIS R3106 is not more than 0.3.
3. The transparent heat shielding and insulating member according to claim 1 , wherein the primer layer has a thickness in a range of 0.05 μm to 10 μm.
4. The transparent heat shielding and insulating member according to claim 1 , wherein the primer layer is formed directly on the infrared reflecting layer.
5. The transparent heat shielding and insulating member according to claim 1 , wherein after a weathering test of 1000 hours in compliance with JIS A5759, the protective layer has no peeling in a cross-cut adhesion test in compliance with JIS D0202-1998.
6. The transparent heat shielding and insulating member according to claim 1 , wherein a cholesteric liquid crystal polymer layer is formed further on a surface of the transparent base opposite to the infrared reflecting layer side.