Heat ray shielding material

A heat ray shielding material having a metal particles-containing layer that contains at least one type of metal particles and a binder, wherein the thickness of the metal particles-containing layer is from 10 nm to 80 nm, the metal particles contain tabular metal particles having a hexagonal to circular form in a ratio of at least 60% by number relative to the total number of the metal particles, the binder in the tabular metal particles-containing layer has a crosslinking structure derived from a crosslinking agent, and the crosslinking group density ratio, as calculated according to the following formula (1) when the binder has a pair of crosslinking systems that comprise two types of crosslinking groups and calculated according to the following formula (2) when the binder has two or more pairs of crosslinking systems that comprise three or more types of crosslinking groups, is from 0.3 to 30:

• Binder Crosslinking Group Density Ratio=([B])/[A] Formula (1)
• wherein [A] and [B] each indicate the crosslinking group density of the crosslinking systems A and B at mol/g in the binder, respectively;
• and when the crosslinking groups are contained in two or more types of high-molecular weight substances or low-molecular-weight substances, [A] is the crosslinking group density in the high-molecular-weight substance having a highest solid concentration and [B] is the crosslinking group density in the high-molecular weight substance having a secondly higher solid concentration or in the low-molecular-weight substance;
• Binder Crosslinking Group Density Ratio=([B]+[C])/[A] Formula (2)
• Wherein [A], [B] and [C] each indicate the crosslinking group density of the crosslinking systems A, B and C at mol/g in the binder, respectively;
• and when the crosslinking groups are contained in three or more types of high-molecular weight substances or low-molecular-weight substances, [A] is the crosslinking group density in the high-molecular-weight substance having a highest solid concentration, [B] is the crosslinking group density in the high-molecular weight substance having a secondly higher solid concentration, [C] is the crosslinking group density in the high-molecular-weight substance having a thirdly higher solid concentration or in the low-molecular-weight substance.