Intermediate film for laminated glass, and laminated glass
First Claim
1. An interlayer film for laminated glass having a two or more-layer structure and having a thickness of one end thinner than a thickness of the other end at the opposite side of the one end, comprising a first layer containing a polyvinyl butyral resin as a thermoplastic resin, triethylene glycol di-2-ethylhexanoate as a plasticizer, an ultraviolet ray screening agent, and an oxidation inhibitor;
- and a second layer containing a polyvinyl butyral resin as a thermoplastic resin, triethylene glycol di-2-ethylhexanoate as a plasticizer, an ultraviolet ray screening agent, and an oxidation inhibitor;
wherein the difference between the maximum thickness and the minimum thickness in the first layer is smaller than the difference between the maximum thickness and the minimum thickness in the second layer,the first layer contains cesium-doped tungsten oxide particles as a heat shielding compound, andwhen a distance between the one end and the other end of the interlayer film is defined as X, an excitation purity is 2.9 or less at a point positioned at a distance of 0.1X from the other end being thick in thickness of the interlayer film toward the one end of the interlayer film.
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Abstract
There is provided an interlayer film for laminated glass with which a low yellow index value, low excitation purity and high heat shielding properties can be achieved in spite of the thickness varying with places. The interlayer film for laminated glass according to the present invention has a two or more-layer structure, has a thickness of one end thinner than a thickness of the other end at the opposite side of the one end and includes a first layer containing a thermoplastic resin and a second layer containing a thermoplastic resin, the difference between the maximum thickness and the minimum thickness in the first layer is smaller than the difference between the maximum thickness and the minimum thickness in the second layer, and the first layer contains a heat shielding compound.
26 Citations
14 Claims
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1. An interlayer film for laminated glass having a two or more-layer structure and having a thickness of one end thinner than a thickness of the other end at the opposite side of the one end, comprising a first layer containing a polyvinyl butyral resin as a thermoplastic resin, triethylene glycol di-2-ethylhexanoate as a plasticizer, an ultraviolet ray screening agent, and an oxidation inhibitor;
- and a second layer containing a polyvinyl butyral resin as a thermoplastic resin, triethylene glycol di-2-ethylhexanoate as a plasticizer, an ultraviolet ray screening agent, and an oxidation inhibitor;
wherein the difference between the maximum thickness and the minimum thickness in the first layer is smaller than the difference between the maximum thickness and the minimum thickness in the second layer, the first layer contains cesium-doped tungsten oxide particles as a heat shielding compound, and when a distance between the one end and the other end of the interlayer film is defined as X, an excitation purity is 2.9 or less at a point positioned at a distance of 0.1X from the other end being thick in thickness of the interlayer film toward the one end of the interlayer film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- and a second layer containing a polyvinyl butyral resin as a thermoplastic resin, triethylene glycol di-2-ethylhexanoate as a plasticizer, an ultraviolet ray screening agent, and an oxidation inhibitor;
Specification