A kind of heat insulation EVA adhesive film and preparation method thereof

Abstract

The invention relates to the technical field of heat-insulating materials, in particular to a heat-insulating EVA adhesive film and a preparation method thereof. The present invention uses the modified powder with vanadium dioxide as the matrix and doping with an appropriate amount of other metal elements, and cooperates with an appropriate amount of other additives and coating matrix to make the phase transition temperature of the vanadium dioxide in the prepared functional layer When the temperature is lowered to 36°C or below, a reversible mutation occurs in the optical transmission performance in the infrared region, so that the near-infrared transmittance of the EVA film can be intelligently adjusted. When the temperature exceeds 36°C, the infrared rejection rate is controlled at 90%. And above, below 36 ℃, the infrared blocking rate is controlled to 50% or below, while ensuring high visible light transmittance, low light reflectance, and no light pollution that is prone to occur in traditional LOW‑E glass. Using the heat-insulating EVA film prepared by the invention to make EVA laminated glass and applying it to glass curtain walls or doors and windows can better achieve the purpose of keeping warm in winter and cool in summer, and is especially suitable for northern regions of my country.

Description

technical field

[0001] The invention relates to the technical field of heat insulating materials, in particular to a heat insulating EVA adhesive film and a preparation method thereof. Background technique

[0002] In the 21st century, with the depletion of energy and the deterioration of the environment, the governments of various countries have higher and higher requirements for energy conservation and emission reduction, and people urgently need more energy-saving and environmentally friendly green products. At present, Low-e laminated glass (such as EVA laminated glass) is the most used to make curtain walls or doors and windows. Although it has the effect of warming in winter and cooling in summer, it still has the defects of light pollution and low service life.

[0003] In addition, it is known that under low temperature conditions, vanadium dioxide films have high transmittance in visible light, infrared light, radio frequency bands and microwave bands, but at high t...

Examples

Embodiment 1

[0024] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0025] 60g modified powder (W doped with VO 2 , the amount of substance in W is VO 2 2% of the amount of the substance), 10g of a wetting dispersant (TDL-ND1) and 130g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 30%, the quality of the dispersant accounts for 5%, and the quality of ethyl acetate accounts for 65%.)

[0026] Stir 790g of EVA ink and 10g o...

Embodiment 2

[0030] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0031] 60g modified powder (W doped with VO 2 , the amount of substance in W is VO 2 2% of the amount of the substance), 10g of a wetting dispersant (TDL-ND1) and 130g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 30%, the quality of the dispersant accounts for 5%, and the quality of ethyl acetate accounts for 65%.)

[0032] Stir 780g of EVA ink and 20g o...

Embodiment 3

[0036] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0037] 75g modified powder (Ta and W co-doped VO 2 , the amount of substance in W is VO 2 0.6% of the amount of substance, the amount of substance of Ta is VO 20.2% of the amount of the substance), 24g of a wetting dispersant (EFKA-4310) and 201g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 25%, the quality of the dispersant accounts for 8%, and the qual...

technical field

[0001] The invention relates to the technical field of heat insulating materials, in particular to a heat insulating EVA adhesive film and a preparation method thereof. Background technique

[0002] In the 21st century, with the depletion of energy and the deterioration of the environment, the governments of various countries have higher and higher requirements for energy conservation and emission reduction, and people urgently need more energy-saving and environmentally friendly green products. At present, Low-e laminated glass (such as EVA laminated glass) is the most used to make curtain walls or doors and windows. Although it has the effect of warming in winter and cooling in summer, it still has the defects of light pollution and low service life.

[0003] In addition, it is known that under low temperature conditions, vanadium dioxide films have high transmittance in visible light, infrared light, radio frequency bands and microwave bands, but at high t...

Examples

Embodiment 1

[0024] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0025] 60g modified powder (W doped with VO 2 , the amount of substance in W is VO 2 2% of the amount of the substance), 10g of a wetting dispersant (TDL-ND1) and 130g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 30%, the quality of the dispersant accounts for 5%, and the quality of ethyl acetate accounts for 65%.)

[0026] Stir 790g of EVA ink and 10g o...

Embodiment 2

[0030] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0031] 60g modified powder (W doped with VO 2 , the amount of substance in W is VO 2 2% of the amount of the substance), 10g of a wetting dispersant (TDL-ND1) and 130g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 30%, the quality of the dispersant accounts for 5%, and the quality of ethyl acetate accounts for 65%.)

[0032] Stir 780g of EVA ink and 20g o...

Embodiment 3

[0036] This embodiment provides a heat-insulating EVA film and a method for preparing a heat-insulating EVA film. The specific steps are as follows:

[0037] 75g modified powder (Ta and W co-doped VO 2 , the amount of substance in W is VO 2 0.6% of the amount of substance, the amount of substance of Ta is VO 20.2% of the amount of the substance), 24g of a wetting dispersant (EFKA-4310) and 201g of ethyl acetate were stirred evenly to obtain a premix. Add the premix to the pin-type sand mill, and add 0.2mm yttrium-modified zirconia beads to the sand mill, control the temperature of the premix to be equal to or lower than 38°C, and the stirring speed to be 1200RPM. The grinding time is 2-4 hours, and the particle size of the premix is ​​sampled every 30 minutes of grinding, and the particle size of the premix is ​​ground to 25 nm to obtain a slurry. (In the slurry, the quality of the modified powder accounts for 25%, the quality of the dispersant accounts for 8%, and the qual...

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