Light-scattering, thermal-insulating and thermal-radiation regulating membrane and preparation method

Abstract

The invention discloses a light-scattering, thermal-insulating and thermal-radiation regulating membrane and a preparation method thereof. The regulating membrane comprises a light-scattering layer and a light-absorbing and radiation layer, wherein the light-scattering layer comprises film-forming resin and a high-refraction-index micropowder material; the light-absorbing and radiation layer comprises film-forming resin, heat-conducting micropowder as well as a light-absorbing and thermal-radiation micropowder material. The thickness of the prepared light-scattering, thermal-insulating and thermal-radiation regulating membrane is 100-140 mu m, and the thickness ratio of the light-scattering layer to the light-absorbing and radiation layer is 5:2. With the adoption of the light-scattering, thermal-insulating and thermal-radiation regulating membrane prepared with the method, under the full sun condition, the light-scattering and thermal-insulating rate of sunlight can be up to 85%, the shading rate of the sunlight can be up to 99.5%, and an environment with the appropriate temperature can be provided for growth of crops.

Description

technical field [0001] The invention relates to an astigmatism heat-insulating heat-radiation regulating film and a preparation method thereof. The astigmatism heat-insulating heat radiation regulating film is suitable for agricultural production in dark environments such as edible fungi and white asparagus, softening cultivation of vegetables such as garlic yellow, chives, and celery, and animal husbandry The utility model relates to facility agriculture such as temperature control, early or delayed temperature adjustment of fruit trees during dormancy; it belongs to the field of agricultural technology. Background technique [0002] In the 1950s, countries such as Japan, Europe and the United States began to apply plastic films to agricultural production. The use of this technology brought about changes in agricultural production methods and a leap in productivity. Japan has used film covering technology on vegetables, flowers and fruit trees. The United States is mainly ...

AI Technical Summary

Problems solved by technology

[0007] Although reflective films and sunshade nets are widely used in the agricultural field, they cannot meet the needs of modern agricultural production due to their technical and structural factors.

One is that the reflective film in agriculture has a large area; the area reflects light, which will form bright and dazzling white pollution.

The second is that the sunshade net has a limited effect on sunshade and heat insulation, and cannot meet the requirements of agricultural reduction.

The third is that the reflective film has a large light loss, low reflectivity, and no thermal radiation emission capability; the sunshade net absorbs sunlight to generate a large amount of heat energy, which increases the temperature of the air around the net, and the far infrared rays generated will emit heat radiation in both directions, indirectly increasing the temperature of the facility

The heat insulation and cooling effects of the two are not significant

[0008] The existing light-temperature-regulating functional films have the following defects: (1) the astigmatism covering effect is poor, and the sunlight covering rate is not high; (2) the heat insulation function is poor, and the effect of heat insulation and cooling on agricultural facilities is not obvious; (3) Single function, shading, heat insulation, cooling and warming cannot be achieved at the same time

[0009] Therefore, there is no ideal light and temperature control film in agricultural production.

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