Sheathing paper containing bamboo charcoal particles

Abstract

The invention discloses sheathing paper containing bamboo charcoal particles, which comprises a substrate and a heat insulation layer, wherein the heat insulation layer contains nano bamboo charcoal particles of which the particle diameter is less than 1,000 nm, preferably 100 nm. The sheathing paper adsorbs incidence near-infrared light and converts the adsorbed incidence near-infrared light intoa far-infrared light form which is easily absorbed by a human body to release so as to achieve the effect of heat insulation.

Description

technical field [0001] The invention relates to a heat-insulating paper, in particular to a heat-insulating paper containing nano bamboo charcoal particles in a heat-insulating layer. Background technique [0002] According to previous studies, among the solar radiation heat sources, the visible light range accounts for 44% of the solar radiation heat source, and the near-infrared light accounts for 53% of the solar radiation heat source. Among them, the near-infrared light cannot be recognized by human eyes, but it will Causes an intense burning sensation on the skin. Therefore, thermal insulation paper is generally attached to the glass of buildings or automobiles to isolate the near-infrared light from the outside. [0003] Generally, the method of reducing the near-infrared light transmittance on thermal insulation paper can be divided into two types: absorption type and reflection type. Such as figure 1 Shown is the heat insulation mechanism of an existing absorbing ...

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Problems solved by technology

like figure 1 Shown is the heat insulation mechanism of an existing absorbing heat insulating paper, the absorbing heat insulating paper 100 is easy to reach heat absorption saturation under the continuous irradiation of incident light 110, and releases the accumulated thermal radiation energy in the form of near-infrared light 120 , resulting in poor insulation

At present, the newer absorbing heat-insulating paper, such as ceramic nano-film heat-insulating paper, can absorb the incident near-infrared light and convert it into far-infrared light with lower energy. The hardness of ceramic materials is high, which is not conducive to the production of nano-scale ceramic particles by mechanical grinding. Therefore, vacuum sputtering is often used to sputter ceramic targets on the substrate to form ceramic nano-films. The processing is cumbersome and requires high-purity substrates. And the target material, and it takes a considerable time to form the required thickness, resulting in high cost and difficult production

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