Modified PC infrared invisible sheet and preparation method thereof
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An infrared and invisible technology, applied in hat products, instruments, optical components, etc., can solve problems such as high cost and achieve good market prospects
Pending Publication Date: 2022-05-13
JIMEI UNIV
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[0004] Most of my country's infrared stealth films are purchased from companies such as Oakley in the United States, and the cost is extremely high. In particu
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[0046] Example 1
[0047] To prepare the modified PC infrared invisible sheet, the consumption of each raw material is shown in Table 1, and the preparation method is as follows:
[0048] First, the particle size of 10nm-25nm infrared nano powder A, the particle size of 5nm-15nm infrared nano powder B, the particle size of 1um-2um dispersant, the particle size of 1um-2um lubricant, plasticizer, and PC masterbatch were added in turn , stir and blend, and then use a twin-screw extruder to extract and granulate to obtain modified PC particles.
[0049] Specifically, in the above-mentioned raw materials: infrared nano powder A is silicon dioxide nano powder, titanium dioxide nano powder, ferric oxide nano powder, aluminum oxide nano powder, tungsten oxide nano powder, cesium tungstate (Cs2WO4) nano powder One or both of the following; infrared nano powder B is tungsten oxide nano powder, antimony oxide nano powder, indium oxide nano powder, tin oxide nano powder, GTO nano powder,...
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[0055] Examples 2-6
[0056] The modified PC infrared invisible sheet was prepared, and the amount of each raw material was shown in Table 1. The preparation method is the same as in Example 1.
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[0057] Example 7
[0058] The modified PC particles prepared in Example 1 were optically detected, and it was found that the modified PC particles had infrared resistance (780-2000nm wavelength) function, the inorganic nano-powders were uniformly dispersed, and the particles had high transparency after granulation. At 780nm~2000nm, the infrared absorption can reach more than 90%, and the visible light transmittance can reach more than 85%. After temperature-variable injection molding into lenses, the obtained modified PC infrared stealth sheet has infrared stealth properties, which can reduce or zero the transmittance of the electromagnetic wave radiated by the target in the working band of the infrared detector, thereby reducing the target radiation in the corresponding wavelength range. Radiation can effectively reduce the infrared exposure of the target, so as to achieve the purpose of stealth.
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Abstract
The invention relates to a modified PC infrared invisible sheet and a preparation method thereof. The modified PC infrared invisible sheet comprises the following components in parts by weight: 3-5 parts of infrared nano powder A, 5-8 parts of infrared nano powder B, 1-2 parts of a dispersing agent, 1-2 parts of a lubricating agent, 60-80 parts of a plasticizer and 1000 parts of polycarbonate (PC) master batch, the infrared nano powder A has a strong absorption characteristic in a near-infrared region and has high transmittance in a visible light region; and the infrared nano powder B can effectively block infrared and ultraviolet radiation and has extremely weak absorption rate on visible light. The modified PC infrared contact lens can shield infrared rays of middle and far infrared bands captured by a thermal imager, radiation of a target behind the infrared contact lens in a corresponding wavelength range is reduced, the transmissivity of electromagnetic waves radiated by the target in a working band of an infrared detector is reduced or is zero, infrared exposure of the target is effectively reduced, and the service life of the target is prolonged. Therefore, the purpose of invisibility is achieved.
Description
technical field [0001] The invention relates to the field of infrared stealth technology, in particular to a modified PC infrared stealth sheet and a preparation method thereof. Background technique [0002] The human eye and the surrounding muscles will radiate electromagnetic waves, although the wavelengths radiated by different use states and different parts are different, and they are all included in the range of infrared wavelengths. Infrared detectors use this radiant heat effect to detect targets. That is, the temperature rises after receiving radiant energy, and then the temperature change is measured by the contact temperature measuring element, so as to output an electrical signal or a visible image to detect the existence of the object, thereby realizing the detection of the target. [0003] At present, the temperature resolution of the infrared imaging system has reached 0.1K, and the spatial resolution is also very high. The slight difference between the camouf...
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