Slow release type mildew-proof molecular sieve as well as mildew-proof drying agent and preparation method thereof
A molecular sieve and slow-release technology, applied in separation methods, botanical equipment and methods, chemical instruments and methods, etc., can solve the problems of no anti-mold effect, poor anti-mold effect, etc.
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Embodiment 1
[0018] An anti-mildew desiccant, calculated in parts by weight, comprises the following components: 100 parts of bentonite, 80 parts of sepiolite, 40 parts of cross-linked sodium polyacrylate, and 50 parts of slow-release anti-mildew molecular sieve.
[0019] Among them, the slow-release anti-mildew molecular sieve, calculated in parts by weight, includes the following components: fumigant and mustard oil, PEG4000, water-based resin E100, plasticizer and molecular sieve with a particle size of 1mm.
[0020] The preparation method of the slow-release anti-mildew molecular sieve is as follows:
[0021] Add 200 parts of molecular sieves with a particle size of 1mm in the coating pan, keep the temperature at room temperature, and adjust the rotation speed to 60r / min; then add 25 parts of fumigant, keep the rotation speed constant, for 10 minutes, to ensure that the molecular sieve can fully absorb the fumigant; add mustard 35 parts of oil, keep the rotation speed constant, and the...
Embodiment 2
[0025] An anti-mildew desiccant, calculated in parts by weight, comprises the following components: 180 parts of bentonite, 140 parts of sepiolite, 30 parts of cross-linked sodium polyacrylate, and 90 parts of slow-release anti-mildew molecular sieve.
[0026] Among them, the slow-release anti-mildew molecular sieve, calculated in parts by weight, includes the following components: fumigant and mustard oil, PEG2000, water-based resin S100, plasticizer and molecular sieve with a particle size of 2 mm.
[0027] The preparation method of the slow-release anti-mildew molecular sieve is as follows:
[0028] Add 110 parts of molecular sieves with a particle size of 1mm in the coating pan, keep the temperature at room temperature, and adjust the speed at 60r / min; add 20 parts of fumigant, keep the speed constant, and keep the speed constant for 10 minutes to ensure that the molecular sieve can fully absorb the fumigant; add mustard oil 30 parts, keep the rotation speed constant, and ...
Embodiment 3
[0032] Calculation of theoretical dosage of desiccant:
[0033] U=30.4×C×A×R×M×DRF / B
[0034] U: number of desiccant units
[0035] A desiccant unit is defined as: at 25°C equilibrium temperature, according to the adsorption capacity of the desiccant, the weight of the desiccant required to absorb the following weights of water vapor in different humidity environments.
[0036] 3.00g at 20% relative humidity,
[0037] 6.00g at 40% relative humidity.
[0038] A: The inner surface area of the moisture barrier packaging bag (excluding the sealing area) (in 2 )
[0039] R: Water vapor transmission rate of the moisture barrier packaging bag ([g / 100in 2 ] / 24h)
[0040] M: maximum storage time (month)
[0041] DRF: desiccant reduction factor (see Table 1 below)
[0042] B: The minimum moisture absorption capacity of the desiccant at MIH (maximum humidity in the package) (g / unit)
[0043] C: 0.01 area constant (100in 2 / in 2 )
[0044] Table 1 Desiccant reduction factor ...
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