Fruit fresh-keeping paperboard and preparation method thereof

[0018] A fruit fresh-keeping cardboard. The fruit fresh-keeping cardboard is composed of cardboard base paper and a fresh-keeping coating coated on its surface. The cardboard base paper is mainly made of waste paper, and the basis weight is 90-100g / m 2 , mainly fresh-keeping coating for playing fresh-keeping effect, it is characterized in that, the main component of fresh-keeping coating is white silica ethylene absorbent and nisin, natamycin biological antibacterial preservative, the quantitative of fresh-keeping coating is 5 ~30g / m 2 .

[0019] Preparation of fruit preservation cardboard

[0020] ① Use waste paper as the main raw material to make pulp through crushing, high-concentration deslagging, flaking, low-concentration deslagging and screening, and use a rotary screen paper machine or a stacked screen paper machine to copy and shape it, and mechanically press and dry it into quantitative pulp. 90g / m 2 cardboard base paper.

[0021] ②Put 100 kg of white silica, 50 ...

[0023] Embodiment 2: the preparation of fruit fresh-keeping cardboard

[0024] ① Use waste paper as the main raw material to make pulp through crushing, high-concentration deslagging, flaking, low-concentration deslagging and screening, and use a rotary screen paper machine or a stacked screen paper machine to copy and shape it, and mechanically press and dry it into quantitative pulp. 90g / m 2 cardboard base paper.

[0025] ②Put 100 kg of white silica, 150 kg of kaolin, 1 kg of sodium polyacrylate, 0.05 kg of nisin and 0.03 kg of natamycin into the high-speed disperser, then add 80 kg of water, start the high-speed dispersion for 0.5 hours, until the After complete dispersion, filter to make a pigment dispersion. Add 50 kg of oxidized starch and 80 kg of water into the dissolving tank, start the agitator to stir evenly, heat to 90-95°C, and continue to stir for 0.5 hours until it dissolves to form oxidized starch liquid. Pump the pigment dispersion liquid into the paint mix...

[0027] Embodiment 3: the preparation of fruit fresh-keeping cardboard

[0028] ① Use waste paper as the main raw material to make pulp through crushing, high-concentration deslagging, flaking, low-concentration deslagging and screening, and use a rotary screen paper machine or a stacked screen paper machine to copy and shape it, and mechanically press and dry it into quantitative pulp. 90g / m 2 cardboard base paper.

[0029] ② Add 100 kg of white silica, 100 kg of kaolin, 0.5 kg of sodium polyacrylate, 0.03 kg of nisin and 0.01 kg of natamycin into the high-speed disperser, then add 80 kg of water, and start the machine for 0.5 hours of high-speed dispersion until the After complete dispersion, filter to make a pigment dispersion. Add 20 kg of oxidized starch and 80 kg of water into the dissolving tank, start the agitator to stir evenly, heat to 90-95°C, and continue to stir for 0.5 hours until it dissolves to form oxidized starch liquid. Pump the pigment dispersion liquid i...