Oleophobic and hydrophilic coating for cigarette tipping paper and preparation method thereof
A cigarette tipping paper and oleophobic technology, which is applied in the field of cigarettes, can solve the problems of not being able to simultaneously meet the oil barrier performance of cigarette packaging and joint performance, and achieve good coating effect
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[0033] see Figure 4 , the present invention further provides a method for preparing cigarette tipping paper, comprising:
[0034] S11, providing a base paper for tipping paper, the base paper for tipping paper has opposite first and second sides;
[0035] S12, providing an oil-repellent coating, printing or coating the oil-repellent coating on the first surface to obtain a first oil-repellent layer;
[0036] S13, providing an oleophobic and hydrophilic coating, the oleophobic and hydrophilic coating and the above-mentioned oil-repellent coating respectively have a compatible resin matrix;
[0037] S14, printing or coating the oleophobic and hydrophilic coating on the first oil-repellent layer to prepare a first oleophobic and hydrophilic layer, and obtaining the tipping paper for cigarettes.
[0038]In step S12, after the oil-repellent paint is printed or coated on the base paper of the tipping paper, all the solvents in the oil-repellent paint are volatilized, so as to obt...
Embodiment 1
[0058] The formula (mass percentage) of oleophobic hydrophilic coating in the present embodiment is as follows: 30% aqueous polycarbonate, 15% activated calcium carbonate, 25% ethanol, 26% water, 1% smooth agent, 1% anti-settling agent, 1% leveling agent, 1% defoamer.
[0059] The preparation method of described oleophobic hydrophilic coating is as follows:
[0060] (1) Mix ethanol and water and stir evenly to obtain a solution;
[0061] (2) adding water-based polycarbonate to the above solution, stirring evenly to obtain an emulsion;
[0062] (3) active calcium carbonate is added in the above-mentioned emulsion, stir evenly, obtain a suspension;
[0063] (4) Add slip agent, anti-sedimentation agent, defoamer, and leveling agent to the above-mentioned suspension;
[0064] (5) Sand mill the suspension obtained in step (4) for 60 min to obtain an oleophobic and hydrophilic coating with a fineness of 25 μm and a viscosity of 22 s (24° C., British 3# Charn cup).
[0065] The p...
Embodiment 2
[0070] The formula (mass percentage) of oleophobic hydrophilic coating in the present embodiment is as follows: 30% aqueous polycarbonate / polyurethane mixed emulsion, 15% talcum powder, 28% ethanol, 25% water, 0.5% smooth agent, 0.5% anti-corrosion Settling agent, 0.5% leveling agent, 0.5% defoamer.
[0071] The preparation method of described oleophobic hydrophilic coating is as follows:
[0072] (1) Mix ethanol and water and stir evenly to obtain a solution;
[0073] (2) adding the aqueous polycarbonate / polyurethane mixed emulsion to the above solution, stirring evenly to obtain an emulsion;
[0074] (3) Add talcum powder to the above-mentioned emulsion, stir evenly to obtain a suspension;
[0075] (4) Add slip agent, anti-sedimentation agent, defoamer, and leveling agent to the above-mentioned suspension;
[0076] (5) Sand mill the suspension obtained in step (4) for 60 minutes to obtain an oleophobic and hydrophilic coating with a fineness of 23 μm and a viscosity of 22...
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