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A kind of high-barrier polyvinyl alcohol coating for lining paper coating and preparation method thereof

A polyvinyl alcohol, high-barrier technology, applied in paper coating, papermaking, coating, etc., can solve the problems of increased scrap rate, non-conformity, insufficient folding accuracy, etc., and achieve the effect of enhancing wet strength

Active Publication Date: 2015-11-04
HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Due to the simple process of the composite lining paper, the requirements for cigarette packaging equipment are relatively low, and the folding accuracy of the vacuum aluminum-coated lining paper is not enough, and the cost is relatively high. At present, the domestic tobacco industry basically uses the composite lining paper. Lining paper, while foreign cigarette lining paper basically uses vacuum aluminized lining paper
[0003] Although composite lining paper has strong plasticity when applied to cigarette packaging and good stability of packaging equipment, but the aluminum foil layer is relatively thick, generally 7-9 μm, which consumes a lot of metal aluminum, and the composite processing process of lining paper Among them, it is necessary to use composite adhesives containing volatile organic solvents such as benzene, alcohols, and ketones, which are not easy to degrade and recycle, and have poor environmental protection performance, which does not meet the current construction of a "resource-saving and environment-friendly" society. requirements
Vacuum aluminum-coated paper has good processability, high brightness, and a very thin aluminum layer, generally only 0.025-0.035 μm, which is easy to degrade, and water-based auxiliary materials are generally used in the processing process, which is non-toxic and harmless. The focus of the factory, but because the aluminum coating is too thin: First, the paper surface flatness is extremely high, especially in the transfer process, because the paper surface flatness is not enough and the transfer glue creeps, so that the aluminum coating is dense Its barrier and moisture-proof properties are lower than that of aluminum foil composite lining paper, so it can be used as lining paper to delay the mildew rate of the packaged objects, promote the alcoholization of the packaged objects, maintain the unique style of the packaged objects, and improve the quality of the packaging materials. The main functions such as the quality of the packaging are affected; second, it is easy to cause scratches, fingerprints, and aluminum removal, increasing the scrap rate
[0004] Based on the various problems of traditional lining paper, people have invented a kind of aluminum-free lining paper while looking for solutions. Using a simple coating method, a layer of functional metal luster is coated on the lining paper substrate. Coatings can maintain a good appearance after embossing, but the coating of this kind of lining paper is easy to fall off, the wet strength is lower than 15%, the barrier performance is poor, and it cannot play an excellent role in moisture resistance and fragrance preservation

Method used

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  • A kind of high-barrier polyvinyl alcohol coating for lining paper coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, add 12 kg of polyvinyl alcohol into 81.5 kg of deionized water, start stirring at a speed of 200 rpm, raise the temperature to 85°C and keep it for 1.5 hours to completely dissolve; then cool down to 65°C, add 0.01 kg of ethanol, 0.005 kg Phosphoric acid, 0.01 kg of maleic acid and 2.2 kg of methyl etherified melamine resin were reacted for 2 hours; the temperature was lowered to 38°C again, and the stirring speed was raised to 800 rpm, and 2.19 kg of xylan and 1.6 kg of methyl etherified melamine resin were added. The melamine resin was completely reacted after 0.8 hours; finally, 0.235 kg of ethyleneimine and 0.25 kg of silicon dioxide were added, stirred thoroughly for 2 hours, left to stand, cooled, and discharged.

[0027] The coating test was carried out on a 45g / ㎡ inner lining paper substrate. The coating coating amount was 1.5g / ㎡. 602g / m 2 ·day, the air permeability is 1795ml / m 2 · day · Pa.

Embodiment 2

[0029] First, add 14 kg of polyvinyl alcohol into 80.68 kg of deionized water, start stirring at a speed of 300 rpm, raise the temperature to 95°C and keep it for 1.7 hours to completely dissolve; then cool down to 68°C, add 0.008 kg of ethanol, 0.003 kg Citric acid, 0.007 kg of p-toluenesulfonic acid and 2 kg of methyl etherified urea-formaldehyde resin were reacted for 2.4 hours; the temperature was lowered to 38°C again, and the stirring speed was raised to 500 rpm, and 2 kg of xylan and 0.8 kg of formaldehyde were added Etherification of urea-formaldehyde resin, the reaction is complete after 0.5 hours; finally add 0.3 kg of ethyleneimine and 0.2 kg of silicon dioxide, stir thoroughly for 1.5 hours, let stand, cool, and discharge.

[0030] The coating test was carried out on a 45g / ㎡ inner lining paper substrate. The coating amount was 1.0g / ㎡. 548g / m 2 ·day, the air permeability is 15800ml / m 2 · day · Pa.

Embodiment 3

[0032] First, add 13 kg of polyvinyl alcohol into 79.76 kg of deionized water, start stirring at 230 rpm, raise the temperature to 88°C and keep it for 1 hour to completely dissolve; then cool down to 66°C, add 0.005 kg of ethanol, 0.005 kg Citric acid, 0.007 kg of maleic acid, 0.5 kg of methylated melamine resin, 1.5 kg of methylated urea-formaldehyde resin were reacted for 3 hours; the temperature was lowered to 40°C again, and the stirring speed was raised to 700 rpm, and 4 kg of Xylan, 0.3 kg of methyl etherified melamine resin, 0.7 kg of methyl etherified urea-formaldehyde resin, the reaction is complete after 0.5 hours; finally add 0.1 kg of ethyleneimine, 0.12 kg of silicon dioxide, fully stir for 1 hour, stand still, and cool ,Discharge.

[0033]The coating test was carried out on a 50g / ㎡ inner lining paper substrate. The coating coating amount was 2.2g / ㎡. 580g / m 2 ·day, the air permeability is 1740ml / m 2 · day · Pa.

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Abstract

The invention relates to high-barrier polyving akohol coating for coating lined paper. The coating comprises the following raw materials of, by weight, 12-16% of polyving akohol, 2.1-3.8% of amino resin, 0.01-0.015% of catalysts, 0.05-0.3% of wet strength agents, 2-4% of xylan, 0.1-0.25% of anti-blocking agents, 0.005-0.01% of antifoaming agents and 78-83% of deionized water. The invention further provides a preparation method of the high-resistance polyving akohol coating for coating the lined paper. The coating is directly coated on a lined paper substrate of 45-80g / m<2>, and has good adhesive force and barrier property. After the coated lined paper is wetted or soaked into the water, the tensile strength of the coated lined paper is higher than 30%. Trial results show that the coated lined paper can be completely applied to high-speed presses and packing machines.

Description

technical field [0001] The invention relates to a high-barrier polyvinyl alcohol coating used for coating inner lining paper and a preparation method thereof, belonging to the field of new polymer materials. Background technique [0002] Cigarette lining paper is the paper packaged between cigarettes and cigarette packs. There are two main types: calendered aluminum foil composite lining paper (hereinafter referred to as "composite lining paper") and vacuum aluminized lining paper. The main function is to prevent moisture and maintain fragrance. Due to the simple process of the composite lining paper, the requirements for cigarette packaging equipment are relatively low, and the folding accuracy of the vacuum aluminum-coated lining paper is not enough, and the cost is relatively high. At present, the domestic tobacco industry basically uses the composite lining paper. Lining paper, while foreign cigarette lining paper basically uses vacuum aluminized lining paper. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/20D21H19/26D21H19/14D21H21/20D21H21/06D21H21/12
Inventor 邢青涛黄宏存
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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