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High-brightness holographic anti-counterfeiting transfer coating and preparation method thereof
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A holographic anti-counterfeiting and transfer coating technology, which is applied in camouflage coatings, coatings, etc., can solve the problem of solvent resistance sacrifice, etc., and achieve the effects of wide molding range, wide gravure printing adaptability, and excellent leveling
Active Publication Date: 2016-08-31
SHANGHAI WEIKAI CHEM
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Domestic patent "CN200910199797.1 A kind of laser moldable alcohol-soluble aluminized transfer coating and its preparation method and application" shows that its brightness (L value) is 89-93 in the embodiment to illustrate its "high brightness of molded laser" (compared to The water-soluble aluminum plating transfer coating is 70-86), but its specular reflectance is not explained (actual research results <85%), and the formula is an alcohol-soluble system, compared with the transfer coating with ester ketones as the main solvent Although the environmental protection is improved, the solvent resistance is greatly sacrificed.
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Embodiment 1-3
[0043] The following examples relate to a high-gloss holographic anti-counterfeiting transfer coating and a preparation method thereof, said method comprising the steps of:
[0044] (1) Calculate and weigh the resin components according to formula table 1:
[0045] (2) Put the solvent part in the reaction kettle, turn on the stirring device to stir evenly and heat to 40-60°C;
[0046] (3) Put the resin component into the reactor, control the stirring rate to 600-800rpm, and dissolve for 3-5 hours until the resin component is completely dissolved (no solid particles remain);
[0047] (4) After the resin component is completely dissolved, put the additives into the reaction kettle, control the stirring speed at 800-1200rpm and stir for about 30 minutes until the additives are evenly dispersed, and obtain the sample;
[0048] (5) Measure the solid content of the sample (according to the actual design value), and adjust the solid content of the sample to the design value by addin...
Embodiment 4-7
[0067] The following examples relate to high-brightness holographic anti-counterfeiting transfer coatings and preparation methods thereof. The methods are described in Examples 1-3. The components of the coatings in each example are shown in Table 2. In Table 2, the values are percentages by weight.
[0068] The resin component is composed of 5 kinds of resins, including the following components: styrene-acrylic copolymer, methyl methacrylate homopolymer; acrylate copolymer, nitrocellulose resin, vinyl acetate resin;
[0069] Wherein, the styrene-acrylic copolymer is a copolymer of styrene and acrylate monomers, the glass transition temperature ranges from 80 to 130° C., and the molecular weight is from 50,000 to 150,000.
[0070] The Tg range of the methyl methacrylate homopolymer is 100-130° C., and the molecular weight is 50,000-150,000.
[0071] The acrylate copolymer is a copolymer formed by the polymerization of methyl (meth)acrylate and ethyl (meth)acrylate, with a Tg...
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Abstract
The invention relates to high-brightness holographic anti-counterfeiting transfer coating and a preparation method thereof and belongs to the technical field of holographic transfer aluminizing anti-counterfeit packaging materials. The high-brightness holographic anti-counterfeiting transfer coating comprises the following components: 5-40% of a resin component, 60-95% of a solvent component and 0-2% of an auxiliary component, wherein the resin component comprises the following five resins: 30-50% of styrene-acrylate based copolymer, 20-40% of methyl methacrylate resin, 5-30% of acrylate copolymer resin, 2-20% of cellulose nitrate resin and 5-20% of vinyl chloride-vinyl acetate copolymer; a ketone solvent accounts for more than 50% of the solvent component. The invention also discloses a preparation method of the high-brightness holographic anti-counterfeiting transfer coating. The high-brightness holographic anti-counterfeiting transfer coating has excellent levelling property, a film obtained after coating by adopting a ceramic roller is bright in surface, and levelling defects like colourfulness are not caused; the obtained film has high brightness similar to metallic lustre after being subjected to mould pressing and aluminizing, a unique holographic anti-counterfeiting effect is realized, and a mould pressing applicable range is wide; an obtained coating layer can be directly applied to gravure printing and has relatively broad gravure printing adaptability.
Description
technical field [0001] The invention relates to the technical field of holographic transfer aluminized anti-counterfeiting packaging materials, in particular to a high-brightness holographic anti-counterfeiting transfer coating and a preparation method thereof. Background technique [0002] Due to its bright decorative effect and strong eye appeal, holographic transfer aluminized anti-counterfeiting packaging materials have made rapid progress in the fields of cigarette packaging, wine box packaging, high-end toothpaste, cosmetics and other paper packaging in recent years. Among the many holographic packaging products, the high-brightness holographic products with metallic luster (aluminized film or transfer paper obtained after compounding and peeling off the aluminized film) won the favor of consumers for its almost perfect three-dimensional holographic visual sense, and once became the The hot spot that the market is chasing. [0003] The "high brightness" of high-bright...
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