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Preparation process of water-soluble glue for curtain coating self-adhesive label
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A curtain coating, water-soluble technology, applied in the direction of adhesives, film/sheet adhesives, polymer adhesive additives, etc., can solve the problem of increasing waste water, wasting time and electric energy, curtain instability, etc. question
Active Publication Date: 2022-05-06
汕头市松炀新材料特种纸有限公司
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However, curtain coating has high requirements on glue and operation level. If there is something wrong, it is easy to cause various curtain instability. The subsequent shutdown and adjustment will not only waste a lot of time and electric energy, but also cause Increased generation of wastewater waste
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Embodiment 1
[0027] Embodiment 1 glue formula
[0028] The basic formula of water-based glue is the applicant's previous long-term use-verified formula: methyl methacrylate: 40 parts, butyl acrylate: 35 parts, ethyl acrylate: 22 parts, acrylic acid: 8 parts, methylol acrylamide: 3 parts, sodium lauryl sulfate: 2 parts, ammonium persulfate: 0.8 parts, deionized water: 60 parts. The preparation method comprises the steps of preparing a pre-emulsion and adding an initiator to carry out emulsion polymerization.
[0029] For the modification of the glue formula, the applicant has tried a large number of different formulas, and only some representative examples are selected in this application document:
[0030] Glue 1: the basic formula above;
[0031] Glue 2: the above basic formula + 1 part of rhamnolipid;
[0032] Glue 3: the above basic formula + 2 parts of lauryl polyoxyethylene ether;
[0033] Glue 4: the above basic formula + BYK-410 2 parts;
[0034] Glue 5: the above basic formula...
Embodiment 2
[0035] Embodiment 2 glue is to the improvement effect of curtain coating stability
[0036] Using the above-mentioned small / experimental curtain coater to test the minimum curtain flow rate of various glue formulations (that is, no non-curtain, T-shaped curtain or curtain hole), the results are shown in the following table:
[0037] Table 1 The minimum curtain flow of various glue formulations
[0038]
[0039]
[0040] The results show that adding rhamnolipid or lauryl polyoxyethylene ether on the basis of SDS can effectively reduce the minimum curtain flow rate, increase the operating space and overall coating stability. Using BYK-410 alone has no obvious effect, but BYK-410 and rhamnolipid or lauryl polyoxyethylene ether can significantly further enhance the effects of both.
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Abstract
This application provides the production process and application of water-soluble glue for curtain coating self-adhesive labels, which contains environmentally friendly biosurfactant rhamnolipid or lauryl polyoxyethylene ether and rheological additive BYK‑410 . The glue of the present application can effectively improve the stability of curtain coating, reduce power waste and waste water pollution caused by adjustments and shutdowns; it is combined with a water-soluble release agent to form an environmentally friendly and high-quality self-adhesive production process.
Description
technical field [0001] The present application relates to the fields of self-adhesive label manufacturing and glue manufacturing. Specifically, the present application provides a water-soluble glue for curtain coating self-adhesive labels and its application. Background technique [0002] Self-adhesive labels are widely used in the fields of medicine, daily chemicals, logistics and daily life, and are currently one of the most widely used special papers (according to the statistics of the Pressure Sensitive Label Association, the current annual output in my country has reached or even exceeded 5 billion square meters Meter). Self-adhesive labels are composed of backing paper, release coating, glue coating, surface material and other parts. Compared with the more stated paper and release agent, glue and its coating method are more concerned factors in the research and production of self-adhesive labels. [0003] The types of glue used for self-adhesive labels mainly include ...
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Application Information
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