Aqueous gravure ink composition for pvc sheet, and PVC decoration sheet using same
A technology of gravure ink and composition, applied in the directions of ink, application, household appliances, etc., can solve the problems of slow drying of water-based gravure ink composition, difficult drying of large-volume gravure printing, and restriction of large-volume printing production, etc., to prevent Environmental pollution or risk to human health, stable bonding, effects of improved printing quality
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preparation example Construction
[0059] In an example of preparing PUD disclosed here, 0.5 wt% of triethylamine (TEA, produced by Junsei Chemical Co., Ltd.) was used as a neutralizing agent. In this preparation, the neutralization step included the process of introducing a neutralizing agent, specifically adding triethylamine to the prepolymer, followed by stirring for 30 minutes.
[0060] An emulsifier was introduced into the composition after the neutralization step to obtain a PUD, namely PUD1, with improved compatibility with methanol.
[0061] Examples of emulsifiers may include alkyl phosphate, ammonium (POE) alkyl aryl ether sulfate, sulfosuccinate, sodium sulfosuccinate (sodium dioctyl sulfosuccinate) and its analogues. In this example, 0.97% by weight of sodium sulfosuccinate (DO113L, manufactured by Dongnam Whasung Co. Ltd.) was used as an emulsifier.
[0062]More specifically, as previously stated, in a further embodiment, by introducing an emulsifier into the composition (primary composition), t...
example 1-1
[0081] In the case of Example 1-1, where the methanol content was 10 wt%, in the drying performance test (after 120 mesh gravure printing, ink transfer was determined based on each drying condition (temperature×time)) the ink composition was found to be transferred to the printed Surface (wet, not completely dry). Correspondingly, in order to achieve fast drying, preferably, based on 100 parts by weight of the PUD containing the emulsifier, the content of methanol is 54 parts by weight to 128 parts by weight. More specifically, methanol is included in the total ink composition in an amount ranging from 30 wt% to 45 wt%.
[0082] In Table 3, dryness 1 was measured after the ink composition was dried in an oven at 45° C. for 35 seconds, and dryness 2 was measured after the ink composition was dried in an oven at 60° C. for 30 seconds. The conditions used for the drying performance test also apply to the following specification. Initial viscosity was determined by using a Brook...
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