Change the UV curing paste rheological agent tension
Time:2016-04-14 14:40Source:sankunClick: Number
The rheological agent has power to change the UV curing printing ink surface tension
Rheological agent has the power to change the UV curing printing ink surface tension, and the UV curing the rheological properties of paste and wettability of base material, and the rheological can reduce low viscosity UV curing paste thixotropy, for UV curing printing ink viscosity, when still in case of settlement of UV curing printing ink pigment particles.For the study of phthalein amine and polyether modified polydimethylsiloxane and rheological agent with low viscosity UV curing printing ink viscosity, the effects of using YanJi ratio of 1:1, pigment mass concentration was 5%, dispersant of pigment mass fraction is 25%, acrylic block type dispersant and dispersant 2:3 cool type distribution, adopting: TPGDA: with quality than EOEOEA 1:8:1 compound with monomer, adding different concentration of rheological agent, the number of grinding for 20 times, tested the UV curing paste viscosity changing with the shear rate. Results show that the performance of the UV curing machine be changes over its absorbance of ultraviolet light.
Not to join the rheological agent paste thixotropy of UV curing is very big, with the shear rate increases, its viscosity decreases. With the increase of rheological agent dosage, UV printing ink thixotropy. For UV absorbance become low, the UV curing machine performance is likely to become worse.
The same concentrations, add the rheological agent BYK333 UV printing ink thixotropy than add the rheological agent DR229 UV printing ink thixotropy. Shear rate at the same time, add the rheological agent DR229 UV printing ink viscosity are bigger than add the rheological agent BYK333 UV printing ink viscosity.BYK333 for polyether modified polydimethylsiloxane and rheological agent, can reduce the surface tension, is advantageous to the UV curing system of pigment wetting, has a certain resistance to flocculation effect. DR229 for poly phthalein amine rheological agent, although able to improve the adhesion resistance of the UV system, but DR229 has certain viscosity increasing at the same time, can improve the UV curing printing ink pigment subsidence resistance. So the effect of rheological agent BYK333 mainly change the UV printing ink wettability and the rheological agent DR229 role is to improve the UV curing printing ink viscosity to minimize the settlement of pigment.
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