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Full Description of PVC Plastisols

2014-06-13 09 Check: +,
Half-matte appearance
 
Half-matte with reticulate pattern:Using LIFELIKE Yilin series of colored ink 
for printing directly and the ink will reach ground and be kept there without flowing.
Reticulate pattern can stay clear after solidification, which help weaken gloss.
We recommend another method to make matte appearance.
 
Use transparent ink for render followed by 19733 matte ink.
This method still has disadvantage that matte could become
pale if too more colored ink get added in. The more you add in,
the paler matte will be. So addition of colored ink shall be controlled.
 
Making Matte:
 
In most cases, the full matte realizes through adding foaming agent,
chemical matte agent or through hot pressing.
① The advantage of adding physical foaming agent is to keep appearance as good as chamois.
    But the disadvantage is that the color turns pale and heating temperature range is narrow
    because matte effect changes as temperature changes.
 
② Adding chemical matte agent into ink and incompatible component
    will get out onto the pattern surface after ink gets dry forming matte.
    But the disadvantage is it’s easy for matte to be washed or wiped off.
 
③ Hot pressing uses non-smooth paper to make matte.
    The disadvantage is that light and matte can only cover the full page rather than a section.
 
 Making Light:
 
①  Room temperature glossy ink with natural levelling property
     depends on gravity to eliminate reticulation because
     its viscosity is low after printing.
 
② High temperature glossy ink with melting levelling property depends
    on gravity to eliminate reticulation after ink gets heated under high
    temperature and viscosity becomes low (1). LIFELIKE 18110 is a typical
    this kind of ink and LIFELIKE 28150 is kind of ink with both
    room temperature natural levelling property and high temperature
    melting levelling property.
 
Notes: (1) The exact meaning of low viscosity here is low cutting speed and low viscosity.
 
Description about glossiness of PVC plastisol ink
 
Continuous phase comes on plastics after it dissolves and then it becomes glossy.
Thus, ink is essentially glossy. Its physical intensity becomes weaker
when continuous phase gets broken to make matte appearance.
Based on this theory, please do not change heating temperature or
add powder or other chemical accessories for matte appearance.
 
Description about heat treatment to PVC plastisol ink

① Melting Temperature: PVC plastisol ink is typical thermoplastic plastic product.
They melt, flow and re-shape under high temperature.
People tend to ignore the melting temperature of PVC plastisol ink.
We come up with round angle plastisol ink flowing under melting
temperature to make use of melting phenomenon.
At the same time in order to prevent melting so as not to affect printed pattern’s outline,
the right angle plastisol ink turns up which does not flow under melting temperature.

② Solidification Temperature: Normally the solidification temperature of plastisol
ink is lower than melting temperature. The former is 150℃ while the later is around 170℃.

③ Above description about solidification and melting temperature is for easy understanding.
In fact plastisol ink does not solidify at a definite temperature
but between a range of temperature.
For example LIFELIKE 18110 ink’s physical intensity keeps
the same when heated at 130℃ for 180 seconds and at 150℃ for 30 seconds,
with the same thickness of 1mm.