SOCAL® and WINNOFIL® For Printing Inks

SOCAL® and WINNOFIL®
For Printing Inks
PCC Division
Solvay Special Chemicals
Advantages of SOCAL® & WINNOFIL®
in Printing Inks
dispersion aid
gloss enhancer
rheology additive
Thixotrope
Pigment extender
SOCAL®
and
WINNOFIL®
viscosity stabilizer
reinforcing additive
2
Flow aid / anti
compaction
acid stabilizer
Anti settling agent
What are the different printing processes ?
Application
Size of
Edition
Viscosity
of Ink
Offset
Packaging, Magazines,
Newspaper, Brochures
200 – 100.000
high viscous,
paste-like
Gravure
Packaging, Catalogues, Big
Magazines
> 100.000
low viscous
Flexo
Cards, „family printings”,
Carrier Bags
Small Editions
low viscous
Screen
3D-Objects (bottles, tubes),
Labels
Small Editions
butter-like,
pseudoplastic
Where is
the Ink?
3
Offset Printing Process
Rheology of the ink is important to ensure correct ink transfer from the
blanket to the substrate, and to reproduce the image surface
Two types of curing :
Coldset – Ink is cured at room temperature
Heatset – Ink is cured/settled in the heat (150°C)
4
Benefits of SOCAL® & WINNOFIL®
in Offset Printing Inks
SOCAL® & WINNOFIL® as Rheology Additive
control of Viscosity
control of Yield Value
Improved Printability
low Misting Behaviour (elastic properties)
acid stability
reduction of Plate Wear (low abrasion)
good emulsification
Good Optical Properties
high Transparency
high Gloss
increased Pigment Efficiency (Space Holding Effect)
Improved Film properties
better rub resistance
reinforcing additive
5
SOCAL® & WINNOFIL® as Rheology
Additive in Offset Inks
Viscosity of Inks as Function of Socal & Winnofil Loading
Control of
Viscosity
Control of
Yield Value
Stable
values over
time
100
80
Viscosity 60
(Pas)
4034
20
0
0%
6
S
a
oc
l&
W
in
f
no
83
37
il
5
%
S
a
oc
l&
W
in
f
no
il
1
0%
58
49
S
a
oc
l&
W
in
f
no
il
1
5%
S
a
oc
l&
W
in
f
no
il
2
0%
S
a
oc
l&
W
in
f
no
il
Improved Printability with SOCAL® &
WINNOFIL® in Offset Inks
Positive effect on misting behaviour – Creep Test
A certain stress is applied to the sample. During this stress the elastic behaviour (Compliance)
is measured. After the stress period the speed to recover its rest structure is measured.
Formulation with
SOCAL® & WINNOFIL®
recovers its rest
structure faster
The use of SOCAL® &
WINNOFIL® has a
positive effect on
misting behaviour
7
recovery of rest structure
c h a n g e o f c o m p lia n c e , J o
a ft e r s t re s s (*1 0 -2 1 /P a )
Elasticity with SOCAL®
& WINNOFIL® is higher
than with clay
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0
0
1
2
3
4
time (s)
Socal & Winnofil
Clay
5
6
Improved Printability with SOCAL® &
WINNOFIL® in Offset Inks
High stability against Citric Acid
The Offset Printing process uses a solution of citric acid. Uncoated CaCO3 would form
Calcium Citrate which disturbs the printing process.
Stabillity against Citric Acid (min)
30
25
Acid stability can be
controlled by coating
level
20
15
10
5
0
0% Coating
8
2% Coating
3% Coating
Solvay coating
process gives very
homogeneous
coating distribution
with high acid
stability
Optical Properties of SOCAL® & WINNOFIL®
in Offset Inks
high Transparency
important for Offset Inks
ultrafine particles (50-80nm) are easy to disperse.
high Gloss
smooth and closed surface finish due to ultrafine particle size
no shear out of larger particles
good compatibility of coated SOCAL® & WINNOFIL® with varnish
increased Pigment Efficiency (Space Holding Effect)
1-3% SOCAL® & WINNOFIL® improves the pigment efficiency.
SOCAL® & WINNOFIL® helps to disperse the pigments (interparticle
friction).
SOCAL® & WINNOFIL® acts as spacer between two pigment
molecules and improve the function of the pigment.
9
Improved Film properties with SOCAL® &
WINNOFIL® in Offset Inks
SOCAL® &
WINNOFIL®
10
Clay
Gravure Printing
Solvent-based, low viscosity inks
(0.05 – 1 Pa.s)
Can be used for many applications
like magazines, packaging
printing…
Long runs with good quality
BUT gravure cylinders are really
expensive
Substrate / paper
Impression
roller
Doctor blade
Gravure
cylinder
Ink duct
The use of SOCAL® & WINNOFIL® can reduce costs :
SOCAL® & WINNOFIL® reduces formulation costs as it is less
expensive than other pigments
SOCAL® & WINNOFIL® reduces the wear of gravure cylinders,
and therefore reduces maintenance costs
11
Flexography - Process
Synonyms: Flexo, letterpress, relief
Flexo is the modern „Gutenberg“ process
12
Flexography
Printing areas stand up in relief.
Solvent- or water-based, liquid inks (low
viscosity, 0.05-1 Pa.s)
Printing plates are flexible and “soft”, made of
rubber or photopolymers (easy to produce).
Printing plates are mounted onto a cylinder
(easy to change).
13
Hiding Power with SOCAL® & WINNOFIL®
40
35
TiO2 2
TiO
Fine SOCAL®
grades give
hiding power
near to TiO2
H iding P ow er (% )
30
25
Ultrafine SOCAL®
& WINNOFIL®
grades give lower
hiding power
20
15
10
5
0
Fine P3
grade
14
Ultrafine,
31
uncoated grade
Ultrafine,
311
coated grade
Ultrafine,
312
coated grade
Ultrafine,
322
coated grade
Gloss with SOCAL® & WINNOFIL®
100
TiO2 gives highest gloss
90
80
Ultrafine coated
SOCAL® & WINNOFIL®
show gloss between
TiO2 and fine SOCAL®
70
Gloss (% )
Fine SOCAL® grades
give low gloss
fine
SOCAL® act as matting
agent
60
50
40
30
20
10
0
TiO2
Fine P3
grade
(dp=0,22µm )
Ultrafine,
31
uncoated
grade
85°
Ultrafine,
311
coated grade
Ultrafine,
312
coated grade
Ultrafine,
322
coated grade
60°
For matt inks, fine SOCAL® grades can replace TiO2 and reduce
significantly formulation costs
15
SOCAL® & WINNOFIL® in glossy inks
35
Introduction of ultrafine SOCAL®
& WINNOFIL® leads to:
increased viscosity during
mixing step
higher interparticle friction
better dispersion of the
pigment
H id in g Po w er (% )
33
31
SOCAL® & WINNOFIL® act as
spacer between two pigments
and improve function of the
pigment (spacing effect)
29
27
30pt TiO2
25pt TiO2
25 ptTiO2
TiO2 ++
25pt
2pt ultrafine
2pt 311
coated
grade
25 pt TiO2
TiO2 +
+
25pt
5pt ultrafine
5pt 311
coated
grade
5 pt of TiO2 can be replaced by ultrafine SOCAL® & WINNOFIL®
without affecting the hiding power
16
SOCAL® & WINNOFIL® in glossy inks
100
90
The addition of 2 pt of
ultrafine SOCAL® &
WINNOFIL® does not
affect the gloss
80
Gloss (%)
70
60
50
Small reduction of gloss
by addition of 5 pt of
ultrafine SOCAL® &
WINNOFIL®
40
30
20
10
0
25pt TiO2
2525pt
pt TiO2
TiO2+ +2pt
2pt 311
ultrafine coated grade
85°
25
pt TiO2
25pt
TiO2 ++ 5pt
5pt 311
ultrafine coated grade
60°
2 pt of TiO2 can be replaced by ultrafine SOCAL® & WINNOFIL®
without affecting the gloss
17
Flexography - Summary
Fine SOCAL® grades give good hiding power.
Fine SOCAL® grades act as matting agent.
For matt inks, replacement of TiO2 is possible with fine
SOCAL® grades.
For high gloss applications, small amount of ultrafine SOCAL®
& WINNOFIL® shows positive synergetic effect with TiO2.
Ultrafine SOCAL® & WINNOFIL® grades help to disperse TiO2.
Ultrafine SOCAL® & WINNOFIL® grades improve pigment function of
TiO2 by “spacing effect”.
Small reduction in gloss at 2-5 parts ultrafine SOCAL® & WINNOFIL®.
18
Screen Printing - Process
19
Screen Printing
Butter-like printing ink, solvent- or water-based, but also
plastisols
Big amount of ink is transferred (10 times more than for
other printing processes)
It is possible to print on any substrates of any shape,
thickness and size!
Demand in PVC screen coating plastisol :
matt surface
easy dispersability
no bigger particles due to smaller and smaller Screen sizes
no negative effect on optical properties
no change in viscosity
20
PVC Screen Printing Plastisols : Gloss
SOCAL
in
w allcovering
plastisols
SOCAL
in w®allcovering
plastisols
SOCAL
in wall
covering
plastisols:
Gloss
Gloss
Fine SOCAL® grades
offer :
30
25
20
G loss (G U)
very matt surface
only small increase in
viscosity
very good dispersability
cost efficient alternative to
system GCC + matting
agent
15
10
5
0
N2R
Fine
SOCAL®
GCC a
60°
21
85° 60° 85°
GCC b
PVC Screen Printing Plastisols : Optical
Properties
grades
very white optical properties
(cost saving in white
pigment)
high brightness
low yellowness to save
pigment for colour
adjustment
95
6
5
93
4
91
3
89
2
87
1
85
0
Fine
FinePCC
SOCAL®
22
GCC a
GCC b
b* (Yellowness)
Fine
offer :
SOCAL® in wallcovering plastisols
optical data
L* (Brightness)
SOCAL®
PVC Screen Printing Plastisols - Summary
Fine SOCAL® grades provide
very matt surface
very white optical properties (cost saving in white pigment)
only small increase in viscosity
very good dispersability
Ultrafine SOCAL® & WINNOFIL® grades in screen printing
plastisols
control the viscosity
act as anti settling agent
improve homogeneous dispersion (pigments, blowing agent)
They also allow the production of matt primers for wall coating
papers before overprinting with foam layers.
Fast drying appears to be a key benefit that is not seen with
natural calcium carbonate (GCC) in this application. Machines can
run faster!
23
Summary of the benefits using SOCAL® &
WINNOFIL®
The use of SOCAL® & WINNOFIL® provides you :
Quality and consistency
Control of viscosity
Good dispersability
Improved printability
Good optical properties (hiding power, gloss/matt, whiteness)
Cost reduction (maintenance, replacement of expensive pigments)
Reliable supply availability on the long run.
Technical assistance to jointly identify the most suitable grade for
your application.
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For more information, please visit our website at:
http://www.solvaychemicals.com/EN/products/pcc/default.aspx
For any type of inquiry, please feel free to contact us at the following
e-mail:
[email protected]
« To the extent that any statements made in this presentation contain information that is not historical, these
statements are essentially forward-looking. The achievement of forward-looking statements contained in this
presentation is subject to risks and uncertainties because of a number of factors, including general economic
factors, interest rate and foreign currency exchange rate fluctuations; changing market conditions, product
competition, the nature of product development, impact of acquisitions and divestitures, restructurings, products
withdrawals; regulatory approval processes and other unusual items. Consequently, actual results may differ
materially from those expressed or implied by such forward-looking statements. Forward-looking statements can be
identified by the use of words such as "expects," "plans," "will," "believes," "may," "could" "estimates," "intends",
"targets", "objectives", "potential", and other words of similar meaning. Should known or unknown risks or
uncertainties materialize, or should our assumptions prove inaccurate, actual results could vary materially from
those anticipated. The Company undertakes no obligation to publicly update any forward-looking statements”
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