Coding
technology
of
flexible
packaging.
Traditional
flexible
packaging
coding
technology
relies
on
letterpress
printing,
and
uses
the
characters
on
the
character
frame
to
create
images.
Images
are
mechanically
imprinted
or
rolled
onto
the
film
surface.
Common
letterpress
printing
techniques
include
hot
printing,
wet
ink
and
ink
wheel
printer.
In
recent
years,
Continuous
Inkjet
Printing
System
(CIJ)
has
also
been
applied
in
flexible
packaging.
Ink-jet
coding
machine
prints
various
data
on
primary
packaging
and
paper
boxes,
including
simple
date
codes,
logos,
barcodes
and
serial
numbers.
Traditional
letterpress
printing
technology
and
continuous
ink-jet
printing
system
have
their
own
advantages,
but
they
also
have
many
shortcomings,
such
as
the
traditional
hot
carbon
ribbon
coding
machine
and
ink
wheel
coding
machine
can
not
print
in
real
time,
and
need
to
manually
update
the
date
and
batch
number,
which
limits
the
traceability;
In
printing,
there
is
no
standard
LOGO,
barcode
or
rotary
image
printing
method,
and
every
printed
character
needs
word
grain.
In
production,
the
hot
carbon
tape
coder
needs
"warm-up
time"
before
operation,
and
"cooling
time"
when
changing
information,
which
will
prolong
the
production
time.
Once
the
word
size
is
not
accurately
aligned,
the
packaging
film
will
be
worn
out.
In
addition,
the
worn
or
lost
characters
will
make
the
printed
results
unreadable,
and
the
length
of
hot
carbon
ribbon
is
relatively
short.
The
average
length
of
domestic
carbon
ribbon
is
only
100
meters.
Ink
of
ink
wheel
printer
needs
time
to
dry
or
may
produce
stains,
and
the
stains
need
special
cleaning
solution
to
clean.
Moreover,
most
ink
wheels
need
to
be
preheated
(it
takes
up
to
30
minutes
to
heat
the
ink
wheels
and
code
them)
and
cooled
before
changing
the
code
content.
