Industrial process used to improve
wetting and adhesion properties
of polyolefin films :
BOPP Bioriented Polypropylene
OPP Oriented Polypropylene
automotive 3D plastic components as :
other special application as:
flame treatment for assemby of headlight bodies
surface flame treatment on blow- molded plastic bottles
Main process, it consists, on flame running,
against the surface of the material, to be treated.
Such surface, could be modified in terms of energy and surface tension,
so improving wettability to prepare it
for next applications as printing, painting, coating, lacquering.
Polyolefin materials, and in particular PP polypropylene have many properties / advantages as:
can be worked and shaped quite easily
can get good mechanical properties, if properly worked
are very good electric insulators
Anyway they are ‘ apolar ‘ on their surfaces, ( poor surface energy).
This is the reason why they need to be treated, in order to make possible their coating with inks, paints, adhesives, metal,
and other materials typically coupled with polyolefins, in industrial applications as flexible packaging or automotive production 3D parts.
A typical flame treatment plant installed in a BOPP line – basically – is composed of the following units:
1. Burner (water cooled), that produces a suitable flame for web surface treating.
2. Treater roll (water cooled), that supports the web, by cooling it under the flame passage, and by allowing in this way , prevention on overheating dameges, on film surface.
3. Nip roll (suitably rubbered), having the duty to eliminate air layers/blisters between film surface and treater roll, that could compromise the right thermal exchange.
FLAME TREATMENT PROCESS VARIABLES
A) Mixture flow
B) Mixture composition – Air/Gas ratio
C) Air Gap
D) Treater roll temperature
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by design, building, service and application,
is the world leader on the production of surface flame treatment system
for plastic web to be used for
adhesive tapes, printing, metallization, lamination, laquering, coating, painting
for paper , cardboard, metallized cardboards, printed paper, coated paper and
aluminium laminated sheets
FLAME TREATMENT: variables and results expected ultima modifica: 2015-06-08T16:12:00+00:00 da