Quick selection
- Optical priority, low iron
- CENSIL 773
- Tight appearance requirement
- CENSIL 779
- Conventional cost position
- CENSIL 185P
What does silica do in plastic film antiblock?
- Reduce interlayer blocking in film rolls and improve opening, winding and unwinding efficiency.
- Balance antiblock effect, haze, clarity, coefficient of friction and dispersion.
- Offer low-iron, high-purity and conventional precipitated silica candidate routes.
Who is this track for?
- PE, PP, PET, BOPP, BOPET, CPP and PA film manufacturers.
- Food packaging film, industrial packaging film, laminating film and functional film companies.
- Film customers producing their own masterbatch or working closely with functional masterbatch plants.
Which CENSIL grades are used for plastic film antiblock?
Low-iron high-purity routes and a conventional precipitated route, so optical requirements and cost position can both be tested. Final selection follows your film type, target haze, opening and COF requirements.
We publish the selection logic, not the numbers. Data sheets are issued per enquiry so the figures match the current supplier revision and your application.
The low-iron, high-purity route where film optics matter. Usually the first antiblock candidate for clear packaging film and the masterbatch that feeds it.
TDS · specifications · COA on requestThe same low-iron platform, aimed at tighter downstream appearance requirements — and the powder route for masterbatch plants whose customers judge the film by eye.
TDS · specifications · COA on requestA conventional precipitated comparison route for film antiblock. Run it beside 773 or 779 when cost position has to be part of the decision.
TDS · specifications · COA on requestHow do you test a silica for plastic film antiblock?
| Test dimension | What to watch | What it tells you |
|---|---|---|
| Antiblock performance | Interlayer separation and opening force | Tells you the core performance |
| Haze and clarity | Change in film optical appearance | Tells you packaging appearance fit |
| Coefficient of friction | Slip, conveying and converting behaviour | Tells you downstream efficiency |
| Dispersion | Gels, fish-eyes or streaks | Tells you film quality stability |
| Process fit | Extrusion, screen pack and bubble stability | Tells you the line-introduction risk |
Which reference brands do customers benchmark against?
Trademarks belong to their respective owners and are named for orientation only. No equivalence is claimed; fit is confirmed by your own trial.
Which grade should you start with?
CENSIL 773 / 779 can be run first as the low-iron, high-purity route, with CENSIL 185P as a conventional precipitated comparison. Final selection follows the customer's film type and target haze, opening and friction requirements.