Directindustry
CaCO3 filler masterbatch is used in many applications in plastic production. And blown film extrusion (or blowing film) is one of the most popular applications using calcium carbonate filler we can see in this industry.
Definition of blown film extrusion
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually, this process uses polyethylene, and they also use other materials as blends with these polymers.
Applications of blown film extrusion
Nowadays, we can find many products in daily life to use blown film extrusion techniques to make them.
- Agricultural film: mulch film, greenhouse film.
- Bags: shopping bags, garages bags, roll bags, t-shirt bags, bags for heavy products,…
- Food wrap for the supermarkets.
- Industry packaging, shrink film, stretch film.
- Consumer packaging, food wrap, transport packaging.
- Laminating film.
- Barrier film.
- Multilayer film.
- They also have had research to explore the incorporation of blown film extrusion into the large-scale manufacturing of carbon nanotube and nanowire films.
Advantages of CaCO3 filler masterbatch in blown film extrusion
As a result, producers use CaCO3 filler in blowing film applications to get benefits.
- Productivity: increase volumetric output (as a result of thermal conductivity & volumetric expansion to temperature); ability to downgauge due to higher film physical properties.
- Total save cost: reduce material cost; less energy to run the machine due to higher CaCO3 specific heat.
- Physical property: stiffness (increase stiffness as well as to get the less off-spec product); anti-block (act as anti-block agent).
Fillplas has CaCO3 filler masterbatch and you can find more details about the usage of this material in blowing film application from our website.
