HST1W CPP T095 Opaque Films Optimize Flexible Packaging Efficiency

HST-1(W) CPP T095, a white opaque cast polypropylene film, is designed for candy packaging and surface printing applications in which processing efficiency and visual presentation determine the competitiveness of the finished product. The co-extruded film combines a corona-treated layer, a white polypropylene core and an untreated heat-sealable layer, according to product specifications.

Film structure targets sealing and print efficiency

The three-layer co-extrusion structure is intended to deliver sealing integrity while the built-in white core removes the need for a white ink base coat during packaging. That design reduces printing costs and simplifies the production process, the specifications state.

The film is reported to offer a stable coefficient of friction and strong hot tack, allowing it to run on high-speed packaging lines. Improved opacity of more than 60 percent, together with high gloss, supports the appearance and coverage required for general lamination, outer packaging and surface printing.

Core technical parameters

The moisture vapour transmission rate of less than 13 g/m²/day at 38°C and 90 percent relative humidity places the film within the barrier range typically required for confectionery wrapping, while the density of 0.95 g/cc is consistent with standard polypropylene-based structures.

Mechanical performance and selection guidance

In mechanical terms, the film shows tensile strength of 350–650 kg/cm² in the machine direction and 180–250 kg/cm² in the transverse direction, a level described as sufficient for the stresses of routine packaging operations.

Heat seal strength reaches 1300 to 2200 g/25mm at 130°C and 2.0 bar, with the specific result depending on film thickness. Users are advised to match the selected gauge to the weight of the packaged contents and the required seal integrity.

Because sealing performance varies across the 15–30 micron thickness range, the specifications recommend confirming the final seal parameters against the chosen gauge before full-scale production.