A good combination of drawdown, seal strength, and hot tack strength is obtained.
The perforation resistance, the heat seal initiation temperature and the hot tack strength of such films are improved.
Embodiments may have the advantage of improved seal strength, hermeticity, hot tack and reduced-temperature sealability.
The layers therefore have a high degree of hot tackiness but are also extremely dimensionally stable in processing conditions.
Heat sealable polymeric films are found to have low minimum seal temperatures and beneficial hot tack performance.
The hot tack strength of these films is at least 2.0 Newtons/inch at 135°C, according to ASTM F 1921-98, measured with DTC instrumentation.
The optical properties of biaxially oriented polypropylene films can be retained while the sealing temperature is lowered and the heat seal strength and the hot tack performance properties are improved.