Blown Film Grade LDPE Selection Guide: Balancing Processing Stability and Film Optical Properties
Film manufacturers often face common challenges: unstable bubbles during film blowing, high film haze, rolled film blocking, or jamming on automatic packaging lines. The basic properties of raw materials, additive systems, and melt flow characteristics interact closely. Choosing a suitable LDPE resin is the core solution. Shenhua 2426H is a widely referenced general-purpose blown film LDPE grade in the film industry.
Basic Performance Analysis of Shenhua 2426H
Shenhua 2426H is a high-pressure, low-density polyethylene (LDPE) for film applications. Its melt flow rate is 1.9 g/10min (190°C / 2.16kg, ISO 1133), with a density of 0.924 g/cm³ (ISO 1183). This grade is pre-compounded with standard slip and anti-block additives, eliminating extra additive mixing for converters and simplifying formula trials. It is a preferred test material known as LDPE 2426H.
Optical performance is a vital factor for film selection. Films produced from Shenhua 2426H feature stable haze and consistent gloss, suitable for packaging films with basic aesthetic requirements. Thanks to its rational molecular weight distribution and moderate melt strength, the bubble stays stable during extrusion, enabling better thickness uniformity and reducing production waste.
Main Application Scenarios of Shenhua 2426H
Shenhua 2426H fits multiple film categories: laminating substrates for food packaging, daily commodity packaging films, surface protective films, as well as foamed cushion materials. The material complies with mainstream international food contact regulations, making it qualified for films with direct food contact.
Processing Reference for Shenhua 2426H Blown Film
Many converters overlook proper temperature matching during LDPE extrusion. For Shenhua 2426H, the recommended barrel temperature range is 160–190°C, and die temperature should be kept at 180–200°C. Excessively high temperature triggers resin degradation, leading to fisheyes and odors. Insufficient temperature causes incomplete plasticization and weaker tensile properties.
Moreover, this grade can be blended with LLDPE to adjust film toughness and heat-sealing window, adapting to film production with different thickness specifications.
Key Points for Raw Material Selection
Buyers should distinguish different manufacturers’ products labeled 2426H. Variations in additive loading and melt flow can be found among different suppliers of 2426H LDPE. Directly copying process parameters from other brands will easily cause production faults. With a fixed additive formulation, Shenhua 2426H delivers reliable batch consistency, ideal for long-term standardized production lines.
Conclusion
For factories seeking general blown film LDPE with easy processability, balanced optical performance and built-in slip & anti-block additives, Shenhua 2426H is a viable option. Process engineers should prioritize plasticizing temperature and blow-up ratio tests after receiving the material to match production lines quickly and cut trial costs.
