High-end silica opening agent, a core functional material for producing opening masterbatches in plastic processing, is manufactured through advanced techniques like sol-gel method. It strictly complies with industry standards, EU EN 14639 regulations, and food contact material (FCM) specifications. Zhonglian's high-end silica opening agent, boasting over 99.8% ultra-high purity, forms uniform "micro-protrusions" in opening masterbatches. This structure effectively reduces inter-film adhesion while maintaining transparency and mechanical properties, making it suitable for producing opening masterbatches across various plastic substrates including PE, PP, PVC, PET, BOPP, and CPP.

Table parameters

Application description

Zhonglian high-end opening agent silica, through precise regulation of physical and chemical properties, deeply match the core needs of opening masterbatch production, to provide efficient opening support for plastic films, sheets and other products, the core application value is as follows:
1. Enabling High-Efficiency Preparation of Open Masterbatch: The nano-scale homogeneous particle size ensures uniform blending with carrier resins like LLDPE and PP, achieving 10%-30% filler content. Masterbatch molding prevents material segregation while maintaining equipment durability during subsequent blow molding or casting processes. Taking PE blow molding open masterbatch as an example, adding 20% of this opening agent stabilizes the melt index at 2.5-3.0g/10min, meeting high-speed blow molding requirements.
2. Significantly reduced film adhesion: When added to plastic films at 0.2%-0.8% concentration, silica particles create uniform micro-convex structures on the surface. This innovation reduces inter-film contact area by over 60%, cutting adhesion force from 500 mN/25mm² to below 50 mN/25mm². The solution effectively resolves "tight winding" issues during film processing, boosting efficiency in slitting, printing, and bag-making operations by up to 30%.
3. Ensuring Critical Performance Stability: Utilizing advanced surface modification technology with excellent resin matrix compatibility, the PE film maintains over 90% light transmittance while achieving ≤3% reduction in tensile strength and ≥95% heat-seal strength retention. When applied to food-grade PET packaging films, it passes stringent food safety certifications and demonstrates stable performance at processing temperatures ≤200℃°C, meeting high-temperature sterilization requirements for packaging applications.
4.Versatile substrate compatibility: Capable of producing open masterbatches for PE (low-density, linear low-density), PP (homopolymer, copolymer), PVC (soft), PET, and other substrates. For example, in PP cast film open masterbatches, it effectively addresses high-temperature storage adhesion issues. In PVC shrink film open masterbatches, it prevents the haze increase caused by traditional additives like talc powder, maintaining haze below 5%.

Factory advantage

•Customization and modification capability: according to the type of carrier resin of open masterbatch (such as PE, PP, PET) and the demand of target products (food packaging, industrial packaging), surface modification schemes can be customized (such as amino silane modification to enhance compatibility, phenylsilane modification to improve temperature resistance), and different processing processes can be adapted (blowing, casting, extrusion);
•Performance stability guarantee: the automatic closed-loop production line is adopted, the variation coefficient of particle size distribution is less than or equal to 10%, and the difference of specific surface area between batches is less than or equal to 3%, so as to ensure the stability of the formula during the production of open masterbatch and avoid the film quality problems caused by the fluctuation of open agent performance;

Frequently Asked Questions

Q: Can the opening agent be used in the production of food contact grade opening masterbatch?
A: Yes. Our products comply with food contact standards such as FDA 21 CFR §177.1520 and EU No 10/2011, and can provide third-party test reports. There is no compliance risk in the application of PE and PET opening masterbatch for food packaging.
Q: How to select appropriate opening agent parameters (e.g. specific surface area, particle size) according to the type of film?
A: The technical team will provide 2-3 sets of parameter solutions according to your target film substrate (such as "LLDPE blown film"), film thickness (such as "20μm thin specification"), processing technology and opening requirements, and verify the optimal parameters through the whole process of masterbatch preparation-film molding-opening performance test.
Q: Is there any compatibility problem between the opening agent and other additives (such as antioxidant and slip agent) in the masterbatch?
A: Not at all. Our products have undergone compatibility testing and demonstrate excellent compatibility with common antioxidants and emollients (such as eicosamide and oleamide). When mixed, they show no chemical reactions or stratification, and synergize with emollients to further reduce the film friction coefficient from 0.3 to below 0.15.
Q: If you need to adjust the modification type after a small batch trial, do you need to wait for a long time?
A: No need to wait long. We have a modular surface modification production line that can quickly switch between modifier types based on existing production processes, shortening the customization cycle to 7-10 days. We also provide performance comparison test data before and after modification to help customers quickly verify effects and reduce R&D cycle costs.

Qualification Honor

•FSSC22000
•ISO22000：2018
•ISO9001：2015
•SHC HALAL
•OU  KOSHER
•FDA attestation 
•FAMI-QS
•SEDEX
•Food additive production license
•Feed additive production license
•National high-tech enterprise
•Specialized, refined and new enterprises in Guangzhou
•17 patents from the State Intellectual Property Office