Product Description

Opening Agent Silica for Plastic Films is a core functional anti-blocking raw material exclusively designed for the plastic film processing industry. Refined via the sol-gel method and precise surface modification technology, it strictly complies with industry standards, EU EN 14639, and relevant Food Contact Material (FCM) regulations. With ultra-high purity silica (≥99.8%) as the core component, it features optimized particle morphology and particle size distribution tailored to the key demands of plastic film production—thinning, high transparency, and high-speed processing. Non-agglomerated and easily dispersible, it forms a uniform and dense micro-protrusion isolation structure in anti-blocking masterbatches, which can effectively reduce the blocking force between films for the long term and completely solve industry pain points such as tight winding of film rolls and difficult unwinding. Meanwhile, it has no adverse effects on critical film performance indicators including light transmittance, haze, heat seal strength, and tensile properties. Fully compatible with the large-scale production of anti-blocking masterbatches for various plastic film substrates such as PE, PP, PVC, PET, BOPP, and CPP, it is an all-in-one anti-blocking solution for films that combines versatility and high performance. (Note: Silica is used to produce anti-blocking masterbatches for corresponding films, which are then applied in film production. Silica cannot be directly added to films.)

Technical Parameters

Application

Focusing on the core anti-blocking pain points of plastic films, Opening Agent Silica for Plastic Films is precisely tailored in physical and chemical properties to meet the production requirements of various film anti-blocking masterbatches, providing efficient, stable and long-lasting anti-blocking support for all types of plastic films. Its core application values are as follows:

1. Empowering efficient production of film-specific anti-blocking masterbatches: With uniform particle size and modified surface structure optimized for film resin characteristics, it can be evenly mixed with various film carrier resins such as LLDPE, PP and PET, with a filler loading flexibly adjustable from 10% to 30%. The masterbatches feature no precipitation, no crystal spots and no agglomeration during formation, and cause no equipment wear in subsequent film blowing, casting and biaxial stretching processes. The melt flow index of anti-blocking masterbatches with 20% of this product added stabilizes at 2.5-3.0g/10min, perfectly meeting the stringent requirements of high-speed film processing.

2. Permanently solving film blocking issues in all scenarios: Only 0.2%-0.8% of the prepared anti-blocking masterbatch needs to be added to plastic films. Silica particles form a uniform and stable micro-protrusion isolation layer on the film surface, reducing the contact area between films by more than 60% and the blocking force from 500mN/25mm to below 50mN/25mm. It completely resolves industry pain points such as tight film winding, blocking during high-temperature storage, blocking during low-temperature lamination, and attenuation of anti-blocking performance after long-term storage, with long-lasting and stable anti-blocking effects.

3. Maximally protecting the core optical and mechanical properties of films: Relying on film-specific surface modification technology, it has excellent compatibility with various film resin matrices and causes no negative impact on the core performance of films after addition—PE film maintains a light transmittance of over 90%, a tensile strength decrease of ≤3%, and a heat seal strength retention rate of ≥95%. Even 20μm thin films can maintain excellent low haze and high transparency, meeting the quality requirements of high-end films.

4. Full coverage of all plastic film substrates: Fully compatible with the production of anti-blocking masterbatches for all types of plastic films including PE (LDPE, LLDPE, mPE), PP (homopolymer, copolymer), flexible PVC, PET, BOPP and CPP. It provides precisely adapted anti-blocking effects for food packaging flexible films, daily chemical packaging laminated films and heavy-gauge industrial films alike.

5. Improving the processing efficiency of the entire film industry chain: It effectively enhances film anti-blocking performance, boosting the overall processing efficiency of subsequent processes such as high-speed film slitting, printing, lamination, bag making and packaging by 30%. It significantly reduces the defective rate and downtime loss caused by film blocking, lowering the comprehensive production costs of enterprises. Meanwhile, it improves the unwinding experience of end packaging products and increases product added value.

Factory Advantages

• Custom modification capability for exclusive film applications: Custom surface modification solutions (e.g., amino silane modification for enhanced compatibility, phenyl silane modification for improved temperature resistance, high-transparency modification for optimized optical properties) can be provided according to film substrate types (e.g., PE, PP, BOPP), film applications (food packaging, daily chemical packaging, industrial films), thickness specifications and processing technologies (film blowing, casting, biaxial stretching), precisely meeting the anti-blocking requirements of different films.
• Uncompromising performance stability guarantee: Adopting a fully automated closed-loop production line, the coefficient of variation of particle size distribution is precisely controlled to ≤10%, and the specific surface area difference between batches is ≤3%. This ensures formulation stability in anti-blocking masterbatch production, completely avoiding film quality problems such as poor anti-blocking performance, increased haze and crystal spots caused by fluctuations in opening agent performance, and adapting to large-scale and standardized production needs.
• Full-process technical service support: A professional technical team provides full-process technical support from parameter selection, masterbatch formula optimization, film forming testing to mass production implementation, quickly solving various technical problems encountered by customers in the production process.

Frequently Asked Questions

Q: Can this Opening Agent Silica for Plastic Films be used in the production of anti-blocking masterbatches for food contact packaging films?

A: Yes. This product strictly complies with global mainstream food contact material standards such as FDA 21 CFR §177.1520, EU No 10/2011 and China GB 4806.6, and a complete third-party compliance test report can be provided. It has no compliance risks when applied in anti-blocking masterbatches for various food packaging films such as PE, PP and PET.

Q: How to select the parameters of this opening agent for 20μm thin high-transparency PE blown films?

A: For thin high-transparency films, our technical team will targetedly optimize the product's particle size and specific surface area parameters, recommend narrow particle size distribution fine-grade models, and accurately match the surface modification solution and optimal addition amount. While ensuring excellent anti-blocking effects, it minimizes the impact on film light transmittance and haze, balancing high transparency and long-lasting anti-blocking performance.

Q: Is there any compatibility issue between this opening agent and common film additives such as slip agents, antistatic agents and antioxidants?

A: No. This product has passed comprehensive compatibility tests with film additives and has excellent compatibility with common slip agents such as erucamide and oleamide, as well as various film additives including antistatic agents, antioxidants and light stabilizers. No chemical reaction, delamination or crystal spots occur after mixing. It also has a synergistic effect with slip agents, further reducing the film friction coefficient from 0.3 to below 0.15 and simultaneously improving film anti-blocking and processing performance.

Q: What is the customization cycle for exclusive modified models after small-batch trial use?

A: No long waiting is required. We have a modular surface modification production line dedicated to films, which can quickly switch modification solutions and production parameters on the basis of the original process. The customization cycle can be shortened to 7-10 days. Meanwhile, we provide performance comparison tests before and after modification and full-process verification services, helping customers quickly complete product iteration and reduce R&D cycle and costs.

Certifications & Honors

• FSSC22000 Food Safety System Certification
• ISO22000:2018 Food Safety Management System Certification
• ISO9001:2015 Quality Management System Certification
• SHC HALAL Certification
• OU KOSHER Certification
• FDA Food Contact Material Certification
• FAMI-QS Feed Additive Quality Management System Certification
• SEDEX Social Accountability Certification
• Food Additive Production License
• Feed Additive Production License
• National High-Tech Enterprise
• Guangzhou Specialized, Sophisticated, Unique and Novel Enterprise
• 17 authorized patents from the National Intellectual Property Administration