1. Product Overview

Synthetic Silica Opening Agent is a high-end plastic opening raw material prepared by artificial synthesis technology (sol-gel method + precise surface modification). It strictly complies with industry standards, the EU EN 14639 standard and relevant specifications for Food Contact Materials (FCM), with the CAS No. 14808-60-7. With ultra-high purity synthetic silica (≥99.8%) as the core material, it is free of natural impurities, with uniform particles and excellent dispersibility. Its refractive index ranges from 1.45 to 1.50, close to that of resins such as PE and PP, resulting in minimal impact on light transmittance. Optimized for the opening needs of plastic films in terms of particle morphology and particle size distribution, it can form a delicate and uniform "micro-protrusion" isolation structure on the film surface, effectively solving the pain points of film adhesion and difficult opening. Meanwhile, it has excellent thermal stability and chemical inertness, without affecting the light transmittance, mechanical properties and processability of films. Widely adaptable to the production of opening masterbatches and direct addition for various plastic films including PE, PP, PET, BOPP and CPP, it is the preferred raw material for high-end film opening. Compared with natural silica opening agents, it features more stable performance and stronger compatibility, and can be made into opening masterbatches with a concentration of 10-25% for uniform dispersion use. (Note: Silica is used to produce opening masterbatches for corresponding films, which are then applied in film production. Silica cannot be directly added to films for use.)

2. Technical Parameters

3. Application Advantages

Relying on the precise controllability of artificial synthesis technology, Synthetic Silica Opening Agent focuses on the core opening needs of plastic films and provides an efficient, stable and high-quality opening solution for various mid-to-high-end films, with the following core application values:

1. Efficient preparation of opening masterbatches, adaptable to large-scale production: Adopting artificial synthesis technology, it has far better particle uniformity and dispersibility than natural silica, and can be uniformly mixed with various carrier resins such as PE, PP and PET, with the filling amount flexibly adjustable to 10%-30%. No precipitation, no crystal points and no agglomeration occur during masterbatch forming; no equipment wear is caused in subsequent processing such as film blowing, casting and biaxial stretching, with highly stable batch-to-batch performance, suitable for the large-scale continuous production needs of 10,000-ton level opening masterbatches. Meanwhile, it can effectively adsorb the exposed macromolecular chains on the film molecular surface, further improving the opening effect.

2. Efficient and long-lasting opening, solving core film pain points: When the prepared opening masterbatch is added at 0.2%-0.6% to the film, a delicate and uniform "micro-protrusion" isolation layer can be formed on the film surface. The physical spacing effect reduces the contact area between films and lowers the van der Waals force and electrostatic adsorption force, reducing the contact area between films by more than 70% and the adhesion force from 500mN/25mm to below 40mN/25mm. It completely solves the problems of tight film winding, difficult opening, adhesion during high-temperature storage and opening failure after long-term storage. The opening effect is long-lasting and stable, with obvious reduction effect on static/dynamic friction coefficient.

3. High purity & impurity-free, ensuring product quality: Free of natural impurities and harmful pollutants with a purity of over 99.8%, it is approved by the FDA for direct use in food contact films and complies with relevant European standards. After addition, it does not affect the light transmittance, haze and mechanical properties of films - the light transmittance of PE and PP films remains above 91%, the tensile strength decreases by ≤2.5%, and the heat seal strength retention rate is ≥96%, meeting the quality requirements of mid-to-high-end packaging films. Meanwhile, it can improve the "end yellowing" phenomenon and enhance the appearance quality of films.

4. Compatible with all film types, wide application scenarios: Fully applicable to various plastic films including PE (LDPE, LLDPE), PP, PET, BOPP and CPP. Whether it is food packaging films, daily chemical packaging films, medical packaging films, industrial films or agricultural films, it can provide a precisely adapted opening effect. It can replace imported similar synthetic silica opening agents to achieve cost-effective import substitution, and is especially suitable for high-end films such as BOPP biaxially oriented polypropylene films.

5. Excellent thermal stability, adaptable to various processing technologies: With excellent thermal stability, it has no decomposition, no agglomeration and no yellowing at a processing temperature of ≤240℃, with the particle structure kept intact. It is perfectly adaptable to various high-temperature and high-speed processing technologies such as film blowing, casting, biaxial stretching and extrusion, without affecting the subsequent printing and laminating performance of films, helping customers improve processing efficiency and product qualification rate.

4. Factory Strengths

• Precise and controllable synthesis process: Adopting the sol-gel synthesis process, key indicators such as product particle size, specific surface area and pore structure can be precisely customized by regulating core parameters such as reaction temperature, pH value and reactant concentration. Meanwhile, surface modification solutions can be customized according to the type of carrier resin and film application, perfectly matching customers' personalized opening needs. The preparation process can realize precise control of parameters such as average pore size and oil absorption value, with more stable performance.
• High purity quality guarantee: A full-process purity control system has been established. From raw material procurement to finished product delivery, multiple purification and testing processes are carried out to ensure the product is free of natural impurities and harmful pollutants, with the purity stably maintained above 99.8% and the batch-to-batch purity difference ≤0.1%, meeting the quality requirements of mid-to-high-end films and complying with global food contact relevant standards.
• Fast delivery & technical support: With an 8,000 tons/year specialized production line for synthetic silica, safety stock is always available for regular models to achieve fast delivery within 5-7 days. A professional technical team can provide full-process technical support from parameter selection, masterbatch formula optimization, processing technology debugging to mass production implementation, quickly solving customers' production problems. It also provides product test reports to ensure production compliance.

5. Frequently Asked Questions

Q: What are the core advantages of this Synthetic Silica Opening Agent compared with natural silica opening agents?

A: The core advantages are mainly reflected in three aspects: First, higher purity, free of natural impurities, without affecting the appearance and quality of films, and certified by the FDA for use in food contact scenarios; Second, more stable performance, with better particle uniformity and dispersibility, small batch-to-batch performance difference, suitable for large-scale production; Third, better opening effect, with more regular particle morphology, achieving high-efficiency opening at a low addition amount, and having a smaller impact on the optical performance of films. Its refractive index is more matched with resins, resulting in better transparency, and it has no crystalline structure, avoiding the risk of silicosis with higher safety.

Q: Can this opening agent be used for the production of high-transparency PET films?

A: Yes. Through precise particle size regulation (1.8-3μm) and surface modification optimization, its refractive index is close to that of PET resin, which can minimize the impact on the light transmittance and haze of PET films. Adding 0.3%-0.5% can achieve an excellent opening effect without affecting the tensile strength and thermal stability of PET films, perfectly adapting to the production needs of high-transparency PET films, especially suitable for BOPET films.

Q: Is the performance of this opening agent stable in the production of biaxially oriented BOPP films?

A: The performance is stable. With excellent thermal stability and dispersibility, it has no decomposition, no agglomeration and no precipitation during the high-temperature processing of BOPP biaxial stretching (200-230℃), with the particle structure kept intact. It can form uniform "micro-protrusions" on the film surface, with a uniform and stable opening effect. Meanwhile, it does not affect the tensile strength and surface flatness of BOPP films, adapting to the stringent requirements of the biaxial stretching process, and is the preferred opening agent for BOPP films.

Q: How long is the customization cycle for exclusive particle size after small-batch trial?

A: No long waiting is needed. With a modular synthesis and surface modification production line, we can quickly adjust synthesis parameters and particle size specifications, and the regular particle size customization cycle can be shortened to 7-9 days. Meanwhile, we provide performance comparison tests and film blowing verification services before and after customization to help customers quickly complete product adaptation, and can also adjust key parameters such as oil absorption value and specific surface area according to needs.

6. 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, Refined, Special and New Enterprise
• 17 authorized patents from the National Intellectual Property Administration