1. Product Overview

High Clarity Silica Opening Agent is a high-end special opening raw material developed exclusively for high-transparency plastic films, produced via the sol-gel method and proprietary high-clarity surface modification technology. It strictly complies with industry standards, the EU EN 14639 standard and relevant specifications for Food Contact Materials (FCM). With ultra-high purity silica (≥99.8%) as the core material, it adopts narrow particle size distribution control technology, featuring highly spherical particles and excellent dispersibility. Its refractive index is highly matched with that of transparent resins such as PE, PP and PET (≈1.47), and the particle size can be precisely controlled below the wavelength of visible light, resulting in extremely weak light scattering. While achieving high-efficiency opening, it minimizes the impact on the light transmittance and haze of films, completely solving the industry pain points of difficult opening and transparency loss of high-transparency films, without affecting the mechanical properties, heat seal performance and processability of films. Widely adaptable to the production of opening masterbatches for various high-transparency films including PE, PP, PET, BOPP and CPP, it is an exclusive opening solution for high-end transparent packaging films (food packaging, daily chemical packaging, optical films), far superior to traditional opening agents such as irregular powder or talcum powder with outstanding optical friendliness. (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

Focusing on the dual needs of "opening effect" and "transparency" of high-transparency films, High Clarity Silica Opening Agent relies on the core advantages of narrow particle size distribution and highly matched refractive index to provide an exclusive opening solution for various high-end transparent films, with the following core application values:

1. Ultimate retention of film transparency quality: Adopting narrow particle size distribution control technology (particle size 1.2-4μm, variation coefficient ≤8%) with highly spherical particles, its refractive index is highly matched with that of transparent resins such as PE, PP and PET (≈1.47), resulting in extremely weak light scattering. Adding 0.5% to high-transparency films, the light transmittance decreases by ≤1.0% and the haze increases by ≤0.8%, perfectly retaining the high-transparency texture of films and solving the industry pain point of film turbidity and haze increase caused by traditional opening agents. It is far superior to traditional inorganic opening agents such as talcum powder, suitable for optical grade films, achieving a perfect balance between "opening" and "transparency", keeping packaged goods bright as new for a long time and enhancing shelf appeal.

2. High-efficiency opening, solving transparent film pain points: Adding only 0.2%-0.5% to high-transparency films can form a delicate and uniform "micro-protrusion" isolation layer on the film surface, reducing the contact area between films by more than 75% and the adhesion force from 500mN/25 mm to below 35mN/25 mm. It completely solves the pain points of tight winding, difficult opening and adhesion during high-temperature storage of high-transparency films. The opening effect is long-lasting and stable, without affecting the surface gloss of films, adapting to the use needs of high-end packaging. Meanwhile, it can effectively avoid the formation of vacuum tightness between films, further improving opening convenience.

3. High compatibility, ensuring the core performance of films: Relying on high-clarity exclusive surface modification technology, it has excellent compatibility with various transparent resins (PE, PP, PET, BOPP). After addition, it does not affect the mechanical properties and heat seal performance of films - the tensile strength decreases by ≤2%, and the heat seal strength retention rate is ≥97%, with no precipitation, no crystal points and no yellowing. It performs stably at a processing temperature of ≤220℃, meeting the stringent quality requirements of high-end transparent films. Meanwhile, it can improve the mechanical strength of films, making them tougher and less prone to deformation, achieving a dual effect of "opening + reinforcement".

4. Adaptable to high-end transparent film scenarios: Fully applicable to various high-transparency films including high-transparency PE food packaging films, high-transparency PP daily chemical packaging films, PET optical films, BOPP biaxially oriented transparent films and CPP high-transparency laminating films, especially suitable for the production of thin-gauge (12-20μm) high-transparency films. It can be widely used in high-end packaging fields such as food, daily chemicals, medicine and optics, empowering the improvement of product added value, and is the preferred opening agent for high-end transparent films.

5. Easy processing, adaptable to large-scale production: With excellent dispersibility, it can be uniformly mixed with transparent resins, with the filling amount flexibly adjustable to 10%-28%. No agglomeration and no crystal points 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 of high-end transparent films. Meanwhile, it can reduce the addition amount of amide-based slip agents, lowering the comprehensive cost and improving production efficiency.

4. Factory Strengths

• Customizable capacity for high clarity: Exclusive particle size, specific surface area and surface modification solutions can be customized according to the material (PE/PP/PET, etc.), thickness and transparency requirements of high-transparency films, with precise control of particle size distribution and refractive index matching degree to maximize the balance between opening effect and transparency. We are especially good at optimizing the performance of thin-gauge high-transparency films, and can realize the precise preparation of ultra-fine particle size of 1.2-3μm, adapting to the needs of optical grade films.
• Ultimate transparency performance guarantee: Adopting high-precision particle size screening and purification technology to ensure particle uniformity and dispersibility, with the particle size distribution variation coefficient ≤8% and the batch-to-batch light transmittance impact difference ≤0.3%. It completely avoids problems such as film haze increase and transparency decrease caused by opening agents, ensuring that each batch of products can meet the quality requirements of high-end transparent films.
• Full-process technical support: A professional technical team with rich experience in opening solutions for high-transparency films can provide full-process technical support from parameter selection, masterbatch formula optimization, processing technology debugging to mass production implementation, quickly solving the balance problem between transparency and opening performance in customers' production process. It also provides compliance test reports to ensure production compliance.

5. Frequently Asked Questions

Q: Can this High Clarity Silica Opening Agent be used for 12μm thin-gauge high-transparency PE food packaging films?

A: Yes. This product has optimized the particle size (1.2-2.5μm) and surface modification solution for thin-gauge high-transparency films. Controlling the addition amount at 0.3%-0.4% can achieve an excellent opening effect while controlling the decrease of PE film light transmittance within 1.0% and the haze increase ≤0.8%, with no crystal points and no precipitation. It strictly complies with food contact grade standards, fully meeting the quality requirements of 12μm thin-gauge high-transparency PE food packaging films, and balancing opening convenience and packaging aesthetics.

Q: Will the addition of this opening agent affect the optical performance of high-transparency PET films?

A: No. Its refractive index is highly matched with that of PET resin (≈1.47), and the particle size is precisely controlled below the wavelength of visible light, resulting in extremely weak light scattering. After adding 0.3%-0.5%, there is no obvious change in the light transmittance and haze of PET films, without affecting the optical performance of films. Meanwhile, it can effectively solve the problem of difficult opening of PET films, perfectly adapting to the production needs of PET optical films and high-end packaging films, especially suitable for BOPET films.

Q: Is this opening agent compatible with antistatic agents and slip agents commonly used in high-transparency films?

A: Fully compatible. This product has passed special compatibility tests of additives for high-transparency films and has excellent compatibility with various antistatic agents, slip agents and antioxidants. No chemical reaction, delamination or crystal points occur after mixing. It can also produce a synergistic effect with slip agents to further reduce the friction coefficient of films, simultaneously improving opening performance and surface slip without affecting the transparency and surface gloss of films, facilitating the development of subsequent printing and laminating processes.

Q: How long is the customization cycle if the particle size needs to be adjusted to improve film transparency after small-batch trial?

A: No long waiting is needed. With a specialized modular production line for high clarity, we can quickly adjust particle size parameters and modification solutions, and the customization cycle for high-transparency films can be shortened to 7-10 days. Meanwhile, we provide light transmittance and haze comparison tests and film blowing verification services before and after customization to help customers quickly achieve a perfect balance between "opening" and "transparency", and can also optimize the refractive index matching degree 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 national invention patents