Essential details
Quantity(pieces):10
MOQ:1T
Lead time:15Days
Shipping:sea transportation
Specification Number:ZLLSIL-MF200 Silica Dispersion (Fumed SIlica / Nano SIlica for Fire-Resistant Glass)
Package Description:Woven bag ton bag
Product Introduction
Curtain Wall Grade Nano Silica for Fire-Rated Glazing Manufacturer: ANDEHU NEW MATERIALS (SHANDONG) CO., LTD
1. Product Overview
Engineered specifically for exterior fire-rated glass curtain wall systems, Andehu curtain wall grade Fumed SIlica / Nano SIlica is a high-performance interlayer material built on our standard product platform with upgraded weathering stability, structural bond strength and long-term optical reliability. It meets the stringent demands of high-rise and super high-rise building facades, fully complies with GB/T 15763.1 for Class A insulating fire-resistant glass, and delivers wind pressure resistance, UV durability and thermal cycling performance required for curtain wall engineering. Optimized for curtain wall fire glass fabrication, our R&D team has refined particle size distribution and surface modification to eliminate yellowing, delamination and cracking common with ordinary Fumed SIlica / Nano SIlica after long-term outdoor exposure, providing safe, durable fire protection for modern building facades.
2. Exclusive Curtain Wall Grade Performance
Superior Weathering & Aging Resistance: Surface densification modification greatly improves UV resistance, water resistance and acid resistance of the cured gel. After 1000 hours QUV-B accelerated aging, transmittance loss ≤2%, with no yellowing, chalking or peeling. Designed for 25+ year outdoor service life, ideal for coastal and high-UV regions.
High-Strength Structural Bonding: Bond strength between cured gel and glass substrate ≥2.5MPa, significantly above standard grades. Silanol groups form chemical bonds with glass surface and match glass thermal expansion coefficient. No stress cracking under -40℃ to 80℃ thermal cycling, ensuring curtain wall structural safety under extreme temperature swings.
Large-Panel Pouring Compatibility: Optimized rheology and curing shrinkage ≤3% for large-format curtain wall glass. Enables bubble-free, flow-mark-free uniform pouring for panels over 2m×3m, improving production yield and supporting unitized curtain wall prefabrication.
Dual Fire Integrity & Insulation: Beyond thermal insulation requirements, the product delivers enhanced fire integrity. In standard fire tests, unexposed surface temperature rise is uniform with no local hot spots. The gel layer maintains structure at high temperature without collapse or delamination, preventing flame and smoke spread and supporting curtain wall fire compartment design.
3. Curtain Wall System Fire Solutions
Unitized Curtain Wall Fire Glass: Adapted to factory prefabrication of unitized systems, with adjustable curing speed to match assembly line takt time. Finished panels have high dimensional accuracy for direct on-site hoisting, accelerating installation.
Framed Curtain Wall Fire Glass: Suitable for on-site glazing. The colloid exhibits good thixotropy and does not sag during vertical pouring. Cured material is compatible with frame sealing systems, causing no corrosion or swelling to aluminum profiles and sealants.
Double Skin Facade Fire Barriers: Used as intermediate fire separation layers in double skin facades. Lightweight and transparent, it preserves ventilation and daylighting while blocking vertical fire spread within curtain wall cavities, complying with high-rise fire compartment codes.
4. Production Process Control Points
Curtain wall grade products require stricter production environment and process control:
1.Substrate Pretreatment: Clean glass with pure water and plasma treat surface to ensure cleanliness and bond reliability.
2.Constant-Temperature Blending: Prepare formulation at 23±2℃, low-shear mixing with vacuum degassing to avoid air entrainment.
3.Cleanroom Pouring: Automated pouring equipment in Class 10,000 cleanroom to control flow rate and level for uniform thickness.
4.Three-Stage Curing: Step temperature curing to relieve internal stress and ensure flatness and optical quality of large panels.
5.Full Inspection: 100% inspection of appearance, transmittance, thickness deviation and stress before delivery.
5. Technical Specifications
表格
Item Curtain Wall Grade Index Test Standard
Silica Content 45%–55% Gravimetric method
Average Particle Size 90–110nm Dynamic light scattering
pH Value (25℃) 9.5–10.2 pH meter
Viscosity (25℃) 20–40mPa·s Rotational viscometer
Visible Light Transmittance ≥90% GB/T 2680
Bonding Strength ≥2.5MPa Tensile bond test
Fire Resistance Rating 1.0–3.0h GB/T 15763.1
UV Aging Resistance Transmittance loss ≤2% QUV-B 1000h
Thermal Cycling No crack, no delamination -40℃~80℃, 50 cycles
Curing Shrinkage ≤3% Volume change rate test
6. Engineering Advantages
Complies with national building fire design codes, usable as Class A insulating fire separation components.
High optical clarity preserves facade aesthetics and maintains curtain wall design consistency.
Fully inorganic, Class A combustion rating: smoke-free, non-flammable, no toxic gas release.
Compatible with major curtain wall sealants and structural adhesives, reducing integration risk.
Tight batch-to-batch consistency supports large-scale supply and tight project schedules.
1. Q: What is curtain wall grade Fumed SIlica / Nano SIlica ?
A: An upgraded version with enhanced weather resistance for exterior curtain walls.
2. Q: Can standard grade be used for exterior curtain walls?
A: Not recommended; curtain wall grade has better UV and weather resistance.
3. Q: What is its service life outdoors?
A: Designed for 25+ years under normal conditions.
4. Q: Does it resist UV aging?
A: Yes, ≤2% transmittance loss after 1000h QUV-B test.
5. Q: Does it resist thermal cycling?
A: Withstands -40℃ to 80℃ thermal cycling for 50 cycles without cracking.
6. Q: Is it suitable for coastal areas?
A: Yes, improved water and salt spray resistance.
7. Q: Does it cause efflorescence on edges?
A: Low-sodium formula effectively suppresses alkali efflorescence.
8. Q: Does it yellow after long-term outdoor use?
A: No, anti-yellowing formula maintains clarity.
9. Q: Is it compatible with aluminum frames?
A: Yes, no corrosion or swelling to aluminum profiles.
10. Q: Is it compatible with silicone sealants?
A: Yes, good compatibility with common curtain wall sealants.
11. Q: Which curtain wall systems does it fit?
A: Unitized curtain walls, framed curtain walls and double skin facades.
12. Q: Can it be used for unitized curtain wall prefabrication?
A: Yes, curing speed matches factory assembly line rhythm.
13. Q: Does it meet wind pressure requirements?
A: High bonding strength ensures curtain wall structural safety.
14. Q: What fire rating is available for curtain walls?
A: 1.0h to 3.0h Class A insulating rating.
15. Q: Does it affect facade aesthetics?
A: High transparency preserves original facade design.
16. Q: Is it suitable for super high-rise buildings?
A: Yes, it meets strict fire and structural requirements.
17. Q: Can it be used for double skin facade fire barriers?
A: Yes, it blocks vertical fire spread in the cavity.
18. Q: Does it crack in cold winters?
A: Matched thermal expansion with glass prevents stress cracking.
19. Q: Is on-site pouring possible?
A: Framed curtain wall grade supports on-site gluing.
20. Q: Does it comply with building fire codes?
A: Yes, meets GB/T 15763.1 and relevant international standards.
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### Group 6: Quality & Stability FAQs
1. Q: How do you ensure consistent quality?
A: Full-process quality control from raw material to finished product.
2. Q: Is each batch tested?
A: Yes, full inspection before delivery with COA provided.
3. Q: What quality system is certified?
A: ISO 9001 quality management system.
4. Q: Will it gel during storage?
A: No, under recommended storage conditions it stays stable for 12+ months.
5. Q: Will it delaminate or precipitate?
A: Charge stabilization technology prevents sedimentation and delamination.
6. Q: Does pH change during storage?
A: It remains stable within the specified range.
7. Q: What happens if it freezes?
A: Freezing may damage colloidal structure; avoid freezing.
8. Q: Does sunlight affect it?
A: Long-term direct sunlight is not recommended; store in shade.
9. Q: Will it grow mold?
A: Fully inorganic formula, no mold growth.
10. Q: Is there batch-to-batch viscosity variation?
A: Variation is strictly controlled within a narrow range.
11. Q: Do you provide third-party test reports?
A: Yes, SGS/BV/TUV test reports are available.
12. Q: Can customers arrange factory inspection?
A: Yes, factory audits are welcome by appointment.
13. Q: Does it meet REACH/RoHS?
A: Yes, compliant with REACH and RoHS standards.
14. Q: Is there a return policy for quality issues?
A: Quality issues are handled per formal quality agreement.
15. Q: How to judge if it has expired?
A: Obvious gelation, delamination or sharp viscosity rise means expiration.
16. Q: Does purity affect optical performance?
A: Yes, higher purity means better clarity and anti-yellowing.
17. Q: Why is narrow particle size distribution important?
A: It ensures uniform curing and consistent optical quality.
18. Q: Is the product traceable?
A: Yes, each batch has a unique number for full traceability.
19. Q: Do you offer stability test data?
A: Yes, accelerated aging and long-term storage data are available.
20. Q: Is the formula fixed?
A: Standard grades are fixed; custom grades can be adjusted.
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### Group 7: Storage, Packaging & Logistics FAQs
1. Q: What packaging options are available?
A: 25kg drum, 200kg drum, 1000kg IBC tote.
2. Q: What packaging material is used?
A: Food-grade PE / HDPE material.
3. Q: What is the storage temperature?
A: 5–35℃, cool and dry place.
4. Q: Should it be stored sealed?
A: Yes, always seal tightly after use to prevent water evaporation.
5. Q: Can it be stored outdoors?
A: Not recommended; avoid direct sun and freezing.
6. Q: What is the shelf life?
A: Minimum 12 months in original sealed packaging.
7. Q: Can shelf life be extended?
A: Proper storage helps; opened drums should be used soon.
8. Q: Is it dangerous goods?
A: No, it is general cargo, non-hazardous.
9. Q: Can it be shipped by sea?
A: Yes, moisture-proof packaging is standard for sea freight.
10. Q: Is UN packaging available?
A: Yes, UN-certified IBC totes for export.
11. Q: What is the loading quantity per 20ft container?
A: Depends on packaging; details available on request.
12. Q: Can it be shipped in winter?
A: Yes, but avoid freezing during transport.
13. Q: What if it leaks during transport?
A: Rinse with water; it is non-corrosive.
14. Q: Is palletized packaging available?
A: Yes, standard palletized for forklift handling.
15. Q: Can packaging be customized?
A: Yes, custom labeling and package size are supported.
16. Q: How to handle empty drums?
A: Rinse with water before disposal or recycling.
17. Q: Is vacuum packaging needed?
A: No, sealed drum packaging is sufficient.
18. Q: Does it need nitrogen filling?
A: Not required for standard grades.
19. Q: What is the lead time?
A: 7–15 days for standard grades.
20. Q: Can you arrange door-to-door delivery?
A: Yes, multiple trade terms available.
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### Group 8: Selection & Procurement FAQs
1. Q: Which grade should I choose for 1h fire rating?
A: 30–40% solid content, small-medium particle size.
2. Q: Which grade for 2h fire rating?
A: 40–50% solid content, medium particle size.
3. Q: Which grade for 3h fire rating?
A: 50–55% solid content, large particle size.
4. Q: What grade for exterior curtain walls?
A: Special curtain wall grade with weather resistance.
5. Q: What grade for interior fire doors?
A: Standard 30–40% grade is sufficient and cost-effective.
6. Q: Can I get free samples?
A: Yes, free samples are available for testing.
7. Q: What is the minimum order quantity?
A: 1 ton for standard grades; custom grades negotiable.
8. Q: Can you customize particle size?
A: Yes, within 60–120nm range.
9. Q: Can you customize solid content?
A: Yes, 30–55% customizable.
10. Q: Do you offer OEM/ODM?
A: Yes, OEM and custom formulation services are supported.
11. Q: What documents are provided?
A: COA, MSDS, TDS, certificate of origin, etc.
12. Q: What trade terms do you accept?
A: EXW, FOB Qingdao, CIF, CIP, etc.
13. Q: What payment terms are available?
A: T/T, L/C and other negotiable terms.
14. Q: Do you have stock available?
A: Standard grades are kept in regular stock.
15. Q: Can you supply large projects continuously?
A: Yes, large production capacity supports bulk stable supply.
16. Q: Do you provide technical support?
A: Yes, formulation tuning and on-site support are available.
17. Q: How to request a quote?
A: Contact us with required grade, quantity and destination.
18. Q: Can I visit your factory?
A: Welcome, please make an appointment in advance.
19. Q: Do you have local distributors?
A: Contact us for the latest distributor network.
20. Q: Can we sign an annual supply agreement?
A: Yes, framework agreements for long-term cooperation are welcome.
