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
Fumed Silica for Fire-Resistant Glass – Technical Data Sheet Manufacturer: ANDEHU NEW MATERIALS (SHANDONG) CO., LTD
1. Product Description
Andehu Fumed SIlica / Nano SIlica for fire-resistant glass is an aqueous dispersion of high-purity amorphous nano-sized silica particles, designed as the core interlayer material for cast-in-place Class A insulating fire glass. The product is manufactured via controlled silicate hydrolysis and surface modification, delivering stable colloidal properties, consistent particle size distribution and reliable fire insulation performance. It is formulated to replace traditional sodium silicate systems, reducing efflorescence and improving long-term optical stability.
2. Key Characteristics
1.Chemical Purity: SiO₂ (dry basis) ≥99.8%; Na₂O ≤0.3%; heavy metals below detection limits; no organic additives. Non-toxic and non-combustible, compliant with inorganic fire protection material requirements.
2.Particle Size Control: Monodisperse spherical particles with nominal diameters of 60nm, 80nm, 100nm and 120nm available. Narrow particle size distribution (PDI <0.15) ensures uniform curing and consistent optical properties.
3.Optical Properties: Refractive index 1.38–1.40 at 25℃; visible light transmittance ≥88% for 10mm path length. Cured gel layer exhibits refractive index matching to soda-lime glass, minimizing light scattering.
4.Colloidal Stability: Stabilized by surface charge in alkaline aqueous medium. No gelation, sedimentation or phase separation after 12 months of storage under recommended conditions.
3. Fire Reaction Mechanism
Upon exposure to fire, the material undergoes three sequential thermal stages:
1.Dehydration stage (25–200℃): Evaporation of free and bound water, endothermic process.
2.Polycondensation stage (200–600℃): Formation of siloxane bonds, development of three-dimensional network structure, volume shrinkage and densification.
3.Ceramization stage (>800℃): Sintering of silica nanoparticles into a continuous vitreous ceramic layer with low thermal conductivity and high structural integrity.
4. Recommended Processing Conditions
Pouring process:
Mixing temperature: 20–25℃
Degassing: vacuum ≥ -0.09MPa, 30–60min
Curing profile: 60℃ / 4h → 80℃ / 6h → 100℃ / 4h
Interlayer thickness: 5–20mm
Lamination process:
Thickener addition: 0.5–2.0% by weight
Coating thickness: 2–8mm wet film
Lamination pressure: 0.3–0.8MPa
5. Typical Properties
表格
Property Specification Test Method
SiO₂ Content 30–55 wt% Gravimetric (105℃/2h + 1000℃/1h)
Mean Particle Size 60–120 nm Dynamic Light Scattering
pH @ 25℃ 9.0–10.5 Glass electrode pH meter
Viscosity @ 25℃ 10–50 mPa·s Rotational viscometer, 60rpm
Light Transmittance ≥88% Spectrophotometer, 550nm, 10mm cell
Na₂O Content ≤0.3 wt% Flame photometry
Shelf Life ≥12 months Sealed storage 5–35℃
6. Applications & Grade Selection
表格
Fire Rating Recommended Grade Typical Use
0.5–1.0 h 30–40% solids, 60–80nm Interior fire doors, windows
1.5–2.0 h 40–50% solids, 80–100nm Fire partitions, compartment walls
2.5–3.0 h 50–55% solids, 100–120nm High-rise curtain walls, escape routes
Packaging & Handling
Available in 25kg, 200kg HDPE drums and 1000kg IBC totes. Store in original sealed containers at 5–35℃, protected from direct sun and frost. Address: Huaiyin District, Jinan City, Shandong Province, China
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.
