Sodium Tripolyphosphate for Ceramics and Building Materials
Technical Guide for Ceramic and Building Grade Sodium Tripolyphosphate (STPP-CB300)
Core Product Positioning
STPP-CB300 is a modified sodium tripolyphosphate developed for ceramic manufacturing and building materials. It achieves directional growth of β-type crystals (accounting for ≥88%) through dynamic gradient calcination technology and simultaneously solves the problems of improving the strength of ceramic green bodies and controlling the rheology of building materials. It has been certified by the National Building Materials Testing Center CMA (report number CMT-2023-0873), and the precipitation of heavy metals such as lead and cadmium is only 60% of the EU EN 71-3:2019 limit.
Technical parameters (industry comparison)
| Key Indicators | Ordinary STPP | STPP-CB300 | Test Standard |
|---|---|---|---|
| Main Content (Na₅P₃O₁₀) | 93.5 – 94.8% | 95.8 ± 0.2% | HG/T 2764-2020 |
| 325 Mesh Pass Rate | 98.2% | 99.88% | GB/T 19077-2016 |
| Calcium Chelating Power (mg/g) | 280 – 300 | 318 | ASTM D1126 |
| Thermal Stability Threshold | 250℃ | 580℃ | TG-DSC analysis |
| Dissolution Rate (25℃) | 45 – 60 seconds | 28 seconds | GB/T 6371-2008 |
Efficiency enhancement scheme for the ceramic industry
Body reinforcement system
Add 0.3-0.5% to the clay formula:
· Improved wet body strength: flexural strength reaches 2.8MPa (control group 1.97MPa), reducing molding breakage rate by 62%
· Shortened drying cycle: drying time of 18% to 8% moisture content is compressed to 4.2 hours (original process 5.8 hours)
· Reduced firing energy consumption: sintering temperature of 1250℃ can be lowered to 1200℃ (thermogravimetric analysis verification)
Glaze stabilization technology
When combined with zirconium silicate:
· Suspension stability is extended to 72 hours (conventional products fail in 48 hours)
· Glaze gloss reaches 95GU (international standard ISO 2813 Class 1)
· Pinhole defect elimination rate> 93% (production data of a well-known tile manufacturer in Foshan)
Modified application of building materials
Concrete engineering
Add 0.08-0.12% by weight of cement:
·Slump loss rate 2h ≤5% (GB/T 50080 requires ≤10%)
·Chloride ion permeability coefficient reduced to 1.8×10⁻¹²m²/s (improves durability of reinforced concrete)
·28-day compressive strength increased by 12.5MPa (actual data of C30 concrete)
Gypsum products
Add 0.2% to α gypsum powder:
·Dry flexural strength 8.6N/mm² (exceeds EN 520 standard by 56%)
·Water absorption controlled at 28% (conventional products above 35%)
·Demolding time shortened to 32 minutes (base value 45 minutes)
Five core technical advantages
1. Precise particle size control
Adopt air vortex crushing technology to achieve a narrow distribution of D50=12.5μm (Span value <1.1), ensuring a 60% increase in dispersion uniformity in ceramic slurry
2. High temperature tolerance
β-type crystals remain stable within 580℃ (TG curve verification), avoiding the failure of traditional STPP in the high-temperature section of the kiln
3. Double-effect dispersion mechanism
Electrostatic repulsion: Zeta potential -45mV, prevent particle agglomeration
Iron chelation: complex Ca²+/Mg²+ plasma, block crystal formation
4. Intelligent construction adaptation
The pre-activated particle design can be directly put into the mixer, the dissolution speed is 3 times faster than conventional products, and it is suitable for automated batching systems
5. Environmental compliance guarantee
Passed REACH Regulation SVHC 235 tests (report number SHCIC-2023-1122)
28-day biodegradability rate 82% (OECD 301F standard)
Quality traceability system
· Raw material level traceability: electronic grade yellow phosphorus (purity 99.95%) + food grade soda ash (GB 1886.4-2020)
· Production level monitoring: DCS system records calcination temperature curve (±3℃ fluctuation)
· Finished product level verification: XRD crystal configuration map is provided for each batch
Empirical case library
· A sanitary ware company: glaze cost was reduced by 18%, and the rate of superior products increased to 99.2%
· Key project case: Hangzhou Asian Games stadium concrete project (impermeability level reaches P12)
· Overseas cooperation case: Vietnam Vinacera Group’s annual strategic supplier
1. Analysis of technical characteristics
Q1: What is the key role of β-type crystals accounting for ≥88% in practical applications?
A: β-type crystals have a three-dimensional network structure (SEM images can be provided), which brings two core advantages:
Thermal stability: Maintaining structural integrity during the ceramic sintering stage (300-600℃), avoiding the deactivation of traditional STPP at 480℃
Dispersion efficiency: The ion exchange rate is increased by 60% compared with α-type crystals, and the dispersion time in gypsum slurry is shortened to 8 minutes (conventional products are 15 minutes)
Q2: What is the significance of the parameter design of particle size D50=12.5μm?
A: This specification precisely matches the industry needs:
Ceramic glaze: less than 1/10 of the glaze layer thickness (usually 150-200μm) to avoid particle exposure
Concrete mixing: form a grading effect with cement particles (D50≈20μm) to improve density
Test basis: Malvern laser particle size analyzer (GB/T 19077-2016) for each batch test
II. Application plan guidance
Q3: How can the amount of ceramic body addition be accurately controlled?
A: Recommended three-order control method:
Basic amount: 0.3% of the weight of porcelain clay (calculated by the “STPP Master” applet)
Adjustment amount: Dynamically increase or decrease ±0.05% according to the thixotropy of the slurry
Verification index: Wet body flexural strength must be ≥2.5MPa (addition is required if it is lower than this value)
Q4: How do we avoid conflict with polycarboxylic acid water reducers in concrete applications?
A: This product solves the compatibility problem through charge neutralization technology:
Recommended order of addition: first add STPP-CB300 and stir for 90 seconds, then add water reducer
Measured data: slump retention rate increased from 72% to 95% (C40 concrete test)
Three, quality verification system
Q5: How do you confirm the product received is a β-type crystal?
A: Four-fold verification channel:
Rapid detection: matching color development kit (characteristic blue-purple in 5 minutes)
Scan code traceability: The QR code on the package can view the XRD spectrum of the current batch (matching JCPDS 00-012-0493 standard)
Third-party testing: Support SGS for DSC differential scanning (β-type characteristic peak 580℃)
Process verification: Open production data cloud query (authorization required)
Q6: How can product quality be ensured during transportation in high-temperature seasons?
A: Triple protection solution:
Packaging upgrade: Aluminum-plated vacuum bag + desiccant (free of charge)
Logistics monitoring: GPS temperature and humidity tracking (＞40℃ automatic alarm)
Arrival inspection: Free portable moisture meter (accuracy ±0.2%)
IV. Safety and environmental protection
Q7: Does the product comply with EU building materials contact safety standards?
A: Passed three major international certifications:
REACH: SVHC 235 items were not detected (report number SHCIC-2023-1122)
EN 71-3: The amount of heavy metal dissolution is only 40-60% of the limit
ISO 14064: Carbon footprint 2.8kg CO2e/kg (industry average 3.5kg)
Q8: Will phosphorus components affect the durability of concrete?
A: Positive effect achieved through calcium phosphate mineralization technology:
Carbonation depth reduced to 1.2mm in 28 days (1.8mm in the benchmark group)
Freeze-thaw cycle number ≥ 300 times (GB/T 50082 standard)
Why Choose Us
At GOWAY INTERNATIONAL MATERIAL CO., LTD, we stand out in the sodium tripolyphosphate (STPP) industry with over 20 years of expertise, a reputation built on reliability, and a dedication to delivering industrial-grade products that meet the highest standards. Our factory, located in Fuquan, Guizhou, boasts a 30,000-ton annual production capacity, making us one of the most trusted suppliers in the market.
Unmatched Expertise
With more than two decades of experience, we have mastered every aspect of the Sodium Tripolyphosphate manufacturing process. Our team of experts ensures that each batch of STPP meets precise specifications, providing you with a product that enhances the performance of your products, from detergents to water treatment solutions.
Innovative Technology
We pride ourselves on being the first fully automatic manufacturer of STPP in Guizhou. This cutting-edge technology not only increases our production efficiency but also guarantees the consistent quality and purity of our products, making us an industry leader.
Direct-from-Factory Sales Model
By operating under a direct-from-factory sales model, we can offer highly competitive prices without compromising quality. This structure enables us to provide cost-effective solutions while building strong, lasting relationships with our customers.
Commitment to Quality
As a National High-Tech Enterprise, we adhere to the strictest quality control measures to ensure that every batch of STPP is of the highest standard. Our products are essential in various industries, including detergents, water treatment, and chemical manufacturing, and our unwavering focus on quality makes us a trusted partner for businesses worldwide.
Frequently Asked Question
We offer a variety of shipping methods depending on your location and urgency. This includes sea freight, air freight, and land transport. For smaller orders, we may also offer express delivery services like DHL, FedEx, or UPS to ensure timely arrival.
The delivery time depends on the shipping method and your location. For sea freight, the usual delivery time ranges from 20 to 40 days, while air freight generally takes 5 to 7 days. Once we receive your order and confirm the shipping details, we will provide you with a more precise delivery estimate.
We have extensive experience in handling international shipments. We take care of all the necessary paperwork, including customs declarations and import/export documentation. We also offer assistance with customs clearance to ensure smooth and efficient delivery.
Yes, once your order is shipped, we will provide you with a tracking number and the relevant tracking details. You can monitor the progress of your shipment directly through the carrier’s website or by contacting our customer service team for assistance.
In the event of a delay, we will promptly inform you and work closely with the shipping provider to resolve the issue. We are committed to delivering your order on time and will do our best to ensure that any issues are handled quickly and efficiently.
Depending on the delivery location and shipping method, there may be additional fees such as customs duties, taxes, or handling fees. These fees are generally the responsibility of the buyer, but we will inform you of any such costs before shipping.
