Kaolin 6000mesh K-90 Super Fine Clay for Paper Coating
Product Overview
K-90 represents an advanced grade of fine calcined kaolin specifically engineered for high-performance paper coating applications. This anhydrous aluminum silicate (Al₂SiO₅) powder undergoes precise thermal treatment and particle size optimization to deliver exceptional optical and printing performance characteristics in paper manufacturing processes.
Manufacturing Process
Controlled calcination at 1000-1100°C for optimal crystal structure development
Multi-stage air classification achieving precise particle size distribution
Advanced surface modification for enhanced fiber bonding
Continuous quality monitoring throughout production
Key Technical Specifications
Whiteness Index: 95-97% (ISO brightness)
Particle Size Distribution:
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D50: 0.8-1.2μm
D90: <3.5μm
+325 Mesh: ≤0.005%
-
Viscosity: 300-500 cP (60% solids)
Specific Surface Area: 15-20 m²/g (BET method)
Refractive Index: 1.62
Chemical Composition
SiO₂: 52-54%
Al₂O₃: 44-46%
Fe₂O₃: ≤0.3%
TiO₂: ≤0.2%
LOI (1000°C): ≤0.5%
Performance Benefits in Paper Manufacturing
Optical Enhancement:
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Increases sheet brightness by 3-5 points
Improves opacity by 15-20%
Enhances surface smoothness (PPS ≤1.0μm)
-
Printing Performance:
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20-30% improvement in ink receptivity
Reduced print mottle and picking
Excellent dot reproduction (150-200 lpi)
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Process Advantages:
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High shear stability in coating color
Excellent water retention properties
Reduced dusting during converting
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Technical Comparison with Conventional Fillers
| Property | K-90 | Standard Kaolin | GCC |
|----------|------|----------------|-----|
| Brightness Improvement | +4.5 | +2.0 | +1.5 |
| Opacity Enhancement | +18% | +10% | +8% |
| Ink Absorption | Excellent | Good | Fair |
| Coating Viscosity | Optimal | High | Low |
| Cost-Performance Ratio | Superior | Good | Moderate |
Mechanism of Action
Plate-like particle structure creates optimal light scattering
Surface chemistry promotes uniform ink film formation
Particle size distribution ensures smooth coating layer
High purity minimizes interference with optical brighteners
Recommended Application Parameters
Coating Formulations: 20-40% by weight
Base Paper Types: LWC, MWC, Art papers
Coating Weight: 8-15 gsm per side
Binder Systems: Compatible with SB latex, starch, PVOH
Sustainability Features
20% reduction in energy consumption versus alternative processes
Enables reduced fiber content without quality compromise
REACH compliant
Biodegradable and non-toxic
Quality Assurance
ISO 9001:2015 certified production
ISO 14001 environmental management
Batch-specific quality certificates
Full traceability from mine to product
Packaging & Logistics
1-ton bulk bags with moisture barrier
25kg multi-wall paper bags
Dedicated paper-grade silo trucks
24-month shelf life in controlled conditions
Technical Support Services
Coating color formulation assistance
Pilot coating trials available
Printability testing protocols
Mill troubleshooting support
K-90 calcined kaolin has become the material of choice for paper manufacturers seeking to optimize both quality and production efficiency. Its unique combination of optical properties, printing performance, and process characteristics makes it particularly valuable in today's competitive paper markets where premium quality and sustainability are key differentiators. Ongoing technical support ensures optimal implementation for each specific application requirement.
Item | Unit | Spacification |
Brightness | R457,% | 93 min |
Particle size | -10 μm | 86 ± 3(-2 μm) |
Oil absorption | g/100g | 66 ± 4 |
Screen residue | 325mesh % | 0.005 |
PH value | / | 6.0-7.5 |
Moisture | kg/L | 0.8 |
Volume density | g/cm³ | 0.35-0.55 |
True density | g/cm³ | 2.65-2.75 |



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Company Name | Beijing TDD E-commerce Co., Ltd | Country/Region | China |
Business Type | Online Store | Company Size | 2000 |
Established | December 18, 2014 | ||
Address | Building No.3, Area 6, No.188, West of South Forth Ring Rd, Beijing, China | ||
Main Products | PVC Resin , PP , PE , Pet , Titanium Dioxide , Pigment , Car Tire | ||
International Commercial Terms(Incoterms): | FOB, CFR, CIF, FCA | ||
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Import & Export Mode: | Have Own Export License |
About Beijing United Information Technology Co., Ltd.
Beijing United Information Technology Co., Ltd. (Stock Code: 603613. SH), founded in 2002 and listed on the Main Board in July 2019, is mainly engaged in industrial e-commerce and industrial Internet platforms. Based on industrial e-commerce and supported by industrial big data and industrial digitalization, the company provides online commodity trading, business information services and digital technology services of industrial products and raw materials for related industries. In terms of business model, it is called "the industrial version of Pinduoduo" and "the industrial version of JD.com".
About Beijing TDD E-commerce Co., Ltd.
Beijing TDD E-commerce Co., Ltd. (shortly named TDD Global) is the core subsidiary of Guolian Corporation (Stock Code: 603613.SH) and the first industrial Internetplatform of Duoduo Series Platforms. The company mainly engages in B28 e-commerce transaction serices of raw material and industrial products, digital supply chain serices, industrial digitalization serices and industrial big data serices, and is committed to promoting the deep integration of traditional industries and new technologies such as the Internet, Internet of Things, big data, intelligent manufacturing and block chain, etc.
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of quot&quality first, customer first and credit-based"Since the establishment of the company and always do our best to satisfy potential needs of our customers.
Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with an irresistible force. |
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Our Advantages:
Rich Experience-over 20 years in industry field
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Our services:
In order to better satisfy our customers worldwide and maintain regular customers. Our company takes raw material&industrial product B2B e-commerce transaction service, digital supply chain service, industry digitization service and industry data service as it′s primary business, focusing on promoting the deep integration between new technology and traditional industry, such as Internet, Internet of things, big data, intelligent manufacturing and blockchain.