Windora Materials LLC
Your Reliable Northern Industrial Partner
Description
✦Calcined kaolin — High-quality functional mineral materials, centered on thermally activated modification, leverage their high whiteness, porous structure, and outstanding chemical stability to deliver high-performance, cost-effective functional filler solutions for polymer materials, coatings, ceramics, and other fields, making them the ideal choice for enhancing product quality and processing performance.
1. Heat Activation · More Sophisticated
Natural kaolin is activated through a precisely controlled calcination process (600–1050°C), which removes hydroxyl groups and transforms the material into a highly active, porous metakaolinite phase, thereby significantly enhancing its insulating properties, whiteness, and chemical inertness.
2. Functional Integration—Greater Efficiency
Combining the dual roles of high-quality white pigment and functional filler, this product can partially replace expensive pigments such as titanium dioxide, delivering excellent opacity, high whiteness, and stable oil absorption while enhancing surface gloss, thus providing a more cost-effective modification solution.
3. Inert Stability—More Reliable
It exhibits exceptionally stable chemical properties, with outstanding resistance to acids, alkalis, corrosion, and weathering. Even under high-temperature or harsh environmental conditions, it maintains consistent performance and does not participate in chemical reactions within the system, thereby providing long-term, reliable performance assurance for products such as cables and coatings.
4. White Low-Carbon · Greater Value-Added
Its high whiteness imparts excellent color-matching performance to finished products. As a natural mineral material, it requires relatively low energy consumption during processing, aligning with green, environmentally friendly, and sustainable development principles, making it an eco-friendly functional filler.
CK
Calcined kaolin
Description: High whiteness and brightness; low oil absorption; chemical inertness; enhanced hardness and wear resistance; thermal stability; electrical insulation; environmentally friendly and non-toxic. Primarily used in high-value-added applications such as coatings, rubber, plastics, cables, ceramics, and catalyst supports.
Specifications and Parameters
| Test Items | Spec | Test method | |
| SiO₂ (%) | ≥45 | GB/T 14563 | |
| Na₂O+K₂O (%) | ≤1.0 | ||
| Al₂O₃ (%) | ≥35 | ||
| Whiteness | ≥70 | * WM/CK-2026.01 | |
| Appearance | white | ||
| Heating Loss (%) (105°C, 2 hours) |
≤1.0 | ||
| Residue on 200-mesh sieve (%) | ≤0.6 | ||
| Activity index | 7 days (%) | ≥90 | |
| 28 days (%) | ≥105 | ||
Note: * WM/MD-2025.01 is the corporate standard of Wando New Materials Technology Co., Ltd.
Storage and Handling
Storage: Store in a dry environment and reseal the bag immediately after opening.
Shelf Life: When the packaging remains intact from the date of shipment, the shelf life is 12 months.
Packaging: 25 kg three-ply paper bags (paper + PP + paper).
Safety: Low hazard, fire- and explosion-proof, non-toxic.
Transportation: Offering a variety of compliant transportation options.
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Calcined kaolin
High-quality functional mineral materials, centered on thermally activated modification, leverage their high whiteness, porous structure, and outstanding chemical stability to deliver high-performance, cost-effective functional filler solutions for polymer materials, coatings, ceramics, and other applications—making them the ideal choice for enhancing product quality and processing performance.
Keywords:Calcined kaolin
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Company Profile
Windora Materials LLC is a modern mining enterprise located in Kuandian, Liaoning, China, specializing in the mining, advanced processing, and sales of non‑metallic minerals such as brucite and wollastonite. The company’s main products include magnesium hydroxide flame retardant (MDH), wollastonite (WOL), talc (TAL), and aluminum hydroxide (ATH) series, which are widely used in PE/PP/PVC, cable compounds, building plastics, new‑energy cables (photovoltaic/wind power/energy storage), and environmental protection applications.
FAQs
What kind of company is your company?
Windora Materials LLC is a modern mining enterprise located in Kuandian, Liaoning, China, specializing in the mining, advanced processing, and sales of non‑metallic minerals such as brucite and wollastonite. The company’s main products include magnesium hydroxide flame retardant (MDH), wollastonite (WOL), talc (TAL), and aluminum hydroxide (ATH) series, which are widely used in PE/PP/PVC, cable compounds, architectural plastics, new‑energy cables (photovoltaic/wind power/energy storage), and environmental protection applications.
What is your company’s production capacity and quality system like?
The company has established a specialized brucite and wollastonite powder processing facility that went into operation in 2012, with an annual processing capacity of 120,000 tons. The powder processing employs a dual-system configuration featuring both air jet mills and ring roller mills. These two systems can operate independently to meet diverse order requirements, or they can work in coordination to create a complete processing flow—from coarse crushing to ultrafine grinding—jointly ensuring stable production capacity and controllable product quality.
Can I visit your factory?
We warmly welcome prospective clients and partners to visit and conduct site inspections. Please make a reservation in advance via the “Contact Us” form on our website, and we will arrange professional reception services for you.
What is the minimum order quantity (MOQ)?
We offer flexible collaboration models for clients of all sizes. For standard products, we have reasonable MOQs. For new customers or sample orders, we also provide competitive MOQ policies. Please consult our sales representatives for details.
What are the payment methods and delivery times?
We accept multiple payment methods, including T/T (telegraphic transfer), Alipay, and WeChat Pay. The delivery time depends on the order quantity and product type; typically, production is completed and shipment arranged within 30 days after receipt of the deposit.
Do you provide samples? How are samples charged?
We encourage customers to test samples before placing bulk orders. Samples are subject to a fee, but if you place a bulk order afterward, the sample cost can be deducted from your invoice. Please contact us for specific sample information.
How are your goods transported?
We maintain long-term partnerships with several internationally renowned logistics companies for both ocean and air freight forwarding. We can provide the most cost‑effective and fastest shipping solutions based on your specific needs, and assist you in handling customs clearance documents.
What should you do if there are quality issues with a product?
We are fully confident in the quality of our products and offer comprehensive quality assurance. In the rare event that you suspect a quality issue with the product you received, please stop using it immediately and contact our customer service or sales representative as soon as possible. We will then provide an appropriate solution based on the specific circumstances.
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