Windora Materials LLC
Your Reliable Northern Industrial Partner
Description
◆ Magnesium hydroxide - Magnesium hydroxide is a high-performance, environmentally friendly flame retardant for the future. Based on halogen-free safety, it provides green protection solutions for high-end materials with its comprehensive advantages of temperature resistance, reliability, and multi-functional capabilities.
1. True halogen-free, safer
It burns without producing toxic fumes, meets environmental standards, and safeguards life and safety.
2. High temperature resistance · More applicable
With a decomposition temperature of >340°C, it is suitable for high-temperature processing environments such as engineering plastics.
3. One dose, multiple functions · More efficient
Integrating flame retardancy, smoke suppression, filling, and insulation, it comprehensively enhances material performance.
4. Process-friendly and more reliable
After surface modification, it exhibits good compatibility with plastics, is easy to process, and maintains stable performance.
MDH
High Purity Natural Magnesium Hydroxide
Description: After processing, it can make polymer materials flame retardant, reduce smoke generation, and prevent the formation of droplets during combustion. The high decomposition temperature （340℃） greatly improves production efficiency.
Specifications
| Project | Unit | Spec | Test method |
| MgO | ％ | ≥60.0 | GB/T5069-2024 |
| CaO | ％ | ＜3.0 | |
| SiO₂ | ％ | ＜8.0 | |
| Fe₂O₃ | ％ | ＜0.5 | |
| (L.O.I) | ％ | ≥30 | * WM/MD-2026.01 |
| Whiteness | / | ≥90.0 | |
| Moisture | ％ | ≤3.0 | |
| D50 | μm | ＞3.5 |
Notes: * WM/MD-2026.01 is Windora Materials LLC. Enterprise Standard.
Mineral (Natural) Magnesium Hydroxide
Natural magnesium hydroxide is produced by physically crushing brucite ore; it is low in cost but has limited purity and contains较多 impurities. It is primarily used in cost‑sensitive applications such as common plastic and rubber fillers, as well as medium- and low‑voltage cables—areas where flame retardancy requirements are not particularly high.
Synthetic Magnesium Hydroxide
Synthetic magnesium hydroxide is produced via chemical precipitation using brine or seawater as raw materials. It boasts high purity, few impurities, and controllable particle morphology. Although its price is relatively high, it offers excellent performance and is widely used in the flame‑retardant layers of high‑end engineering plastics, high‑speed rail cables, and high‑voltage cables for new energy vehicles—particularly in specialized fields with stringent requirements for heavy metal content.
MagFR5CL
Magnesium hydroxide hexagonal flakes
Description: Magnesium hydroxide in hexagonal plate form is a typical layered inorganic material characterized by a unique hexagonal plate‑shaped crystal structure. Its crystal structure imparts excellent physicochemical properties, such as high thermal stability, electrical insulation, and relatively good flame retardancy.
Specifications
| Project | Unit | Spec | Test method |
| Mg(OH)₂ | ％ | ≥99 | GB/T5069-2024 |
| CaO | ％ | ≤0.1 | |
| Insoluble matter in hydrochloric acid | ％ | ≤0.01 | |
| Fe | ％ | ≤0.005 | |
| Cl- | ％ | ≤0.10 | |
| Moisture content | ％ | ≤0.3 | * WM/MD-2026.01 |
| Bulk density | g/ cm3 | 0.25-0.35 | |
| Whiteness | / | ≥96 | |
| Laser particle size D50 | μm | 1.3-1.5 |
Notes: * WM/MD-2026.01 is Windora Materials LLC. Enterprise Standard.
Storage and Handling
Storage: Store in a dry environment and reseal the bag immediately after opening.
Shelf life: From the date of shipment, keep the packaging intact; the shelf life is 12 months.
Packaging: 25 kg three-layer paper bags (paper + PP + paper).
Safety: Low hazard, fire‑ and explosion‑proof, non‑toxic.
Transportation: We offer a variety of compliant transportation options.
MDH
Magnesium hydroxide is a high-performance, environmentally friendly flame retardant for the future. Based on halogen-free safety, it provides green protection solutions for high-end materials with its comprehensive advantages of temperature resistance, reliability, and multi-functional capabilities.
Keywords:MDH
Category:
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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