Quanzhou Gufaith Houseware Co.,Ltd
                                                                                                           
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Melamine Cyanurate Powder Used for Pure PA6, PA66

Price Negotiable
Price: Negotiable
MOQ: 20 tons
Delivery Time: 5-10 work days
Brand: Gufaith
Product Description

Melamine Cyanurate Powder Used for Pure PA6, PA66

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Specification:

Item Standard
Appearance   white powder
Melamine Cyanurat  %(w/w) ≥99.5%
Excess Cyanuric acid %(w/w) 0.2%
Excess Melamine   %(w/w) 0.3%
Water content      %(w/w) 0.2%
PH Value 5-7
Density g/m3, 25ºC 1.35-1.85
Decomposition ºC ≥300
Particle size(D50) 3um
Particle size(D97) 8um

 
How Pure Melamine Powder is Produced: A Step-by-Step Guide‌
The industrial production of pure melamine powder involves advanced chemical synthesis and refining techniques. Below is a simplified breakdown of the process:

‌1. Raw Material Preparation‌
‌Primary Feedstock‌: Urea (CAS 57-13-6) is the primary raw material.
‌Pre-Treatment‌: Urea is purified to remove contaminants (e.g., biuret, ammonia) to ensure high-purity input for synthesis.
‌2. Synthesis Reaction‌
Melamine is synthesized through one of two main methods:

‌a. High-Pressure Non-Catalytic Process‌

‌Reaction‌: Urea is decomposed under high temperature (380–450°C) and pressure (8–10 MPa) in a molten state.
‌Chemical Equation‌:
6 , text{NH}_2text{CONH}_2 , (text{urea}) rightarrow text{C}_3text{H}_6text{N}_6 , (text{melamine}) + 6 , text{NH}_3 + 3 , text{CO}_26NH
2
CONH
2
(urea)→C
3
H
6
N
6
(melamine)+6NH
3
+3CO
2

‌Catalyst-Free‌: This method avoids catalysts, simplifying post-reaction purification.
‌b. Low-Pressure Catalytic Process‌

‌Catalyst‌: Aluminum oxide (Al₂O₃) or silica gel is used.
‌Conditions‌: Lower temperature (350–400°C) and atmospheric pressure.
‌3. Gas-Phase Purification‌
The reaction produces a gas mixture (melamine vapor, ammonia, CO₂).
‌Cooling & Crystallization‌: Melamine vapor is rapidly cooled to form solid crystals.
‌4. Washing and Refining‌
‌Centrifugation‌: Crude melamine is separated from residual gases and unreacted urea.
‌Acid Washing‌: Diluted sulfuric acid or water removes impurities (e.g., cyanuric acid, ammeline).
‌Recrystallization‌: Further purification ensures ≥99% purity.
‌5. Drying and Milling‌
‌Drying‌: Moisture is removed using rotary dryers or fluidized bed dryers.
‌Particle Size Control‌: The dried product is milled into fine, uniform powder (typical particle size: 100–500 µm).
‌6. Quality Control‌
‌Purity Testing‌: HPLC (High-Performance Liquid Chromatography) or GC (Gas Chromatography) verifies ≥99% purity.
‌Physical Properties‌: Color (pure white), solubility, and thermal stability are tested.
‌7. Packaging and Storage‌
‌Moisture-Proof Packaging‌: Sealed in multi-layer polyethylene or aluminum bags.
‌Storage Conditions‌: Kept in dry, cool environments away from UV light.
‌Key Environmental and Safety Measures‌
‌Ammonia Recovery‌: NH₃ byproduct is captured and reused in urea production.
‌Wastewater Treatment‌: Acidic washwater is neutralized before disposal.
‌Dust Control‌: Closed systems prevent airborne melamine particles.
‌Global Production Standards‌
Leading manufacturers (e.g., in China, Europe) adhere to ISO 9001 and REACH regulations.
Industrial-grade melamine typically meets ASTM D 3638 specifications.
This streamlined process ensures the production of high-purity melamine powder for applications in plastics, coatings, flame retardants, and adhesives. Let me know if you need deeper technical details!

FAQ


Q1:Are you a trading company or a manufacturer?
A1: Yes, we are a manufacturer with designing, manufacturing, marketing and exporting.


Q2: Does your company get any quality certificates?
A2: Yes, we have got the certificates of SGS CE/EU,ISO 9001


Q3: What primary products does your company provide?
A3: Our main products are 100% melamine tableware, houseware, melamine color tableware, kids tableware set ,tableware for Restaurants & Hotels, which are hot selling in China, Japen, Korea, America, Europe and Southeast Asia.


Q4: What is your payment terms?
A4: In general, we quote EXW or FOB price, payment 50% deposit by T/T before production, 50% balance paid within 7 days before shipment.


Q5: What's your production Lead-time for bulk order?
A5: Regular lead-time, 15 business days after deposit received and artwork confirmed.


Q6: What's the lead-time and cost for sample?
A6: We are glad to provide 1-3 free samples for our original products, shipping charge on buyer's cost. It will be already in 5 business days. Proofing sample will be charged according to the design, samples time will takes 10-15days.



Contact Us

Michael Lin

WeChat/Phone:13459565408

WhatsApp:+86-13459565408

Email:michael@gufaith.com

Website:www.melamine-powder.com

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Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Quanzhou Gufaith Houseware Co.,Ltd
Location Room 1110&1111, Lishang Building, Jiangbin South Road,Fuqiao, Licheng District, Quanzhou, Fujian, China.  
Contact Person Michael

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