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Help CenterPOM C27021 Acetal Copolymer Resin, 220°C Melting Point, Low Moisture Absorption, 0.2% MFR for Precision Parts
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Shanghai Yunshan Plasticizing Co., Ltd., based in Shanghai, China, is proud to present POM C27021 Acetal Copolymer Resin – a high-performance engineering plastic designed specifically for demanding precision parts. This grade offers a balanced combination of thermal stability, dimensional accuracy, and low moisture sensitivity, making it an ideal choice for applications where tight tolerances and consistent mechanical properties are critical. With a melting point of 220°C and a controlled MFR of 0.2%, it ensures excellent flow during injection molding while maintaining superior part strength.
Our POM C27021 is a copolymer acetal resin that outperforms homopolymer alternatives in long-term thermal resistance and chemical stability. It is particularly suited for gears, bearings, bushings, sliding components, and other precision mechanical parts that require low friction, high wear resistance, and excellent dimensional stability. Whether you are manufacturing automotive interior components, consumer electronics, or industrial machinery parts, this resin delivers consistent quality and reliable performance batch after batch.
Key Features & Technical Specifications
- High Melting Point (220°C): Ensures thermal stability during processing and end-use in elevated temperature environments.
- Low Moisture Absorption: Typically below 0.2%, minimizing dimensional changes and maintaining mechanical integrity in humid conditions.
- Controlled MFR (0.2%): Optimized for precision injection molding, offering excellent melt flow without sacrificing impact resistance.
- Excellent Wear Resistance: Low coefficient of friction and high abrasion resistance extend the life of moving parts.
- Good Chemical Resistance: Resists many solvents, fuels, and weak acids, making it suitable for automotive and industrial applications.
- Dimensional Stability: Low shrinkage and warpage enable tight-tolerance parts up to ±0.1mm.
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 1.41 g/cm³ | ISO 1183 |
| Melting Point | 220°C | ISO 11357 |
| Melt Flow Rate (MFR) | 0.2 g/10 min (190°C/2.16kg) | ISO 1133 |
| Moisture Absorption (24h, 23°C) | ISO 62 | |
| Tensile Strength | 60 MPa | ISO 527 |
| Elongation at Break | 30% | ISO 527 |
| Notched Izod Impact (23°C) | 7 kJ/m² | ISO 180 |
Benefits for Precision Parts Manufacturing
- Reduced Scrap Rates: Consistent flow and low moisture sensitivity minimize defects like splay, sink marks, and voids.
- Faster Cycle Times: Good thermal conductivity and controlled crystallization allow shorter cooling times.
- Longer Tool Life: Low abrasiveness compared to glass-filled grades reduces wear on injection molds.
- Design Flexibility: Suitable for complex geometries, thin walls, and tight tolerances down to ±0.05mm.
Shanghai Yunshan Plasticizing Co., Ltd. has been serving the global plastics industry for years, with a strong focus on quality assurance and customer satisfaction. Our POM C27021 is sourced from reputable manufacturers and undergoes rigorous incoming inspection to ensure consistency. We maintain a stable inventory in our Shanghai warehouse, capable of fulfilling orders of 1 ton to 20 tons within 5–7 working days. Our technical team is available to provide processing recommendations, including optimal drying conditions (80–90°C for 2–3 hours), melt temperature range (190–210°C), and mold temperature control (60–80°C).
We have successfully supplied this grade to over 100 precision molding companies across Asia, Europe, and North America. Feedback highlights its excellent dimensional stability and low rejection rates. Contact us today for a free sample, quotation, or technical consultation. Let Shanghai Yunshan Plasticizing be your reliable partner in engineering plastics.
Frequently Asked Questions (FAQ)
Q1: What is the difference between POM homopolymer and copolymer? Which is better for precision parts?
POM copolymer (like C27021) offers better thermal stability and chemical resistance than homopolymer, with lower tendency to degrade during processing. For precision parts requiring long-term stability in humid or hot environments, copolymer is often preferred.
Q2: Can POM C27021 be used for food contact applications?
This grade is not specifically tested for food contact. Please contact us if you require a food-grade certified variant; we can recommend suitable alternatives upon request.
Q3: What is the recommended drying condition before processing?
We recommend drying at 80–90°C for 2–3 hours using a dehumidifying dryer. Moisture content should be below 0.02% before injection molding to avoid hydrolytic degradation.
Q4: Is this material suitable for glass-fiber reinforcement?
POM C27021 is a neat resin. If you need glass-fiber reinforced POM, we can supply other grades (e.g., GF20, GF30) from our product range. Please inquire.
Q5: What is the typical shrinkage rate for this grade?
Mold shrinkage is approximately 1.8–2.2% (parallel to flow) and 1.9–2.5% (perpendicular to flow), depending on processing conditions. We can provide a detailed shrinkage simulation report upon request.
Q6: How should I store the resin to maintain its properties?
Store in a cool, dry place below 30°C, away from direct sunlight and moisture. Sealed original packaging can keep the resin in good condition for up to 12 months.
Q7: Can I get a sample to test before bulk order?
Yes, we offer free samples (0.5–1 kg) for quality evaluation. Shipping cost may apply. Contact our sales team to arrange.
Q8: What is the minimum order quantity (MOQ) for this resin?
Standard MOQ is 500 kg (one pallet). For smaller quantities, please check with our sales representative for availability.
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