POM-Celanese Celcon M90
يتطلب تحمل التعرض المطول للمنظفات القلوية والماء الساخن دون تحلل مائي بوليمر أسيتال مشترك متخصص، وهو ما يوفره Celcon M90 من Celanese من خلال مصفوفة البولي أوكسي ميثيلين المشترك المستقرة. بكثافة 1.41 جم/سم³ ومؤشر ذوبان 9.0 سم³/10 دقائق، توفر هذه الدرجة غير المقواة ثباتًا فائقًا في الماء الساخن وترسبًا أقل بكثير على القالب أثناء الإنتاج المستمر مقارنة بالأسيتالات المتجانسة. في جوتشينغ للدقة، وهي شركة مصنعة حاصلة على شهادات ISO 9001 وISO 13485 وIATF 16949، نتخصص في قولبة Celcon M90. باستخدام قوالب فولاذ S136 المصنعة بواسطة CNC خماسية المحاور داخل الشركة، نتحكم في انكماشه من 1.8% إلى 2.2%، ونقدم صمامات مياه مستقرة الأبعاد تم فحصها بواسطة CMM من زايس.
Celcon M90 Copolymer Hydrolytic & Thermal Profile
Celcon® M90 is a medium-viscosity acetal copolymer (POM-C) engineered by Celanese to deliver exceptional chemical inertness, high thermal stability, and low mold deposit during long-term production runs:
| Thermal/Chemical Feature | Celcon M90 Metric | Copolymer (POM-C) Life Cycle Advantage |
|---|---|---|
| Hydrolytic Stability | High resistance to hot water & strong bases | Exhibits superior resistance to strong alkaline detergents and hot-water hydrolysis compared to acetal homopolymers, preventing part chalking and degradation. |
| Processing Stability | Low-deposit chemical formulation | Designed to minimize mold deposit (plate-out) during continuous injection cycles, dramatically reducing downtime for mold cleaning and maintenance. |
| Physical Modulus | Flex Modulus 2600 MPa / Tensile 65 MPa | Offers high flexural strength and surface hardness, ensuring dimensional stability in high-wear water valves and fuel caps. |
Precision Engineering Process Suitability for Celcon M90
With its high-crystallization profile and low outgassing chemistry, Celcon M90 is optimized for dynamic mechanical assemblies:
| Process Classification | Engineering Implementation Details |
|---|---|
| Precision Fluid Valves & Water Fittings | Excellent. Fully optimized for hot water mixer valves, fuel caps, water meter housings, spray nozzles, and plumbing connectors requiring long-term chemical resistance. |
| Intricate Snap-Fit Fasteners | Excellent. High elastic recovery and flexural strength prevent structural fingers from shearing or stress whitening during continuous assembly. |
| Multi-Cavity Automations | Excellent. Exceptional thermal stability inside the hot runner manifold allows for rapid, low-maintenance injection cycles with tight dimensional repeatability. |
Molding Analysis: Celcon M90 Tooling & Low-Mold-Deposit Matrix
Molding an acetal copolymer like Celcon M90 requires specialized water-line layouts to counteract high shrink factors, alongside premium steel choice to prevent dynamic outgassing wear:
Low Mold Deposit (Plate-Out) Protection
Compared to homopolymer variants, Celcon M90 generates substantially fewer surface deposits (additives plate-out) on mirror-polished mold face cores. Jucheng’s tooling division uses premium S136 stainless steel hardened to 48–52 HRC to prevent chemical wear, increasing tool run lives between cleanings by up to 50%.
Compensating for High Volumetric Shrinkage
Acetal copolymer exhibits high volumetric shrinkage (1.80% to 2.20%). We employ conformal cooling loops machined on our 5-axis CNCs directly into core and cavity inserts, ensuring uniform heat dissipation across thin-walled valve bodies to prevent warpage and voiding.
Melt & Die Temperature Controls
Processing melt temperatures are maintained between 180°C and 210°C (356°F to 410°F) to protect molecular chain structures. Mold temperatures are kept at 80°C to 120°C (176°F to 248°F) using pressurized oil temperature controllers to optimize crystalline structure and mechanical strength.
Key Application Fields for POM-Celanese Celcon M90
- Hot-Water Plumbing & Fluids: Household hot-water mixer faucet valves, showerhead manifolds, central heating water regulators, flow meters, and pipe couplings.
- Automotive Fuel & Fluids (IATF 16949 Certified): Fuel sender caps, fuel tank breather valves, windshield wiper pivots, window regulator brackets, and cooling radiator connectors.
- Medical Consumables & Systems (ISO 13485 Compliant): Pharmaceutical dry-powder inhalers, surgical instrument sliding guides, dental testing caps, and non-implantable dynamic valve structures.
الخصائص
| الكثافة | 1.41 g/cm³ |
| Melt Volume-Flow Rate (MVR) (190°C/2.16kg) | 9 cm³/10min |
| معامل الشد | 2,800 ميجا باسكال |
| إجهاد الشد عند الخضوع | 65 MPa |
| Elongation at Yield | 9 % |
| الانفعال الاسمي عند الكسر | 30 % |
| معامل الانحناء | 2,600 ميجا باسكال |
| قوة الانحناء | 91 ميجا باسكال |
| قوة تأثير شاربي مع الشق (23 درجة مئوية) | 6 كيلوجول/م² |
| درجة حرارة الانصهار | 165 °C |
| نقطة تليين فيكات (B/50) | 144 °C |
| درجة حرارة الانحراف الحراري (HDT @ 1.80 MPa) | 110 °C |
| الانكماش الخطي للقالب | 1.80 - 2.20 % |
| الحد الأقصى لحجم الجزء | 1000 × 800 مم |
| الحد الأدنى لحجم الجزء | 1 × 1 مم |