Hostaform C 9021 K – Chalk-Modified Tribological POM-C

描述

Hostaform C 9021 K is a chalk-modified tribological POM-C (Polyoxymethylene Copolymer) injection molding material, genuinely manufactured by Celanese and imported as original product. We supply this grade as an authorized distributor / trader, ensuring full traceability and access to official Celanese technical documentation.

This grade is specifically modified with special chalk to deliver enhanced wear properties and self-lubricating characteristics, making it ideal for moving parts and sliding applications.

The “K” designation indicates a tribological modification with special chalk, which provides good wear resistance, excellent slip properties, and very high rigidity and hardness.

It exhibits outstanding chemical resistance (solvents, fuels & strong alkalis), hydrolysis resistance, fatigue resistance, creep resistance, moisture resistance, and stress cracking resistance. It also maintains toughness down to -40°C and offers higher stability to thermal and oxidative degradation compared to acetal homopolymers. With regular stock availability, we support both trial orders and bulk shipments for automotive, industrial, and precision engineering applications.

Key Features

Hostaform C 9021 K offers the following key performance benefits:

• Chalk Tribological Modification – The “K” grade offers specialty wear performance based on special chalk modification, combining high rigidity with good sliding properties.

• Very High Rigidity & Hardness – Provides excellent structural strength and surface hardness for demanding applications.

• Excellent Wear Properties – Good wear resistance for unlubricated or once-only-lubricant sliding parts.

• Outstanding Chemical Resistance – Resistant to solvents, fuels, and strong alkalis.

• Good Hydrolysis Resistance – Maintains properties in moist environments.

• High Resistance to Thermal & Oxidative Degradation – Ensures long-term performance in demanding environments.

• High Toughness – Maintains toughness even at low temperatures (down to -40°C).

• Good Heat Resistance – Heat deflection temperature up to 100°C at 1.8 MPa.

• Very Good Slip/Wear Properties – Self-lubricating properties for moving parts and sliding applications.

• Excellent Resilience – High resilience for demanding applications.

• Low Moisture Absorption – Ensures dimensional stability across varying environmental conditions.

• Easy Colorization – Can be easily colored to meet specific design requirements.

• Heavy-Metal Free – Environmentally friendly formulation.

• Regulatory Compliance – UL94 HB rated (natural, thickness >1.57mm); FMVSS 302 <100 mm/min (thickness >1mm); complies with RoHS and meets BgVV recommendation XXXIII for consumer goods. Full SDS available upon request.

Typical Applications

Explore our full range of engineering plastics solutions for more industry-specific case studies.

Material Advantages

The following material advantages make Hostaform C 9021 K the preferred choice for tribological and sliding applications:

• Chalk Modification vs. PTFE Modification – Unlike PTFE-modified grades (TF2 series), the “K” grade uses special chalk modification, providing a unique balance of good wear resistance, very high rigidity and hardness, and cost-effectiveness.

• Superior Dimensional Stability – Low moisture absorption and good creep resistance ensure parts maintain their dimensions across varying environmental conditions.

• Excellent Surface Quality – Good surface finish suitable for precision components.

• Outstanding Chemical & Environmental Resistance – Excellent resistance to solvents, fuels, strong alkalis, hydrolysis, fatigue, creep, moisture, and stress cracking.

• High Toughness – Maintains impact resistance and toughness even at low temperatures (down to -40°C).

• Good Thermal Stability – Higher stability to thermal and oxidative degradation compared to acetal homopolymers.

• Easy Colorization – Can be easily colored to meet specific design requirements.

• Heavy-Metal Free – Environmentally friendly formulation.

• Batch-to-Batch Consistency – Produced by Celanese under strict ISO standards, ensuring stable properties across all shipments.

• Reliable Supply – We maintain inventory and a stable supply chain. For details on our supply capabilities, please see our company background .

Typical Properties (ISO Standards)

Typical properties of Hostaform C 9021 K measured per ISO standards are listed below:

Important Notes on Typical Data:

1. Values listed are typical and based on Celanese official data sheets. They do not constitute a product specification.

2. Batch-to-batch variations may occur. Confirm properties with specific batch certificate for critical applications.

3. Final product performance depends on part design, molding conditions, and end-use environment.

4. Celanese original TDS remains the definitive reference. For detailed data, request the latest official TDS for Hostaform C 9021 K from our team.

Processing Guidelines (Injection Molding)

The following injection molding parameters are recommended for Hostaform C 9021 K:

Critical Processing Warnings for Hostaform C 9021 K:

• Thermal Degradation: POM can decompose at high temperatures, releasing formaldehyde gas. Ensure adequate ventilation and avoid prolonged residence time in the barrel.

• Material Purity: Strictly avoid contamination with other polymers, as this will compromise the chalk-modified tribological properties.

• Regrind/Recycled Material: Adding regrind is not recommended for this specialty grade. Chalk additives can degrade during re-processing, compromising mechanical and tribological properties. If necessary, use a very small percentage (<10%) only with prior validation testing.

• Storage: Store in a cool, dry place and use sealed, original packaging when possible.

Related Products

• Explore Our Full POM Product Portfolio – Browse all POM copolymer and homopolymer grades we supply.

• Chalk-Modified Tribological POM (K Series) – Discover high-rigidity, wear-resistant grades for sliding applications.

• PTFE-Modified Tribological POM (TF Series) – Compare low-friction PTFE-modified alternatives.

• High-Performance POM-C Grades – Discover copolymer acetal options with enhanced impact and creep resistance.

• POM for Sliding & Wear Applications – View grades specifically suited for moving parts and tribological applications.

Technical Documents

We provide the following documentation to support your material selection and compliance needs:

To request any of the above documents, please contact us via:

• Email: ruiqingchem@gmail.com

• Online form: Our contact page

We will respond within 1 working day. Please specify the document type and material grade.

External Reference

For additional information, please refer to the official Celanese Hostaform product portal and the latest material datasheets. Key technical standards referenced in this document include:

• ISO 1043 / ISO 11469 – Resin identification and part marking

• ISO 1183 – Density measurement

• ISO 527 – Tensile properties

• ISO 179 – Impact resistance

• ISO 75 – Heat deflection temperature

• ISO 1133 – Melt volume-flow rate

• ISO 11357 – Melting temperature

• ISO 294-4 – Mold shrinkage

• ISO 11359-1/-2 – Coefficient of thermal expansion

• ISO 2039-1 – Ball indentation hardness

• ISO 62 – Water absorption

• UL94 – Flammability

• FMVSS 302 – Automotive flammability

Our team can provide relevant excerpts from these standards for your reference.

FAQ

Q1: What is Hostaform C 9021 K and what is it used for?
A: It is a chalk-modified tribological POM-C (Polyoxymethylene Copolymer) injection molding material that offers good wear resistance, self-lubricating properties, very high rigidity and hardness. It is widely used in automotive, industrial machinery, precision engineering, electrical & electronics, and consumer goods applications, particularly for unlubricated or once-only-lubricant sliding parts.

Q2: What does “K” mean in the grade name?
A: K indicates a tribological modification with special chalk. This provides good wear properties, excellent slip characteristics, and very high rigidity and hardness. The resin identification code is POM-K, M-GNR, 03-002, K5.

Q3: What is the difference between Hostaform C 9021 K and PTFE-modified tribological grades (e.g., TF2)?
A: K series uses special chalk modification, providing very high rigidity and hardness with good wear resistance at a more cost-effective price point. TF series uses PTFE modification, providing lower friction coefficient and even better wear performance but at higher cost. Choose K for high-rigidity, wear-resistant applications where cost is a consideration; choose TF for ultra-low friction requirements.

Q4: What are the regulatory compliances of this material?
A: Hostaform C 9021 K complies with RoHS and meets BgVV recommendation XXXIII for consumer goods. UL94 HB rated (natural, thickness >1.57mm). FMVSS 302 burning rate <100 mm/min for thickness >1mm. Full compliance declarations are available upon request.

Q5: What are the key mechanical properties?
A: Tensile modulus of 3000 MPa, tensile stress at yield of 60 MPa, nominal strain at break of 22%, Charpy notched impact strength of 5 kJ/m², ball indentation hardness of 145 MPa, and heat deflection temperature of 100°C at 1.8 MPa.

Q6: Can I purchase this material and what is the lead time?
A: Yes, simply send your inquiry via our quick inquiry form or email us at ruiqingchem@gmail.com with your required quantity, application, and delivery address. Regular orders (1–5 tons) are typically delivered within 7–10 working days after order confirmation and payment receipt. Larger quantities or urgent orders can be discussed with our team.

Q7: What are the limitations of this material?
A: POM materials are not suitable for use with strong acids, strong oxidizing agents, or continuous high-temperature water (>80°C) . Please consult our technical team for chemical compatibility data for your specific use environment.

CTA (Call to Action)

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To provide you with an accurate quotation and technical support, please share the following information:

• Estimated quantity (kg or tons)

• Destination port or delivery address

• Intended application and part design (e.g., wall thickness, dimensions, sliding/wear requirements)

• Key performance requirements (e.g., wear resistance, rigidity, heat resistance)

• Need for third-party testing or compliance documentation

Sample Policy:

• Samples are provided for laboratory testing and validation only and are not for mass production.

• International freight costs for samples are borne by the buyer.

• If bulk material shows typical batch-to-batch variation from the sample, Celanese official TDS shall be the definitive reference standard.

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• Send Inquiry – Use our quick inquiry form

• Email Us – ruiqingchem@gmail.com

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After-Sales Support

We provide the following after-sales support to ensure a smooth procurement experience:

Disclaimer

DISCLAIMER: All data provided is for reference based on manufacturer (Celanese) typical values. Our company is an authorized distributor/trader, not a manufacturer. Final product performance depends on part design, processing, and end-use. User is responsible for evaluating material suitability for their specific application. We shall not be liable for end-product performance or design failures. Please refer to the latest official Celanese TDS for definitive specifications.