POM-H(Homopolymer Acetal)

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POM-H(Homopolymer Acetal)

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POM-H is a high-rigidity, high-strength engineering plastic designed for demanding mechanical applications. Its combination of: Excellent stiffness, Superior fatigue resistance, Low friction behavior, Dimensional precision, Outstanding wear resistance.
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Overview of POM-H (Homopolymer Acetal)

What is POM-H?

POM-H (Homopolymer Acetal) is a highly crystalline engineering thermoplastic produced from a single formaldehyde monomer polymerization process.

Compared with POM-C (Copolymer Acetal), POM-H features:

Higher crystallinity

Greater rigidity

Higher tensile strength

Improved hardness

Better creep resistance

Superior fatigue durability

Because of its excellent mechanical strength and metal-like rigidity, POM-H is widely recognized as one of the highest-performance materials within the acetal family.

Key Product Characteristics of POM-H

1. Outstanding Rigidity and Structural Strength

One of the most notable characteristics of POM-H is its exceptional stiffness.

Compared with many standard engineering plastics, POM-H offers:

Higher tensile strength

Higher flexural modulus

Greater surface hardness

Strong load-bearing capability

Its rigid molecular structure enables excellent dimensional retention under continuous mechanical stress.

Suitable for:

Precision mechanical parts

Structural support components

High-load engineering assemblies

Machined industrial parts

2. Superior Fatigue and Creep Resistance

POM-H performs extremely well under repeated mechanical movement and long-term cyclic loading.

Advantages include:

Excellent fatigue endurance

Strong resistance to repeated impact

Low creep deformation

Long service life under dynamic loads

This makes POM-H ideal for:

Mechanical springs

Snap-fit components

Repetitive motion assemblies

High-cycle industrial equipment

3. Excellent Sliding and Wear Performance

POM-H provides very good tribological behavior in moving systems.

Key benefits:

Low friction surface

Good dry-running capability

Excellent abrasion resistance

Smooth sliding characteristics

It is frequently used in:

Bearings

Bushings

Rollers

Conveyor wear parts

Mechanical guide systems

Under high mechanical load conditions, POM-H can deliver highly reliable wear performance.

4. High Dimensional Precision

Due to its low moisture absorption and highly crystalline structure, POM-H maintains excellent dimensional consistency.

Characteristics include:

Stable tolerances

Minimal deformation

Good machining accuracy

Reliable dimensional control

Especially suitable for:

CNC machined components

Precision industrial parts

Automation equipment components

Tight-tolerance engineering assemblies

5. Excellent Electrical Insulation Properties

POM-H also offers reliable electrical insulation characteristics.

Features include:

High dielectric strength

Stable insulation resistance

Good arc resistance

Low dielectric loss

Applications include:

Electrical structural parts

Insulation components

Switch systems

Connector housings

6. Good Heat Resistance for Mechanical Applications

Compared with many general engineering plastics, POM-H provides relatively high thermal resistance.

Advantages include:

Higher short-term heat resistance

Good mechanical stability at elevated temperatures

Stable performance under frictional heat

Typical long-term service temperature:

Approximately -40°C to 100°C

This makes POM-H suitable for:

Mechanical transmission systems

Industrial moving parts

High-speed rotating components

Typical Applications of POM-H (Homopolymer Acetal)

1. Heavy-Duty Mechanical Systems

POM-H is widely used in high-load and high-stress mechanical environments where rigidity and strength are critical.

Typical parts include:

* High-load gears (spur gears, worm gears)

* Load-bearing bushings and sleeves

* Structural support brackets

* Mechanical transmission components

* Heavy-duty rollers and guide wheels

Why POM-H:

Its high stiffness and excellent creep resistance ensure stable performance under continuous load.

2. Precision Motion & Transmission Components

Due to its excellent dimensional stability and low deformation, POM-H is ideal for precision motion systems.

Applications include:

* Linear guide sliders

* Precision gear assemblies

* Cam mechanisms

* Drive and transmission shafts

* Timing and indexing components

Key advantage:

Maintains tight tolerances during long-term mechanical cycling.

3. Automotive Structural & Functional Parts

POM-H is commonly used in automotive applications requiring high strength and mechanical reliability.

Typical components:

* Window lift mechanism parts

* Seat adjustment gears and sliders

* Door lock mechanical components

* Steering column auxiliary parts

* Fuel system structural connectors

Benefit:

Provides metal-replacement performance with reduced weight and noise.

4. Industrial Automation & Robotics

POM-H is widely applied in automation equipment requiring continuous motion and high durability.

Examples include:

* Robot joint bushings

* Pick-and-place mechanism parts

* Conveyor drive components

* Indexing system gears

* Automated assembly fixtures

Why it works:

Excellent fatigue resistance supports high-cycle operation.

5. Electrical & High-Precision Equipment

POM-H is suitable for components requiring insulation and structural precision.

Applications include:

* Precision electrical housings

* Connector support frames

* Switch internal structural parts

* Sensor mechanical supports

* Insulating mounting components

Key benefit:

Stable electrical insulation combined with mechanical rigidity.

6. Wear-Resistant Sliding Components

POM-H performs well in dry-running and low-lubrication environments.

Typical parts:

* Sliding rails and wear strips

* Guide blocks

* Low-speed bearings

* Friction pads

* Mechanical contact interfaces

Advantage:

Low friction and high wear resistance ensure long service life without lubrication.

7. CNC Machined Precision Parts

POM-H is widely used for machining high-precision engineering components.

Typical products:

* Custom machined structural parts

* Tight-tolerance industrial components

* Prototype mechanical parts

* Precision jigs and fixtures

* Semiconductor equipment components

Key reason:

Excellent machinability and stable dimensional behavior.

Summary Positioning

POM-H is best suited for:

* High-load mechanical structures

* Precision motion systems

* Long-cycle fatigue applications

* Tight-tolerance machined parts

* Metal replacement in structural engineering

Technical Data Dheet of JUTAIPOM® NA-H Series

The performance properties of the JUTAIPOM® NA-H series are shown in the table below:

Property	Test Standard	Unit	Value (JUTAIPOM® NA-H)
Density	ISO 1183-1	g/cm³	1.41 ± 0.02
Melting Point	ISO 11357	°C	≥165
Tensile Yield Strength	ISO 527-2	MPa	≥65
Tensile Modulus	ISO 527-2	GPa	≥2.8
Elongation at Break	ISO 527-2	%	≥32
Notched Impact Strength	ISO 179	kJ/m²	≥6.0
Flexural Strength	ISO 178	MPa	≥90
Flexural Modulus	ISO 178	GPa	≥2.8
Rockwell Hardness	ISO 2039-2	HRM	≥84
Heat Deflection Temperature	ISO 75-2	°C	≥98
Water Absorption (24h)	ISO 62	%	≤0.05
Volume Resistivity	IEC 62631-3-1	Ω·cm	10¹² – 10¹⁶
Surface Resistivity	IEC 62631-3-1	Ω	10¹² – 10¹⁵
Dielectric Strength	IEC 60243-1	kV/mm	≥15
Dielectric Constant	IEC 62631-2-1 / IEC 60250	—	3.4 – 3.8
Dielectric Dissipation Factor	IEC 62631-2-1 / IEC 60250	—	≤8 × 10⁻³