Gray POM Sheet (Polyoxymethylene / Acetal Sheet) - Professional Product Introduction

1. Product Overview

2. Material Composition & Color Characteristics

• Base Material: Virgin POM (Polyoxymethylene, CAS No.: 9002-81-7); available in homopolymer (higher rigidity and tensile strength) or copolymer (better impact resistance and chemical stability) grades.

• Color Specification: Uniform matte or semi-gloss gray (Pantone matching available upon request), with a color tolerance of ΔE ≤ 2, ensuring consistency across batches.

• Physical Structure: High crystallinity (60%-70% for homopolymer, 55%-65% for copolymer), dense molecular structure, low porosity (≤0.01%), and a smooth, burr-free surface (surface roughness Ra ≤ 0.8μm).

• Basic Physical Parameters: Density: 1.41-1.43 g/cm³; Melting point: 165-175°C (homopolymer) / 155-165°C (copolymer); Vicat softening temperature: 150-160°C (ISO 306).

3. Key Technical Features

• Mechanical Strength: High tensile strength (60-70 MPa for homopolymer, 50-60 MPa for copolymer, ISO 527), flexural strength (90-110 MPa), and hardness (Shore D 78-85), providing excellent load-bearing capacity and resistance to deformation under static and dynamic loads.

• Dimensional Stability: Exceptional dimensional accuracy with low linear expansion coefficient (1.0-1.5 × 10⁻⁵ /°C, 23-80°C), minimal warpage (≤0.2% per meter), and low moisture absorption (≤0.2% after 24 hours immersion in water at 23°C), ensuring consistent performance even in humid environments.

• Wear & Friction Performance: Outstanding wear resistance (abrasion loss ≤ 0.05 mm³, ASTM D3702) and low friction coefficient (0.15-0.25 against steel, dry condition), enabling self-lubricating performance that eliminates the need for additional lubrication in moving parts, reducing maintenance costs and extending service life.

• Temperature Resistance: Wide continuous working temperature range of -40°C to 105°C, with short-term resistance up to 120°C, making it suitable for applications in both low-temperature and moderate-temperature industrial environments without performance degradation.

• Chemical Resistance: Excellent resistance to mineral oils, greases, aliphatic solvents, weak acids, and weak bases; resistant to hydrolysis in water (up to 80°C) and steam; not resistant to strong acids, strong bases, and aromatic solvents (e.g., benzene, toluene).

• Electrical Properties: Good electrical insulation performance with volume resistivity ≥ 10¹⁴ Ω·cm, dielectric strength ≥ 20 kV/mm, and dielectric constant ≤ 3.5 (1 MHz), suitable for electrical insulation components in low-voltage equipment.

• Machinability: Easy to process using standard metalworking equipment, including CNC machining, turning, milling, drilling, grinding, and threading; no special tools or processing conditions are required, and the gray surface remains intact during processing, reducing post-processing costs.

• Aesthetic & Practicality: The uniform gray color provides a professional, low-glare appearance that masks minor scratches and wear, making it ideal for visible components in industrial equipment, instruments, and automation systems where aesthetics and functionality are equally important.

4. Core Product Advantages

• Long Service Life & Low Maintenance: The combination of high wear resistance, fatigue resistance (fatigue limit ≥ 25 MPa, 10⁷ cycles), and self-lubricating properties ensures a service life 2-3 times longer than traditional metal components, while eliminating the need for regular lubrication and maintenance, reducing operational downtime and costs.

• Cost-Effective Metal Replacement: With a density approximately 1/5 that of steel and 1/2 that of brass, gray POM sheet reduces component weight by 30%-70% compared to metal alternatives, lowering transportation and installation costs. Additionally, its lower raw material cost and easier machinability reduce overall production costs while maintaining equivalent or superior performance.

• Precision & Consistency: Strict quality control during extrusion ensures tight dimensional tolerances (thickness tolerance ±0.05 mm for sheets ≤10 mm, ±0.08 mm for sheets >10 mm), consistent material properties across batches, and uniform coloration, making it suitable for high-precision components that require interchangeability.

• Versatile Adaptability: Compatible with a wide range of processing methods (including welding, bonding, and thermoforming) and adaptable to diverse operating environments (humid, low-temperature, oil-contaminated), making it suitable for multiple industrial sectors.

• Environmental Friendliness: 100% recyclable, non-toxic (complies with RoHS, REACH, and FDA standards for food contact grades), and free of harmful substances, meeting global environmental and safety requirements for industrial materials.

• Aesthetic Advantage: The professional gray finish is aesthetically consistent with industrial equipment and instruments, hiding minor surface imperfections and reducing the need for additional surface treatment (such as painting or plating), saving time and costs.

5. Typical Applications

• Mechanical Engineering: Precision gears (spur gears, bevel gears), bearings, bushings, rollers, sliders, cams, and linkages; ideal for high-speed, low-noise moving parts in machinery due to its self-lubricating and wear-resistant properties.

• Automotive Industry: Interior mechanical components (window regulators, door locks, gearshift mechanisms), under-hood components (fuel system parts, pump components), and exterior trim parts; the gray color matches automotive interior aesthetics, and its light weight helps improve fuel efficiency.

• Automation & Conveyor Systems: Conveyor belt guides, wear plates, chain guides, slider beds, and robotic arm components; resistant to wear from continuous movement and compatible with food-grade requirements for packaging automation.

• Electronic & Electrical Equipment: Insulation panels, terminal blocks, switch housings, and connector components; its excellent electrical insulation properties and low moisture absorption ensure stable performance in electrical applications.

• Food & Beverage Machinery: Conveyor parts, guide rails, and processing components (food contact grades available); non-toxic, easy to clean, and resistant to food oils and cleaning agents, complying with FDA and EU food safety standards.

• Medical Devices: Structural components of medical equipment (e.g., instrument handles, support frames), non-implantable parts; non-toxic, biocompatible, and easy to sterilize (compatible with ethylene oxide sterilization).

• Pump & Valve Industry: Valve seats, valve cores, pump impellers, and seal rings; resistant to water, oil, and chemical media, ensuring leak-proof performance and long service life.

• Other Applications: Precision tooling, mold inserts, architectural hardware, and marine components (resistant to saltwater corrosion in mild environments).

6. Product Summary