{"id":3863,"date":"2024-05-17T21:49:23","date_gmt":"2024-05-17T21:49:23","guid":{"rendered":"https:\/\/blog.unionfab.com\/blog\/?p=5674"},"modified":"2024-11-01T17:21:46","modified_gmt":"2024-11-01T17:21:46","slug":"pom-material","status":"publish","type":"post","link":"https:\/\/wp.unionfab.com\/ja\/pom-material\/","title":{"rendered":"POM Material: A Versatile Engineering Plastic"},"content":{"rendered":"
This guide explores POM material\u2019s properties & uses in industries like automotive & consumer goods, revealing its significance for manufacturers.<\/p>\n
Introduction<\/h2>\n
POM material is a semi-crystalline thermoplastic, boasting high mechanical strength, dimensional stability, and low friction, ideal for various applications including gears and precision parts.<\/p>\n
Its cost-effectiveness, versatility, and functional performance make it indispensable in manufacturing, offering reliable functionality and design flexibility across industries from automotive to medical devices.<\/p>\n
What is POM Material<\/h2>\n
Definition and Composition<\/h3>\n
POM, or polyacetal, is a semi-crystalline engineering thermoplastic derived from formaldehyde (CH2O)n. Its molecular structure includes a carbon atom bonded to two -OR groups, giving it both crystalline and amorphous regions.<\/p>\n
This unique composition contributes to its notable properties, including good dimensional stability.<\/p>\n
Types of POM \uff2daterial<\/h3>\n
\n
\n
POM-H (Homopolymer):<\/strong> This is the standard POM variety, known for its well-balanced mechanical properties, good chemical resistance, and natural white color.<\/p>\n<\/li>\n
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POM-C (Copolymer):<\/strong> This type offers even higher chemical resistance and improved long-term dimensional stability compared to POM-H. However, it has slightly lower mechanical strength.<\/p>\n<\/li>\n<\/ul>\n
Improving POM Material with Additives<\/h2>\n
Additionally, POM can be modified with various additives like:\u3000<\/p>\n
\n
\n
Glass fibers:<\/strong> Enhance stiffness and dimensional stability<\/p>\n<\/li>\n
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Lubricants:<\/strong> Improve wear resistance and sliding properties<\/p>\n<\/li>\n
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Flame retardants:<\/strong> Increase fire resistance<\/p>\n<\/li>\n<\/ul>\n
These modifications result in a wider range of POM materials suitable for specific applications.<\/p>\n
Properties of POM Material<\/h2>\n
TL;DR: The following chart provides a summary of the content for an easy read.<\/p>\n
\n
\n
\n
\n
\n
<\/colgroup>\n
\n
\n
\n
Category<\/p>\n<\/th>\n
\n
Property<\/p>\n<\/th>\n
\n
Description<\/p>\n<\/th>\n<\/tr>\n
\n
\n
Mechanical<\/strong><\/p>\n<\/td>\n
\n
Strength and Durability<\/p>\n<\/td>\n
\n
High<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Impact Resistance<\/p>\n<\/td>\n
\n
Good<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Friction<\/p>\n<\/td>\n
\n
Low coefficient<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Wear Characteristics<\/p>\n<\/td>\n
\n
Excellent<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Thermal<\/strong><\/p>\n<\/td>\n
\n
Melting Point<\/p>\n<\/td>\n
\n
High<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Temperature Resistance<\/p>\n<\/td>\n
\n
Good<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Thermal Expansion<\/p>\n<\/td>\n
\n
Low coefficient<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Chemical<\/strong><\/p>\n<\/td>\n
\n
Resistance to Chemicals and Solvents<\/p>\n<\/td>\n
\n
Good<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Hydrolysis Resistance<\/p>\n<\/td>\n
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Good<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Electrical<\/strong><\/p>\n<\/td>\n
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Dielectric Strength<\/p>\n<\/td>\n
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Good<\/p>\n<\/td>\n<\/tr>\n
\n
\n<\/td>\n
\n
Insulating Properties<\/p>\n<\/td>\n
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High<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>Properties of POM Material<\/em><\/figcaption><\/figure>\n
Mechanical properties<\/h3>\n
POM is strong, durable, and tough, capable of withstanding stress without deforming. It offers decent impact resistance ,especially in cold conditions, and excels in low-friction and high wear scenarios, perfect for parts requiring durability in moving contacts.<\/p>\n
Thermal properties<\/h3>\n
With a high melting point and consistent performance at temperatures up to 100\u00b0C, POM maintains its shape and strength when exposed to heat. Its low thermal expansion rate ensures size stability despite temperature changes.<\/p>\n
Chemical properties<\/h3>\n
Resistant to many chemicals including alcohols and hydrocarbons, POM is not compatible with strong acids and bases. It stands up well against hydrolysis, remaining stable in hot and humid conditions.<\/p>\n
Electrical properties<\/h3>\n
POM has strong dielectric properties, effectively preventing electrical leaks, positioned well as an electrical insulator with high resistance to electrical conductivity.<\/p>\n
Applications of POM Material<\/h2>\n
Automotive Industry<\/h3>\n
\n
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Interior Components:<\/strong> POM\u2019s strength and abrasion resistance make it ideal for instrument panels, bushings, seat adjusters, armrests, door handles, and knobs.<\/p>\n<\/li>\n
\n
Fuel System Parts:<\/strong> POM’s toughness and chemical resistance suit fuel lines, rails, pump housings, valves, and sensor components.<\/p>\n<\/li>\n<\/ul>\n
16 POM Applications in the Automotive Sector<\/em> Source: researchgate.net<\/em><\/figcaption><\/figure>\n
Consumer goods<\/h3>\n
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\n
Handles and Knobs:<\/strong> POM\u2019s durability and resistance to deformation suit doorknobs, cabinet hardware, appliance knobs, levers, and tool handles.<\/p>\n<\/li>\n
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Zippers and Fasteners:<\/strong> Its low friction and resilience make POM ideal for zipper sliders, teeth, coil springs, and snaps.<\/p>\n<\/li>\n<\/ul>\n
Engineering Applications<\/h3>\n
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\n
Gears and Bearings:<\/strong> POM\u2019s stability and low friction fit gears, low-load bearings, and bushings.<\/p>\n<\/li>\n
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Valve Components:<\/strong> Its chemical resistance suits valve seats, seals, bodies, and housings in various engineering applications.<\/p>\n<\/li>\n<\/ul>\n
3D Printing POM Gear Set Source: amazon.com<\/em><\/figcaption><\/figure>\n
Medical Devices<\/h3>\n
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Surgical Instruments:<\/strong> POM\u2019s biocompatibility and sterilizability suit handles and housings for surgical instruments.<\/p>\n<\/li>\n
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Dental Applications:<\/strong> Its resistance to sterilization makes POM suitable for disposable dental tools and orthodontic retainers.<\/p>\n<\/li>\n<\/ul>\n
POM Medical Mask<\/em> Source: proceduraloxygenmask.com<\/em><\/figcaption><\/figure>\n
Advantages and Disadvantages of POM Material<\/h2>\n
Advantages of POM Material<\/h3>\n
\n
\n
High mechanical strength:<\/strong> POM is a tough and rigid plastic, making it suitable for parts that need to bear significant loads without deforming.<\/p>\n<\/li>\n
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Excellent dimensional stability:<\/strong> POM retains its shape well even under varying temperatures and moisture conditions. This makes it ideal for precision parts.<\/p>\n<\/li>\n
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Low coefficient of friction:<\/strong> POM has a slippery surface, reducing friction and wear in moving parts. This makes it useful for gears, bearings, and rollers.<\/p>\n<\/li>\n
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Ease of machining and fabrication:<\/strong> POM can be easily machined using conventional tools and techniques. It can also be welded, threaded, and polished.<\/p>\n<\/li>\n<\/ul>\n
Disadvantages of POM Material<\/h3>\n
\n
\n
Poor chemical resistance:<\/strong> POM can be degraded by strong acids, bases, and solvents. This limits its use in environments with harsh chemicals.<\/p>\n<\/li>\n
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High moisture absorption:<\/strong> While not as high as some nylons, POM can absorb moisture over time, which can affect its dimensional stability and mechanical properties.<\/p>\n<\/li>\n
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Limited UV resistance:<\/strong> POM can degrade when exposed to ultraviolet light for extended periods. This makes it less suitable for outdoor applications.<\/p>\n<\/li>\n
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Flammability:<\/strong> POM is flammable and will burn if exposed to an ignition source. It may not be suitable for applications with fire safety requirements.<\/p>\n<\/li>\n
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Brittle at low temperatures:<\/strong> POM can become brittle and more susceptible to cracking at low temperatures.<\/p>\n<\/li>\n
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Difficult to paint and bond:<\/strong> POM’s low surface energy makes it challenging to make paints and adhesives adhere well. Special surface treatments may be required.<\/p>\n<\/li>\n<\/ul>\n
POM Material: Limitations and Considerations<\/h2>\n
Limitations Due to Water Absorption<\/h3>\n
Water absorption in POM leads to dimensional changes and weakened mechanical properties, requiring alternative materials for high-load or outdoor applications to ensure long-term performance.<\/p>\n
Environmental Considerations<\/h3>\n
Exposure to chemicals or fluctuations in humidity and temperature affects water absorption in POM, potentially degrading the material.<\/p>\n
Design Considerations<\/h3>\n
Maintaining uniform part thickness is vital for preserving dimensional stability and mechanical properties in POM. Surface treatments and alternative materials like PEEK can further mitigate water absorption issues, improving reliability.<\/p>\n
POM Material Compared to other materials<\/h2>\n
POM Compared to Metals<\/h3>\n
\n
\n
\n
\n
\n
<\/colgroup>\n
\n
\n
\n
Properties<\/p>\n<\/th>\n
\n
POM<\/p>\n<\/th>\n
\n
Metals<\/p>\n<\/th>\n<\/tr>\n
\n
\n
Weight<\/p>\n<\/td>\n
\n
Lightweight<\/p>\n<\/td>\n
\n
Heavier<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Corrosion Resistance<\/p>\n<\/td>\n
\n
Excellent<\/p>\n<\/td>\n
\n
Variable<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Friction<\/p>\n<\/td>\n
\n
Low<\/p>\n<\/td>\n
\n
Higher, may need lubricants<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Strength<\/p>\n<\/td>\n
\n
Stiff, less strong than metals<\/p>\n<\/td>\n
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Very high<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Thermal Conductivity<\/p>\n<\/td>\n
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Low<\/p>\n<\/td>\n
\n
High<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>Comparison Table: POM vs. Metals<\/em><\/figcaption><\/figure>\n
POM outperforms<\/strong> metals in several aspects: it\u2019s lightweight, corrosion-resistant, and exhibits low friction properties.<\/p>\n
Nonetheless, it falls short<\/strong> in terms of strength and thermal conductivity when compared to metals.<\/p>\n
POM Compared to Other Plastics<\/h3>\n
\n
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\n
\n
\n
<\/colgroup>\n
\n
\n
\n
Properties<\/p>\n<\/th>\n
\n
POM<\/p>\n<\/th>\n
\n
Other Plastics<\/p>\n<\/th>\n<\/tr>\n
\n
\n
Stiffness<\/p>\n<\/td>\n
\n
Higher<\/p>\n<\/td>\n
\n
Variable<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Friction<\/p>\n<\/td>\n
\n
Low<\/p>\n<\/td>\n
\n
May be higher<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Chemical Resistance<\/p>\n<\/td>\n
\n
Good<\/p>\n<\/td>\n
\n
Ranges widely<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Impact Strength<\/p>\n<\/td>\n
\n
Good (esp. low temps)<\/p>\n<\/td>\n
\n
Some plastics higher<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Temperature Resistance<\/p>\n<\/td>\n
\n
Moderate<\/p>\n<\/td>\n
\n
Some plastics higher<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>Comparison Table: POM vs. Other Plastics<\/em><\/figcaption><\/figure>\n
POM exhibits distinct characteristics<\/strong> compared to other plastics. It boasts higher stiffness, ensuring precise part dimensions, and low friction for smooth movement. Additionally, POM offers good chemical resistance, making it suitable for harsh environments.<\/p>\n
However, it falls short<\/strong> in impact strength when compared to some plastics, especially at low temperatures, and has limited temperature resistance, making it less ideal for high-temperature applications.<\/p>\n
POM Compared to Engineering Polymers<\/h3>\n
\n
\n
\n
\n
\n
<\/colgroup>\n
\n
\n
\n
Properties<\/p>\n<\/th>\n
\n
POM<\/p>\n<\/th>\n
\n
Engineering Polymers<\/p>\n<\/th>\n<\/tr>\n
\n
\n
Cost<\/p>\n<\/td>\n
\n
Affordable<\/p>\n<\/td>\n
\n
Typically higher<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Machinability<\/p>\n<\/td>\n
\n
Easy<\/p>\n<\/td>\n
\n
Can vary<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Stability<\/p>\n<\/td>\n
\n
Excellent<\/p>\n<\/td>\n
\n
Varies, some exceptional<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Temp Resistance<\/p>\n<\/td>\n
\n
Moderate<\/p>\n<\/td>\n
\n
Generally higher<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Chemical Resistance<\/p>\n<\/td>\n
\n
Moderate<\/p>\n<\/td>\n
\n
Often superior<\/p>\n<\/td>\n<\/tr>\n
\n
\n
Strength (High Temperatures)<\/p>\n<\/td>\n
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Lower<\/p>\n<\/td>\n
\n
Usually remains strong<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>Comparison Table: POM vs. Engineering Polymers<\/em><\/figcaption><\/figure>\n
POM stands out<\/strong> in comparison to engineering polymers. It offers advantages such as affordability, easy machinability, and excellent dimensional stability.<\/p>\n
However, it has limitations<\/strong> including lower temperature resistance, limited chemical resistance, and reduced strength at elevated temperatures compared to engineering polymers.<\/p>\n
Conclusion<\/h2>\n
Polyoxymethylene (POM), a versatile engineering plastic, offers high strength, stability, and ease of production. Its low friction and cost-effectiveness make it ideal for various components. However, limitations such as poor chemical resistance and brittleness in cold temperatures must be considered.<\/p>\n
Despite these drawbacks, POM remains significant due to its balanced properties, finding use in gears, bearings, and other applications across industries, providing a competitive edge in cost-sensitive production environments.<\/p>\n
Discover High-Performance Materials at Unionfab<\/h2>\n
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![\"3D](\"https:\/\/ufc-dtc-cms.oss-accelerate.aliyuncs.com\/blog\/20240517\/185650_fdxgcrxlg.png\")
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![\"Unionfab](\"https:\/\/ufc-dtc-cms.oss-accelerate.aliyuncs.com\/blog\/20240517\/185723_6iwi23lae.png\")
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