We've all heard the saying 'Knowledge is power'. This adage certainly holds true when comparing two materials, such as POM/Delrin/Acetal and Polyethylene (PE).

In this article, we'll be exploring the differences and similarities between these two materials in terms of physical properties, mechanical properties, uses, cost comparisons and advantages and disadvantages.

By the end of it, you'll have a better understanding of both materials to help you make an informed decision about which one is right for your project.

So let's dive in!

Overview of POM/Delrin/Acetal

You may have heard of these materials before, but do you know what makes them distinct from one another? Let's take a closer look and find out.

Polyoxymethylene (POM), also known as Acetal or Delrin, is a type of thermoplastic polymer with good physical properties and chemical resistance. It often comes in the form of sheets or rods and is most frequently used in automotive engineering, industrial machinery, and consumer goods. POM has high stiffness, low friction coefficient, and excellent dimensional stability— making it an ideal material for precision parts that require tight tolerances.

Acetal copolymer is similar to POM but has higher impact strength than homopolymer POM due to its modified molecular structure. It also provides superior wear characteristics when compared to polyethylene (PE). The combination of good mechanical properties and chemical resistance make acetal an attractive option for medical device components such as arthroscopic instruments or implantable orthopedic devices.

In addition, acetal can be easily machined into complex geometries which makes it a popular choice for gears and other intricate parts requiring precision manufacturing processes.

Overview of Polyethylene (PE)

Overview of Polyethylene (PE)

We've already explored the properties and uses of POM/Delrin/Acetal, and now let's take a look at Polyethylene (PE).

Polyethylene is a versatile plastic that has many practical applications and can be used for a variety of purposes. It's lightweight, cost-effective, flexible, durable, and resistant to many chemicals - making it an ideal choice for industrial parts or components. PE is also able to resist wear and tear more than other types of plastics, which makes it an attractive option for creating longer-lasting products.

In addition, PE doesn't require complex production processes like other plastics do, so it can often be produced faster and cheaper in comparison.

Though PE may not have the same strength as some of the other materials such as POM or Delrin/Acetal, it still has its place in the world due to its ease of use, affordability, and range of applications.

It can be used to make items such as food packaging, plastic bags, toys, protective equipment, and more - giving those who need them access to quality products without breaking their budget.

Thanks to its versatility and wide availability, polyethylene has become an essential material for many industries around the world.

Compare Physical Properties

We'll be comparing the physical properties of polyethylene (PE), POM , delrin, and acetal to better understand how they compare. Specifically, we'll look at strength, density, thermal conductivity, and chemical resistance.

All these materials have different applications depending on the environment in which they are used. Let's dive into each property to see how they stack up against each other.


Strength of POM / Delrin / Acetal Vs Polyethylene (PE)

When it comes to strength, POM, Delrin, and Acetal demonstrate impressive durability compared to Polyethylene. These materials are highly resistant to impact and stress cracking, making them an excellent choice for applications that require strong parts that can endure a lot of wear and tear.

They also have superior tensile strength when compared to Polyethylene, allowing them to hold up better in dynamic applications where high mechanical loads are expected. Furthermore, POM, Delrin, and Acetal all possess good fatigue resistance and creep resistance, which lets them perform well even under repeated loading over a long period of time.

All these qualities make the three materials ideal for manufacturing components that need to be tough yet lightweight.


Comparing the densities of POM, Delrin, and Acetal to that of Polyethylene reveals a distinct contrast in their weights.

POM, also known as polyoxymethylene, has a density of 1.41 g/cm3. Delrin has a density of 1.41-1.43 g/cm3 and Acetal copolymer (POM-C) has a density of 1.37-1.39 g/cm3 - all considerably more dense than Polyethylene's 0.93 - 0.97 g/cm3 range.

This difference in densities is important for applications where weight matters, such as aerospace engineering or automotive components. Lighter materials can be used to reduce the overall weight of the product without compromising on strength or durability.

However, for some industrial applications, heavier materials may be preferable due to their greater resistance to vibration and shock loads. Such loads could potentially compromise the performance or safety of lighter materials under certain conditions.

Ultimately, each material needs to be evaluated on its own merits depending on the application it is being used for and its relative advantages over other options available in terms of cost, weight, strength, and durability.

Thermal Conductivity

Now that we've explored the differences and similarities in density between POM , delrin, acetal, and polyethylene (PE), let's talk about how they differ in terms of thermal conductivity. Thermal conductivity is a measure of how quickly heat is transferred through a material.

All four materials have different capabilities when it comes to thermal conductivity:

  • POM /Delrin/Acetal:
    These three plastics all have very similar thermal conductivities, which are much higher than PE. This makes them great for applications where good heat dissipation is required.
  • Polyethylene (PE):
    On the other hand, PE has a much lower thermal conductivity than the other three plastics. This means it's not as effective at dissipating heat but does provide better insulation if that's what's desired.

No matter which plastic you choose for your application, knowing the properties of each will help you make an informed decision about which one best suits your needs!

Chemical Resistance

We all know that chemical resistance is a key factor when selecting the right plastic for an application. Different plastics react differently to certain chemicals, so it's important to consider this when making your decision!

When comparing POM , delrin, acetal, and polyethylene (PE), we can see that they all have different levels of resistance to chemicals. POM and delrin are both more resistant to alkalis than PE, while acetal is very resistant to most organic acids. In general, however, none of these plastics has good resistance to strong mineral acids and halogens.

PE does have excellent resistance against oil and grease but lacks in many other areas such as solvents like ketones and esters. Ultimately, it depends on what kind of chemical you're dealing with as some may be more compatible with one material or another. It's best to do your research before making any final decisions!

Compare Mechanical Properties

We've been exploring the differences and similarities between POM, Delrin, Acetal and Polyethylene. Discover how the unique characteristics of POM, Delrin and Acetal contrast against Polyethylene and see how they stack up in terms of strength and performance.

All four materials differ in their mechanical properties which are important when deciding which material to use for any application. POM has excellent stiffness, low moisture absorption, good dimensional stability under heat, as well as outstanding wear resistance. Delrin is known for its high tensile strength and creep resistance while acetal is strong with a combination of stiffness and toughness. Meanwhile, polyethylene boasts good chemical resistance but is not as strong or durable as other plastics.

When it comes to impact strength, all four materials have varying levels depending on the type of polymers used - however, Delrin typically outperforms POM while Acetal stands out for its superior chemical resistance compared to polyethylene.

All in all, it's important to consider the need for each property when choosing which material will best suit your needs.

Compare Uses

Strength of POM Delrin Acetal Vs Polyethylene (PE)

Moving on from the mechanical properties of POM, Delrin, acetal, and polyethylene (PE), let's explore how they are used in different applications.

We can see a range of uses for these materials across various industries. POM and Delrin are commonly used in automotive and aerospace engineering, where strength and durability are paramount. Acetal is often employed in medical devices due to its resistance to chemical degradation. Polyethylene (PE) is most often used as a packaging material for food items or pharmaceuticals due to its low cost, lightweight nature, corrosion resistance, and flexibility.

In addition, PE is also widely used in the construction industry because it has good insulation properties which make it useful for piping systems. Ultimately, each material has specific advantages that make them suitable for different projects.

Cost Comparison

Comparing the costs of these materials, you'll find that polyethylene (PE) is often the most economical choice due to its low price and lightweight nature. PE is widely available and can be purchased in a variety of thicknesses for different applications.

When compared to POM , delrin, and acetal, PE is more cost effective because:

  • It's generally cheaper than other plastics
  • It's easier to mold into complex shapes since it doesn't require as much pressure or heat during manufacturing
  • Its lighter weight means less material needs to be used which reduces overall production costs
  • It has good chemical resistance at a variety of temperatures so it can be used in many different applications without worrying about degradation over time
  • Its weather resistant properties mean products made from PE can last longer when exposed to harsh elements.

Whether you're looking for an affordable solution or something that will stand up against wear and tear better than other materials, PE offers both affordability and durability. Compared to POM, delrin, and acetal, there are few reasons why you wouldn't choose polyethylene for your next project!

Advantages and Disadvantages

Advantages and Disadvantages

Now that we've explored the cost comparison between POM, delrin, acetal, and polyethylene (PE), let's dive deeper into their advantages and disadvantages.

All four materials come with both benefits and drawbacks depending on their intended use. From a strength standpoint, POM, delrin, and acetal are all quite strong compared to PE. They stand up well to wear-and-tear and function better in high-temperature applications than PE does.

On the other hand, though PE can break more easily than the others when exposed to pressure or impact, it's far cheaper in most cases. In terms of weather resistance, POM offers excellent protection from moisture and humidity while delrin is highly resistant to environmental stress cracking.

Acetal also performs very well against chemicals like fuels or acids, whereas PE has a much lower resistance level in these cases. Overall, each material has its own unique strengths and weaknesses, but none of them is perfect for every situation. It really just depends on what you need them for!

Final Considerations

Before making a decision, consider the advantages and disadvantages of each material in relation to your specific project needs. When choosing between POM, delrin, acetal or polyethylene (PE) for your project, here are 4 key points to keep in mind:

  1. POM is strong and durable but tends to be more expensive than other materials.
  2. Delrin is resistant to corrosion and heat but can become brittle at low temperatures.
  3. Acetal is lightweight yet rigid and offers excellent wear resistance but can degrade with exposure to UV light.
  4. PE is affordable and very versatile but may not be able to withstand high temperatures or pressures.

Ultimately, the best material for your project depends on its purpose and budget constraints. So, take the time to research all of these materials thoroughly before making a selection! With careful consideration, you can find the perfect material that will give you the best results while staying within your budget.


We've explored the similarities and differences between POM/Delrin/Acetal and polyethylene (PE). We can see that while both materials have different strengths and weaknesses, they also share many similarities.

They are both strong, reliable materials that can be used in a variety of applications. The cost comparison is also important to consider when making a decision about which material to use.

At the end of the day, it all boils down to what your specific needs are for your project or application. Is strength more important than cost? Or vice versa? Whichever material you choose, make sure it fits your budget and meets your goals.