We've all heard of polypropylene (PP) and the various other types of plastics used in manufacturing, but do know about their differences?

POM, Delrin, and Acetal are all terms we might not be familiar with. In this article, we'll explore the chemical and physical properties of these materials as well as their applications. We'll also look at the advantages and disadvantages associated with each type of plastic.

By understanding the contrasts between POM / Delrin / Acetal vs PP in detail, we can make more informed decisions when it comes to selecting materials for our projects.

So let's dive in and explore what makes these materials unique!

Overview of POM, Delrin, and PP

Let's get to know the key differences between three of the most popular plastics and how they can be used in various applications. POM, also known as Acetal or Delrin, is a semi-crystalline thermoplastic that has excellent mechanical properties and good chemical resistance. It was designed for use in high-performance applications where strength and stiffness are important requirements.

Polypropylene (PP) is another type of plastic with excellent stiffness and chemical resistance, but it doesn't have quite as much strength as POM. Finally, Delrin is a brand name for polyoxymethylene (POM), which is a powerful thermoplastic that has superior wear characteristics compared to PP and other plastics.

Each of these materials has its own unique strengths and weaknesses, so it's important to consider all of them when choosing the right plastic for an application. With their varied properties, each one can be used in specific applications depending on what it's required to do.

Chemical Properties

Chemical Properties

You can't ignore the chemical properties of these materials - they make all the difference!

POM, Delrin, and PP are all part of a family of thermoplastics known for their high levels of strength and durability. They also share a common chemical makeup; namely, they are polymers made up of long chains of hydrocarbon molecules.

However, each material has its own unique set of characteristics that make it suitable for different applications. For example, POM is highly resistant to wear and tear due to its crystalline structure. Delrin is tougher than other thermoplastics due to its low coefficient of friction. And PP is well-known for its excellent resistance to acids and alkalis.

All in all, choosing between these three materials largely depends on what type of application you need them for – understanding their chemical properties can help you decide which one is best suited for the job!

Physical Properties

We're here to discuss the physical properties of POM/delrin/acetal, polypropylene (PP), and other materials. Specifically, we'll be looking at their density, tensile strength, hardness, thermal, and electrical properties.

To understand these materials better and how they differ from one another in application, let's dive into each property individually.

Density, tensile strength, and hardness

With their varying densities, tensile strengths, and hardness levels, these materials can make all the difference in your project. When it comes to density, POM and delrin are both lightweight plastics with a similar specific gravity of 1.41g/cm³. Acetal is a bit heavier than the two at 1.42g/cm³, whereas polypropylene has a significantly lower density of 0.9g/cm³—making it the lightest plastic of them all.

The tensile strength of each material also varies quite a bit: POM can handle up to 70MPa, Delrin up to 80MPa, acetal up to 90MPa, and polypropylene up to 40MPa. This makes it the weakest in this regard out of all four materials. However, when comparing their hardness levels they are more comparable as they range from 65-80 shore D on the scale. This makes none particularly better at resisting wear than any other one here presented.

In order to decide which material is best for you depending on these physical properties, you need only consider what works best for your particular application or project needs!

Thermal and electrical properties

Comparing the thermal and electrical properties of these materials can provide insight into how they interact in different settings. The main difference between these four materials is their thermal conductivity, with POM/delrin/acetal having higher conductivity than polypropylene (PP).

Additionally, POM/delrin/acetal have high dielectric constants and low breakdown voltages, allowing them to serve as insulators in most electronic applications. Polypropylene, on the other hand, has a higher melting point than POM/delrin/acetal, making it suitable for applications where heat resistance is important.

Moreover, POM/delrin/acetal are more resistant to chemical corrosion than PP, which makes them ideal for use in environments where there may be exposure to corrosive chemicals or liquids. Finally, PP has higher electrical resistivity than POM/delrin/acetal, making it better suited for use as an insulator in certain types of electronic circuits or systems that require low levels of current flow through them.

Ultimately, understanding the differences between these materials' thermal and electrical properties can help you determine which one will be best suited for a particular application or setting. Whether you need something with a high level of insulation or heat resistance, or just want something that won't corrode easily when exposed to harsh conditions - each material offers unique advantages that should be taken into account when making your decision!

Applications of POM

Applications of POM

We love POM! It's high strength-to-weight ratio makes it incredibly versatile and useful for applications that require a lightweight but durable material.

In fact, POM has an impressive tensile strength of up to 80 MPa – making it perfect for applications like precision gears, valves, conveyor systems, automotive components, and medical devices.

With its superior dimensional stability and wear resistance properties, POM is also ideal for parts that require low friction or need to stand up to harsh environments. This means you can enjoy the freedom of utilizing POM in projects where other materials may not be strong enough or flexible enough to withstand the conditions.

Plus, with its excellent chemical resistance capabilities, you can rest assured knowing that your parts will remain safe no matter what type of liquid or gas they come into contact with.

So if you're looking for a reliable and resilient material that can make your projects lighter and stronger at the same time – look no further than POM!

Applications of Delrin

Now, let's take a look at the applications of Delrin. Unlike POM, Delrin has an incredibly low coefficient of friction and is highly resistant to wear and abrasion, making it an ideal material for bearings, gears, and other parts that are subject to sliding motion.

It's also used in items such as electrical insulators, valves, cams, and mechanical components found in the automotive industry. Its superior strength-to-weight ratio makes it a preferred choice for medical equipment like prosthetics or orthotics.

Lastly, its excellent machinability allows for easy fabrication into complex shapes with tight tolerances. All these features make Delrin a versatile polymer with many potential applications!

Applications of PP

Applications of PP

We know that Polypropylene (PP) is a versatile plastic material boasting excellent chemical resistance and durability, making it ideal for a variety of applications. It has many great uses such as:

  • PP containers are lightweight and shatterproof while still providing a high level of protection to their contents, making them popular in the food industry.
  • PP fibers are strong and durable but also flexible enough to be used in clothing and other fabrics.
  • PP pipes are corrosion-resistant which makes them ideal for plumbing needs.

Aside from its practical applications, PP is also known for being economical and environmentally friendly. It's derived from natural gas and petroleum, which makes it easily recyclable without losing any of its properties. This makes it an incredibly sustainable choice when compared to other materials like metals or glass. Moreover, production costs tend to be lower than some of its counterparts due to the availability of raw materials.

All this allows us to enjoy the benefits of using polypropylene with freedom in our minds!

Advantages and Disadvantages of Each Material

You may be wondering how PP compares to other materials like POM, Delrin, and Acetal. All of these materials have their own advantages and disadvantages when being used in certain applications.

Polypropylene is a strong material that can be used for a variety of projects due to its low cost and high chemical resistance. It's also lightweight and easy to work with, making it an ideal choice for many applications.

POM, Delrin, and Acetal are all tougher than PP but they're also more expensive and harder to machine. They have excellent wear resistance, which makes them great for parts that will experience extended periods of use or friction. Acetal is the most resistant to chemicals out of the three materials while POM has superior impact strength compared to the other two materials.

Each material has its own unique properties that make them suitable for different applications, so it's important to consider what you need before selecting one over another.


We've come to the end of our journey exploring POM/delrin/acetal vs polypropylene (PP). With its low cost and high chemical resistance, polypropylene is a great choice for many applications - it's even been used to create parts on the International Space Station!

But when looking at these materials in comparison, each one has unique advantages and disadvantages that make them suitable for different needs. POM/delrin/acetal are all good options for parts that need extra strength or when there are higher heat requirements.

On the other hand, pp works better when repelling liquids and chemicals or with tight tolerance requirements. Taking into account all these factors will help you make an informed decision on which material is best suited for your application.

Ultimately, regardless of which option you choose, you can trust that you've made a strong choice backed by knowledge and research.