When it comes to manufacturing or material use, there are times when just a single material might not necessarily cut it. Manufacturing trends have shifted a lot in recent times, and this also means that needs and requirements have changed along with them. So, if you have just a single material, it’s possible that you might find it woefully inadequate to meet your needs.
In instances like this, advancements in technology have brought us some interesting options. And, one of them is the possibility of blending materials together. Today, blends of nitrile rubber and PVC provide optimal functionality for several uses.
In this article, we’ll explore the mix of these two materials, as well as how the blend that you get can be used across different industries.
The Materials Used In Nitrile/PVC Resin Blends
When it comes to material blends, you’re essentially playing in a different field. These resins tend to take the best of two or more materials, and that’s exactly what we have with the nitrile/PVC resin blend.
Nitrile/PVC Resin Blends: Definition and Composition
So, what is the nitrile/PVC resin blend? Well, the name pretty much says it all – this blend takes a mixture of nitrile rubber (or “NBR,” for those who might know the official term) and polyvinyl chloride (or “PVC”).
For a quick background, nitrile rubber is a synthetic rubber that is made by mixing acrylonitrile and butadiene. On the other hand, PVC is a thermoplastic polymer that is obtained from the combination of several monomers of vinyl chloride. So, that’s how this resin blend is made – by combining both materials to form something stable.
As you would imagine, the entire point of combining these materials is to create something that can benefit from a mixture of both materials’ properties. We’ll look at these properties in a later section, but remember that their combination is what makes the nitrile/PVC resin blend especially functional.
In terms of chemical structures, you should note that the unique representation of the nitrile/PVC resin blend doesn’t necessarily represent a standalone compound with its own chemical formula. Instead, it represents the amalgamation of two distinct polymers – NBR and PVC.
On their own, each of these polymers comes with its own chemical structure.
With its components of acrylonitrile and butadiene, this polymer has a varying number of possible Nitrile structures. Each of them will vary based on your combination of the monomers themselves. Nevertheless, a possible example of this chemical Nitrile structure is this:
Next, we have the PVC material. Gotten from monomers of vinyl chloride, this material has a repeating unit that contains chlorine atoms and which offers several critical chemical properties.
A typical repeating unit of PVC can look something like this:
So, what is Nitrile/PVC resin if it were to be represented in a chemical formula?
Now, it is worth noting that a blend between the PVC and nitrile rubber polymers won’t result in a chemical Nitrile reaction. Still, the blend that you get will combine the properties of both. So, the properties that you get will mostly vary based on the ratio of PVC to NBR that you get – as well as your chosen blending method.
Just well, another major reason why there’s not much of a chemical structure here is because a “resin blend” doesn’t actually denote a chemical reaction. Instead, it is more of a mechanical or physical Nitrile reaction that results in the formation of a whole new compound. So, the properties of the compound you get will be based on the properties of the physical components itself and the properties that they hold.
What Makes NBR/PVC Resin Blends Unique?
So, we’ve looked at the materials that make up this material. Now, let’s examine what makes it unique and how it operates. Because of its unique formulation, many of these properties tend to be a bit approximated. Nevertheless, you can find the following:
The Physical Properties Of The Nitrile/PVC Resin Blends
A Flexible, Stretchable Materials
To begin with, this material does quite well when it comes to stretching. With the presence of the primary nitrile rubber blend, it is very flexible, and it works where you need proper pliability.
It Resists Oil Materials
Another consequence of the NBR component is the fact that this blend does quite well to resist different types of oils. And, this factor wasn’t forgotten when the two polymers were mixed. If you need something that resists hydrocarbons and oils, then this is a solid option.
Deferring Chemical Entrance
This is a perfect example of a property that comes as a result of the two major components. You see, both PVC and NBR have impressive levels of chemical resistance. As a result, a blend of the two materials is sure to have this property too.
It Lasts Quite a Long
With the two main polymers exhibiting impressive durability, this is another factor that easily shines when you look into this blend. Whenever you need a robust material, you can always call on the nitrile/PVC resin blend.
Additional Resistance Profiles
Besides chemicals and oils, this resin blend also does well to keep flame and elements of weather out. Now, it is worth noting that the flame resistance tends to depend on the mixture’s specifics – PVC is very flame-resistant, so if it is the dominant material here, then there’s a probability that the resin blend you get will resist flames as well.
The Material Is Quite Strong
On its own, the nitrile/PVC resin blend exhibits impressive strength levels. Both its hardness and tensile strength are noteworthy, although you can always adjust the formulations to determine the overall strength profile that you’ll get.
Checking Out The Blend’s Chemical Properties
Next, let’s take a quick look at the chemical properties that you can hope to get from this blend.
Both Materials Blend Well
First, let’s consider the fact that both NBR and PVC are very compatible. The blend that you get from the two materials is very homogenous, and this means that mixing them together is relatively easy. That said, you also need to make sure that the processing conditions and formulations are right if you hope to achieve a seamless blend overall.
Examining Its Resistance Profiles
Next, let’s look at how well the material does to resist other impurities and additional possible contaminants.
- Chemical Resistance: First, consider the fact that this blend does well to resist chemicals. As you would expect, this is because both the materials that make it up also perform well when it comes to chemical resistance.
- Heat Resistance: Overall, the NBR/PVC blend is pretty solid when it comes to temperature stability. Particularly, PVC helps to resist any temperature fluctuations, ensuring that you can easily use it in elevated temperatures.
- Oil Resistance: Finally, this blend also resists oils and fuels. So, if you feel like exposure to these materials might be an issue, rest assured that you’re more than fine.
With all this in mind, you need to consider the fact that the specific properties of this blend can easily be adjusted to fit specific applications. And, these characteristics can also be unique based on what you plan to use the blend for. So, a lot of care needs to be taken if you hope to achieve perfection overall.
What Is The Use Of NBR/PVC?
With a perfect knowledge of what this material does and what makes it unique, let’s look at a few things you can use it for if you’re really looking for a flexible and versatile material to service your needs:
Developing Seals & Gaskets
This is pretty much the most prominent use of any rubber material. And as you can imagine, the NBR/PVC resin blend also works perfectly here. By combining NBR’s ability to resist oils and the weather resistance of PVC, this blend works for creating gaskets and seals that work across different industries.
Of course, these gaskets and seals can be used across different industries – ranging from construction to consumer goods to oil and gas to much more. As long as they are required, you can rest assured that this material is perfect for meeting your needs.
Tubes & Hoses For Machines
It’s almost impossible to come across a hose or tube that doesn’t require resistance to chemicals and fuels. Well, the NBR/PVC resin provides this functionality perfectly and as such, is a proper candidate for making these materials.
Safety Industrial Equipment
One of the most underrated functionalities of this resin is that it also helps with making protective clothing for industrial applications. Making these clothes will require a significant amount of material resistance, and as we already showed, the NBR/PVC resin blend showcases these properties perfectly.
Belts For Industrial Purposes
With its flexibility and durability, the NBR/PVC blend also works for making different types of industrial belts.
Strengthening Cables & Wires
With an intricate combination of material resistance and operational flexibility, the NBR/PVC blend works perfectly as a component in installing cables and wires. Its inclusion ensures that these materials will be able to ensure proper electrical insulation – a factor that allows them to be more functional in whatever industry they are needed.
Use On Ships & Offshore Vessels
An impressive level of weathering resistance ensures that the NBR/PVC blend is able to properly serve as a protective component in the marine industry. Wherever you need a material that protects against weather elements, this blend is there to serve.
Properties To Improve Sporting Performance
Systems that handle fluid and air need proper durability and flexibility, as well as a resistance to chemicals and oils. Fortunately, all of these features are available in the NBR/PVC blend.
Equipment for Sportsmen
You can find this blend working in the development of sporting goods like inflatable products. As you would imagine, these goods need to be flexible and resist any outdoor environmental components. So, NBR/PVC resin blends work perfectly here.
When using the NBR/PVC resin blend, it is once again important to watch out for formulation adjustments and the possible impacts that they might have on your application. You can customize your blend to better fit your application, and this will help ensure that you get the perfect use.
How NBR & PVC Come Together
Generally, material manufacturing is a relatively easy process in this industry. But, things also tend to take a bit of a turn when you’re considering amalgamations like this. PVC and NBr are two materials that require a complex manufacturing process on their own, and you can imagine what is would mean if you were to combine them.
Nevertheless, the process is workable, and this is how you can go about it.
Begin By Preparing Your Raw Materials
First, you have to get high-quality NBR and PVC materials. Your suppliers need to be reputable, and you need to also ensure that the raw materials are completely free of any impurities.
Compound Your Materials Into One
The next step will be to weigh and measure the raw materials to ensure that they fit into your desired overall formulation. A compounding mixer will help with this, and you can also add agents like stabilizers and plasticizers to help you ensure that you get the right properties.
Follow This Up By Mixing
Next, you mix the ingredients into a single batch. Just as you have with silicone compounding, this process takes the raw materials through different passes across your compounding equipment to get that consistent distribution of PVC and NBR – and other possible additives that might have been part of the entire process.
Material Extrusion To Create The Final Form
Once compounding is done, you can extrude the blended material in a continuous form – this could be a pellet, a sheet, etc. The process of extrusion helps you to achieve a more homogenous mix, and it allows you to better shape it into a form that is more ideal for downstream processing.
If You Want, Cool It Off & Pelletize It
If your extrusion leads to the formation of sheets, then you can cool it off and cut it into pellets. This way, it will be much easier for you to handle and to even store it. And if you have additional processing steps, pelletization easily allows you to seamlessly handle the material itself.
Form & Mold Your Material
If you’re not satisfied with the processing steps, you can add a few more with the right molding techniques. Injection molding, compression molding and more can easily be implemented based on what you’d like to use the resin for.
Cure & Vulcanize To Solidify Your Properties
This step might not be necessary. Butl, for specific formulation requirements, you might need to cure and vulcanize the NBR/PVC blend to help it achieve your final property requirements. With these steps, you essentially add a little layer of heat and pressure to crosslink your polymer chain and bolster its properties. But, remember that they aren’t necessary.
Check It One Final Time
Manufacturing processes require proper quality control checks. So, don’t relent on this. Ensure that your product is checked well through proper quality control and ensure that your final product easily meets your needs. If there’s a need to switch things up, don’t be afraid to do so.
Pack It Up & Send It Out
Your material is ready to be shipped out, so don’t delay. Place it in the right containers for transportation and storage, label it right, and send it out to either product manufacturers or the end users.
Nitrile/PVC Resin Blends: Their Advantages & Disadvantages
It’s easy to believe that NBR/PVC resin blends are the most functional materials in the world. And, in more ways than one, they definitely provide a lot of functionality. But, this isn’t to say that they don;t have their own shortcomings.
In this section, we’ll provide a quick breakdown of the benefits and demerits that this material can have, as well as how these might play when it comes to its overall functionality.
The Successes Of The Resin Blend
You Can Resist A Lot Of Things
Easily the most prominent benefit that you stand to gain from this material is that it allows you to hold off on several things. These include:
- Chemicals & Oils: With nitrile rubber being a major contributor here, you can count on this blend to easily hold off against both chemicals and oils. As such, the blend works well in situations where you might find that exposure to these substances is a bit of a challenge.
- Weather Elements: Next, you can count on an NBR/PVC blend to work in outdoor situations since it contains PVC – a material that notoriously resists weathering elements.
- Fire & Flames: PVC is known to resist flames. And, it carries that benefit into the NBR/PVC resin blend, allowing it to easily work in certain safety-focused areas.
The Material Stretches Easily
Both PVC and NBR are known to exhibit impressive levels of flexibility. Since they blend their properties to create the NBR/PVC mix, you can rest assured that it will be flexible as well.
It’s Hard & Tough
NBR/PVC blends are also known to be tough. They soak in a considerable amount of impact, and this means that they easily work for several industrial functions.
You Can Save Money With It Too
Another highly underrated benefit of the NBR/PVC blend is that it is quite affordable. Instead of getting both materials individually, getting them in a blend allows you to save a considerable amount of money overall.
Where The Blend Falls Short
With all its benefits, a regular NBR/PVC blend also has a few shortcomings that need to be highlighted. These include some of the following:
It Can Get Sensitive To Cold
There’s a tendency for this blend to get a bit sensitive when the temperatures drop to extremely low levels. You might want to keep an eye out for that.
Performance In Heat Is Also Limited
These blends might also be a bit limited when it comes to high-temperature applications. When compared to some other materials, you might find them a little inadequate.
They Don’t Necessarily Work Well For The Environment
If you’re an eco-conscious manufacturer, then working with the NBR/PVC blend might not appeal to you so much. With the blend being related to environmental concerns such as the release of chlorine gas in the event of a fire breakout.
This is one of the major reasons why you want to keep an eye out for it.
You Have To Be Particular About Formulations
Overall, you need to keep a close eye on the blend and its formulation to be able to ensure that it truly works for your specific applications. Remember – in some cases, you might find other materials that work better.
Nitrile/PVC Resin Blends: Are They The Best Polymers?
Now that we understand how a nitrile group can combine with PVC rubber to create this seamless blend, there is also the question of whether this amalgamated material is truly the best around.
Primarily, many have been asking what if you get a nitrile/PVC resin blend and stack it up against regular nitrile groups or just PVC? Will it really do better? Well, let’s find out:
Nitrile/PVC Resin Blends vs Nitrile Rubber (NBR)
To get us started, let’s compare this resin blend with the nitrile rubber material itself.
|Made of Nitrile groups and PVC material
|A Copolymer that combines butadiene and acrylonitrile
|None. Both materials are very distinct and unique in their composition
|Good flexibility – and it maintains this across a broad temperature spectrum
|Might not be so great at extremes – especially when things are cold
|A much broader operational temperature range
|Quite solid overall, meaning that it can take a punch
|Also good, easily withstanding wear
|Stalemate. Both are level in this regard
|Naturally does well with flame resistance, but only because it has PVC content
|Doesn’t have much in terms of this, so additional formulations might be required.
|Does well with this – once again, a direct consequence of the PVC content
|Generally no resistance to UV light. Prolonged exposure will affect its build and properties
|General Environmental Impact
|Could have some environmental impacts overall
|Not much of an issue since it does not contain PVC
|You mostly get varied costs since formulations differ
Nitrile/PVC Resin Blend vs PVC
Now, for the other end of the spectrum. PVC is a wildly popular material, and, understandably, you might want to think of it as a possible replacement for the Nitrile/PVC resin blend. But, does it work instead? Let’s see how it stacks up:
|Made of a mix of Nitrile rubber and PVC
|Made of vinyl chloride monomers worked into repeating units
|Chemical & Oil Resistance
|Quite good, since both its constituent materials resist them
|Also solid overall
|Quite flexible, with PVC lending a lot of its inherent balance
|A flexible material naturally
|Temperature Operating Range
|Might not be so flexible here – and it especially struggles in the cold
|Broad temperature range, although it also gets affected by extreme cold or heat
|Relatively tough material, holding off against tear and wear
|Resistance to impact is also quite impressive
|Does well here, thanks to PVC in its build
|Does well with flame resistance naturally
|Has a strong level of UV resistance, but the NBR content might affect that
|Does well to resist the sun’s harmful rays overall
|The PVC content can cause some environmental concerns
|Known to not be so eco-friendly overall
|Can be cost-effective, although the NbR content might be an issue
|Pretty cheap and easy to find around
It’s not easy to find a blend of materials that works seamlessly. But, in the case of the NBR/PVC resin blend, you have a rare material here that has managed to work so perfectly across the board.
For developers who would like to learn more or get their hands on this material, Legenday is the right place to be. Reach out to us, and we’ll be able to help you with whatever you need.