HDPE and PP Plastic: What’s the Difference?

When it comes to HDPE and PP plastic, there are a lot of similarities, which makes it easy to confuse the two materials when it’s time for your manufacturing project. However, deciding between HDPE and PP plastics can result in stark differences in your overall end products. For this reason, it’s important to understand what separates HDPE and PP, as well as the inherent benefits each material can bring to your business’s next project.

PP and HDPE plastic symbols


With this in mind, we’re exploring the benefits of both materials, showcasing their specific differences to help you pick the perfect material for your business needs. Take a look:

The Benefits of HDPE Plastic

HDPE water jugs

HDPE, which stands for high-density polyethylene, is a versatile plastic known for its unique benefits. Thanks to the material’s extreme strength, HDPE is commonly used to create containers like milk and water jugs, where a 60g jug can effectively retain over a gallon of liquid without distorting its original shape.

However, HDPE can remain flexible as well. Take for example, plastic bags. Long-lasting, weather resistant, and capable of carrying weight compared to its own, HDPE can be an ideal option for those looking for plastic that can withstand a variety of different stress factors while maintaining its strength—whether rigid or flexible.



HDPE is known for its resistance to mold, mildew and corrosion, which is why it is commonly used for a variety of construction and sanitation applications. Furthermore, it can be molded into virtually any shape while maintaining its lightweight, making it an ideal option when compared to other types of plastic.

The Benefits of PP Plastic

polypropylene plastic strap

PP, which stands for polypropylene plastic, is a type of plastic that is specifically known for its semi-crystalline nature, it can be shaped and formed easy thanks to the material’s low-melt viscosity. Polypropylene is ideal for injection molding–but that isn’t its only use.

Polypropylene plastic can be found in everything from ropes to carpets and clothing. It’s relatively affordable commercial material and offers businesses strong chemical resistance against a broad selection of bases and acids. This means that if the PP needs to be cleaned, it is likely to be resistant to chemical cleaners over longer periods of time than similar plastics–providing easier cleaning and maintenance.

Additionally, PP is a lighter material compared to other types of plastic. This makes it an ideal alternative across a variety of commercial applications, whether businesses are looking for a plastic to create reusable containers or textiles.

Is HDPE or PP the Right Material for My Business?

HDPE plastic and PP plastic both share similar benefits. In addition to being highly malleable, they are relatively impact resistant, meaning strength does not have to be a concern when these plastics are in use. Additionally, both HDPE and PP are considered to be heat-tolerant and low in terms of toxicity to humans. This may be another factor to consider if the plastic is going to be used for items such as food and beverage containers.

Finally, each of these plastics can be recycled, which may be a benefit for environmentally conscious businesses concerned about creating a large number of items for temporary use(e.g., food containers, signage).

In the end, there are several advantages associated with using HDPE and PP that businesses will want to look at before making a final decision. Doing so can ensure that they are making the most of their budget when it comes to investing in a specific variety of plastic.