Table of Contents
- What Are EVA Hot Melts?
- What Are APAO Hot Melts?
- Similarities & Differences
- When to Use EVAs Vs. APAOs
- FAQs
While hot melt chemistries often overlap in their performance capabilities and applications, there are important differences that can impact real-world performance. With so many different hot melts on the market, it can be hard to know which is best for your application.
To help, our team reviews the similarities and differences between EVA hot melt adhesives and APAO hot melt adhesives and shares tips on how to choose the right chemistry for your needs.
What Are EVA Hot Melts?
Ethylene vinyl acetate or EVA hot melt adhesives are a chemistry of hot melt that is widely used in packaging and converting applications. The thermoplastic adhesive is comprised of ethylene and vinyl acetate copolymers and offers a fast set time.
EVA glue is so popular because it can bond to a diverse range of substrates, has a wide temperature range, and is often a more cost-effective option compared to other chemistries of hot melt. To add to their diversity, EVA-based hot melt adhesives can be formulated for specific performance capabilities like freezer-grade adhesion or the ability to bond to different coatings.
Explore our collection of EVA pellets, pillows, and other bulk forms.
What Are APAO Hot Melts?
Amorphous poly alpha olefin or APAO hot melts are a high-performance adhesive formulated from olefin polymers. APAO hot melts adhesives offer a high resistance to moisture, oils, and chemicals. They also tend to have a higher heat resistance than EVA hot melts.
In terms of application, APAO hot glues often have longer open times and can be dispensed as a bead or a spray. Compared to other hot melt chemistries, APAOs also tend to have cleaner machining. They are a popular choice of adhesive for the packaging, automotive, furniture manufacturing, and electronics industries.
Explore our collection of bulk APAO hot melt adhesives.
What Are the Similarities & Differences Between EVA and APAO Hot Melt Adhesives?
EVAs and APAOs are both hot melt adhesives with similar properties and uses, but they also have unique specifications that can impact which one you need. Our team outlines some of the key similarities and differences between EVA hot melts and APAO hot melt adhesives below.
| Property | EVA Hot Melt Adhesives | APAO Adhesives |
|---|---|---|
| Adhesive Type | Thermoplastic hot melt adhesive | Thermoplastic hot melt adhesive |
| Heat Resistance | Moderate heat resistance | Better heat resistance |
| Cold Temperature Performance | May become brittle in very cold environments | Higher flexibility and toughness at cold temperatures |
| Chemical Resistance | Good resistance to moisture and some chemicals | Excellent resistance to chemicals, oil, and moisture |
| Open Time | Faster open times | Longer open times |
| Set Speed | Fast | Moderate to fast |
| Flexibility | Moderate | Higher flexibility and elongation |
| Thermal Stability | Good | Excellent |
| Equipment Maintenance | May produce more char buildup over time | Clean machining; may reduce risk of char |
| Cost | Generally cost-effective | Generally higher cost |
While this chart compares EVAs and APAO hot melt adhesives in general terms, these properties can vary greatly depending on the specific product and operating conditions. Both adhesive chemistries can be formulated to meet specific performance requirements, including different open times, set speeds, viscosities, and more. It is important to review a product’s technical datasheet before purchasing.
When to Use EVAs Vs. APAOs
While you may have a better understanding of the differences between EVAs and APAO hot glues, we know that there is still a lot to think about when making a selection. Before deciding between the two, we suggest you consider the following:
- Substrates and product design
- Environmental conditions (temperature range, moisture content, chemical exposure, etc.)
- Open time
- Production process and plant conditions
- Equipment and equipment maintenance
- Total cost in use
With these factors in mind, you can more confidently choose between APAO and EVA hot melt adhesives.
You should probably choose an EVA hot melt over an APAO adhesive when:
- A fast set time is required
- Environmental conditions are relatively moderate
- Cost is a primary concern
You should probably choose an APAO hot melt over an EVA adhesive when:
- The application will be exposed to higher temperatures
- Chemical exposure is a concern
- The bond may be exposed to colder temperatures
- You require a longer open time
- Greater bond flexibility is needed
- Reduced equipment maintenance is a desire, or charring has been a frequent issue
Ready to Make a Selection?
Now that you have an outline of the similarities and differences between EVA and APAO hot melt adhesives, you should have an easier time choosing which chemistry is best for your application.
You can browse our collections of EVA adhesives or APAO hot melt adhesives for sale to narrow down your choices. Because it all comes down to the specific product, you can also reach out to our team for assistance. With over 50 years of experience in the hot melt adhesive industry, we can help you find the best product for your unique application.
