Working daily with NBR compounds at Hairui's rubber foam factory here in China, we've seen significant developments in PVC-NBR (Polyvinyl Chloride-Nitrile Butadiene Rubber) blends over the years. While many manufacturers struggle with blend optimization, our technical team has spent countless hours perfecting these materials. Here's what we've learned about these unique thermoplastic elastomers.
Look at most polymer blends under a microscope, and you'll see distinct phases. PVC-NBR is different. These blends show a single-phase structure that's pretty rare in the polymer world. We've tested numerous samples in our lab at hairuirubber.com, and this unique characteristic consistently shows up in our analysis.
Most elastomer blends separate like oil and water. Not PVC-NBR. The material forms one unified phase, which explains why it processes so differently from standard TPEs. In our production facility, this means we can achieve better consistency and fewer defects.
The nitrile groups in NBR and chlorine atoms in PVC actually like each other - chemically speaking. They form strong intermolecular bonds that keep the blend stable. We've seen this stability firsthand when running high-temperature tests in our lab.
In our rubber foam factory, we run these blends through standard extruders and injection molding machines. They handle multiple processing cycles well - something that saves both time and material costs. But watch your processing temperatures - we've found that staying below 180°C usually gives the best results.
Getting vulcanization right can be tricky. Through trial and error, we've learned that shear rate matters more than most people think. Our operators typically start with lower speeds and adjust based on material response.
These blends bounce back - literally. We've run long-term compression set tests that show remarkable recovery properties. One automotive client switched to our NBR foam supplier services after their previous material kept taking permanent sets.
Our testing shows solid resistance to:
Real-world data from our customers backs this up. We had a wire manufacturer report zero degradation after 18 months of field exposure.
Finding the sweet spot between rigidity and flexibility is tough. Our foam rubber manufacturer experience shows PVC-NBR blends hit this balance well.
The wire and cable folks love this stuff. It works great for jacketing and insulation. One of our regular customers runs these materials at speeds up to 200 meters per minute without issues.
Automotive Uses
Car parts take a beating. That's why several major automotive suppliers source their NBR rubber from Hairui Rubber. These materials handle under-hood temperatures and constant oil exposure without breaking a sweat.
General Industrial Uses
Our rubber foam factory regularly supplies materials for:
Nano-Materials Integration
Hairui and our R&D partners are currently testing nano-clay additions to these blends. Early results look promising - better barrier properties without sacrificing flexibility. But there's still work to do on dispersion techniques.
Green Manufacturing Steps
Environmental concerns matter. We're working on:
Pushing Performance Boundaries
Our lab never stops testing. Current focus areas:
After years as a foam rubber supplier and manufacturer, we know these materials inside and out. PVC-NBR blends solve real problems in demanding applications. They're not perfect for everything - no material is - but when you need that specific combination of processability and performance, they're hard to beat.
The single-phase nature of these blends gives them unique advantages. At Hairui Rubber, we've optimized our production processes to make the most of these characteristics. Every batch we produce goes through rigorous testing to ensure it meets both our standards and your specifications.
Hairui Insulation represents China's growing presence in the global insulation manufacturing sector. As an ISO 9001:2015 certified manufacturer, Hairui demonstrates commitment to international quality standards in their production processes. Our manufacturing facility specializes in diverse insulation solutions, including technical products such as closed-cell polyethylene foam, rubber-based materials, NBR, EPDM, EVA insulation products, as well as traditional insulation solutions such as glass wool and ceremic wool.
Need help figuring out if PVC-NBR blends fit your application? Our technical team deals with these materials every day. Drop us a line here - we're always happy to share what we've learned over the years.
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