Avient Materials: 7 Questions Every Engineer Should Ask Before Specifying

The Short Version

I've been handling material specification and procurement orders for Avient products for over six years—since mid-2018, to be exact. In that time, I've personally made (and documented) 14 significant specification errors, totaling roughly $47,000 in wasted budget and expedite fees. I now maintain our team's pre-order checklist to prevent anyone else from repeating my embarrassingly expensive mistakes.

Here are the questions I wish someone had answered for me back then.

FAQ: What You Need to Know About Avient Plastics

1. What's the difference between Avient TPE and standard PVC?

This one tripped me up in my first year. I went back and forth between recommending a general-purpose PVC and an Avient TPE for a consumer-goods handle application. I went back and forth for about a week. PVC was cheap and I knew it. But my gut said the application needed better grip and feel.

Here's the practical difference: Avient's TPE compounds offer a softer, more rubber-like touch without the plasticizer migration issues common in flexible PVC. If your product involves prolonged skin contact or needs to meet automotive fogging standards, TPE is usually the better call. For a simple cable jacket in a controlled environment? PVC works fine, and it's about 20-30% cheaper depending on volume. Simple as that.

To be fair, the cost difference can be significant on larger runs. But I've seen projects blow budgets on re-tooling because they didn't factor in the TPE's lower specific gravity giving more parts per kilogram. That offsets some of the upfront material cost. Look at the total system cost, not just the per-pound price.

2. What does "plastic 5 PP" mean, and why should I care?

You've probably seen the chasing arrows symbol with a "5" in it. That's polypropylene (PP). I once assumed all PP was the same for a food-container project. That was a mistake that cost about $1,200 in rework.

Plastic #5 indicates PP, but that's just the starting point. Avient supplies multiple grades: homopolymer for stiffness, copolymer for impact resistance, and random copolymer for clarity in food packaging. Specifying "PP" on a drawing is like ordering "a vehicle" for a construction site—you might get a bicycle when you needed a dump truck.

Looking back, I should have specified the exact melt flow rate and impact requirements upfront. At the time, I thought "PP is PP." It's not. Check your supplier's data sheets for the specific Avient grade code—that number matters more than the recycling symbol.

3. Are thermoplastic polyurethane sheets the right choice for my project?

I get asked about this a lot. TPU sheets offer excellent abrasion resistance and flexibility across a wide temperature range. If you're making protective covers, conveyor belts, or medical bedding, they're a strong candidate.

The most frustrating part of specifying TPU: people assume it's interchangeable with standard polyurethane. It's not. Thermoplastic PU can be processed on conventional injection or extrusion equipment, but it requires careful drying and temperature control. I've seen a $3,000 batch of TPU ruined by running it at standard PUR processing temperatures—the material degraded, and the entire production run went to scrap.

I recommend Avient's TPU grades for applications needing flexibility below -20°C or above 80°C. But if your application is at room temperature and doesn't face abrasion, a standard TPE will give you similar performance at lower cost. No point overspecifying.

4. What exactly is PVC plastic, and when should I avoid it?

PVC is polyvinyl chloride—a versatile, cost-effective commodity plastic. But it's not right for every situation. In 2022, I specified a rigid PVC for a medical device housing. The part looked fine initially. After sterilization, it yellowed and cracked. Straight to the trash. That's when I learned the limits of PVC in high-heat or radiation environments.

Rigid PVC is excellent for pipes, window frames, and electrical enclosures. Flexible PVC works for cables, flooring, and inflatables. But if you need high heat resistance (above 60°C continuous), UV stability for outdoor use, or compliance with strict flame-smoke-toxicity standards, you should explore Avient's specialty grades or consider alternative materials like their TPE or polypropylene compounds.

Honestly, PVC gets a bad rap sometimes. For many applications, it's perfectly functional and cost-effective. The key is knowing where its limits are. If you're not sure, ask for a technical datasheet comparison before you commit.

5. How do I ensure color consistency with Avient colorants?

Color. The bane of my existence in Q3 2021. We ordered a blue masterbatch for a run of 10,000 parts. The first 500 looked great. The next batch from a new production lot? Slightly different hue. The customer noticed. We had to redo the entire order.

Here's what I learned: Avient's color matching is excellent—when you provide the right substrate and let them match to your target. The mistake we made was assuming the same colorant formulation would work identically in two different base resin viscosities. It didn't.

There's something satisfying about getting a perfect color match approval. But the best part of that whole painful experience was systematizing our color specification process. Now, we always supply: - The exact base resin grade - A physical color standard (not just a Pantone number) - The let-down ratio precisely - Any additives in the final compound (UV stabilizers affect color)

Got that checklist? You'll save yourself a lot of headache.

6. Can Avient's solutions really help with sustainability goals?

This is a big question, and I want to be honest about the limitations. Avient has some impressive sustainability initiatives—their post-consumer recycled (PCR) content masterbatches and bio-based TPE grades are genuine innovations. But someone asked me the other day if they could make a 100% biodegradable part that also had a 10-year outdoor lifespan. That's just not realistic today.

Look for their reSound™ and reSound OM product lines for renewable or ocean-bound plastic content. Their specialty colorants can also help reduce waste by enabling thinner-wall molding through better heat stability. But here's the thing: sustainability in plastics is a trade-off. PCR content might reduce virgin material use but can affect impact strength or color consistency. Biobased grades reduce fossil fuel dependence but may cost more and have different processing requirements.

I recommend this for manufacturers who can define their specific sustainability metric—whether it's reduced carbon footprint, recycled content, or material reduction. But if you're looking for a drop-in replacement that costs the same, processes identically, and is infinitely recyclable? That product doesn't exist yet. Anyone who claims otherwise is selling something.

7. What's the fastest way to get help with a material selection?

After 47 weeks of dealing with specification errors (that's 47 potential mistakes caught by our team's checklist in the past 18 months), here's my advice: don't try to figure it out alone.

Avient's technical team is pretty responsive. But I've found the fastest path to a good answer is to have these ready before contacting them: - End-use environment (temperature, chemicals, UV exposure) - Processing method (injection, extrusion, blow molding) - Aesthetic requirements (color, texture, transparency) - Budget and volume

One more thing: if you're a small or medium-sized company, you might feel like you're not a priority customer. I've been there. What works is being specific about your ask. Instead of "what can you do for plastic toys?" try "I need a TPE with Shore A 60 hardness, overmoldable onto PP, food contact compliant for children over 3." That gets you a real answer fast.