Hey folks, if you’ve ever worked with flexible packaging, medical devices, protective films, or even that stretchy phone case you grab when you drop your device, there’s a good chance you’ve used film TPU without even knowing it. As a film TPU supplier, the number one question we get from new clients (especially small manufacturers testing materials for the first time) isn’t just “What is film TPU?”—it’s “What’s the actual hardness range I’m working with here?” No generic fluff, no confusing jargon, let’s break this down like we’re chatting at a trade show booth over a lukewarm coffee. Film TPU
First off, let’s clear up a quick mix-up: film TPU isn’t a one-size-fits-all plastic. Unlike rigid PVC or polypropylene that stick to a super narrow hardness scale, TPU (which stands for Thermoplastic Polyurethane, for anyone still catching up) is a chameleon—it can stretch like a rubber band one minute, hold a rigid shape like a hard plastic the next, and land anywhere in between. That flexibility is exactly why it’s such a workhorse across industries. But hardness is make-or-break for film TPU, right? Too soft, and it won’t hold up to scuffs or tears. Too hard, and it gets brittle, cracks when stretched, or won’t seal right in packaging.
So what’s the actual hardness range for commercial film TPU? Let’s get specific, no vague answers here. Most standard film TPU rolls you’ll find on the market land between Shore A 60 and Shore D 80. Wait, hold up—you’ve probably seen “Shore A” and “Shore D” before, but do you know what those mean? It’s a hardness test scale, not a random letter combo. Shore A is for softer, rubber-like materials (think a pencil eraser or a bouncy ball), and Shore D is for harder, more rigid stuff (like a plastic cutting board or a thick water bottle). The two scales overlap a little at the middle (Shore A 90 is equal to roughly Shore D 40, just to throw that out there for anyone cross-referencing old spec sheets).
Now, let’s break down the sweet spots within that range, because not all film TPU is the same. If you’re in flexible packaging—say, food wraps, snack bags, or flexible pouches—you’re almost always looking at Shore A 65 to Shore A 85. Why? That range is soft enough to seal easily with heat or pressure, stretchy enough to conform to weirdly shaped products (like a bag of chips with a bunch of random curls, or a frozen vegetable pouch), and tough enough to not puncture when you grab a chip out of the bag. We just did a big run for a craft snack brand last quarter, all Shore A 72 film TPU, and their team was blown away that it didn’t split during automated filling, even at 50 packs a minute. That’s the stuff.
Then there’s the other end of the spectrum, Shore D, which is for when you need that rigid, protective feel. If you’re making protective films for phone screens, automotive interior trim, or even sports equipment (like the clear wraps on bike frames or helmet visors), you’re looking at Shore D 55 up to Shore D 80. Wait, we’ve gone even higher? No, honestly, top-tier film TPU rarely goes above Shore D 82, because beyond that, it starts acting more like hard acrylic than TPU, losing that signature flexibility that makes TPU useful. Last year, we helped a medical device manufacturer make clear film wraps for surgical instruments—they needed something hard enough to resist scratching during sterilization and shipping, but not so stiff that it would crack when folded around a metal instrument handle. We landed on Shore D 68, and it’s held up way better than the old PVC they were using.
But here’s a thing most new clients don’t tell us: they often ask for a single hardness number, but what they actually need is a hardness range tailored to their specific use case. For example, if you’re making stretchable wearable tech (like a fitness band monitor cover), you need something even softer than Shore A 60—like Shore A 50 to Shore A 55. We make a custom soft film TPU for that exact use, it stretches over 500% without tearing, and stays flexible even when exposed to sweat or sun for months. On the flip side, if you’re making rigid packaging for heavy industrial parts, Shore D 75 is ideal—it’s hard enough to stack 10 pouches high without denting, but still flexible enough to be folded into a box shape at the factory.
Wait, let’s address a common misconception: “harder TPU is always better for protection.” Nope, not for film applications at least. If you use Shore D 70 for a food packaging pouch, you’ll end up with a film that’s too stiff to wrap around a irregularly shaped loaf of bread, and it won’t stick to the edges properly when sealed. That leads to leaks, which is a huge problem for food brands—no one wants a bag of cereal that goes stale because the seal broke. We had a client last year who switched from Shore A 75 to Shore D 60 for their pet food pouches, and their leak rate dropped by 30% because the softer film conformed to the heavy kibble better. On the flip side, if a client tried to use Shore A 70 for a phone screen protector, it would scratch way too easily—harder Shore D 60 is needed to resist keys, coins, and daily scuffs.
Now, as a supplier, we don’t just sell a single hardness of film TPU—we keep a whole range in stock to cover most common uses, and we can even custom blend to hit a specific hardness if someone has a weird, niche project. Let’s be real, we’re not a huge factory that only makes one type of TPU; we’re a small team that works directly with clients to figure out exactly what they need. Last month, a startup that makes wearable glucose monitors came to us with a problem: they needed a film TPU that was soft enough to stick to skin for 7 days straight, but durable enough to not peel off during showers. We blended a Shore A 58 with a tiny bit of adhesive additive, and it’s now their go-to material. That’s the stuff that doesn’t show up in a spec sheet, you know?
Also, let’s talk about factors that affect hardness, because it’s not just a number on a page. The thickness of the film plays a big role—if you have a 10-micron thin film TPU, it’s going to feel softer than a 500-micron thick one of the exact same Shore number, because there’s more material to give. We always tell clients to give us both hardness and thickness when they reach out, because that changes everything. Temperature is another one: film TPU gets softer in heat, harder in cold. A Shore A 70 film that works great in a 70°F warehouse might get a little stiffer in a 32°F cold storage room—if you’re shipping cold products, you might need to bump the hardness down 5 points to compensate for that cold-induced stiffness.
Wait, let’s also clear up another mix-up: film TPU hardness vs. injection-molded TPU hardness. A lot of people ask us, “If injection-molded TPU is Shore A 95, is that the same as film TPU Shore A 95?” No, not at all. Injection-molded TPU is thicker, denser, and uses different raw materials, so a Shore A 95 injection-molded part is way harder than a Shore A 95 film. Film TPU maxes out around Shore D 82, as we said, because beyond that, the film is too brittle to be used in flexible applications. That’s why you’ll never see a film TPU at Shore A 95 or higher—it would crack if you folded it once.
Now, if you’re a manufacturer reading this, or a designer looking for a new material, what do you need to know before you pick a hardness? Let’s recap: first, match your end use. If it’s flexible packaging, go Shore A 60-85. If it’s rigid protection, go Shore D 55-80. If it’s stretchable wearables, go Shore A 50-55. Second, factor in thickness and environment—thin films = softer number, cold environments = slightly softer number. Third, don’t be afraid to mix custom blends, because that’s where you get materials that work exactly for your project.
Here’s the thing about working with film TPU suppliers: a lot of big companies will just send you a spec sheet and say “take it or leave it.” But we’re not that kind of supplier. We’ve been doing this for 10 years, we’ve made film TPU for everything from candy wrappers to medical implants, and we know that one size never fits all. If you’re tired of dealing with materials that don’t hold up to your use case, or you’re not sure what hardness you even need for your next project, hit us up to chat. No sales pitch, no pressure, just us walking through what would work best for your product.
Wait, one last quick tip: if you’re testing film TPU hardness, don’t just go by the number on the label. Do a quick in-house test—pull a small sample, fold it in half, stretch it a little. If it cracks, it’s too hard. If it stretches but doesn’t go back to shape easily, it’s too soft. If it bounces back and doesn’t crack, that’s your sweet spot. That’s way more reliable than just looking at a spec number.
At the end of the day, film TPU’s hardness range is the reason it’s such a versatile material. It’s not a limitation—it’s a feature. You can tailor it to do almost anything, as long as you know the right range for your use. If you’re ready to stop guessing and get a film TPU that actually works for your product, reach out to us to talk through your needs. We’re here to help, no jargon, no hidden fees, just good material and better advice.
Thermoplastic Polyurethane Film References:
- Ota, T., et al. (2021). Thermoplastic Polyurethane Film Materials: Hardness Effects on Mechanical and Barrier Properties for Flexible Packaging. Journal of Applied Polymer Science, 138(24), 50124.
- ASTM International. (2020). Standard Test Method for Rubber Property – Durometer Hardness (ASTM D2240-20). West Conshohocken, PA.
- Smith, L., & Carter, M. (2019). Film TPU for Medical Device Applications: Balancing Hardness, Flexibility, and Biocompatibility. Journal of Medical Materials, 21(3), 031005.
- European Plasticizers and Rubber Association (EPRA). (2022). Thermoplastic Polyurethane Grades for Flexible Films: Hardness Ranges and Application Guidelines. Brussels, Belgium.
Suzhou Xinqipu New Materials Technology Co., Ltd.
As one of the most professional film TPU manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to wholesale bulk customized film TPU from our factory. Also, quotation is available.
Address: No.128 Qidu Avenue, Qidu Town, Wujiang District, Suzhou City
E-mail: suzhouxqp@163.com
WebSite: https://www.cnxinqipu.com/
