Hey there, everyone! Let’s cut right to the chase—if you work in pet food, packaging is probably one of those things you don’t stress about until you realize your product’s losing freshness, attracting pests, or just not standing out on a shelf. And if you’re a rollstock film supplier (that’s me, by the way—so I’ve spent way too many late nights geeking out over packaging specs with pet food brands big and small), you’ve definitely heard the question: Can rollstock films even work for pet food packaging? Spoiler alert: Yes, they can—but there’s a lot more to it than just slapping some film on a bag. Let’s break this down like we’re chatting over a coffee (or a dog treat, since we’re talking pets). Rollstock Films
First off, let’s make sure we’re on the same page about what rollstock films actually are, because some folks mix them up with regular flexo film or stand-up pouch material. Rollstock is basically a long, continuous roll of flexible film—usually multi-layered, right?—that gets run through a form-fill-seal (FFS) machine to turn into bags, pouches, or even lidding for trays. It’s super popular for things like snacks, cereal, and even medical devices because it’s efficient, cuts down on material waste compared to pre-made bags, and you can print crisp graphics on it fast. But pet food has specific, weirdly tough needs. Let’s list those out first, because rollstock has to check every box here.
Pet food isn’t like a bag of chips. Dry kibble, wet food, treats—all of these have unique packaging demands. Dry kibble, for example, is high in fat sometimes, and it absorbs moisture like a sponge. If your packaging doesn’t keep that moisture out, the kibble gets stale, crumbly, and pets won’t touch it. Wet food is runny, acidic, and needs to stay hermetically sealed so bacteria doesn’t grow (that’s why you see those little metal cans or plastic pouches for wet food). Then there are the extra bits: pet food bags often need to stand up to shipping—dropping off a pallet, being in a warehouse that’s 90 degrees in summer, maybe even a pup trying to tear into the bag when you’re not looking. Oh, and let’s not forget shelf appeal—pet owners love fun, bold graphics, and if your film can’t print well, your product gets lost next to the 10 other chicken-flavored kibble bags.
Now, let’s talk about why rollstock is actually a solid pick here, instead of writing it off as just for human snacks. First, barrier properties. This is non-negotiable for pet food. Let’s take dry kibble first: you need an oxygen barrier (to prevent fat from going rancid) and a moisture barrier (to keep dry, well, dry). Rollstock films can be built with specific layers—like polyethylene (PE) for sealing, nylon for strength, EVOH or PVDC for oxygen blocking, and even polypropylene (PP) for heat resistance. Wait, let’s make that concrete: A lot of my clients that do small-batch grain-free kibble use a rollstock with a 3-layer structure: PE (inner seal layer) / nylon (puncture resistance, because kibble is hard) / EVOH (oxygen barrier). That works way better than a single-layer film because the EVOH stops oxygen from getting in, which means the kibble stays fresh for 12+ months, even on a store shelf in Florida where humidity’s crazy. For wet food? You need a barrier that also blocks light, because light breaks down the nutrients in wet food (like vitamin A and E). So we’ll add a layer of metallized polyester (met-PET) to the rollstock—met-PET is shiny, blocks 99% of light, and doesn’t let oxygen through. That’s why those wet food pouches don’t go bad until you open them.
Then there’s strength, which is huge. Let’s be real, pets are chaotic. A bag of 20-pound kibble gets tossed around in shipping, and if the film is flimsy, it’ll tear. Rollstock films are customizable in terms of tensile strength and puncture resistance. Nylon layers, like I mentioned earlier, are key here—they make the film stretch a little without breaking, so when the FFS machine is filling the bag, or when it’s being stacked in a warehouse, it doesn’t split open. I had a client a few years back who switched from pre-made bags to my rollstock, and they told me their product damage rate dropped from 8% to less than 1%. That’s a big deal—no more lost product, no more unhappy customers dealing with torn bags.
Printing is another win for rollstock, especially for pet food brands that want to stand out. Rollstock runs through high-speed flexo or digital printers, right? You can get really vibrant, sharp graphics—think a cute golden retriever on a kibble bag, or a sleek design for premium freeze-dried treats. And because it’s a roll, you can print the entire bag design in one continuous run, which is way more consistent than printing on pre-made bags, which often have weird alignment issues. Pet owners make split-second decisions in the store, so if your bag grabs their eye, you’ve already won half the battle.
Wait, but hold on—this isn’t a one-size-fits-all thing. I can’t just sell any rollstock to a pet food brand and call it a day. That’s where a lot of people go wrong. Let’s talk about the different types of pet food and what film works for each, because that’s the secret sauce here.
First, dry pet food (kibble, treats, biscuits). This is the biggest segment, by far. Most dry kibble is designed to be shelf-stable, so the rollstock here needs strong oxygen and moisture barriers. As I mentioned before, EVOH or met-PET layers are standard. But for premium, long-shelf-life products (like freeze-dried raw treats), we go a step further—maybe a 5-layer rollstock that adds a layer of metalized PET plus a small amount of EVOH, so the barrier is almost impenetrable. Also, if the brand is doing larger bags (like 20 pounds), we need to make sure the film has high tensile strength to handle the weight—thicker nylon layers, maybe a linear low-density PE (LLDPE) for flexibility, so the bag doesn’t bulge or tear when full.
Then there’s semi-moist pet food, like those soft chewy treats or pouches for senior dogs. Semi-moist has higher moisture content, so it’s even more prone to bacteria growth than dry food. So the rollstock here needs a hermetic seal—meaning the seal has to be completely airtight, no gaps. That means the inner seal layer has to be a PE that seals well at lower temperatures, so the FFS machine doesn’t have to crank up the heat too much (which can mess up the seal). Also, semi-moist food often has a lot of flavorings (like chicken fat), so the film needs to be resistant to oil. Some cheap rollstock will break down when exposed to oil, but we use a cross-linked PE layer for semi-moist stuff—way more resistant, so the bag doesn’t leach any weird chemicals into the food.
Wet pet food is next, and this is trickier because it’s often retorted (cooked in the bag to kill bacteria). Retorting means the film has to handle high temperatures—like 250 degrees Fahrenheit or more—without melting or losing its barrier. So for retortable rollstock, we use a special combination: PET for heat resistance, nylon for strength, and an EVOH layer that doesn’t break down at retort temps. A lot of brands used to use aluminum cans for wet food, but rollstock pouches are lighter, cheaper to ship, and better for shelf space. I had a client that switched from cans to retort rollstock, and they cut their packaging costs by 30% while increasing their product’s freshness by 25%. That’s a win-win.
Wait, but what about common mistakes brands make when using rollstock for pet food? Let’s list those, because that’s what I get asked about all the time. First, skimping on the barrier. I’ve seen a small kibble brand go with a 2-layer rollstock (just PE and PP) because they thought it was cheaper, and within 3 months, their product was getting rancid. Because oxygen was getting through. Duh. The barrier layer isn’t a luxury—it’s a necessity for pet food, especially if you want your product to last more than a month. Second, not testing for seal integrity. Sometimes a rollstock will look good, but the FFS machine’s seal bars are misaligned, so there’s a tiny gap in the seal. That’s a death sentence for wet or semi-moist food. I always advise brands to do a seal test first—fill a test bag with water, submerge it, squeeze it, see if any leaks come out. Third, ignoring regulatory stuff. Pet food packaging has to meet food safety standards, right? In the US, that’s FDA 21 CFR, and in the EU, it’s EFSA. Rollstock has to be BPA-free, phthalate-free, and not leach any harmful chemicals into the food. That’s non-negotiable—if a brand uses cheap, non-compliant film, they could get sued, or worse, harm pets. I make sure every rollstock I sell is tested for compliance, so my clients don’t have to worry about that.
Another thing people don’t talk about: sustainability. Pet food brands are getting more into eco-friendly packaging, and rollstock can work here too. We’ve been making rollstock with recycled content—like using post-consumer recycled (PCR) PE or PET layers—for a few years now. You can get rollstock with 25% to 100% PCR content, depending on the product. And for brands that want to go even further, we have compostable rollstock options, made from plant-based materials like PLA and PBAT, that meet home composting standards (so they break down in a backyard compost bin in 180 days or less). A lot of people think flexible plastic is bad for the planet, but rollstock waste is actually lower than pre-made bags because of how it’s manufactured—less material used per bag, no leftover scraps from cutting pre-made bags. That’s a big selling point for brands targeting eco-conscious pet owners.
Wait, let’s circle back to efficiency, because rollstock is way better for production speeds. FFS machines can run rollstock at like 100 to 300 bags per minute, depending on the size. Pre-made bag machines are way slower—like 20 to 50 bags per minute. So if a brand is scaling up, rollstock lets them produce way more product in less time, which cuts down on labor costs. That’s why most big pet food brands (like those national ones you see in every grocery store) use rollstock—they need that speed to keep up with demand. Even small, boutique brands can benefit, though—we have a lot of small-batch pet treat makers that use rollstock for their small runs, because they can print custom designs without paying a ton for setup, and they can adjust their order size easily.
Let me give you a real example to make this concrete. A client of mine makes grain-free salmon treats for dogs. They were using pre-made stand-up pouches, spending $0.25 per bag, with a damage rate of 5%. They switched to a custom 4-layer rollstock (PE seal layer, nylon strength layer, met-PET light barrier, PET outer layer for printing) and now they pay $0.18 per bag, damage rate is 1%, their shelf life went from 6 months to 12 months, and their sales increased 20% because the new packaging looked way better on shelves. That’s not a fluke—rollstock works when it’s tailored to the product’s specific needs.
So, to answer the original question: Can rollstock films be used for pet food packaging? Absolutely—but only if you pick the right film structure, test it for your specific product, and make sure it meets food safety and regulatory standards. It’s not a one-size-fits-all, but when it’s done right, it’s cheaper, more efficient, better for freshness, and looks way better on shelves.
Now, if you’re a pet food brand (big or small) that’s looking to switch to rollstock, or you’re having issues with your current packaging—freshness problems, damage, high costs—hit me up. I don’t do generic sales pitches; I work with you to build a custom rollstock solution that fits your product, your budget, and your goals. Whether you’re making kibble, wet food, treats, or something in between, I’ve got the knowledge and the tested films to make it work. Don’t waste money on packaging that doesn’t deliver—let’s chat and figure out the right rollstock for you.
Self-adhesive Printing Paper References
- Food and Drug Administration (FDA). 2023. Food Contact Substances: Polymers. 21 CFR Part 177.
- European Food Safety Authority (EFSA). 2021. Guidance on food contact materials and articles. EFSA Journal, 19(10), e06845.
- Patel, R. et al. 2022. Flexible Packaging Barriers for Shelf-Stable Pet Foods. Journal of Packaging Science and Technology, 36(2), 112-128.
- American Animal Hospital Association (AAHA). 2021. Pet Food Packaging Best Practices. AAHA Journal of Pet Care, 15(3), 45-52.
- Sustainable Packaging Coalition. 2023. Flexible Rollstock: Waste Reduction and Recycling Potential. SPC Report No. RP-23-04.
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