Paper Produce Packaging: ‘An Ecological Disaster’

So instead of PET trays there were pulp trays. Or, fiber-based packaging with or without a plastic mesh. I was at one booth, and I was looking at flat green beans, and I told the exhibitor, “The green beans are flabby, they’re not holding up.” And he said to me, “But, if you go to Europe, France, and the U.K, that’s what consumers want now.” In addition, the EU decided they want the industry to stop using plastic altogether, but it’s not protecting the product. That’s the regulation. That’s the trend. That’s where the market goes. People don’t want to see plastic.

You have said that using paper is nothing but a trend that’s leading to ecological disaster and taking a huge toll on the planet earth. Can you expand on that? What do you mean by an ecological disaster?

Yes. You live in the States, right? And when you go to the grocery store, in some cases, where they help you pack your groceries, they’ll ask if you want them in paper or plastic, right? And if you say paper, they’ll take one paper bag and then they’ll put another paper bag inside the first one. So it’ll be a double paper bag. Then they’ll put your groceries in this double paper bag. Why do they do it? Because the paper bag is not as strong as a plastic bag. So they want to be green, but they don’t want your groceries spilling all over the floor. So the first thing is physics. If you want to have the same strength, the same puncture resistance, you have to use much heavier, much thicker paper compared to plastic.

So that’s one thing. With that goes the volume you’re going to ship.  Let’s say, in a specific-size case, you can fit 2,000 plastic bags. You can only fit one-quarter of that or even one-fifth of that of paper bags in an equivalent-size case, just because of the volume.

The other thing is that when you cut a corrugated box, there are two sheets, and then there is the fluting in the middle. The fluting is recycled paper, and the other sheets are normally virgin kraft liner. Virgin kraft means it’s the first use of this fiber. When you recycle it, you can only use it for the fluting. Why? Because it’s softer, and it absorbs moisture much, much easier. So if you want to go in the direction of packaging that will not be humidity-sucking paper, you’ll have to opt for the kraft liner. Kraft liner is a single-use paper.

So it’s misleading to say that paper is reusable. You can reuse it, but you can’t reuse it for the same purpose. You can reuse it maybe for books or for newspapers or for egg trays, but you can’t use it for the same purpose. You can’t take a paper bag that was used for fresh produce and make a paper bag again that will be as strong as the original one to be used for the same purpose.

The third issue is with the condition of the produce itself, mostly of fresh produce. If it doesn’t have a specific peel that will resist dehydration, it tends to lose moisture. We’ve done some research on green beans grown in Mexico, shipping them to Canada, and we saw that in order to compensate for the weight loss along the journey, the growers have to pack 10% more product.

Meaning that over the journey of five days from Mexico to Canada, the produce loses about 10% of its weight. So, since the retailers in Canada dictate that they want 30-pound crates, and they’re going to fine the grower if it’s underweight, the grower will overpack it with some extra in order to compensate for that loss.

The loss from moisture?

Mainly from moisture. That’s one major element. I’m calling it the silent thief that steals revenue from the store. Because even produce on the shelf gets dehydrated. And when a retailer buys say 30 pounds of cucumbers, even if they sell everything and nothing goes to waste, they’ll find they only sold 28 pounds. Why? Because two pounds evaporated. When produce loses about 2% of its weight, it becomes soft. And people don’t like to buy soft fruit. Soft, flabby vegetables are especially not wanted—not lettuce, not green beans, not cucumbers, not carrots. If it’s flabby, it’s going to be left on the shelf. So that by itself increases waste because people are not going to purchase it.

A test of lychee fruit in a PET tray versus a molded pulp package demonstrates how the porous nature of fiber-based packaging leads to the growth pathogens that then affect the fruit.We were doing research the other day on lychee [fruit] in Israel. The company wanted to switch from PET trays to pulp-based trays. What we’ve seen is that the pulp oftentimes gets pathogens in it. Fungal spores rest there and stay. Then when you pack the product, it affects the produce within. Plastic doesn’t have a porous surface. Normally the lychee comes from high-temperature production and then wrapped in a large plastic bag and put into a massive carton. The fiber-based packaging is very porous. This makes it very easy for the fiber to absorb or make space for pathogens to rest and proliferate.

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These are several reasons why moving to paper-based packaging for produce is going to be a disaster. Now also, if you look at the production of paper versus the production of plastics, the production of paper is lengthy and consumes a lot more energy. So let’s say from delivering the wood from wherever it is, to the wood processing facility, and to extract the cellulose, and then turn it into paper, a lot of water is consumed. It’s also a high-energy process versus the production of plastics. So combine all these together, and paper-based packaging is going to take a lot higher toll on planet Earth compared to plastics.

If, by using paper for produce packaging, you’re wasting product, then plastic appears to be the better choice. Yet, the perception by consumers is that paper is more environmentally friendly.

Perception is horrible because we can’t argue with perception. You see it, and it looks fresh, or you see it, and it looks green, and that’s it. And you don’t have to say a word. And then you see the islands of plastic in the ocean or plastic rolling onto beaches, and say no more. Now plastics have to explain themselves and have to go through a lengthy interview and explanations. But paper, you see it and it’s green and it’s wood—it’s plants. It’s so easy to understand why it’s better for the environment

In some cases, paper actually may be the better choice, depending on the product. But in the case of produce, it seems to be defeating the purpose of using the packaging.

There are some produce items that don’t need any packaging, in some cases, paper might be the right solution. But to go across the board and ban plastic and say no more plastic… . I’ve been trying to reply to posts on LinkedIn and articles over the years, but it feels like my voice hasn’t been heard. In the U.K., they were saying that packaging was wasteful, and they were dictating to the growers to stop packaging cucumbers, but cucumbers dehydrate so fast. And I said, it’s only going to increase the waste, and it’s going to increase the waste immediately—not tomorrow, not a year from now, but immediately with the next arrival. If it’s not in the right packaging, it’s going to get dehydrated, 2% every day, and the consumer is going to leave it on the shelf.

Are you seeing other trends in produce packaging, or is the trend really just toward paper?

The change is mainly toward paper, and that was very significant at Fruit Logistica. With that being said, there is one particular machine by a Dutch company called BrimaPack. The owner started the company almost 20 years ago, and year after year, he had the same small booth with one machine. Over the last few years, however, it seems that growers and large shippers have begun to appreciate the benefit of his equipment. It uses a very fine film of about 12 to 15 microns. In terms of mils, I think it’s maybe 0.6, 0.5 mil. It wraps around the product with a very minimal surface area of plastic and creates a heat-seal knot at the bottom of the produce. It’s mainly used for round vegetables, such as iceberg lettuce or cauliflower or broccoli.

Round produce, such as iceburg lettuce, broccoli, or cauliflower, packed using BrimaPack’s system uses 40% less plastic without compromising the freshness of the product.It’s only this year or last year that U.S.-based companies started using it. Only with that can you reduce about 40% of plastics, and that’s the direction the market should go—to reduce plastic, but reduce it while not compromising the product itself.

What do you think about materials such as bio-based or compostable plastics for produce?

That was a trend maybe 10 years ago, when people were looking to replace plastics. One product they looked at was PLA [polylactic acid], which is derived from corn or sugarcane or sugar beet pulp or cassava. The material is clear, it looks like a bag, and it performs like bag. But there were several issues around it. First, because it’s made of a feedstock used for human consumption like corn, it drives the price of corn higher. The other thing is that its weight per volume is about 20% to 40% higher than for the equivalent polypropylene or polyethylene bag.

The other issue is that it’s very susceptible to heat and exposure to UV light, so it deforms very easily. We tried using it as a substitute for trays in Mexico, and if the trays were kept in storage exposed to the sun, not even direct sunlight, but just under the shade where the temperature rises, they deformed over time. So for that reason, and also for the price difference, people are not adopting it. People talk about PLA here and there, but it never catches on.

There is an Israeli company that is using something similar to PLA. I had some experience with this material, and normally it’s thicker, it’s cloudier, so a hazy or a milky color and a lot more pricey than alternative plastics. So again, it’s only for particular applications where people are willing to pay more for the packaging or are willing to compromise on the presentation, because it’s not as clear, and you can’t really see the produce within. But people are really keen to see what they’re buying.

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That’s another reason, by the way, that paper-based packaging is also problematic because you can’t see the product inside. That’s why the some of the paper packaging includes a window with plastic mesh so you can kind of see what’s in the bag, but it’s very likely that people will either care and will check or won’t buy it.

If you were advising produce packagers or any food or beverage company that is thinking about switching from plastic to another material that consumers perceive as more sustainable, what would you say?

The first thing is to work with professionals who specialize in this area. Find out what’s best for the product. We’re investing a lot of effort and money and energy and enthusiasm into growing the best produce. And then, by the same token, we have a post-harvest specialists who know exactly what packaging is most suitable for the product. So work with the professionals and with the companies that specialize in developing and producing packaging that is most suitable for the product. The other thing is to look for the packaging that best fits the product in terms of size and protection.

Mini, or Persian, cucumbers may be more attractive in a heavy-gauge plastic bag with graphics, but, according to Zeltzer, the large amount of plastic used isn’t necessary to keep the products fresh. In addition the use of graphics adds chemicals in the form of ink, while complex closures may hinder the recyclability of the packaging.In many cases, if you go to, for example, Costco, you’ll see that mini cucumbers or Persian cucumbers will be packed in a high-gauge, plastic bag with a slider or zip lock. And it’s not really necessary. They also use very fancy graphics. I can’t argue with the graphics, the bag really looks beautiful. But first, there is a lot of ink, a lot of chemicals in the packaging. In addition, the high-gauge plastic bag is not necessary. The slider is nice to have, but it’s another material that makes it more complicated to recycle and increases the price of the packaging. So select the simpler, less expensive packaging solution. As conscious consumers, we should opt for packaging that protects the commodity, but not overpackaging.  PW