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        Sustainability

        Adhesives in the Bindery: Environmental Impact

        May 1, 2010

        by: Ken Kroeger, PH.D., L.D. Davis Industries, Inc.

        The Cuyahoga River in Northeastern Ohio was ignited by a spark in 1969. The fact that there was so much oil-soaked debris and sludge floating on the river to sustain a fire was an environmental wake-up call for the American people. Many cite the fire as an impetus for the formation of the Environmental Protection Agency in 1970 and the passage of the Clean Water Act in 1972. These events helped lead adhesive manufacturers away from solvent-based adhesives (adhesive polymers dissolved in organic solvents) and accelerated the development of water-based adhesives that could perform similarly. In terms of reducing the environmental impact of adhesives, this has been the most significant development in adhesive technology. The blaze on the river 41 years ago has led to the situation today in which adhesives have a relatively mild impact on the environment.

        In this second installment of the two-part series about adhesives in the bindery, the environmental impacts of animal glue, resin emulsion, and hot melt adhesives will be compared and contrasted. Keep in mind the overall perspective that all of the adhesives used in the bindery today have a much reduced environmental impact compared to solvent-based adhesives used in decades past. The complete lifecycle of adhesives will be considered: their manufacture from raw materials, use in the bindery, and the post-consumer recycling or disposal of bindery products.

        It’s recommended that you read the first part of this series in the Winter 2010 issue of The Binding Edge since it discusses the nature and composition of these adhesives.

        Animal Glues

        The major raw materials used to manufacture animal glues are technical gelatin, glycerin, Epsom salt, sugars, and water. Technical gelatin is produced industrially by the chemical treatment (hydrolysis) of collagen protein contained in the hides and bones of cattle and pigs. The chemicals used are not environmentally hazardous (usually slaked lime), but gelatin production produces a large amount of waste water that must be treated to reduce the solids content. While the raising of farm animals has a large environmental impact, the main economic drivers of farm animal production are meat and leather production. Therefore, technical gelatin production is only responsible for an extremely small fraction of this environmental impact. Glycerin is produced as a byproduct of cooking oil and soap production. Epsom salt is generally obtained from mines. The sugars used to produce animal glues are produced from corn, a renewable resource. The technical gelatin and Epsom salt are generally obtained overseas, which adds to their carbon footprint.

        The use of recycled materials greatly reduces the environmental impact of animal glue production. The production of pharmaceutical capsules (both hard and softgel capsules) produces a significant amount of gelatin “scrap.” This “scrap,” which contains high-quality pharmaceutical gelatin, can be recycled by using it in place of technical gelatin to produce animal glues. Through contracts with pharmaceutical companies, L.D. Davis Industries uses this “scrap” as the source of approximately 50 percent of the gelatin it uses for animal glue production. This recycling effort saves thousands of metric tons of this “scrap” from reaching landfills every year.

        Animal glues are used in the bindery by applying a moderate heat to maintain the adhesive at 150°F. Animal glues generally contain no volatile organic compounds (VOCs) and clean up easily with water.

        Since even dried animal glues easily disperse in water, they produce absolutely no problem for a repulping process in the recycling of bindery products. In addition, all of the major raw materials used to manufacture animal glues (gelatin, glycerin, Epsom salt, and sugars) are highly biodegradable. When a bindery product ends up in a landfill, the animal glue will biodegrade within weeks of exposure to water.

        Resin Emulsions

        The major raw materials used to manufacture resin emulsion adhesives are polymer emulsions, polyvinyl alcohols, and water. Most of the polymers contained in the emulsions, as well as the polyvinyl alcohols, are ultimately synthesized from acetic acid or ethylene produced in a very energy-intensive process of cracking petroleum. In addition, a large percentage of the petroleum must be shipped from the Middle East, which further increases the carbon footprint. There are no recycled materials used in manufacturing resin emulsions.

        Resin emulsion adhesives are used in the bindery at ambient temperature so no heating energy is used. While resin emulsions generally contain no VOCs, they sometimes require an organic solvent for cleaning.

        Since most dried resin emulsion adhesives will soften and only partially disperse in water, they produce minor problems during the repulping process. Resin emulsions are not biodegradable. While polyvinyl alcohols are biodegradable, the polymer component of the polymer emulsions is not.

        Hot Melts

        The major raw materials used to manufacture hot melt adhesives are the base polymer, tackifying resins, and waxes. Most of the base polymers, tackifying resins, and waxes are ultimately synthesized from petroleum using energy-intensive processes. In addition, a large percentage of the petroleum must be shipped from the Middle East, which further increases the carbon footprint. Generally, there are no recycled materials used in manufacturing hot melts.

        Hot melt adhesives are used in the bindery by applying a large amount of heat to maintain the adhesive at 350°F. However, there are low-temperature hot melts designed for safety and energy efficiency that can be used as low as 250°F. Hot melts contain low or no VOCs. Since hot melts are not soluble in water, clean-up requires a wax, an organic plasticizer, or an organic solvent.

        Since hot melts will not disperse in water, the presence of hot melts in bindery products seriously affects their recyclability. During the repulping process, the hot melts produce “stickies” that hamper the process. Key to the success of a repulping process is having a method to separate the “stickies” from the pulp to prevent compromising paper pulp quality. In addition, all of the raw materials used to manufacture hot melts (base polymers, tackifying resins, and waxes) are generally inert and, therefore, not biodegradable.

        Conclusion

        This two-part series of articles has described the history, composition, uses, and environmental impact of animal glues, resin emulsions, and hot melts used in the bindery. This second installment has compared and contrasted different aspects of the environmental impact associated with these adhesives.

        The animal glue, resin emulsion, and hot melt adhesives used in the bindery today all have a much reduced environmental impact compared to solvent-based adhesives used in the past. Those solvent-based adhesives had very high VOC content, were not biodegradable and, if discarded into a landfill leaching solvents, would produce toxic soil and ground water contamination.

        Animal glues are the friend of the environment. They are the adhesives of choice when high wet tack is needed and the materials to be bonded are absorbent and relatively easy to bond.

        Resin emulsions are the adhesives of choice when a large amount of wet tack is not needed, the materials to be bonded are absorbent, and the materials are more difficult to bond than what animal glues can handle.

        Hot melts are the adhesives of choice when excellent immediate (green) tack is needed and the materials to be bonded are more difficult to bond than what animal glues can handle.

        Acknowledgement

        The author would like to thank Mark Katsaros of H.B. Fuller Company for his assistance.

        Dr. Ken Kroeger has been the research and development manager for L.D. Davis Industries for the past 13 years and is an adjunct professor of chemistry and physics at Wingate University. He has an undergraduate chemistry degree from the University of Dayton and a Ph.D. in chemistry from the University of Colorado at Boulder. In addition to adhesives, Dr. Kroeger has experience working in the fields of macromolecular X-ray crystallography, atmospheric chemistry, isotope separation, and explosive and pyrotechnic chemistry. L.D. Davis Industries, Inc. is an 84-year-old family-owned company manufacturing both animal glues and resin emulsion adhesives and distributing multiple lines of hot melts for the graphic arts, rigid box, packaging, and other industries. For more information, call (800) 553-3284, email Dr. Kroeger at kkroeger@lddavis.com, or visit www.lddavis.com.

        The ‘Green’ Direction: Binding and Loose Leaf Companies Weigh in on Sustainability

        May 1, 2009

        by: Renée Varella

        Although the “green” phenomenon has not swept binderies or loose leaf manufacturers like it has other industries, several authorities in the field say it is just a matter of time. Reasons for both types of companies to address the sustainability issue range from “It’s the right thing to do for the environment” and “Customers are demanding green options” to “A commitment to sustainability will differentiate your business from the competition” and “It’s an excellent opportunity to find ways to reduce costs and increase productivity.”

        “A focus on sustainability equals a focus on social responsibility, the environment, and the economics of operating our businesses,” noted Kris Bovay, general manager of Pacific Bindery in Vancouver, British Columbia, and board member of the Sustainable Green Printing (SGP) Partnership. “Our customers and our markets are, or soon will be, demanding sustainability commitments. For example, in the province of British Columbia, there is a Sustainability Purchasing Network (www.buysmartbc.com) of large corporate buyers who want to deal only or primarily with sustainable printers and binderies.” Bovay also is a board member and vice chair of the Binding Industries of America (BIA) board of directors.

        Another industry colleague believes sustainability is all about consumers: “The motivating factor for going green is the fact that it’s a customer-driven phenomenon,” said Gary Jones, director of environmental, health, and safety affairs for Printing Industries of America (PIA) in Sewickley, Pa. “We’re in the midst of a fundamental change – and I don’t think it’s going to go away, although it is hard to predict exactly where it’s going. Business has always been about price, quality, and service, but now you have to add what you’re doing to protect the environment.”

        Jeff Hunter, president of Federal Looseleaf in Minneapolis, Minn., considers recycling and other green initiatives a customer-driven solution – and a good way for a business to be Lean. “I’ve had customers ask us whether we use electrical- or gas-powered pallet jacks,” he said. (For the record, the company uses human-powered pallet jacks.) “We don’t let any equipment ‘hum and run,’ and we turn off lights and reuse and recycle ring mechanisms, chip board, and vinyl. It just makes good business sense to salvage over-runs, recycle at the curb, and be energy-efficient.”

        Richard Senior, president of Duraweld Limited in Scarborough, England, and BIA chairman, noted that the industry needs to embrace environmental stewardship for its own sake: “It is becoming increasingly important that companies become green not just to get orders or get on recommended supplier lists but because they actually care how they affect the planet,” he said. And while Senior said the current economic situation has shown a slippage of green initiatives in favor of the cheapest price, he’s confident that the sustainability movement is here to stay.

        Knowing the Lingo

        For starters, companies considering green initiatives must understand widely used environmental terms. Below are several definitions from the SGP Partnership, a certification organization that recognizes facilities that have met sustainable manufacturing and business practices. (For more on SGP – plus a study on the recyclability of foil-decorated paper – see the box on page 25.)

        • Carbon footprint: The total set of GHG (greenhouse gas) emissions caused directly and indirectly by an individual, organization, event, or product, commonly measured in metric equivalent units of carbon dioxide (CO2e). It is meant to be a useful metric for individuals and organizations as they conceptualize their personal (or organizational) impact on global warming.
        • Carbon neutral/Carbon neutrality: Refers to a net zero carbon release, brought about by balancing the amount of carbon released with the amount prevented, sequestered, or offset.
        • Carbon offset: The mitigation of greenhouse gas emissions by offsetting emissions generated in one location with emissions reductions or displacements in another where it is technically and/or economically more feasible to achieve those reductions. Carbon offsets are measured in metric equivalent units of carbon dioxide (CO2e). Carbon offsets can be purchased and traded through financial instruments representing greenhouse gas emission reductions.
        • Cradle-to-cradle: A system by which materials are maintained in closed loops from creation to final fate to maximize material value without damaging ecosystems. Cradle-to-cradle protocols minimize waste through recycling and reuse, rather than disposal.
        • Greenwashing: The unjustified appropriation of environmental virtue by a company, industry, government, politician, or even non-government organization to create a pro-environmental image or sell a product or a policy (definition attributed to Sourcewatch).
        • Sustainability: Meeting the needs of the present without compromising the ability of future generations to meet their own needs (definition attributed to World Commission on Environment and Development).

        Industry Challenges – and Payoffs

        If implementing sustainable practices in a formal, organized manner was easy, every binding or loose leaf business would already be on board. “The most important challenge a company faces is making everybody internally, from top to bottom, agree on the environmental policy and then carry it out in practice,” Senior said. “We’re trying to steer customers in a green direction but, believe it or not, our customer service staff still has a knee-jerk reaction to quote what the customer wants rather than suggest what might be better.” He noted that other challenges include how to cut energy consumption, reduce waste, and recycle – not just send items for recycling.

        Bovay noted some additional challenges, including customers who don’t want to pay the price of more environmentally friendly products – particularly in these cost-conscious times – and developing cost and production efficiencies to make sustainability practices affordable. Other issues include developing systems and processes to assess reductions in material costs, utilities, and waste disposal costs as well as cost improvements and efficiencies in health and safety, operating, maintenance and replacement, and legal and insurance.

        “Socially responsible binderies are at a cost disadvantage from those that keep labor costs down and pay the least they can,” Bovay added. “And you need to consider that binderies compete not only with other binderies but with their own customers – i.e., printers, most of whom have their own in-house bindery services and can spread that cost amongst more people and more processes.”

        The good news is that companies implementing sustainability goals are seeing positive results. For example, Duraweld has invested in recycling, including recycling equipment, and in energy-saving machines, lights, etc. Plus, the company soon will attempt to recycle rainwater through its toilets. “As a result, we’ve reduced energy consumption, reduced what we send to the landfill by about 30 percent, and realized an income stream from our surplus segregated polypropylene, PVC, and card waste,” Senior said. “And, although it took us nearly a year, we were the first in Europe to create our own 100 percent recycled clear polypropylene from production waste.”

        According to Hunter, Federal Looseleaf has had success producing 100 percent recycled binders – a polyplastic version and one with recycled wood products. “Our binders are close to closing the loop environmentally – a customer can recycle the binder case at the curb with his cereal boxes and the ring mechanism with his metal cans,” he said.

        Pacific Bindery has invested in lowering its energy costs and has optimized its closed waste paper handling system. “In an average year, we recycle 1,300 tons of waste paper,” Bovay said. “We also have reduced our use of plastic containers, solvents, rags, strapping and wrapping, and recycle what we do use – sending less waste to landfills.” And although the economic downturn has hurt recycling revenue, Pacific Bindery’s environmental initiatives return approximately $70,000 to the bottom line in an average year.

        What’s Right for You?

        Industry leaders agree that not every bindery or loose leaf operation will go in the green direction. The key, they said, is to assess your customer base to determine how important an environmental focus is to the markets you serve. A good way to begin, Jones said, is to talk with your top customers and learn whether customers are making environmental commitments, and one good place to start is to review their websites. That said, Jones acknowledged that an environmental focus requires a business to undergo a “culture change” – where everyone in the workforce becomes involved in the process – and that some companies will determine, for a variety of reasons, that such change is not necessary.

        If you decide to forgo green initiatives, Jones still recommends putting in place an effective energy management system, citing the price of fossil fuels and the push by various levels of government to reduce greenhouse gases. Efficiency ideas include buying Energy Star-compliant appliances and equipment when replacing old models; installing motion detectors in low-traffic areas; eliminating screen savers on computers; and installing more energy-efficient lighting. He also encourages companies to think of the energy-management and green plan as a continuous-improvement project. “Go through each department and think about how to reduce waste and cut costs,” he said. “Start with the easiest to implement – you don’t have to spend a lot of money.”

        Of course, keeping up with environmental issues and figuring out how to respond to them given your market is no easy task. But industry leaders note that taking the first few steps can make a big difference. “The companies that are enjoying the greatest success from a business-retention, business-generation, and cost-savings perspective are those that are making the transition to green,” Jones said. “They’re harnessing the power of their workforce to reduce operating costs, cut energy consumption and waste, and finding recycling opportunities.”

        On the Forefront

        If your company is ready to take on sustainability, Bovay has this advice: 1) Start the dialogue with your suppliers. “Begin to apply some pressure on them to look at developing more environmentally friendly alternatives that work,” she said. 2) Take one small step at a time. “You don’t need certification to do the right things. However, a certification process will help to guide you and hold you accountable.” 3) Reduce waste and work with environmentally safe (or safer) materials. “Develop socially responsible policies and practices, and focus on a differentiation strategy that includes a commitment to sustainability.”

        “Most environmental care is common sense and starts by looking at yourself and how wasteful you are – and then going forward from there,” Senior added. “Do not be afraid to stick your neck out, and do not be afraid to challenge normal unethical practices.”

        Industry Update: Sustainability Certification, Recyclability Study of Foil-Decorated Product
        To promote green initiatives in the print and graphic communications industry, the Sustainable Green Printing (SGP) Partnership was founded as an independent certification organization in 2007. According to Gary Jones, director of environmental, health, and safety affairs for Printing Industries of America in Sewickley, Pa., printers can apply to become a “Sustainable Green Printer” – and now the SGP is working on creating certification criteria for binderies and finishers, including loose leaf companies.”When SGP circulated its draft document two years ago, I expressed interest in offering input on the ‘bindery version’ of the policy,” said Kris Bovay, general manager of Pacific Bindery in Vancouver, British Columbia, and SGP board member. Bovay and other members of an SGP technical advisory committee met for the first time in April to begin developing certification standards for binderies and finishers. “Understand that certification only offers a unique differentiation in the early days of the program – so don’t ‘do certification’ just for the marketing benefit; do it because it’s the right thing to do,” Bovay added. “The businesses that are best, and honest and ethical in their sustainability commitment and approach, are recognized as leaders.”

        Another issue for binderies concerns the recyclability of foil-decorated projects from printing customers. Last fall the Foil & Specialty Effects Association (FSEA) commissioned a study by Pira International, an independent research firm in Surrey, England, to evaluate the repulpability of foil-decorated paper/board. The evaluation included foil-decorated product that represented 25 to 100 percent post consumer waste and that was utilized from both hot foil stamping and cold foil processes. The study concluded that neither hot nor cold foil-decorated products would yield the kinds of problems found in other decorating processes that might render them unsuitable for recycling. To obtain a copy of the 14-page study, call the FSEA at (785) 271-5816 or email jeff@fsea.com. For more on the SGP certification program, visit www.sgppartnership.org.

        Cover Materials Go ‘Green’

        November 21, 2008

        by: Dianna Brodine

        Concern grows daily over the state of our natural resources and the impact is being felt in the printing industry. Driven by consumer desire for products that are “green,” companies are taking action to utilize forest and water resources in a responsible manner. The Forest Stewardship Council (FSC) advocates for sustainable forestry and is leading the environmental charge for green printing practices.

        The Forest Stewardship Council

        The FSC was created in 1993 in response to a worldwide need to preserve forestry resources, while at the same time meeting commercial product needs. Comprised of loggers, foresters, environmentalists, and sociologists, the FSC created standards for forest management that are now accepted in more than 55 countries.

        There are two certifications issued by the FSC that apply to the printing industry. The first is FSC certification, which indicates that strict forest management standards were followed in harvesting trees for use in commercial applications. There are 10 principles, ranging from compliance with the laws of the country in which the harvesting takes place to respect for the rights of indigenous people and workers to minimizing environmental impact. FSC certification for the forestry source is the initial step for print industry members who want to be “green”.

        Any product made of pulp or paper has the potential to be certified as long as the wood used in the product originates from FSC-certified sources. Wood is an important material for all paper manufacturers. The FSC certification system allows these professionals to know they are doing the right thing and taking business away from other companies that may still be supporting illegal, unsustainable, unverified logging activities. (FSC web site, www.fscus.org)

        The second standard is Chain-of-Custody (COC) certification. COC states that the raw materials harvested from an FSC-certified source have been processed, manufactured, distributed, and printed through sources that also have achieved COC certification.

        Again, to assure the credibility of claims on products, it is important to track materials as they leave the forest and become products down stream. This “chain of custody” (COC) certification process is quite simple. Like any inventory control system, COC allows products to be segregated and identified as having come from a particular source – in this case, an FSC-certified forest. FSC’s model of certification allows products that flow from certified forests to enter the marketplace with a credential that is unique. (FSC web site, www.fscus.org)

        Applying Green to the Marketplace

        Gane Brothers and Lane, a 160-year-old materials provider in Elk Grove Village, Ill., is working with FSC Chain-of-Custody certified vendors to make sure the printing, binding, and loose leaf industries have access to “green” cover board and papers.

        Jeff Carlson, vice president of marketing for Gane, confirmed that the trend toward green materials is motivated by the end consumer. “We are getting more requests for information via e-mail and phone, asking about FSC-certified materials. The people that are contacting us are the manufacturers and their questions are being driven by customers who have a particular interest in the green movement.”

        Gane was fortunate in that it didn’t have to search out new providers of FSC-certified materials. Gane has been working with FiberMark and Eska Graphic Board for a few years and the companies have carton stock and board product that has achieved certification.

        Since many of the consumable items labeled as “green” reach retail shelves at a higher price point than similar non-green items, it would be reasonable to assume that green printing materials would also have a higher cost. According to Carlson, that assumption is incorrect. “I don’t see any discernible difference in pricing between these materials and materials that are not certified.”

        Paper products that are FSC-certified have the same physical characteristics and attributes as non-certified products, with no compromises in quality. “Compared to other board products that are used for the same purpose, the certified board is almost identical,” stated Carlson. “There’s no difference in performance.”

        The movement toward green printing is just beginning and Carlson acknowledges that offering FSC-certified products gives the supplier an edge, but that’s not the only reason for Gane to offer environmentally friendly materials. “Obviously, a lot of people are looking into green products,” Carlson said. “To be able to offer those makes us a more valuable supplier, but we try to do our part, too. As a company, we recycle because we’re concerned about the environment as well.”

        Environmental concern is a growing reality for suppliers and manufacturers in all industries, motivated by the desire of the end consumer for planet-friendly footprints. The Forest Stewardship Council is leading the charge in the print business by providing certifications that ensure responsible use of forestry resources. Material providers like Gane Brothers & Lane are doing their part by making COC-certified materials available to print and bindery customers.

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