Dry Molded Fiber: A Manufacturing Revolution in Paper-Plastic Packaging

Traditional wet pulp molding processes consume vast amounts of water and require high energy, limiting the large-scale adoption of paper-plastic packaging. Breakthroughs in Dry Molded Fiber technology are redefining the manufacturing paradigm for fiber-based packaging through an innovative approach characterized by "zero wastewater, low energy consumption, and high-speed molding," providing an industrially viable technical solution for the global "paper-for-plastic" strategy.

The "Water Dilemma" of Traditional Processes

For a long time, the production of molded pulp products has relied heavily on wet molding processes-mixing plant fibers with water to form a pulp, which is then vacuum-formed and dried. This process consumes vast amounts of water, and the subsequent drying stage entails significant energy costs. More importantly, wet processes have inherent limitations in terms of molding precision and the production of complex structures, making it difficult to meet the demand for thin-walled, precision products in high-end packaging. With global water resources becoming increasingly scarce and energy costs continuing to rise, the industry urgently needs a more efficient and environmentally friendly manufacturing method.

Dry Molding: A Technological Leap from "Water-Based" to "Air-Based" Processes

The core innovation of dry fiber molding technology lies in replacing water with air as the medium for fiber transport. This technology uses air-laying to feed dry fibers directly into the forming mold, where they are thermally pressed and cured to form rigid fiber products. Compared to traditional wet-forming processes, dry-forming offers significant advantages: extremely low water consumption , an approximately 80% reduction in energy consumption, and a substantial increase in production efficiency, enabling high-speed continuous production with higher product precision and thinner wall thicknesses.

In early 2026, Sweden's PulPac announced that it had secured over 500 national patents for its dry-forming fiber technology worldwide, marking the technology's official transition from an "experimental process" to an "industrial category." PulPac's Chief Operating Officer stated: "Dry-forming fiber is no longer an experimental technology; it has become an independent industrial category, and we are seeing the market shift from curiosity to commitment." The company's R&D team has invested nearly 800,000 hours in research and development, establishing a comprehensive intellectual property system covering fiber preparation, air-laying, molding and pressing, mold configuration, and integrated functional features.

Fiber Bottle Caps: From "Possible" to "Realized"

The most notable breakthrough of dry-molding technology is its successful application to the most technically challenging component in packaging-the bottle cap. In March 2026, PulPac, in collaboration with PA Consulting and equipment partner Optima, launched a new generation of "plastic-like" dry-molded fiber bottle caps, designed to replace traditional plastic caps and unlock significant opportunities in the packaging sector. Early testing indicates that these fiber caps perform exceptionally well across key parameters-including thread engagement, opening and closing functionality, sealing performance, and tactile experience-meeting consumers' functional expectations for plastic caps. The product will make its public debut at the 2026 interpack trade show, marking the first time fiber has entered the realm of such complex packaging components on a large scale.

The maturation and industrialization of dry-molding fiber technology are challenging the conventional wisdom that "paper-plastic packaging cannot meet high-end performance requirements." From cushioning trays to precision bottle caps, the capabilities of fiber-based materials continue to expand. As global regulations on plastic restrictions become increasingly stringent, this technology-which combines environmental benefits with manufacturing efficiency-is expected to become the mainstream production method in the paper-plastic packaging industry within the next five years.