Stock Prep/Refining
Our pilot plant is fully equipped to perform all major areas of stock preparation, including size reduction, repulping, cleaning, screening, and refining. We can take virtually any raw material – from wood, agricultural residuals, plant, or synthetic source – and produce a wide range of products from laboratory to commercial scale.
Stock Prep
Pulp impurities arising from wood or external sources can be separated based on size, shape, specific gravity, and specific surface differences. Centrifugal cleaners are arranged to allow for performance evaluation under typical operating conditions and a pressure screen can remove oversized foreign bodies. Our Centri-sorter can be operated under a wide variety of conditions. Our stock prep equipment includes:
Refining
Refining is a critical operation in which the inherent properties of the paper are developed. All refiners are equipped with variable-speed motors. The refiner loop is connected to several tanks for refining studies in recirculation or single-pass mode. The refiners allow for a range of refining prior to papermaking as well as for a comparison of the benefits provided by each type of machine. Our production scale refiners include:
Capabilities
Regmed 6″ Single Disc
Designed for R&D, pilot trials, and specialty fiber processing at the bench scale (50L), this medium-consistency refiner handles pulp suspensions up to 6%, ideal for developing nanofibrillated (NFC), microfibrillated (MFC), and conventional pulp products. The PDC currently has three different plate types for this refiner, depending on the application. Currently, staff are conducting a study to compare the performance to our commercial scale double-disk refiners.
KRK High Consistency Disc Refiner
The refiner is one of basic machines used in test and research area of pulp and paper industry and other related industries. It turns wood chips into pulp, conditions the pulp, and makes pulp of synthetic fibers, glass fibers and carbon fibers. With this machine, it is easy to perform processing into fiber and fibrillation of various polymers in diverse fields. Its shape is the same as the practical refiner used in the manufacturing plant, producing the same quality of the actual final product.
PFI Mill
The PFI Mill is a high-precision laboratory refiner designed to evaluate the refining behavior of pulp under standardized conditions (ISO 5264-2, TAPPI T248). It processes 5–40 g pulp samples at adjustable pressures (1.0–5.5 N/mm), simulating industrial refining to generate reproducible data on fiber development, freeness, and energy consumption. Ideal for R&D environments, it features automated cylinder control, real-time monitoring of refining parameters, and robust construction for consistent, repeatable testing of fiber-based materials.
To begin working with us, visit our Working with the PDC page.