The utilization of kiwi (Actinidia deliciosa ) pruning waste for kraft paper production and the effect of bark on paper properties

In this study, samples of pruning residuals from kiwi (Actinidia deliciosa) with and without bark were used in order to identify the negative impacts of the bark on pulp and paper production. The Kraft method was used to cook the samples, and six tests were conducted, three with bark and three without bark. In the six tests, the active alkaline/sulfide ratios, temperature, and time were stabilized at 18/22, 170°C and 170 min, respectively. Some of the physical, optical, and mechanical properties of the unbeaten papers produced at 35 SR° and 50 SR° were compared. For all of the mechanical properties that were measured, the bark had a negative effect. This could be explained by the high content of brittle inorganic material in the bark’s fibers.