The effect of creasing and calendering on barrier properties of dispersion coated paperboards
Edson, Osima (2017)
Julkaisun pysyvä osoite on
Paper and paperboard based product are significantly used in our daily life. The most effective and efficient way to produce paperboard packages is by converting. This study analyses the key aspects of converting mechanism and the effect of various barrier properties of dispersion coated commercial paperboard material to enhance the end user quality of paperboard and paper-based products. The preliminary focus of this study is to determine the creasability of barrier properties of dispersion coated paperboards, and the results are complemented and validated with experimental techniques such as calendering, creasing, Cobb60 and OGR test. The coating materials used in this study are hydroxypropylated starch, kaolin clay, and styrene-butadiene latex and also their effects on creased and uncreased paperboard are compared with the aid of light microscopy. Furthermore, the effect of creasing and calendaring on barrier properties of dispersion coated board is investigated. The results revealed from these two approaches that light microscopy is not capable to thoroughly analyze the coating cracks. High-resolution microscopes such as SEM is required entirely to understand the individual fibre damage. Moreover, dispersion coated paperboard, and commercial material showed positive results on oil and grease resistance (OGR) test. The calendaring process can be used to improve the OGR of barrier properties of dispersion coated paperboard. Mechanical and physical properties like bulk, density, grammage, air permeability, roughness, strain break (% elongation) and tensile strength are measured to analyze and contemplate the study.