Diploma thesis Daniela Dittmer

Development of compostable molded packaging parts from seed processing residues

Aim
In this work, the production of molded parts (packaging trays) from seed processing residues of field pea, blue lupin and rough oats was investigated. Very finely granulated field pea seeds proved to be a promising binder. The comparatively best results in mechanical tests were achieved in combination with coarsely digested stem-rich blue lupin residue fractions. Moulded bodies could be produced from this combination of materials, but the process parameters still need to be optimized in order to completely avoid defects in the shells. In addition, the use of vibrating machines was tested to improve the process step of fleece laying or mat spreading. Vibration parameters were found for both horizontal and vertical vibration deflection that led to an even distribution of the bulk material in the mold box. In the case of vertical vibration deflection, it was concluded from the tests that the success of the bulk material distribution depends on an acceleration limit value being exceeded. This is expected to be in a range between 2.5 g and 3.7 g.