Adhesion properties of soy protein with fiber cardboard

Adhesion properties of soy protein isolate (SPI) on fiber cardboard and eff ects of press conditions, pre-pressing drying time, and protein concentrati ons on gluing strength were investigated. Shear strength increased as press time, press pressure, and/or press temperature increased. The effect of te mperature on shear strength became more significant at high press pressure. The shear strength uf the SPI adhesive on fiber card board decreased by 12 -25% after water soaking. Shear strength increased as pre-pressing drying t ime increased and reached its maximal value at about 10 min. An SPI/water r atio of 12:100 (W/W) Save the highest gluing strength. The specimens showed complete cohesive failure (fiber cardboard failure) except for soaked spec imens pressed at low press temperature, low pressure, and short press time. Specimens pressed at 25 degreesC and 2 MPa for 5 min with pre-pressing dry ing time of 10 min and an SPI/water ratio of 12:100 (w/w) had T-peel streng th and tensile bonding strength of 1.15 N/mm and 0.62 MPa, respectively, wi thout water soaking, and 1.11 N/mm and 0.24 MPa, respectively, with water s oaking.