FOOD 4070 Lecture Notes - Lecture 4: Molded Pulp, Starbucks, Henry Fourdrinier

• School: University of Guelph
• Department: Food Science
• Course: FOOD 4070
• Professor: Loong Tak Lim

Document Summary

** know the major component of wood and the the fiber length. Removing the lignin to make paper to liberate the fiber. Suction boxes removes the water from the fiber. 70-90% moisture still remains at the end of the line (first press: press removes this water (heated) Manufacturing of 1-layer paper: need more layers to strengthen the paper. Cylinder machine for multi0ply paperboard for multiple layer sheets. Forming wire woven screen made of wire, with lots of holes so water can escape. Fold endurance (how many times you can fold it until it fails. Polyethylene (pe) besides a moisture barrier, also used as glue (adhesive) Wax is also used: but not good because it cracks adhesive: polyethylene easy to open (milk carton) strong bonding pigments. 1 kraft paper: brown because of lignin (may not always be brown, bleach it, very strong, grocery paper bag, thought to be more environmentally friendly (but not necessarily)