Abstract:
Rice bran is the by-product of the rice bran oil production process. Generally, rice bran waxes were mixed with animal feed, however there was still plenty of amount of rice bran waxes left in industries. Therefore, researchers tried to develop rice bran waxes to be coating material for preparing in order to increase water resistant ability and fat resistant on paper. The research aimed to study the optimal ratio of rice bran waxes in coating paper and to test water resistant ability and fat resistant properties, as well as mechanical properties (burst and tensile strength) of 2 types of coated paper (C1S white and Kraft paper (KP)). The experiment was first done by finding the optimal proportion of rice bran wax coating which were rice bran wax at 10% - 90%, mixing with gelatin (2%), glycerol (60%), and water (25±3%).Then papers were coated and tested for their water resistant ability, fat resistance as well as their mechanical properties. The results showed that the optimal ratio of rice bran waxes were 10% and 15% of all solutions and coated papers (2 types) increased water and fat resistance. In addition, for the mechanical properties, it was found that burst strength of the both C1S White and KP paper were insignificantly different when compared with uncoated paper. Meanwhile, tensile strength of coated paper (C1S White) was insignificantly different but tensile strength of KP coated paper increased significantly when compared with uncoated paper.