Abstract
Old Corrugated Container (OCC) is one of the most potential raw material for paper and paperboard manufacture but it has some disadvantage of a continued decrease in the quality of the fiber during the recycling process. It’s caused by decreasing of carboxyl groups when the fibers undergo drying, resulting in decreased ability for swelling, thereby reducing the ability of the bond between the fiber and the fiber strength. Modification of waste paper using laccase enzyme may increase the fiber content of the carboxyl group of waste paper, therefore will increase paper strength. Experiments carried out with the addition of laccase in various dosage paper stock originating from OCC by 5% pulp consistency. 80 g/m Laboratory sheets, was made from stock, then analyzed by tensile index, burst index, wet tensile index, the content of carboxyl groups and SEM analysis. The experimental results showed addition of 50 U/g laccase at OCC giving optimum value for physical properties. Keywords : OCC, laccase, Physical properties, Carboxyl groups, SEM. DOI: 10.7176/CMR/13-3-04 Publication date: November 30 th 2021
Highlights
The use of recycled fiber as raw material for making paper and cardboard has various advantages such as reducing the use of natural fiber sources from trees, reducing of energy used, and reducing the risk of pollution due to the paper-making process (Wan et al, 2011)
Used corrugated container is a potential source of recycled fiber, especially as a material for packing cartons
The use of recycled fiber needs to be followed by the addition of reinforcing additives and / or intensive mechanical grinding (Neves and Ferrão, 2012), besides that the use of used OCC can cause paper products to lose their strength properties. (Wan et al, 2011)
Summary
The use of recycled fiber as raw material for making paper and cardboard has various advantages such as reducing the use of natural fiber sources from trees, reducing of energy used, and reducing the risk of pollution due to the paper-making process (Wan et al, 2011). One of the things that gives OCC an advantage as a raw material for making paper and cardboard is the flexibility and durability of the fiber (Kasmani, Samariha and Nemati, 2014). The addition of recycled fibers such as used OCC as raw material for paper or cardboard has a negative impact, namely a decrease in the ability to form fiber bonds. The use of recycled fiber needs to be followed by the addition of reinforcing additives and / or intensive mechanical grinding (Neves and Ferrão, 2012), besides that the use of used OCC can cause paper products to lose their strength properties. (Wan et al, 2011)
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