Abstract:
Approximately 1100 tons of carbon waste is removed from different sectors
in Sri Lanka. This project focuses on a product that features a bio-degradable
pen made with wooden material and a carbon ink core, ensuring ecofriendliness.
Cedar wood is the most preferred material used for the outer
casing of the proposed pen. Dimensions of the created wooden pen are an
outer diameter of 7mm, an inner hole diameter of 1.5-2.0mm range, and a
length of 143mm. As a novelty, using plastic carbon tubes is prevented
during the design, instead a low-thickness UV resin is used which enhances
the ink's continuous flow. A hard type UV resin is used as the inner coating
because of the shorter curing time and durability, with the purpose of coating
and sealing ink from the outer casing. The resin is compressed into the pen
hole by a needle. A compressed airflow is fed to the pen hole to facilitate an
even spread out of the resin inserted. After 20-25 minutes of drying process,
low viscous carbon ink is filled in until it reaches a rate of 95% of a
perforated pen hole length according to standards. The weight of the
proposed pen will be approximately 4.50-4.80g, in comparison the plastic
pen comprises 4.94-6.10g. A weight reduction of approximately 21% has
been achieved from the proposed pen. When considering the decay lifetime
of the proposed pen, it takes 2 to 3 years to decay without any specific decay
treatment method while the existing plastic pen will take 20 to 500 years to
decay. In the future implementation, the clip of the pen can be designed
using bio-degradable materials, while there is a possibility of splitting the
product into two distinguished portions as a pen and a pencil.
