抄録
An attempt was made for the preparation of compounded papers using wasted tea leaves that could withstand
repeated washing. Emulsion Polyamide-Epichlorohydrin copolymer was added as a binder to slurry containing crushed
wasted tea leaves and hemp for paper making. When the resulting paper was measured for tensile strength under a wet
condition, it was found markedly improved over a control paper without the emulsion. For instance, tensile strength was
2.1 Nm/g for a compounded paper containing 90 wt% hemp and 10 wt% wasted tea leaves but no binder, whereas the
addition of the binder at 0.75 wt% improved tensile strength to 16.8 Nm/g. Compounded papers using wasted tea
leaves were also very effective for deodorizing ammonia gas ; a paper containing a small amount, 10 wt%, of wasted
tea leaves decreased the ratio of residual odor to 0.6 % in three hours. The addition of the binder was also found to keep
the deodorization effect of the paper. Furthermore, a compounded paper using wasted tea leaves was repeatedly
subjected to washing. The addition of the binder strikingly improved the washing durability of the paper that was
subjected to washing repeatedly ; at an addition level of 0.75 wt%, the paper did not show any damage even after it was
washed repeatedly 20 times. Further, the deodorization effect after washing was maintained. In fact, the ratio of
residual order was very small at 2.1% or less in an hour even after the 20 times washing.
