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Preparation of the Foam Block using Waste
Paper
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Katsuyuki FUNAKI, Yukio NANAYAMA, Yoshimasa SHIMBO, Ken MATSUMOTO,
Yukio HIROSE and Yoshiyuki YAMADA
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Recently, using the liquefaction of cellulose, such as a wood fiber, the
biomass plastics manufacture technique is developed. In this technique,
a foaming is carried out by an isocyanate polymerization reaction using
a polyol as a solvent. It is expected as a new plastic manufacturing method
alternative to petroleum system. In this study, in order to accelerate
the other applications of surplus waste paper, we examined a preparation
method that involved naturally occurring polymer foam using low-grade
used paper, such as newspapers or magazines. The main results obtained
are as follows;
| (1) |
Polyethylene-glycol system solvent can be acted
and the liquefaction of waste paper can be obtained by heating the
paper at 70 to 80 ℃ with a microwave. |
| (2) |
The foaming of paper liquefaction is carried
out by churning mixture to the isocyanate, and if churning velocity
is large or a temperature of the process is high, a foaming and
a cure rate becomes quick. |
| (3) |
The foam made from color printed papers showed
higher compression hardness than the case of newspapers. Especially,
when a newspaper and advertising paper are mixed by 1:1, the hardness
more than styrene foam was obtained. |
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Keywords ■■■ |
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waste paper, foam, urethane reaction,
liquefaction of cellulose, compression hardness, recycle |
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