Effects of High-Consistency Disintegration on the Qualities of Recycled Papers
碩士 === 國立中興大學 === 森林學系 === 85 === The aim of this study was designed to reduce water, chemicals and power consumption in a high-consistency disintegration of waste paper, and the effects of high-consistency disintegration on qualities of recycled papers...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1997
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| Online Access: | http://ndltd.ncl.edu.tw/handle/38743354877040913832 |
| Summary: | 碩士 === 國立中興大學 === 森林學系 === 85 === The aim of this study was designed to reduce water, chemicals and power
consumption in a high-consistency disintegration of waste paper, and the
effects of high-consistency disintegration on qualities of recycled papers
were also studies. The experimental results were described as follows:
1. It was concluded that high-consistency disintegration could reduce the
ink particle size to a greater extent in contrast to the conventional
deinking process for 3 different pulps.
2. It was evident that as dispersion time and pulp consistency increased,
pulp brightness and pulp strength increased without chemical addition
after the high-consistency disintegration stage.
3. The lower brightness of dispersed old magazine paper (OMP) revealed that
high residual lignin (kappa number) might be present in OMP.
4. 83.5% brightness of dispersed recycled xerographic paper and 69.3%
brightness of mixed papers can be achieved by adding alkali in
high-consistency recycled wastepaper after deinking treatment.
5. Well-dispersed thermoplastic resins-containing xero-graphic paper can
be attained by high-consistency dispersion in contrast to conventional
hydraupulping process.
6. In general, it is desirable to deink the mixed wastepaper stock under
high-consistency. Dispersion with affiliating washing/flotation deinking
system may attain a brightness of deinked pulp over 70%.
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