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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1999.6
- 수록면
- 386 - 389 (4page)
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초록· 키워드
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Amphoteric polymers have brought to papermakers' attention gradually. In this paper, a series of amphoteric starches with different cationic and anionic degree of substitution (DS) are prepared. Better product has been selected and used under different condition.
As retention and drainage aids, amphoteric starches were used in 'shorter fiber length, weak strength and poor drainage bleached AQ-Soda wheat straw pulp. In neutral and alkaline papermaking system, when amphoteric starches contain 0.024anionic degree of substitution (DS), it is shown that the higher the cationic degree of substitution (DS) in amphoteric starches, the better the filler retention. The filler retention is improved 12.5%. 30.3%, and 35.1 % and 32.5% respectively by adding 1 % amphoteric starch LS-L2 -I (0.034), LS-L2-2 (0.040). LS-L2-3 (0.047) and LS-L2-4 (0.052). But the strength of handsheets is affected a little. By adding 2% Al2 (S04) J and 1.5% LS-L2-3 at pH 7.5, filler retention can be improved from 38% to 80%. and breaking length of sheet only decreases 3.2%. As dry strengthening aids, amphoteric starches were used in eucalyptus APMP. Amphoteric starches are used in eucalyptus APMP. The amphoteric starch LS-L2-2 is better dry strength aid. Adding 1% LS-L2-2 can improve breaking length 24.5%. burst index 42.9%. tear index 38.8%. folding endurance and density of the handsheets.
As retention and drainage aids, amphoteric starches were used in 'shorter fiber length, weak strength and poor drainage bleached AQ-Soda wheat straw pulp. In neutral and alkaline papermaking system, when amphoteric starches contain 0.024anionic degree of substitution (DS), it is shown that the higher the cationic degree of substitution (DS) in amphoteric starches, the better the filler retention. The filler retention is improved 12.5%. 30.3%, and 35.1 % and 32.5% respectively by adding 1 % amphoteric starch LS-L2 -I (0.034), LS-L2-2 (0.040). LS-L2-3 (0.047) and LS-L2-4 (0.052). But the strength of handsheets is affected a little. By adding 2% Al2 (S04) J and 1.5% LS-L2-3 at pH 7.5, filler retention can be improved from 38% to 80%. and breaking length of sheet only decreases 3.2%. As dry strengthening aids, amphoteric starches were used in eucalyptus APMP. Amphoteric starches are used in eucalyptus APMP. The amphoteric starch LS-L2-2 is better dry strength aid. Adding 1% LS-L2-2 can improve breaking length 24.5%. burst index 42.9%. tear index 38.8%. folding endurance and density of the handsheets.
목차
ABSTRACT
INTRODUCTION
EXPERIMENTAL MATERIALS AND METHODS
RESULTS AND DISCUSSION
CONCLUSIONS
REFERENCES
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