SU771548A1 - Method of testing of strength properties of wood pulp - Google Patents
Method of testing of strength properties of wood pulp Download PDFInfo
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- SU771548A1 SU771548A1 SU782674983A SU2674983A SU771548A1 SU 771548 A1 SU771548 A1 SU 771548A1 SU 782674983 A SU782674983 A SU 782674983A SU 2674983 A SU2674983 A SU 2674983A SU 771548 A1 SU771548 A1 SU 771548A1
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- SU
- USSR - Soviet Union
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- pulp
- density
- perimeter
- strength properties
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- Prior art date
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Description
1one
Изобретение относитс к получению древесной массы в целлюлозно-бумажной промьлшенности.This invention relates to the production of pulp in the pulp and paper industry.
Известен способ контрол прочност,ных свойств древесной массы The known method of controlling the strength properties of wood pulp
включающий измерение степени помола фракции 48/100 меш, S 48/100 и средней длины волокон с последующим расчетом по ним прочностных свойств древесной массы, данный способ поз- 10 вол ет осуществл ть текущий контроль прочностных свойств древесной массы . Однако он характеризуетс недостаточной воспроизводимостью измерений и расчетов.15including measurement of the degree of grinding of the 48/100 mesh fraction, S 48/100 and the average fiber length with the subsequent calculation of the strength properties of the pulp therefrom, this method allows one to monitor the strength properties of the pulp. However, it is characterized by insufficient reproducibility of measurements and calculations. 15
Цель изобретени - повьлиение точности контрол прочностных свойств древесной массы.The purpose of the invention is to increase the accuracy of controlling the strength properties of pulp.
Это достигаетс тем, что по предлагаемому способу дополнительно из- . JQ мер ют среднее значение площгши и периметра поперечного сечени и плотности волокон, а контролируемый параметр корректируют в зависимости от дополнительно измеренных величин. 25This is achieved by the fact that according to the proposed method, further iz-. JQ measures the mean area and perimeter of the cross section and fiber density, and the monitored parameter is adjusted depending on the additionally measured values. 25
Пример. В качестве xapeiKTeристики прочностных свойств древесной массы вз та разрывна длина.Example. The length of the strength properties of the pulp was taken as xapeicTeristics.
В лабораторных услови х при различных степен х помола (52, -30Under laboratory conditions at various grinding levels (52, -30
77,) готов т древесную массу, из которой в дальнейшем получают лабораторные образцы (отливки). Из отливок древесной массы вырезают полоски дл испытаний на прочностные свойства и определ ют разрывную длину по ГОСТу 16296-70.77,) wood pulp is prepared, from which laboratory samples (castings) are subsequently obtained. The test strips for strength properties are cut out from wood castings and the breaking length is determined according to GOST 16296-70.
Параллельно у отбираемой суспензии дазевесной массы определ ют средние значени длины L и диаметра db волокон по формулеIn parallel, the average values of the length L and the diameter db of the fibers are determined from the suspension of the dasevoid mass selected by the formula
1 one
П: ХгП )P: hgp)
N Sin.N sin.
l--i l - i
где X - среднее значение параметра/ N - общее количество волокон, i-oe значение параметра, where X is the average value of the parameter / N is the total number of fibers, the i-oe parameter value,
XIколичество волокон с i-ым XI amount of fibers with i-th
I значением параметра. Средние значени площади Fb и периметра П поперечного сечени волокон определ ют соответственно по формуламI parameter value. The average values of the Fb area and the perimeter P of the fiber cross section are determined respectively by the formulas
F - (71 , (3) Ь 4F - (71, (3) L 4
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782674983A SU771548A1 (en) | 1978-10-02 | 1978-10-02 | Method of testing of strength properties of wood pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782674983A SU771548A1 (en) | 1978-10-02 | 1978-10-02 | Method of testing of strength properties of wood pulp |
Publications (1)
Publication Number | Publication Date |
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SU771548A1 true SU771548A1 (en) | 1980-10-15 |
Family
ID=20789675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU782674983A SU771548A1 (en) | 1978-10-02 | 1978-10-02 | Method of testing of strength properties of wood pulp |
Country Status (1)
Country | Link |
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SU (1) | SU771548A1 (en) |
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1978
- 1978-10-02 SU SU782674983A patent/SU771548A1/en active
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