CN103759832B - Method for testing and controlling tobacco pulp color shading in process of producing reconstituted tobacco with paper-making method - Google Patents
Method for testing and controlling tobacco pulp color shading in process of producing reconstituted tobacco with paper-making method Download PDFInfo
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Abstract
The invention relates to a method for testing and controlling tobacco pulp color shading in the process of producing reconstituted tobacco with a paper-making method. The method is characterized by comprising the steps of tobacco pulp filter cake formation, color scale index measurement and color shading analysis and the like. The method has the advantages that operation is easy, requirements for testing personnel are low, and due to the adoption of the off-line testing method and data analysis software such as Excel, a test result can be obtained fast, negative influences on online production are avoided, and input cost for testing equipment is low.
Description
[technical field]
The invention belongs to the production control technology field of papermaking-method reconstituted tobaccos.More specifically, the present invention relates to test and the control method of tobacco slurry aberration in a kind of papermaking-method reconstituted tobaccos production run.
[background technology]
The cigarette enterprises such as the discarded tobacco leaf that papermaking-method reconstituted tobaccos is raw materials used is smashed tobacco powder, offal, cigarette are excellent, do not list grade in cannot be used for the tobacco waste of production of cigarettes.Papermaking-method reconstituted tobaccos enterprise utilizes the principle of papermaking these Feedstock treating to be produced the papermaking-method reconstituted tobaccos that can be used for production of cigarettes.
In the sensory evaluation index of cigarette, the glossiness of cigarette is one of index differentiating finished cigarettes quality.Papermaking-method reconstituted tobaccos as one of production of cigarettes important source material has strict requirement equally for color and luster.But adopt qualitative description more to the color of current papermaking-method reconstituted tobaccos, relying on the sensory evaluation of individual, with significant limitation, easily there is difference and difference to the judgement of assay, is unfavorable for the production control of product in this determination methods.In order to address this problem, someone (" quantitative test of papermaking-method reconstituted tobaccos color ", tobacco science and technology, o. 11th (total 268th phase) in 2009) work out according to CIE1976L*a*b* uniform colour space theory, adopt full-automatic colour examining colour-difference-metre, set up the quantitative detecting method of papermaking-method reconstituted tobaccos appearance color.But the application of this method in tobacco leaf production is not extensive.
And for the chromatism test of tobacco slurry and the method for control, be still in the news without any achievement in research targetedly at present.The production link of papermaking-method reconstituted tobaccos comprises: extract, concentrated, slurrying, shaping, the coating of manufacturing paper with pulp, oven dry etc.The color and luster quality of quality to the reconstituted tobacco produced of slurrying has a great impact.Wherein the color and luster of color and luster to reconstituted tobacco product of tobacco slurry self also has certain influence.In order to test the aberration of the tobacco slurry of papermaking-method reconstituted tobaccos more accurately, and strengthen the control to production run with this, the present inventor is through many experiments, finally the inventive method is worked out, be specially and utilize laboratory copy paper equipment to make filter cake in online slurry of getting, re-use color evaluating and chromatism test is carried out to it, test gained L ', a ', b ' value and standard L, a, b value are carried out comparing calculation and are judged that whether slurry aberration is qualified, and control the slurry aberration in production according to this.
[summary of the invention]
[technical matters that will solve]
The object of this invention is to provide test and the control method of tobacco slurry aberration in a kind of papermaking-method reconstituted tobaccos production run.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention relates to test and the control method of tobacco slurry aberration in a kind of papermaking-method reconstituted tobaccos production run, described method comprises the steps:
(1) tobacco slurry filter cake is formed
Use shaping bucket with the laboratory page forming machine of vacuum dewatering apparatus, tobacco slurry is poured in the shaping bucket of laboratory page forming machine, carry out negative-pressure vacuum dehydration, until filter cake surrounding is separated with shaping bucket, obtain the filter cake that thickness is not less than 0.5cm, by transfer paper, described filter cake is transferred to operator's console, the one side comparatively smooth by forming net side is upwards to be measured;
(2) mensuration of chromaticity index
Use the colourity of corrected color evaluating to the slurry filter cake that step (1) is formed to measure, obtain L ', a ', b ' value;
(3) color difference analysis
Obtain the standard colorimetric of slurry filter cake, described standard colorimetric comprises L, a, b value, the absolute value of L ', a ' that calculating L, a, b value and step (2) obtain, the difference of b ' value, comprise the absolute value △ b of difference of absolute value △ a and b and b ' of the absolute value △ L of the difference of L and L ', the difference of a and a ', judge that whether slurry aberration is qualified according to △ L, △ a and △ b.
A preferred embodiment of the invention, in step (1), tobacco slurry is the different types of slurry of each workshop section being selected from tobacco pulp, plus fiber slurry or finished pulp.
According to another kind of preferred implementation of the present invention, in step (1), shaping mesh number >=80 of described laboratory paper machine.
According to another kind of preferred implementation of the present invention, the color evaluating used in step (2) is L*a*b* type color evaluating.
According to another kind of preferred implementation of the present invention, in step (3) according to △ L, △ a and △ b to the decision method of slurry aberration, its criterion is:
(1) if △ L, △ a, △ b are all less than 1.5 think slurry aberration indifference;
(2) if △ L, △ a, △ b have one or several to be greater than 1.5, judge with △ E method, respective formula is as follows:
Wherein, aberration indifference is thought when △ E≤4; When △ E>4 then aberration there are differences.
According to another kind of preferred implementation of the present invention, when the △ E value that step (3) obtains is greater than 4, the production workshop section obtaining described tobacco slurry sample should adjust, to control slurry aberration in production.
In more detail the present invention will be described below.
The present invention relates to test and the control method of tobacco slurry aberration in a kind of papermaking-method reconstituted tobaccos production run, described method comprises the steps:
(1) tobacco slurry filter cake is formed
Use shaping bucket with the laboratory page forming machine of vacuum dewatering apparatus, get tobacco slurry pour in the shaping bucket of laboratory page forming machine by online, open negative pressure and carry out vacuum dehydration, until filter cake surrounding is separated with shaping bucket, form the filter cake that thickness is not less than 0.5cm, by transfer paper, filter cake is transferred to operator's console, the one side comparatively smooth by forming net side is upwards to be measured.
Reconstituted tobacco, also known as making reconstituted tobacoo, reconstituted tobacco, recombination tobacco leaf, homogeneous tobacco leaf.It utilizes discarded offal, tobacco leaf fragment, offal etc. to be raw material, through lixiviate, concentrated, separation, making beating, defibrination, manufacture paper with pulp, dry, perfuming process process, make the natural tobacco thin slice of function admirable, as cigarette filling material, be back to production of cigarettes.Papermaking-method reconstituted tobaccos utilizes the waste material produced in the production of cigarettes processes such as offal, offal, cigarette rod as production base stock, use for reference the reconstituted tobacco that paper technology is produced into, have that Filling power is high, flammability good, and cigarette cost can be saved, reduce tobacco leaf planting area.
The tested object of the inventive method comprises the different types of slurry of each workshop section, such as tobacco pulp, plus fiber slurry, finished pulp.The production of reconstituted tobacco roughly comprise tobacco material Soakage extraction, concentrated, separation, making beating, defibrination, manufacture paper with pulp, dry, the technological process such as perfuming.Wherein multiple production link relates to multiple slurry, carries out trace test in process of production to the aberration of these slurries, effectively and targetedly can control slurry aberration.Wherein, tobacco slurry is the slurry of tobacco raw material through high twice dense mill, once low dense bull ring joint, and principal ingredient has offal, tobacco fragment, cigarette rod, cigarette etc.; Plus fiber slurry is the slurry that additional pulpboard saves through hydrabrusher or high dense bull ring, and its composition can be wood pulp cellulose or flax fiber etc.; Finished pulp is through the slurry that link with slurry produces, and it comprises tobacco slurry, plus fiber slurry and filler.
In the methods of the invention, tobacco slurry carries out on-line period, and sample directly uses laboratory paper machine to make slurry filter cake, adopts in this way, can problem identificatioin source rapidly.
In this step, the equipment of employing is the laboratory page forming machine that paper industry routine uses, but requires that shaping bucket is with vacuum dewatering apparatus, for the vacuum dehydration of slurry.
Under normal temperature, pressure ﹣ 0.01 ~ ﹣ 0.10MPa condition, slurry carries out vacuum dehydration.These conditions are preferred, and are the operating conditionss known by those skilled in the art, and therefore the inventive method does not limit it.
The present inventor studies discovery, and the aberration of time to slurry of vacuum dehydration is influential.
In the methods of the invention, the slurry filter cake of formation requires its thickness >=0.5cm, this is because.As slurry thickness <0.5cm, colour difference meter there will be exposure phenomenon when measuring, thus makes measurement result occur deviation.
In the methods of the invention, shaping mesh number >=80 of described laboratory paper machine, this is to be consistent with the forming net on paper process slice production line as far as possible.
(2) mensuration of chromaticity index
Use the colourity of corrected color evaluating to the slurry filter cake that step (1) is formed to measure, obtain L ', a ', b ' value.
The application foundation of the inventive method is that CIE1976Lab uniform colour space is theoretical.CIE1976Lab(or CIEL*a*b*) chrominance space is the homogeneous color space that International Commission on Illumination in 1976 is recommended, the GB7921-87 that China in 1987 issues using LAB space as national standard.Current Color Scheme and the industry such as to copy in colour correction, calculating and DTP system, CIELAB space is commonly used.The inventive method application CIE1976Lab carries out apparatus measures and description to the color of slurry in paper process regeneration leaf tobacco production, and the color measured and Standard Colors is analyzed, thus provides foundation for production control.
The slurry filter cake that step (1) obtains by the comparatively smooth one side in the side of forming net upwards, for color measuring.Why use this one side, be because colour difference meter is in the process measured, need to ensure the smooth of object under test surface, thus measure more accurately.
In L*a*b* color specification system, L* value corresponds to the brightness value of look three elements, colourity a* value from red (+a*) to green (-a*) gradual change, b* value is from yellow (+b*) to blue (-b*) gradual change, true origin (a*=0, b*=0) be netrual colour point, the coordinate position of a certain color is more away from initial point, and its chroma is larger.Simultaneously the size of a*, b* value and ratio also determine the tone of this color.
In this step, need to utilize the colourity of instrument to the slurry filter cake that step (1) is formed to measure, thus obtain L ', a ', b ' value.
Wherein, operable instrument is the equipment extensively adopted in tobacco leaf production field, the full-automatic colour examining colour-difference-metre of DC-P3 type that such as Beijing emerging flash ranging look instrument company produces.
(3) color difference analysis
The absolute value of L ', a ' that calculating standard L, a, b value and step (2) obtain, the difference of b ' value, the i.e. absolute value △ b of the difference of the absolute value △ a and b and b ' of the absolute value △ L of the difference of L and L ', the difference of a and a ', judge that whether slurry aberration is qualified according to △ L, △ a and △ b, and according to this slurry aberration in production is controlled.
Wherein, calculating standard L, a, b value obtain with the slurry measurement corresponding to batch specification product on paper process slice production line.
The absolute value of L ', a ' that calculating standard L, a, b value and step (2) obtain, the difference of b ' value.That is:
△L=|L-L’|
△a=|a-a’|
△b=|b-b’|
When △ L, △ a, △ b are all less than 1.5, slurry aberration indifference can be thought.
Why adopting 1.5 here as standard, is because when △ L, △ a, a value in △ b are greater than 1.5, and naked eyes obviously can feel the change of aberration degree corresponding to L, a, b.
When △ L, △ a, △ b have one or several to be greater than 1.5, then judge with △ E method.The computing formula of △ E is as follows:
Wherein, aberration indifference is thought when △ E≤4; When △ E>4 then aberration there are differences.
Then can judge whether to need to adjust production run according to △ E, namely when △ E value is greater than 4, the production workshop section obtaining described tobacco slurry sample should adjust, to control slurry aberration in production.Why adopting 4 here as standard, is because when the value in △ E is greater than 4, and naked eyes obviously can feel the change of overall aberration.
Wherein, data processing and mapping can adopt MicrosoftExcel to carry out, and other process software also can be adopted to carry out.Data processing method does not limit in the methods of the invention.
[beneficial effect]
For in existing papermaking-method reconstituted tobaccos production run, solution is proposed to the weak link of tobacco slurry chromatism test, test result can be fed back in time, relevant each process section is helped to regulate in time, reduce and to be fluctuated the problem that the product color disqualification rate that causes raises by slurry aberration, effectively improve product quality.Method of testing is simple to operation, requires lower to tester.Because the method adopted is off-line test method, and combine the data analysis software such as Excel, can obtain testing result fast, and can not cause harmful effect to online production, checkout equipment input cost is lower.
[accompanying drawing explanation]
Fig. 1 represents the relation between filter cake solid content and aberration.
[embodiment]
Embodiment 1:
Obtain slurry A and three grades of corresponding defibrination material B before the online of certain specification product online, use described method to test, in filter cake preparation process, to batch de-watering of slurries different time under identical negative pressure, result is as shown in table 1.
The filter cake aberration of table 1. different water cut
RSD computing formula:
S is relative standard deviation (RSD), x
ifor the value of chromatism of sample,
for the mean value of sample value of chromatism, N is sample number.
Wherein, L, a, b standard value of slurry A is 40.60,6.62,20.46, and L, a, b standard value of slurry B is 37.90,6.85,18.36.
This standard value gets above-mentioned slurry A, B under the condition of normal temperature, pressure ﹣ 0.01 ~ ﹣ 0.10MPa, 80 order forming nets, dewatering time 120s, obtained by the mean value of L, a, b value calculating 100 groups of slurries.
As can be seen from Table 1, the relative standard deviation RSD of actual test value is all less than 1.5%, and test data is reliable, and carry out mapping analysis to the relation between filter cake solid content and aberration, result as shown in Figure 1.
As shown in Figure 1, the slope of slurry A and slurry B aberration L, a, b value fitting a straight line is all less than 0.02 close to 0, can think filter cake solid content in 8.86 ~ 9.78% scopes on aberration L, a, b value substantially without impact, and his-and-hers watches 1 two kinds of slurries survey L, a, b value extreme difference be less than 0.30 and filter cake moisture content be also described within the scope of this on slurry aberration without impact.
Embodiment 2:
Whether the finished product slurry and the tobacco slurry that obtain the different trade mark respectively use described method to test, and qualified with standard colors deviation testing slurry aberration, and test result is as shown in table 2.
Table 2. standard colors difference and comparing result
Wherein, the finished pulp of products C, L, a, b standard value of tobacco pulp are 46.55,6.00,15.33 and 32.00,5.22,12.11, the finished pulp of product D, L, a, b standard value of tobacco pulp are 56.19,6.05,18.84 and 38.89,5.79,19.55, and the finished pulp of product E, L, a, b standard value of tobacco pulp are 45.03,7.33,23.54 and 39.12,7.10,19.99.
This standard value gets the finished pulp of specification product C, D, E, tobacco pulp under the condition of normal temperature, pressure ﹣ 0.01 ~ ﹣ 0.10MPa, 80 order forming nets, dewatering time 120s, obtained by the mean value of L, a, b value calculating 100 groups of slurries.
As shown in Table 3, the relative standard deviation RSD of test value is all less than 1.5%, and test data is reliable.By test result and its standard colors difference comparing calculation, finished pulp, the tobacco pulp aberration of products C, D are all qualified, the △ E value of product E finished pulp is greater than 4, therefore the finished pulp acetes chinensis of product E is defective, and the △ L of product E tobacco pulp, △ a, △ b all≤1.5, the tobacco pulp aberration of product E is qualified, can infer according to this and cause the underproof workshop section of product E finished pulp aberration to be workshop section with slurry between finished pulp and tobacco pulp.
Claims (6)
1. the method for testing of tobacco slurry aberration in papermaking-method reconstituted tobaccos production run, is characterized in that described method comprises the steps:
(1) tobacco slurry filter cake is formed
Use shaping bucket with the laboratory page forming machine of vacuum dewatering apparatus, tobacco slurry is poured in the shaping bucket of laboratory page forming machine, carry out negative-pressure vacuum dehydration, until filter cake surrounding is separated with shaping bucket, obtain the filter cake that thickness is not less than 0.5cm, by transfer paper, described filter cake is transferred to operator's console, the one side comparatively smooth by forming net side is upwards to be measured;
(2) mensuration of chromaticity index
Use the colourity of corrected color evaluating to the slurry filter cake that step (1) is formed to measure, obtain L ', a ', b ' value;
(3) color difference analysis
Obtain the standard colorimetric of slurry filter cake, described standard colorimetric comprises L, a, b value, the absolute value of L ', a ' that calculating L, a, b value and step (2) obtain, the difference of b ' value, comprise the absolute value △ b of difference of absolute value △ a and b and b ' of the absolute value △ L of the difference of L and L ', the difference of a and a ', judge that whether slurry aberration is qualified according to △ L, △ a and △ b.
2. method according to claim 1, is characterized in that in step (1), and tobacco slurry is the different types of slurry of each workshop section being selected from tobacco pulp, plus fiber slurry or finished pulp.
3. method according to claim 1, is characterized in that in step (1), shaping mesh number >=80 of described laboratory paper machine.
4. method according to claim 1, is characterized in that the color evaluating used in step (2) is L, a, b type color evaluating.
5. method according to claim 1, to is characterized in that in step (3) that its criterion is according to △ L, △ a and △ b to the decision method of slurry aberration:
(1) if △ L, △ a, △ b are all less than 1.5 think slurry aberration indifference;
(2) if △ L, △ a, △ b have and be one or morely greater than 1.5, judge with △ E method, respective formula is as follows:
Wherein, aberration indifference is thought when △ E≤4; When △ E>4 then aberration there are differences.
6. method according to claim 5, is characterized in that when △ E value is greater than 4, adjusts the production workshop section obtaining described slurry, to control slurry aberration in production.
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| CN105181143A (en) * | 2015-09-21 | 2015-12-23 | 滁州卷烟材料厂 | Tipping paper chromatic aberration determination method |
| CN107328718A (en) * | 2017-05-31 | 2017-11-07 | 广东中烟工业有限责任公司 | A kind of quality Quick method using glyceryl triacetate as the flavouring essence for tobacco of solvent |
| CN108851180B (en) * | 2018-07-25 | 2021-02-02 | 湖北中烟工业有限责任公司 | Device and method for improving difference between two surfaces of coating weight of paper-making reconstituted tobacco |
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| CN101482493A (en) * | 2009-02-17 | 2009-07-15 | 云南昆船瑞升科技有限公司 | Appearance color detection method for reconstituted tobacco by papermaking method |
| CN101914875A (en) * | 2010-07-22 | 2010-12-15 | 东莞地龙纸业有限公司 | Method for adding surface glue dye |
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| CN101482493A (en) * | 2009-02-17 | 2009-07-15 | 云南昆船瑞升科技有限公司 | Appearance color detection method for reconstituted tobacco by papermaking method |
| CN101914875A (en) * | 2010-07-22 | 2010-12-15 | 东莞地龙纸业有限公司 | Method for adding surface glue dye |
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| 浅色纸色差控制的研究;王广玲;《工程科技I辑》;20080610(第12期);全文 * |
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