CN102721608B - Test method for tensile strength of tobaccos reconstituted by papermaking method - Google Patents
Test method for tensile strength of tobaccos reconstituted by papermaking method Download PDFInfo
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Abstract
The invention relates to a test method for tensile strength of tobaccos reconstituted by a papermaking method, belonging to the technical field of testing of physical indexes of reconstituted tobaccos. The test method comprises the following steps of: preparing samples: preparing test samples from each uncut sample along the longitudinal direction and the horizontal direction of a paper web, testing the samples, cutting 10 rectangular long strips being 200mm*15mm, cutting rectangular long strips being 40mm*15mm, and selecting 30 complete long strips from one sample; correcting and adjusting an instrument; testing the tensile strength: adjusting the extension rate of the instrument to be 50mm/min plus or minus 0.5mm/min when the instrument is used for testing the tensile strength of the large samples, and adjusting the extension rate of the instrument to be 200mm/min plus or minus 0.5mm/min when the instrument is used for testing the tensile strength of the small samples; and calculating according to test results of the tensile strength, wherein the calculation result reserves two decimal fractions. The method disclosed by the invention has the advantages of safety, simplicity, convenience, accuracy and precision, and the tested indexes of the tobaccos reconstituted by the papermaking method can represent the physical properties of the tobaccos reconstituted by the papermaking method.
Description
Technical field:
The present invention relates to a kind of method of measuring papermaking-method reconstituted tobaccos tensile strength, belong to reconstituted tobacco physical index and measure field.
Background technology:
Tensile strength, refers to that, under test method defined terms, the maximum tension can bear before the sample fracture of unit width, represents with kN/m.
Papermaking-method reconstituted tobaccos should possess certain tensile strength, because meeting the coating treatment process in later stage, thus require sheet base to there is certain tensile strength, but tensile strength is not more high better, too high tensile strength is unfavorable for follow-up chopping operation, therefore manufacture paper with pulp as long as meet paper machine.
At present, domestic less to papermaking-method reconstituted tobaccos tensile strength study on determination method, only has YC/T16.3-2003 < < papermaking-method reconstituted tobaccos the 3rd part: paper process > > standard has only been carried out simple regulation to some physical and chemical indexs of papermaking-method reconstituted tobaccos product, the detection of most physical indexs is the GB detection methods that adopt paper and cardboard, and majority is that requirement working sample length and width are larger in the GB detection method of paper and cardboard, and papermaking-method reconstituted tobaccos finished product is all the sample of small pieces at present, therefore, the detection method of indiscriminately imitating paper and cardboard is obviously improper.In addition, papermaking-method reconstituted tobaccos is different from paper and tobacco leaf, the measurement range of its tensile strength and paper and tobacco leaf have bigger difference especially, therefore, be necessary to explore a kind of tensile strength assay method that is applicable to papermaking-method reconstituted tobaccos, for the tensile strength of assay reconstituted tobacco provides certain reference.
By literature search, have no the open report identical with the present invention.
Summary of the invention:
The object of the present invention is to provide a kind of safe, easy, method of accurately and accurately measuring papermaking-method reconstituted tobaccos tensile strength, by these indexs, characterize the physical features of reconstituted tobaccos.
The concrete steps of mensuration papermaking-method reconstituted tobaccos method of the present invention are as follows:
(1) preparation of sample
A. to measuring without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, require to prepare respectively sample along the longitudinal and transverse direction of paper web; Choose without any damage, the position of no-watermark, folding line, cuts and gets the rectangular rectangular of 10 200mm * 15mm with cutting means with upper part at sample edge 15mm;
B. to measuring, cut or beat the papermaking-method reconstituted tobaccos finished product after leaf, with cutting means, to cut into the rectangular rectangular of 40mm * 15mm, sample choose 30 intact rectangular;
C. two of sample limits should be straight, and its depth of parallelism should be within ± 0.1mm, and otch is neat, without any damage, and no-watermark, folding line;
C. above-mentioned sample is 22 ℃ ± 1 ℃ in temperature, balance 48h in the climatic chamber that relative humidity is 60% ± 3%;
(2) calibration of instrument and adjusting
Substantially according to conventional method, calibrate and regulate, wherein:
A. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, regulate clip position to make test length, the mean distance between clamp is 100mm ± 1mm; The papermaking-method reconstituted tobaccos finished product after leaf is cut or beaten to mensuration, regulates clip position to make test length, and the mean distance between clamp is 20mm ± 1mm; The thin aluminium foil of a slice is clipped between two chucks, measures the distance between two marks that thin aluminium foil produces because of clamping, and check measured length whether accurate with this;
B. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, adjust the rate of extension of instrument to 50mm/min ± 0.5mm/min; The papermaking-method reconstituted tobaccos finished product after leaf is cut or beaten to mensuration, adjusts the rate of extension of instrument to 200mm/min ± 0.5mm/min; Regulate clamp pressure, make sample not only without slippage but also not damaged;
(3) mensuration of tensile strength
Under the test atmospheric environment of GB/T1644 regulation, sample is tested;
A. measure the papermaking-method reconstituted tobaccos sample of not cutting, adjust the rate of extension of instrument to 50mm/min ± 0.5mm/min; Measure papermaking-method reconstituted tobaccos finished product, adjust the rate of extension of instrument to 200mm/min ± 0.5mm/min;
B. chuck is adjusted to the test length of regulation, length value, the width value of input sample clamp sample on chuck, guarantee that sample is parallel to applied tension direction, carry out tension stress zero clearing and displacement zero clearing;
C. from instrument, directly read stretch at breaking point and tension stress;
D. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, require longitudinal and transverse direction to measure respectively 10 samples, the net result of a sample is respectively with the arithmetic mean value representation of 10 Specimen Determination results, and numerical value represents with N;
E. measure and cut or beat the papermaking-method reconstituted tobaccos finished product after leaf, require to measure 30 samples, the net result of a sample is with the arithmetic mean value representation of 30 Specimen Determination results, and numerical value represents with N;
(4) the tensile strength S of sample calculates by formula (1): numerical value represents with kN/m, and result remains to two-decimal;
S=F/W…………………………（1）
In formula:
S-sample tensile strength, kN/m;
The tension stress of F-sample mean, N;
W-specimen width, mm.
Method of the present invention has safe, easy, accurate and accurate advantage, and the papermaking-method reconstituted tobaccos tensile strength index of mensuration can characterize the physical characteristics of reconstituted tobacco.
Embodiment:
The concrete steps that the method for mensuration papermaking-method reconstituted tobaccos tensile strength of the present invention is partly described by summary of the invention are carried out.
1. experimental cultivar is to get the different representative papermaking-method reconstituted tobaccos sample of not cutting (being entrusted the sample of external processing by domestic certain enterprise), be designated as respectively A1, A2, A3, B1, B2, B3, C1, C2 and the papermaking-method reconstituted tobaccos sample (product of domestic certain reconstituted tobacco manufacturing enterprise) of cutting, be designated as respectively D1, D2, D3.
2. test apparatus: the observing and controlling of KW-3 computer resists strong strength-testing machine (the Changjiang river, Sichuan papermaking instrument Ltd); Standard hand papercutter (the Changjiang river, Sichuan papermaking instrument Ltd).
3. the result of tensile strength method, by the papermaking-method reconstituted tobaccos sample that 7 are not cut, press said determination method, 10 rectangular tensile strength longitudinally of each sample determination, table 1 is that the statistic of the papermaking-method reconstituted tobaccos sample of not cutting (folder is apart from 100mm) machine direction tensile strength is described.Can find out, 7 sample tensile strength determination data RSD, below 25%, illustrate that the method is more stable, data rationally, effectively, to compare RSD less with tobacco leaf, and also, from this angle explanation of tensile strength, papermaking-method reconstituted tobaccos and tobacco leaf have obvious difference.
The statistic of the papermaking-method reconstituted tobaccos sample that table 1 is not cut (folder is apart from 100mm) machine direction tensile strength is described
Table 2 is the papermaking-method reconstituted tobaccos samples of not cutting, and folder distance is the measurement result of the cross direction tensile strength of 100mm, and these data have been carried out to statistic description.In table, find out, the data RSD of mensuration, below 26%, illustrates that the method is more stable, and data rationally effectively.Compare with table 1, cross direction tensile strength is significantly less than machine direction tensile strength.
The statistic of the papermaking-method reconstituted tobaccos sample that table 2 is not cut (folder is apart from 100mm) cross direction tensile strength is described
Because the length and width of papermaking-method reconstituted tobaccos finished product are significantly less than paper, thus can not blindly indiscriminately imitate the assay method of paper, because find that according to test repeatedly scope and paper, the tobacco leaf of the tensile strength of papermaking-method reconstituted tobaccos finished product have obvious difference.So, according to actual conditions, be provided with folder distance: 20mm, 30mm; Be provided with 2 rate of extension: 50mm/min, 200mm/min; The test design of different folder distances and rate of extension 4 processing: folder is abbreviated as 20-50 apart from 20mm-rate of extension 50mm/min(); Folder is abbreviated as 20-200 apart from 20mm-rate of extension 200mm/min(); Folder is abbreviated as 30-50 apart from 30mm-rate of extension 50mm/min(); Folder is abbreviated as 30-200 apart from 30mm-rate of extension 200mm/min().The statistic of the papermaking-method reconstituted tobaccos finished product tensile strength of 4 processing is described, as table 3.Result shows, the RSD minimum of 20-200 measurement result, and therefore selected folder is apart from 20mm, and rate of extension 200mm/min is the test condition of mensuration papermaking-method reconstituted tobaccos tensile strength.
The statistic of table 3 papermaking-method reconstituted tobaccos finished product tensile strength is described
From result table 1,2 and 3, find out, the method provides certain reference in the time of spending to the tensile strength of papermaking-method reconstituted tobaccos workers test sample, also for carrying out from now on the work of related fields, established certain basis.
Claims (1)
1. measure a method for papermaking-method reconstituted tobaccos tensile strength, the concrete steps that it is characterized in that measuring papermaking-method reconstituted tobaccos tensile strength are as follows:
(1) preparation of sample
A. to measuring without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, require to prepare respectively sample along the longitudinal and transverse direction of paper web; Choose without any damage, the position of no-watermark, folding line, cuts and gets the rectangular rectangular of 10 200mm * 15mm with cutting means with upper part at sample edge 15mm;
B. to measuring, cut or beat the papermaking-method reconstituted tobaccos finished product after leaf, with cutting means, to cut into the rectangular rectangular of 40mm * 15mm, sample choose 30 intact rectangular;
C. two of sample limits should be straight, and its depth of parallelism should be within ± 0.1mm, and otch is neat, without any damage, and no-watermark, folding line;
D. above-mentioned sample is 22 ℃ ± 1 ℃ in temperature, balance 48h in the climatic chamber that relative humidity is 60% ± 3%;
(2) calibration of instrument and adjusting
Substantially according to conventional method, calibrate and regulate, wherein:
A. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, regulate clip position to make test length, the mean distance between clamp is 100mm ± 1mm; The papermaking-method reconstituted tobaccos finished product after leaf is cut or beaten to mensuration, regulates clip position to make test length, and the mean distance between clamp is 20mm ± 1mm; The thin aluminium foil of a slice is clipped between two chucks, measures the distance between two marks that thin aluminium foil produces because of clamping, and check measured length whether accurate with this;
B. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, adjust the rate of extension of instrument to 50mm/min ± 0.5mm/min; The papermaking-method reconstituted tobaccos finished product after leaf is cut or beaten to mensuration, adjusts the rate of extension of instrument to 200mm/min ± 0.5mm/min; Regulate clamp pressure, make sample not only without slippage but also not damaged;
(3) mensuration of tensile strength
Under the test atmospheric environment of GB/T1644 regulation, sample is tested;
A. measure the papermaking-method reconstituted tobaccos sample of not cutting, adjust the rate of extension of instrument to 50mm/min ± 0.5mm/min; Measure papermaking-method reconstituted tobaccos finished product, adjust the rate of extension of instrument to 200mm/min ± 0.5mm/min;
B. chuck is adjusted to the test length of regulation, length value, the width value of input sample clamp sample on chuck, guarantee that sample is parallel to applied tension direction, carry out tension stress zero clearing and displacement zero clearing;
C. from instrument, directly read stretch at breaking point and tension stress;
D. measure without cutting or the papermaking-method reconstituted tobaccos sample of economy-combat leaf not, require longitudinal and transverse direction to measure respectively 10 samples, the net result of a sample is respectively with the arithmetic mean value representation of 10 Specimen Determination results, and numerical value represents with N;
E. measure and cut or beat the papermaking-method reconstituted tobaccos finished product after leaf, require to measure 30 samples, the net result of a sample is with the arithmetic mean value representation of 30 Specimen Determination results, and numerical value represents with N;
(4) the tensile strength S of sample calculates by formula (1): numerical value represents with kN/m, and result remains to two-decimal;
S=F/W…………………………（1）
In formula:
S-sample tensile strength, kN/m;
The tension stress of F-sample mean, N;
W-specimen width, mm.
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| CN104390857A (en) * | 2014-10-23 | 2015-03-04 | 中国海诚工程科技股份有限公司 | Method for measuring brittleness of tobacco slice prepared by paper making method |
| CN106442032A (en) * | 2015-08-07 | 2017-02-22 | 中国科学院宁波材料技术与工程研究所 | Scanning electron microscopy sample production method of coated white cardboard fracture |
| CN108333106A (en) * | 2018-01-23 | 2018-07-27 | 上海烟草集团有限责任公司 | The assay method of adhesion strength between a kind of tobacco sheets by paper making method |
| CN111537346B (en) * | 2020-05-12 | 2023-08-29 | 江苏中烟工业有限责任公司 | Tensile strength detection method for reconstituted tobacco finished product |
| CN112711890B (en) * | 2021-01-19 | 2023-03-10 | 永发（河南）模塑科技发展有限公司 | Structure optimization method of paper pulp molding packaging product |
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| CN101900673A (en) * | 2010-06-02 | 2010-12-01 | 北京林业大学 | Method of on-line non-destructive testing paper performance |
| CN202057548U (en) * | 2010-07-26 | 2011-11-30 | 上海伦恩通用技术有限公司 | Novel paper tensile strength test machine |
| CN102288487A (en) * | 2011-07-21 | 2011-12-21 | 云南瑞升烟草技术（集团）有限公司 | Tensile strength measuring method for tobacco leaves |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104749027A (en) * | 2013-12-27 | 2015-07-01 | 湖北烟草金叶复烤有限责任公司襄阳复烤厂 | Hook and pull type tobacco strength detection device |
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