CN102288487A - Tensile strength measuring method for tobacco leaves - Google Patents
Tensile strength measuring method for tobacco leaves Download PDFInfo
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- CN102288487A CN102288487A CN2011102054587A CN201110205458A CN102288487A CN 102288487 A CN102288487 A CN 102288487A CN 2011102054587 A CN2011102054587 A CN 2011102054587A CN 201110205458 A CN201110205458 A CN 201110205458A CN 102288487 A CN102288487 A CN 102288487A
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Abstract
The invention discloses a tensile strength measuring method for tobacco leaves, which comprises the following steps of: placing two handfuls of bundled tobaccos in an ambient condition with a temperature of 22(+/-)1 DEG C and a relative humidity of 70(+/-)3% for balancing for 2-3 days until the moisture of tobacco leaves reaches (17(+/-)1)%, randomly extracting ten tobacco leaves, taking a widest position in the middle of each tobacco leaf, cutting a rectangular strip sample with a width of 1.5 cm along the growth direction of a lateral vein; measuring the tensile strength of the samples by using a computer measuring and control tensile testing machine and adopting a constant-speed stretching method, wherein in a measuring process, two long sides of each sample are parallel straight sides with a parallelism within (+/-)0.1 mm; the measurement is quantified to be 120 g/m<2>; the testing speed is 10% of the initial length of the samples; a clamping distance of clamping the samples is a result of subtracting 2 centimeters from the initial length of the samples; in the measuring process, an ambient temperature is 22(+/-)1 DEG C; and the relative humidity is 70(+/-)3%; and finally, calculating the average value of the tensile strength obtained by measuring the ten samples, namely the tensile strength of a test piece. The calculation result is precise to 0.001. By using the method, the tensile strength of the tobacco leaves can be measured normatively and accurately, and the reliable evidence is provided for evaluating the quality of the tobacco leaves.
Description
Technical field
The invention belongs to a kind of tobacco leaf physical index assay method, what be specifically related to is tobacco leaf tensile strength assay method.
Background technology
The tobacco leaf tensile strength is meant the maximum external force that institute can bear when the unit area tobacco leaf was stretched to fracture under certain moisture condition, has reflected the development condition and the maturity of tobacco leaf to a certain extent, is one of important indicator of evaluation tobacco leaf physical quality.Pulling force size is in close relations with quality of tobacco, and quality of tobacco is big more, and to bear the ability of external force strong more, and flexibility is good more, in the commercial Application process, make broken less, the availability height.
Though the tobacco leaf tensile strength very important factor that is the quality of tobacco evaluation, because the difficulty of its mensuration makes its rarely seen report in document analysis.At present, have authors such as Liu Li have addressed tobacco tension in its paper " the relation research of flue-cured tobacco pulling force and main chemical compositions " analysis only, but its assay method is indeterminate, does not have the experimental implementation directiveness.Thereby, be necessary to provide a kind of assay method of tobacco leaf tensile strength, so that experimental implementation, analysis and research.
Summary of the invention
The objective of the invention is to solve the deficiencies in the prior art a kind of method of measuring the tobacco leaf tensile strength is provided.
Purpose of the present invention is achieved through the following technical solutions.
A kind of tobacco leaf tensile strength assay method comprises the steps:
(1) preparation of sample: with two cigarette being seated in temperature is 22 ℃ ± 1 ℃, relative humidity is under 70% ± 3% the environmental baseline balance 2-3 days, reach (17 scholar 1) % to moisture content in leaves, randomly draw 10 tobacco leaves, get every tobacco leaf middle part the widest part and determine the rectangular sample of rectangle that width is 1.5cm along the lateral vein direction of growth;
(2) institute is cut out sample with computer observing and controlling tensile testing machine, adopts the constant speed pulling method to carry out the mensuration of tensile strength, during mensuration, two long limits of sample be the depth of parallelism ± 0.1mm is with interior flat side, measuring quantitatively is 120g/m
2, test speed is 10% of a sample initial length, and the folder of clamped sample is apart from deducting 2 centimetres for the sample initial length, and the environment temperature during mensuration is 22 ℃ ± 1 ℃, relative humidity 70% ± 3%;
(3) calculate 10 samples and measure the tensile strength mean value that obtains, be the tensile strength of this sample, result of calculation is accurate to 0.001.
Adopt the inventive method, determine to cut the position earlier before cutting rectangular sample, the moisture of determining to cut the position again balance to blade feels like jelly, be difficult for broken, determine to cut the length of sample at last according to the tobacco leaf size, no tangible folding line and breach in the specimen test area, the neat not damaged of sample otch.
The total sheet number of used two tobacco leaves cigarette of the present invention is 50 ± 5.
But the present invention's standard is measured the tensile strength of tobacco leaf exactly, for the quality of tobacco evaluation provides reliable foundation.According to the actual conditions of tobacco sample clear and definite sampling requirement and experimental situation condition, test workablely, can regulate experiment parameter at different laboratory samples, so that sample quality difference is understood in parallel comparison.
Description of drawings
Fig. 1 is for cutting the sample synoptic diagram.
Embodiment
Tobacco leaf tensile strength assay method, take off two canopy tobacco leaves two about 50 tobacco leaves of cigarette, by the operation of following step:
(1) preparation of sample: with two cigarette being seated in temperature is 22 ℃ ± 1 ℃, relative humidity is under 70% ± 3% the environmental baseline balance 2-3 days, reach (17 scholar 1) % to moisture content in leaves, randomly draw 10 tobacco leaves, get every tobacco leaf middle part the widest part and determine the rectangular sample of rectangle that width is 1.5cm along the lateral vein direction of growth.When cutting sample, as shown in Figure 1, avoid the thicker lateral vein 2 of tobacco leaf 1, in the middle of tobacco leaf, cut sample 3.Determine to cut the position earlier before cutting rectangular sample, the moisture of determining to cut the position again balance to blade feels like jelly, and is difficult for brokenly, determines to cut the length of sample at last according to the tobacco leaf size.Because the leaf broad of two canopy tobacco leaves is round down, blade is bigger, so cut the rectangular sample of the rectangle of 1.5 * 15cm when specimen preparation.Do not have in the specimen test area that cuts tangible folding line and breach, the sample otch is not damaged neatly.
(2) institute is cut out sample and uses DCP-KZ300A (R) type computer observing and controlling tensile testing machine, adopt the constant speed pulling method to carry out the mensuration of tensile strength, during mensuration, two long limits of sample be the depth of parallelism ± 0.1mm is with interior flat side, measuring quantitatively is 120g/m
2, test speed is 15mm/min, and the folder of clamped sample is apart from being 130mm, and the environment temperature during mensuration is 22 ℃ ± 1 ℃, relative humidity 70% ± 3%;
(3) calculate 10 samples and measure the tensile strength mean value that obtains, be the tensile strength of this sample, result of calculation is accurate to 0.001.
In view of the singularity (tobacco leaf is divided into upper, middle and lower portion tobacco leaf, and tobacco leaf length is different) of tobacco leaf sample, brought bigger difficulty for the preparation of sample, therefore can be at the tobacco leaf sample of different parts, the length of the rectangular sample of rectangle that cuts also can appropriateness be adjusted.Parameter setting when corresponding tensile testing machine is measured also can be adjusted, and setting principle is: test speed is 10% of a sample initial length, and folder is apart from deducting 2cm for initial length, and is quantitatively constant.
For fear of personal error, entire test is not used the pilot region that hand directly contacts sample, must wear disposable or the lightweight cotton gloves, does not stay any perceptible relaxing when clamping medicine, guarantees that sample is parallel to the tension direction that is applied.
The waist leaf of getting leaf broad is measured the tobacco leaf tensile strength as follows to two about 45～50 tobacco leaves of cigarette:
(1) with two cigarette being placed on temperature is 22 ℃ ± 1 ℃, under the environmental baseline of relative humidity 70% ± 3% balance 2-3 days, make moisture content in leaves reach (17 scholar 1) %, randomly draw 10 tobacco leaves, get every tobacco leaf middle part the widest part and cut sample along the lateral vein direction of growth, cut the rectangular sample of the rectangle that obtains 10 1.5 * 12cm altogether, do not have in the specimen test area tangible folding line and breach, otch is not damaged neatly.
(2) institute is cut out sample and use DCP-KZ300A (R) type computer observing and controlling tensile testing machine, adopt the constant speed pulling method to carry out the mensuration of tensile strength, two long limits of sample should be straight, and its depth of parallelism is in ± 0.1mm.Correlation parameter during mensuration is set as follows: quantitative 120g/m
2, test speed 12mm/min, folder is apart from 100mm, and environment temperature is 22 ℃ ± 1 ℃, relative humidity 70% ± 3%.
(3) 10 sample tensile strength mean values that obtain with mensuration are as the tensile strength of this tobacco leaf, and result of calculation is accurate to 0.001.
Embodiment 3
Get two canopy tobacco leaves two about 50～55 tobacco leaves of cigarette, measure the tobacco leaf tensile strength as follows:
(1) preparation sample: with two cigarette being placed on temperature is 22 ℃ ± 1 ℃, under the environmental baseline of relative humidity 70% ± 3% balance 2-3 days, make sample moisture reach (17 scholar 1) %, randomly draw 10 tobacco leaves, get tobacco leaf middle part the widest part and cut the rectangular sample of the rectangle that obtains 10 1.5 * 10cm along the lateral vein direction of growth, do not have in the specimen test area tangible folding line and breach, otch is not damaged neatly.
(2) sample that cut is used DCP-KZ300A (R) type computer observing and controlling tensile testing machine, adopt the constant speed pulling method to carry out the mensuration of tensile strength, two limits of sample should be straight, and its depth of parallelism is in ± 0.1mm.Correlation parameter during mensuration is set at: quantitative 120g/m
2, test speed 10mm/min, folder is apart from 80mm, and environment temperature is 22 ℃ ± 1 ℃, relative humidity 70% ± 3%.
(3) calculate the mean value of 10 sample tensile strength, be the tensile strength of the tobacco leaf of taking a sample, result of calculation is accurate to 0.001.
Claims (3)
1. a tobacco leaf tensile strength assay method is characterized in that, comprises the steps:
(1) preparation of sample: with two cigarette being seated in temperature is 22 ℃ ± 1 ℃, relative humidity is under 70% ± 3% the environmental baseline balance 2-3 days, reach (17 scholar 1) % to moisture content in leaves, randomly draw 10 tobacco leaves, get every tobacco leaf middle part the widest part and determine the rectangular sample of rectangle that width is 1.5cm along the lateral vein direction of growth;
(2) institute is cut out sample with computer observing and controlling tensile testing machine, adopts the constant speed pulling method to carry out the mensuration of tensile strength, during mensuration, two long limits of sample be the depth of parallelism ± 0.1mm is with interior flat side, measuring quantitatively is 120g/m
2, test speed is 10% of a sample initial length, and the folder of clamped sample is apart from deducting 2 centimetres for the sample initial length, and the environment temperature during mensuration is 22 ℃ ± 1 ℃, relative humidity 70% ± 3%;
(3) calculate 10 samples and measure the tensile strength mean value that obtains, be the tensile strength of this sample, result of calculation is accurate to 0.001.
2. a kind of tobacco leaf tensile strength assay method as claimed in claim 1, it is characterized in that, determine to cut the position earlier before cutting rectangular sample, the moisture of determining to cut the position again balance to blade feels like jelly, be difficult for broken, determine to cut the length of sample at last according to the tobacco leaf size, no tangible folding line and breach in the specimen test area, the neat not damaged of sample otch.
3. a kind of tobacco leaf tensile strength assay method as claimed in claim 1 is characterized in that, two total sheet numbers of the tobacco leaf cigarette are 50 ± 5.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589967A (en) * | 2012-01-18 | 2012-07-18 | 中国烟草总公司郑州烟草研究院 | Method for measuring puncture strength of tobacco |
| CN102721608A (en) * | 2012-07-02 | 2012-10-10 | 云南烟草科学研究院 | Test method for tensile strength of tobaccos reconstituted by papermaking method |
| CN103439141A (en) * | 2013-08-27 | 2013-12-11 | 中国农业科学院棉花研究所 | Functional leaf sampler |
| 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 |
| CN105738203A (en) * | 2016-02-26 | 2016-07-06 | 江苏省中国科学院植物研究所 | New method for conveniently and rapidly evaluating turfgrass abrasion resistance |
| CN109307731A (en) * | 2017-07-27 | 2019-02-05 | 红塔烟草(集团)有限责任公司 | A kind of tobacco leaf position method of discrimination and device |
| CN109900755A (en) * | 2019-04-25 | 2019-06-18 | 云南中烟工业有限责任公司 | A kind of detection method of fresh tobacco leaves oil |
| CN109916970A (en) * | 2019-04-25 | 2019-06-21 | 云南中烟工业有限责任公司 | A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor |
| CN109916969A (en) * | 2019-04-25 | 2019-06-21 | 云南中烟工业有限责任公司 | A kind of fast non-destructive detection method of the fresh tobacco leaves alkaloid based on capacitor |
| CN109946343A (en) * | 2019-04-28 | 2019-06-28 | 云南中烟工业有限责任公司 | A kind of detection method of quick nondestructive fresh tobacco leaves oil |
| CN109959680A (en) * | 2019-04-28 | 2019-07-02 | 云南中烟工业有限责任公司 | A kind of method of Fast nondestructive evaluation fresh tobacco leaves ash content |
| CN111537346A (en) * | 2020-05-12 | 2020-08-14 | 江苏中烟工业有限责任公司 | Tensile strength detection method for reconstituted tobacco finished product |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589967A (en) * | 2012-01-18 | 2012-07-18 | 中国烟草总公司郑州烟草研究院 | Method for measuring puncture strength of tobacco |
| CN102721608A (en) * | 2012-07-02 | 2012-10-10 | 云南烟草科学研究院 | Test method for tensile strength of tobaccos reconstituted by papermaking method |
| CN103439141A (en) * | 2013-08-27 | 2013-12-11 | 中国农业科学院棉花研究所 | Functional leaf sampler |
| 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 |
| CN105738203A (en) * | 2016-02-26 | 2016-07-06 | 江苏省中国科学院植物研究所 | New method for conveniently and rapidly evaluating turfgrass abrasion resistance |
| CN109307731B (en) * | 2017-07-27 | 2024-01-26 | 红塔烟草(集团)有限责任公司 | Tobacco leaf part discriminating method and device |
| CN109307731A (en) * | 2017-07-27 | 2019-02-05 | 红塔烟草(集团)有限责任公司 | A kind of tobacco leaf position method of discrimination and device |
| CN109900755A (en) * | 2019-04-25 | 2019-06-18 | 云南中烟工业有限责任公司 | A kind of detection method of fresh tobacco leaves oil |
| CN109916969A (en) * | 2019-04-25 | 2019-06-21 | 云南中烟工业有限责任公司 | A kind of fast non-destructive detection method of the fresh tobacco leaves alkaloid based on capacitor |
| CN109916970A (en) * | 2019-04-25 | 2019-06-21 | 云南中烟工业有限责任公司 | A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor |
| CN109946343A (en) * | 2019-04-28 | 2019-06-28 | 云南中烟工业有限责任公司 | A kind of detection method of quick nondestructive fresh tobacco leaves oil |
| CN109959680A (en) * | 2019-04-28 | 2019-07-02 | 云南中烟工业有限责任公司 | A kind of method of Fast nondestructive evaluation fresh tobacco leaves ash content |
| CN111537346A (en) * | 2020-05-12 | 2020-08-14 | 江苏中烟工业有限责任公司 | Tensile strength detection method for reconstituted tobacco finished product |
| 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 |
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Application publication date: 20111221 |