CN101398421A - Method for measuring leather sense characteristic parameters - Google Patents
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Abstract
The invention relates to a parameter measuring method for the organoleptic chracterisitcs of leather, which researches the parameters of the organoleptic characteristics of the leather from the aspect of the mechanical property of the leather and directly obtains the data of the mechanical property to establish the relation between the mechanical property and the organoleptic property of the leather by that the measurement to the compression, stretching, bending and top extension of the leather replaces the manual inspection. According to the correlation of a plurality of mechanical properties of the leather, such as compression property, stretching property, top extension property and bending property, and a plurality of parameters of the organoleptic characteristics of the leather, namely, softness, fullness and degree of elasticity and by measurement, not only a mathematical model between various parameters of the mechanical property of the leather and the parameters of the organoleptic characteristics of the leather is established, but also the grade estimation of the mathematical model of the comprehensive quality evaluation of the organoleptic characteristics of the leather, and the comprehensive property are given.
Description
Technical field
The present invention relates to a kind of assay method of leather parameter, be specifically related to a kind of assay method of leather sense characteristic parameter.
Background technology
The organoleptic attribute of leather is that people are in long term production, to the sense of touch of leather and the summary of vision combination property, be the sensation concentrated expression that staff touch and human eye are watched leather, it comprises pliability, DE, a series of impression such as richness, therefore it is a kind of sense feature, at present, the method for known evaluation leather sense characteristic is to continue to use leather testing staff's subjective inspection method always, and promptly hand is touched soon.Evaluation result is subjected to reviewer's professional skill, artistic appreciation, personal preference and amblent air temperature condition, even the influence of many subjective factors such as national customs and objective factor.
Summary of the invention
The object of the present invention is to provide a kind of assay method of leather sense characteristic parameter, this method not only can show the influence of the single supplemental characteristic of leather sense characteristic to overall leather sense characteristic, and can provide a leather aesthetic quality's comprehensive evaluation according to the data result of a plurality of data items.
For achieving the above object, the technical solution used in the present invention is:
1) at first, according to the light industry industry standard QB/T2464.2 of the People's Republic of China (PRC), the condition of the artificial atmosphere that the leather sample of employing carries out is: temperature is (65 ± 2) % for (20 ± 2) ℃, relative humidity;
2) compression performance parametric measurement
Under the artificial atmosphere condition, leather sample 3 grains upwards are placed on the compression table top 4, adopt the circular presser feet 2 parallel with compressing table top 4, test the drive lower compression leather sample 3 of circular presser feet 2 at constrictor 1, compression displacement s and force of compression f every the circular presser feet 2 of 0.1 second time keeping, unloading after keeping last force of compression to suspend 5 seconds, once more every the compression displacement s and the force of compression F of the circular presser feet 2 of 0.1 second time keeping, draw the curve of force of compression f and compression displacement s through data fitting, the compression performance loading curve is s=f (x)=kx+b, the compression performance unloading curve is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for loading curve intercept b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k that compression performance loads is big more to show that the pliability of leather is big more, the slope k of compression performance unloading ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, b ' is big more, and elastic space is big more, the area that compression performance loading curve and compression performance unloading curve surround is also big more, shows that DE is good more;
3) tensile property parametric measurement
Under the artificial atmosphere condition, leather sample 3 folder is wiped away on parallel, under measure chuck 5,6 li, upper grip 5 slowly stretches, write down stretching displacement s and tensile force f every 0.1 second, unloading after keeping last tensile force to suspend 5 seconds, once more every 0.1 second time keeping stretching displacement s and tensile force f, draw the curve of tensile force F and stretching displacement s through data fitting, the tensile property loading curve is s=f (x)=kx+b, the tensile property unloading curve is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for the loading curve intercept when the x=0, y=0, be b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k of tensile property loading curve is big more to show that the pliability of leather is big more, the slope k of tensile property unloading curve ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, b ' is big more, and elastic space is big more, and the also big more DE that shows of area that tensile property loading curve and tensile property unloading curve surround is good more;
4) bending property parametric measurement
Under the artificial atmosphere condition, leather sample 3 is bent to cylindric being placed on the lower platen 9, top board 8 slowly moves down under the drive of depression bar 7, write down bending displacement s and bending force f every 0.1 second, unloading after keeping last force of compression to suspend 5 seconds, write down bending displacement s and bending force f once more every 0.1 second, draw the curve of bending displacement s and bending force f through data fitting, the bending property loading curve is s=f (x)=a.exp (x)+b, the bending property unloading curve is s '=f (x)=a ' .exp (x)+b ', coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the slope a of bending property loading curve is big more to show that the pliability of leather is big more, the slope a ' of bending property unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and the also big more DE that shows of area that bending property loading curve and bending property unloading curve surround is good more;
5) measured performance parameter is stretched on the top
Under the artificial atmosphere condition, leather sample 3 is fastened on leather sample upper press ring 12 and the following pressure ring 13, boom 11 drive tops in top are stretched ball 10 and are moved up, stretch displacement s and power f is stretched on the top every 0.1 second top, unloading after keeping the last top power of stretching to suspend 5 seconds, stretch displacement s and power f is stretched on the top every 0.1 second record top once more, draw the curve of power and displacement through data fitting, it is s=f (x)=a.exp (x)+b that the performance loading curve is stretched on the top, it is s '=f (x)=a ' .exp (x)+b ' that the performance unloading curve is stretched on the top, coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the top stretches that the slope a of performance loading curve is big more to show that the pliability of leather is big more, the top stretches that the slope a ' of performance unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and it is good more that the top is stretched the performance loading curve and pushed up the also big more DE that shows of area of stretching the encirclement of performance unloading curve.
The present invention is from the organoleptic attribute parameter of the mechanical property aspect research leather of leather, replaces the check of staff by the leather sensory testing, avoided numerous and diverse mechanical analysis details, directly obtains mechanical performance data and sets up mechanical property and the organoleptic relation of leather.A plurality of mechanical properties according to leather, it is compression performance, tensile property, performance is stretched on the top, a plurality of organoleptic attribute parameters of bending property and leather are pliability, richness, the correlativity between the DE, not only set up the relation between each mechanical property parameters of leather and the leather sense characteristic parameter, and provided the method for measuring of leather sense characteristic parameter.
Description of drawings
Fig. 1 is that compression performance is measured synoptic diagram; 1 is constrictor among the figure, and 2 is circular presser feet, and 3 is leather sample, and 4 are the compression table top;
Fig. 2 is a compression performance data processing curve, and wherein horizontal ordinate is a force of compression, and ordinate is a compression displacement;
Fig. 3 is that tensile property is measured synoptic diagram; 5 is upper grip among the figure, and 6 is lower chuck, and 3 is leather sample
Fig. 4 is a tensile property data processing curve, and wherein horizontal ordinate is a tensile force, and ordinate is a stretching displacement;
Fig. 5 is that bending property is measured synoptic diagram; 7 is depression bar among the figure, and 8 is top board, and 3 is leather sample, and 9 is lower platen;
Fig. 6 is that bend performance data is handled curve, and wherein horizontal ordinate is a bending force, and ordinate is bending displacement;
Fig. 7 is that the performance measurement synoptic diagram is stretched on the top; 10 is that ball is stretched on the top among the figure, and 3 is leather sample, and 11 is the top boom, and 12 is upper press ring, and 13 are following pressure ring;
Fig. 8 is that performance data processing curve is stretched on the top, and wherein horizontal ordinate is stretched power for the top, and ordinate is stretched displacement for the top;
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
The measuring method of leather mechanical property parameters:
According to the regulation of the light industry industry standard QB/T2464.2 of the People's Republic of China (PRC), the condition of the artificial atmosphere that the leather sample of employing carries out is: temperature is (65 ± 2) % for (20 ± 2) ℃, relative humidity.
The compression performance parametric measurement
Compression performance determining instrument: referring to Fig. 1, the compression performance determining instrument comprises compression table top 4, and the diameter that parallels with compression table top 4 is the circular presser feet 2 of 10mm, circular presser feet 2 is provided with constrictor 1, circular presser feet 2 its surface when any position all should parallel with the surface of compression table top 4, and its error should be in 0.05mm;
Assay method: be determined under the condition of satisfied temperature and humidity, leather sample 3 grains upwards are placed on the compression table top 4, adopt the circular presser feet 2 parallel with compressing table top 4, test the drive lower compression leather sample 3 of circular presser feet 2 at constrictor 1, compression displacement s and force of compression F every the circular presser feet 2 of 0.1 second time keeping, under the artificial atmosphere condition, unloading after keeping last force of compression to suspend 5 seconds, once more every the compression displacement s and the force of compression f of the circular presser feet 2 of 0.1 second time keeping, compression performance and leather sense characteristic parameter, it is leather softness, richness, the mathematical model relation of DE, draw the curve of force of compression f and compression displacement s through data fitting, for example adopt linear fit to obtain: referring to Fig. 2, compression performance loading curve 1 is s=f (x)=kx+b, compression performance unloading curve 2 is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for the loading curve intercept when the x=0, y=0, be b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k that compression performance loads is big more to show that the pliability of leather is big more, the slope k of compression performance unloading ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, and b ' is big more, and elastic space is big more, and the also big more DE that shows of area that compression performance loading curve and compression performance unloading curve surround is good more;
The tensile property parametric measurement
The tensile property testing tool: referring to Fig. 3, the tensile property testing tool comprises that the width of opposing parallel setting is 45,30 or the upper and lower mensuration chuck 5,6 of 10mm, and upper and lower mensuration chuck 5,6 both sides working surfaces parallel, and its error should be in 0.05mm;
Tensile property assay method: under the condition of satisfied temperature and humidity, leather sample 3 folder is wiped away on parallel, under measure chuck 5,6 li, upper grip 5 slowly stretches, write down stretching displacement s and tensile force F every 0.1 second, under the artificial atmosphere condition, unloading after keeping last tensile force to suspend 5 seconds, once more every 0.1 second time keeping stretching displacement s and tensile force F, tensile property and leather sense characteristic parameter, it is leather softness, richness, the mathematical model relation of DE, draw the curve of tensile force F and stretching displacement s through data fitting, for example adopt linear fit to obtain: referring to Fig. 4, tensile property loading curve 1 is s=f (x)=kx+b, tensile property unloading curve 2 is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for the loading curve intercept when the x=0, y=0, be b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k of tensile property loading curve is big more to show that the pliability of leather is big more, the slope k of tensile property unloading curve ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, b ' is big more, and elastic space is big more, and the also big more DE that shows of area that tensile property loading curve and tensile property unloading curve surround is good more;
The bending property parametric measurement
Bending property determining instrument: referring to Fig. 5, the bending property determining instrument comprises lower platen 9 and the top board 8 that be arranged in parallel with lower platen 9, upper and lower pressing plate 8,9 be arranged in parallel, and its error should be in 0.05mm when any position, and top board 8 is provided with depression bar 7;
Bending property assay method: leather sample 3 is bent to cylindric being placed on the lower platen 9, top board 8 slowly moves down under the drive of depression bar 7, write down bending displacement s and bending force F every 0.1 second, unloading after keeping last force of compression to suspend 5 seconds under the artificial atmosphere condition, write down bending displacement s and bending force F once more every 0.1 second, draw the curve of bending displacement s and bending force F through data fitting, for example adopt exponential fitting to obtain: referring to Fig. 6, the bending property loading curve is s=f (x)=a.exp (x)+b, the bending property unloading curve is s '=f (x)=a ' .exp (x)+b ', coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the slope a of bending property loading curve is big more to show that the pliability of leather is big more, the slope a ' of bending property unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and the also big more DE that shows of area that bending property loading curve and bending property unloading curve surround is good more;
Measured performance parameter is stretched on the top
The performance measurement instrument is stretched on the top: referring to Fig. 7, the top is stretched the performance measurement instrument and is comprised following pressure ring 13 and be arranged on down upper press ring 12 on the pressure ring 13, two upper press rings 12 are symmetrical arranged, top boom 11 and upper press ring 12, concentric and its error of pressure ring 13 should be in 0.05mm down, and also is equipped with to push up on top boom 11 and stretches ball 10;
The performance measurement method is stretched on the top: leather sample 3 is fastened on leather sample upper press ring 12 and the following pressure ring 13, boom 11 drive tops in top are stretched ball 10 and are moved up, stretch displacement s and power f is stretched on the top every 0.1 second top, under the artificial atmosphere condition, unloading after keeping the last top power of stretching to suspend 5 seconds, stretch displacement s and power f is stretched on the top every 0.1 second record top once more, referring to Fig. 8, for example adopt exponential fitting to obtain: the curve of drawing power and displacement through data fitting, it is s=f (x)=a.exp (x)+b that the performance loading curve is stretched on the top, it is s '=f (x)=a ' .exp (x)+b ' that the performance unloading curve is stretched on the top, coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the top stretches that the slope a of performance loading curve is big more to show that the pliability of leather is big more, the top stretches that the slope a ' of performance unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and it is good more that the top is stretched the performance loading curve and pushed up the also big more DE that shows of area of stretching the encirclement of performance unloading curve.
The present invention obtains expressing the organoleptic characteristic coefficient of leather according to the data processed result of multiple mechanical property, and the assessment characteristic coefficient obtains a comprehensive evaluation index.
Claims (1)
1, method for measuring leather sense characteristic parameters is characterized in that:
1) at first, according to the light industry industry standard QB/T2464.2 of the People's Republic of China (PRC), the condition of the artificial atmosphere that the leather sample of employing carries out is: temperature is (65 ± 2) % for (20 ± 2) ℃, relative humidity;
2) compression performance parametric measurement
Under the artificial atmosphere condition, leather sample 3 grains upwards are placed on the compression table top 4, adopt the circular presser feet 2 parallel with compressing table top 4, test the drive lower compression leather sample 3 of circular presser feet 2 at constrictor 1, compression displacement s and force of compression f every the circular presser feet 2 of 0.1 second time keeping, unloading after keeping last force of compression to suspend 5 seconds, once more every the compression displacement s and the force of compression F of the circular presser feet 2 of 0.1 second time keeping, draw the curve of force of compression f and compression displacement s through data fitting, the compression performance loading curve is s=f (x)=kx+b, the compression performance unloading curve is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for loading curve intercept b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k that compression performance loads is big more to show that the pliability of leather is big more, the slope k of compression performance unloading ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, b ' is big more, and elastic space is big more, the area that compression performance loading curve and compression performance unloading curve surround is also big more, shows that DE is good more;
3) tensile property parametric measurement
Under the artificial atmosphere condition, leather sample 3 folder is wiped away on parallel, under measure chuck 5,6 li, upper grip 5 slowly stretches, write down stretching displacement s and tensile force f every 0.1 second, unloading after keeping last tensile force to suspend 5 seconds, once more every 0.1 second time keeping stretching displacement s and tensile force f, draw the curve of tensile force F and stretching displacement s through data fitting, the tensile property loading curve is s=f (x)=kx+b, the tensile property unloading curve is s '=f (x)=k ' x+b ', slope k, k ' represents pliability and richness respectively, intercept b, the distortion of b ' expression leather, for the loading curve intercept when the x=0, y=0, be b=0, the initial deformation of expression leather is zero, the irreversible deformation of unloading curve intercept b ' ≠ 0 expression leather, the slope k of tensile property loading curve is big more to show that the pliability of leather is big more, the slope k of tensile property unloading curve ' big more shows that the richness of leather is big more, b ' influences the size of elastic space, b ' is big more, and elastic space is big more, and the also big more DE that shows of area that tensile property loading curve and tensile property unloading curve surround is good more;
4) bending property parametric measurement
Under the artificial atmosphere condition, leather sample 3 is bent to cylindric being placed on the lower platen 9, top board 8 slowly moves down under the drive of depression bar 7, write down bending displacement s and bending force f every 0.1 second, unloading after keeping last force of compression to suspend 5 seconds, write down bending displacement s and bending force f once more every 0.1 second, draw the curve of bending displacement s and bending force f through data fitting, the bending property loading curve is s=f (x)=a.exp (x)+b, the bending property unloading curve is s '=f (x)=a ' .exp (x)+b ', coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the slope a of bending property loading curve is big more to show that the pliability of leather is big more, the slope a ' of bending property unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and the also big more DE that shows of area that bending property loading curve and bending property unloading curve surround is good more;
5) measured performance parameter is stretched on the top
Under the artificial atmosphere condition, leather sample 3 is fastened on leather sample upper press ring 12 and the following pressure ring 13, boom 11 drive tops in top are stretched ball 10 and are moved up, stretch displacement s and power f is stretched on the top every 0.1 second top, unloading after keeping the last top power of stretching to suspend 5 seconds, stretch displacement s and power f is stretched on the top every 0.1 second record top once more, draw the curve of power and displacement through data fitting, it is s=f (x)=aexp (x)+b that the performance loading curve is stretched on the top, it is s '=f (x)=a ' exp (x)+b ' that the performance unloading curve is stretched on the top, coefficient a, a ' represents pliability and richness respectively, coefficient b, the distortion of b ' expression leather, for the loading curve coefficient when the x=0, y=0, it is b ≠ 0, the initial deformation of expression leather is zero, unloading curve coefficient b ' and (b '-b) ≠ 0 the expression leather irreversible deformation, the top stretches that the slope a of performance loading curve is big more to show that the pliability of leather is big more, the top stretches that the slope a ' of performance unloading curve is big more to show that the richness of leather is big more, (b '-b) influence the size of elastic space, (b '-b) big more elastic space is big more, and it is good more that the top is stretched the performance loading curve and pushed up the also big more DE that shows of area of stretching the encirclement of performance unloading curve.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778400A (en) * | 2012-07-13 | 2012-11-14 | 上海应用技术学院 | Leather performance index testing instrument |
| CN105510567A (en) * | 2015-12-31 | 2016-04-20 | 昆山阿基里斯人造皮有限公司 | Artificial leather flexibility detection equipment |
| CN109115999A (en) * | 2018-08-17 | 2019-01-01 | 准邦检测仪器（上海）有限公司 | A kind of method of test fabric performance parameters |
| CN110470541A (en) * | 2019-09-12 | 2019-11-19 | 珠海罗西尼表业有限公司 | The detection method of leather watchband pliability |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2323930B (en) * | 1997-03-21 | 2001-08-29 | Univ Hull | Testing apparatus |
| CN1255670C (en) * | 2003-12-31 | 2006-05-10 | 陕西科技大学 | Leather softness and fullness measuring and grading device |
| CN1261747C (en) * | 2004-02-18 | 2006-06-28 | 四川大学 | Quantitive investigating method and instrument for leather softness |
-
2008
- 2008-09-17 CN CN2008101509992A patent/CN101398421B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778400A (en) * | 2012-07-13 | 2012-11-14 | 上海应用技术学院 | Leather performance index testing instrument |
| CN105510567A (en) * | 2015-12-31 | 2016-04-20 | 昆山阿基里斯人造皮有限公司 | Artificial leather flexibility detection equipment |
| CN109115999A (en) * | 2018-08-17 | 2019-01-01 | 准邦检测仪器（上海）有限公司 | A kind of method of test fabric performance parameters |
| CN110470541A (en) * | 2019-09-12 | 2019-11-19 | 珠海罗西尼表业有限公司 | The detection method of leather watchband pliability |
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