CN102230905A - Standard testing method of leather shrinking temperature - Google Patents
Standard testing method of leather shrinking temperature Download PDFInfo
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- CN102230905A CN102230905A CN2011100914964A CN201110091496A CN102230905A CN 102230905 A CN102230905 A CN 102230905A CN 2011100914964 A CN2011100914964 A CN 2011100914964A CN 201110091496 A CN201110091496 A CN 201110091496A CN 102230905 A CN102230905 A CN 102230905A
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- 239000010985 leather Substances 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 5
- 238000011160 research Methods 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a standard testing method of leather shrinking temperatures. With shrinking deformation of a larger proportion (for example, 10% of a total length), accurate and reliable collection of shrinking deformation signals after a leather sample is heated can be ensured, and anti-interference capacity of a system can be improved. A constant-temperature heating medium temperature corresponding to an initial shrinking deformation (wherein a maximal length is shrunken by 0.3%) is searched and acquired from data stored in a master computer, and is displayed and locked. The temperature is regarded as a shrinking temperature of the tested leather sample. Therefore, correlative measuring conditions in national testing standards are completely satisfied, thermal stability is expanded from a shrinking point to an entire heating process, and the information is displayed or stored in forms of curves and data. The original data provides conditions for professional stuffs in leather field to carry out comprehensive, thorough and high-level researches.
Description
Technical field
The present invention relates to a kind of leather shrinking temperature detection method, particularly a kind ofly can satisfy the leather shrinking temperature standard detecting method fully.
Technical background
Shrinkage temperature (Ts) is an important parameter that characterizes the leather substance thermal stability, specifically refer to begin to produce pairing temperature when shrinking deformation after leather is heated in specific environment, according to the examination criteria of country about Ts: the moment that deformation clearly will be shunk in mensuration (QB/T2713-2005) lining that leather physics and mechanical test shrink temperature specifically is quantified as " maximum length contraction 0.3% " (i.e. 6.8 middle inspection record data or indicator and formed curve of relevant temperature, find out the corresponding temperature of sample, write down this temperature) as shrinkage temperature from maximum length contraction 0.3%.Along with leather industry by workshop-based transformation to large-scale industrial production, detect leather Ts fast and accurately, leather processing production technology and deep professional Research Significance are great for instructing timely and effectively.But the present instrument of all measurement shrinkage temperatures both at home and abroad, no matter be the most original " GJ901 type pointer-type " leather shrinkage temperature tester, still along with electronic technology develops " the digital leather shrinkage temperature tester of MSW-YD4 " (Shaanxi Tech Univ's sunlight electronics Research Institute) of successively developing and providing " Hg shrinkage temperature registering instrument " (the common development and production of bright company of Chengdu birch and Sichuan University) in market and occupy domestic and international advanced level; All can't be achieved: as for pointer analyzer because can not accurately finishing the detection that changes total length 0.3%, to gather the curve that a secondary data draws in 30 seconds be very coarse relatively, and the relevant temperature that search length changed 0.3% o'clock is actually and can't realizes; And for the digital detecting instrument of robotization, shrink deformation (displacement) sensor in the heating complex environment, detect accurately and reliably 0.15mm (be the sample total length be 50mm 0.3%) displacement very big difficulty is still arranged.So in order to provide its reliable skin sample to shrink deformation signal, generally all set total length contraction change 10% or when bigger the temperature of correspondence as Ts; Otherwise heating medium in the measuring process that reaches about a hour (water or glycerine) after all the conduct skin sample of possible errors is heated to the various interference that certainly exist in the inevitable environmental impact (deformation＞0.3%) of leather sample and the circuit the contraction deformation signal and by computing machine erroneous judgement back as Ts and locked, make it can't operate as normal.
So seek and a kind ofly can either obtain the signal that the leather sample really shrinks deformation accurately and reliably, again can in strict accordance with in the leather shrinking temperature examination criteria be subjected to thermal deformation 0.3% about detected leather sample the time correspondence temperature just extremely important as its Ts.
Summary of the invention
The object of the present invention is to provide a kind of not only can the eliminating to detect the influence of inevitably disturbing in on-the-spot various environmental factors and the signal processing circuit, can guarantee to gather accurately and reliably the be heated leather shrinking temperature standard detecting method of post shrinkage deformation signal of leather sample again.
For achieving the above object, the technical solution used in the present invention is:
1) adopt leather shrinking temperature measuring instrument to obtain the original length that leather to be measured is a sample, then every 1-2 second the length that continuously to gather leather once to be measured in real time be sample and the test figure of constant speed intensification medium temperature, and by data line the sample original length that obtains, the length of the sample of gathering in real time and the test figure of medium temperature are kept in the database of computing machine;
2) if the sample length of the step 1) real-time collection of obtaining shrink original length after 10 smaller or equal to leather, then extract this experimental data and change step 3) over to;
If the sample length of the step 1) real-time collection of obtaining shrinks length after 10 greater than leather, then detect the humid test data of gathering leather sample length and medium temperature again;
3) if step 2) extract the experimental data of gathering the leather sample length and shrink length after 3/1000ths smaller or equal to leather sample, according to measurement standard these data are judged; Otherwise extract experimental data again;
4) if judge this data fit requirement, then in database, search pairing heating medium temperature value this moment, access then and show and be locked, with this shrinkage temperature as tested leather sample; Otherwise extract experimental data again.
The present invention's leather sample total length that record one secondary data is constituted every 1-2 second (as required even shorter time at interval) changes composite curve chart and the data set thereof that changes with relevant temperature, and be kept in real time in the supporting with it host computer database, and still use original displacement transducer to detect total length automatically and change at 10% o'clock as really the be heated reliable signal of post shrinkage deformation of leather sample, and then pairing temperature value when in database, searching leather sample and the being heated post shrinkage deformation 0.3% pairing temperature value of record data of deformation 0.3% standard difference minimum (perhaps with), and this moment temperature as the shrinkage temperature Ts relevant regulations in the coincidence measurement standard fully then.The present invention had both got rid of and had detected in on-the-spot various environmental factor and the signal processing circuit influence of inevitably disturbing, and had guaranteed to gather accurately and reliably the be heated signal of post shrinkage deformation of leather sample; The temperature of pairing heating medium when searching in the host computer database in the examination criteria that clearly the leather sample of regulation is heated post shrinkage deformation 0.3% again, with this as the shrinkage temperature Ts of this leather sample and show and lock.The present invention not only sets up in theory, and in practice by behind " a kind of leather shrinking temperature measuring instrument (ZL200510022767.5) " configuration host computer, the test findings proof that according to said method detects also is feasible.
Description of drawings
Fig. 1 a is the data set form of all data in the testing process of the present invention;
Fig. 1 b is the curve map of all data in the testing process of the present invention;
Fig. 2 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 2, measuring method of the present invention is as follows:
1) adopt leather shrinking temperature measuring instrument ZL200510022767.5 to obtain the original length that leather to be measured is a sample, then every 1-2 second the length that continuously to gather leather once to be measured in real time be sample and the test figure of constant speed intensification medium temperature, and by data line the sample original length that obtains, the length of the sample of gathering in real time and the test figure of medium temperature are kept in the database of computing machine;
2) if the sample length of the step 1) real-time collection of obtaining shrink original length after 10 smaller or equal to leather, then extract this experimental data and change step 3) over to;
If the sample length of the step 1) real-time collection of obtaining shrinks length after 10 greater than leather, then detect the humid test data of gathering leather sample length and medium temperature again;
3) if step 2) extract the experimental data of gathering the leather sample length and shrink length after 3/1000ths smaller or equal to leather sample, and according to 6.8 requirements in the measurement standard (QB/T 2713-2005) these data are judged; Otherwise extract experimental data again;
4) if judge this data fit requirement, then in the database shown in Fig. 1 a, b, search pairing heating medium temperature value this moment, access then and show and be locked, with this shrinkage temperature as tested leather sample; Otherwise extract experimental data again.
Because shrinking deformation signal, the leather sample gathers the restriction that is subjected to various disturbing factors accurately and reliably, so usually shown temperature all is pairing environment temperature but not the environment temperature of 0.3% correspondence stipulated in the examination criteria when shrinking deformation 10% left and right sides after the leather sample is heated, guaranteeing to shrink after the leather sample is heated the reliability of deformation signal, and instruct leather kneading process production technology in more being used for this detected parameters.If will go out the shrinkage temperature of certificate as quality testing department with these data, not meet relevant regulations testing conditions in the examination criteria strictly.
But, all real-time the sending in the database that host computer is a computing machine of all data of testing process (temperature and length along with time change etc.) stored by data line now according to method of the present invention.Pairing state really shrinks deformation signal to guarantee its accurate and reliability as the leather sample when shrinking deformation 10% after still being heated with the leather sample then.In a single day but when detecting this signal, be not with its for environment temperature shown as its shrinkage temperature and locked, but host computer will later be searched the environment temperature of correspondence (perhaps the most approaching) when shrinking the deformation Δ after the leather sample is heated and equaling total length 0.3% again according to program flow diagram shown in Figure 2 in database, and access with this shrinkage temperature Ts as this leather sample and to show and lock.Thereby satisfied the relevant regulations condition in the leather shrinking temperature examination criteria fully.
Certainly (about 1 hour) in the whole testing process all raw data are preserved or demonstration with the form of data set or curve, the thermal stability performance of leather sample is expanded to the whole overall process of being heated from point of shrinkage temperature, and then created condition for leather professional deeply carries out high-level research comprehensively.Certainly can also be as required the shrinkage temperature Ts of each leather sample and the data and curves in the whole testing process be printed in the examining report list with the form of form.
Claims (1)
1. leather shrinking temperature standard detecting method is characterized in that:
1) adopt leather shrinking temperature measuring instrument to obtain the original length that leather to be measured is a sample, then every 1-2 second the length that continuously to gather leather once to be measured in real time be sample and the test figure of constant speed intensification medium temperature, and by data line the sample original length that obtains, the length of the sample of gathering in real time and the test figure of medium temperature are kept in the database of computing machine;
2) if the sample length of the step 1) real-time collection of obtaining shrink original length after 10 smaller or equal to leather, then extract this experimental data and change step 3) over to;
If the sample length of the step 1) real-time collection of obtaining shrinks length after 10 greater than leather, then detect the humid test data of gathering leather sample length and medium temperature again;
3) if step 2) extract the experimental data of gathering the leather sample length and shrink length after 3/1000ths smaller or equal to leather sample, according to measurement standard these data are judged; Otherwise extract experimental data again;
4) if judge this data fit requirement, then in database, search pairing heating medium temperature value this moment, access then and show and be locked, with this shrinkage temperature as tested leather sample; Otherwise extract experimental data again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091496.4A CN102230905B (en) | 2011-04-12 | 2011-04-12 | Standard testing method of leather shrinking temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091496.4A CN102230905B (en) | 2011-04-12 | 2011-04-12 | Standard testing method of leather shrinking temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102230905A true CN102230905A (en) | 2011-11-02 |
| CN102230905B CN102230905B (en) | 2014-08-27 |
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| CN201110091496.4A Expired - Fee Related CN102230905B (en) | 2011-04-12 | 2011-04-12 | Standard testing method of leather shrinking temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118796A (en) * | 2019-06-14 | 2019-08-13 | 陕西科技大学 | A kind of contactless displacement extraction type shrinkage temperature measuring method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB714111A (en) * | 1952-04-29 | 1954-08-25 | Kurt Wachtel | Apparatus for determining the shrinkage temperature of leather, hides, skins and thelike |
| US2689474A (en) * | 1952-04-29 | 1954-09-21 | Wachtel Kurt | Apparatus for recording the shrinkage temperature of leather, hides, skins, and the like |
| CN1542438A (en) * | 2003-11-08 | 2004-11-03 | 陕西科技大学 | Precise determination analysis method and device for leather contraction temperature |
| CN1793875A (en) * | 2005-12-30 | 2006-06-28 | 陕西科技大学 | Leather shrinking temperature measuring instrument |
| CN2852118Y (en) * | 2005-12-30 | 2006-12-27 | 陕西科技大学 | Stereo leather shrinkage temperature measurer |
-
2011
- 2011-04-12 CN CN201110091496.4A patent/CN102230905B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB714111A (en) * | 1952-04-29 | 1954-08-25 | Kurt Wachtel | Apparatus for determining the shrinkage temperature of leather, hides, skins and thelike |
| US2689474A (en) * | 1952-04-29 | 1954-09-21 | Wachtel Kurt | Apparatus for recording the shrinkage temperature of leather, hides, skins, and the like |
| CN1542438A (en) * | 2003-11-08 | 2004-11-03 | 陕西科技大学 | Precise determination analysis method and device for leather contraction temperature |
| CN1793875A (en) * | 2005-12-30 | 2006-06-28 | 陕西科技大学 | Leather shrinking temperature measuring instrument |
| CN2852118Y (en) * | 2005-12-30 | 2006-12-27 | 陕西科技大学 | Stereo leather shrinkage temperature measurer |
Non-Patent Citations (3)
| Title |
|---|
| NEIL S.COHEN,ET AL: "Measurement of shrinkage behaviour in leather and parchment by dynamic mechanical thermal analysis", 《THERMOCHIMICA ACTA》, vol. 365, 31 December 2000 (2000-12-31), pages 111 - 117 * |
| 宁铎 等: "新一代非接触式皮革收缩温度检测仪的开发与研制", 《中国皮革》, vol. 36, no. 13, 31 July 2007 (2007-07-31), pages 32 - 35 * |
| 马令坤 等: "皮革收缩温度的检测与实现", 《中国皮革》, vol. 33, no. 21, 30 November 2004 (2004-11-30), pages 43 - 46 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118796A (en) * | 2019-06-14 | 2019-08-13 | 陕西科技大学 | A kind of contactless displacement extraction type shrinkage temperature measuring method and device |
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| Publication number | Publication date |
|---|---|
| CN102230905B (en) | 2014-08-27 |
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Granted publication date: 20140827 |