CN102230905B - Standard testing method of leather shrinking temperature - Google Patents
Standard testing method of leather shrinking temperature Download PDFInfo
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- CN102230905B CN102230905B CN201110091496.4A CN201110091496A CN102230905B CN 102230905 B CN102230905 B CN 102230905B CN 201110091496 A CN201110091496 A CN 201110091496A CN 102230905 B CN102230905 B CN 102230905B
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- 239000010985 leather Substances 0.000 title claims abstract description 73
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000000284 extract Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 230000008602 contraction Effects 0.000 description 3
- 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
- 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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- Treatment And Processing Of Natural Fur Or Leather (AREA)
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 meet standard testing method of leather shrinking temperature completely.
Technical background
Shrinkage temperature (Ts) is an important parameter that characterizes leather substance thermal stability, specifically refer to start to produce corresponding temperature while shrinking deformation after leather is heated in specific environment, examination criteria according to country about Ts: leather physics and mechanical test shrink inner " maximum length shrinks 0.3% " (i.e. 6.8 middle inspection record data or indicator and the formed curve of relevant temperature that clearly moment of shrinking deformation be specifically quantified as of warm mensuration (QB/T2713-2005), find out sample from the corresponding temperature of maximum length contraction 0.3%, record this temperature as shrinkage temperature).Along with leather industry is by the workshop-based transformation to large-scale industrial production, detect fast and accurately leather Ts, for instructing timely and effectively, leather processing production technology and deep professional Research Significance are great.But the current 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, or 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 Chengdu Hua Ming company and Sichuan University) in market and occupy domestic and international advanced level; All because can not accurately complete, change the detection of total length 0.3% and cannot be achieved: as for pointer analyzer, within 30 seconds, to gather the curve that a secondary data draws be very coarse relatively, and relevant temperature when search length changes 0.3% is actually and cannot realizes; And for the digital detecting instrument of robotization, shrink deformation (displacement) sensor in heating complex environment, detect accurately and reliably 0.15mm(be sample total length be 50mm 0.3%) displacement still have very large difficulty.So in order to provide its reliable skin sample to shrink deformation signal, generally all set total length contraction change 10% or when larger corresponding temperature as Ts; Otherwise heating medium in the measuring process reaching about a hour (water or glycerine) to the various interference that certainly exist in the inevitable environmental impact of leather sample (deformation > 0.3%) and circuit all the contraction deformation signal after being heated as skin sample of possible errors and after being judged by accident by computing machine as Ts and locked, it cannot normally be worked.
So find and a kind ofly can either obtain accurately and reliably the signal that leather sample really shrinks deformation, again can in strict accordance with in leather shrinking temperature examination criteria about detected leather sample, be subject to thermal deformation 0.3% time corresponding temperature just extremely important as its Ts.
Summary of the invention
The object of the present invention is to provide a kind of impact of inevitably disturbing of not only can getting rid of in the various environmental factors of Test Field and signal processing circuit, can guarantee again to gather be accurately and reliably the heated standard testing method of leather shrinking temperature of post shrinkage deformation signal of leather sample.
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 sample, then every 1-2 second continuously Real-time Collection once leather to be measured be the length of sample and the test figure of constant heating rates sintering medium temperature, and by data line, the length of sample of the sample original length obtaining, Real-time Collection and the test figure of medium temperature are kept in the database of computing machine;
2) if the leather that is less than or equal to of the sample length of the Real-time Collection that step 1) is obtained shrinks the original length after 10, extraction step 1) experimental data of the collection leather sample length of database proceeds to step 3);
If the sample length of the Real-time Collection that step 1) is obtained is greater than leather, shrink the length after 10, continue real-time detecting step 1) the leather sample length that gathers and humid test data the building database of medium temperature;
3) if step 2) experimental data of the collection leather sample length of the step 1) database that extracts is less than or equal to leather sample and shrinks the length after 3/1000ths, according to measurement standard, these data are judged; Otherwise again extract experimental data;
4) if judge this data fit requirement, in database, search now corresponding heating medium temperature value, then recall and show and be locked, using this shrinkage temperature as tested leather sample; Otherwise again extract experimental data.
The present invention's leather sample total length that record one secondary data forms every 1-2 second (as required even shorter time interval) changes composite curve chart and the data group thereof changing with relevant temperature, and be kept in real time with it in supporting host computer database, and while still using original displacement transducer automatically to detect total length to change 10% as be really the heated reliable signal of post shrinkage deformation of leather sample, and then corresponding temperature value when searching leather sample being heated post shrinkage deformation 0.3% in the database corresponding temperature value of record data of deformation 0.3% standard deviation minimum (or with), and using temperature now as the shrinkage temperature Ts relevant regulations in coincidence measurement standard completely.The present invention had both got rid of in the various environmental factors of Test Field and signal processing circuit the impact of inevitably disturbing, and had guaranteed to gather be accurately and reliably the heated signal of post shrinkage deformation of leather sample; Again by the clear and definite temperature of the leather sample of regulation corresponding heating medium while being heated post shrinkage deformation 0.3% search examination criteria in host computer database in, using this shrinkage temperature Ts as this leather sample show and lock.The present invention not only sets up in theory, and in practice by after " a kind of leather shrinking temperature measuring instrument (ZL200510022767.5) " configuration host computer, the experiment results proved according to said method detecting is also feasible.
Accompanying drawing explanation
Fig. 1 a is the data group form of all data in testing process of the present invention;
Fig. 1 b is the curve map of all data in testing process of the present invention;
Fig. 2 is 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 sample, then every 1-2 second continuously Real-time Collection once leather to be measured be the length of sample and the test figure of constant heating rates sintering medium temperature, and by data line, the length of sample of the sample original length obtaining, Real-time Collection and the test figure of medium temperature are kept in the database of computing machine;
2) if the leather that is less than or equal to of the sample length of the Real-time Collection that step 1) is obtained shrinks the original length after 10, extract this experimental data and proceed to step 3);
If the sample length of the Real-time Collection that step 1) is obtained is greater than leather, shrink the length after 10, again detect the humid test data that gather leather sample length and medium temperature;
3) if step 2) experimental data that extract to gather leather sample length is less than or equal to leather sample and shrinks the length after 3/1000ths, and according to 6.8 requirements in measurement standard (QB/T 2713-2005), these data are judged; Otherwise again extract experimental data;
4) if judge this data fit requirement, in the database as shown in Fig. 1 a, b, search now corresponding heating medium temperature value, then recall and show and be locked, using this shrinkage temperature as tested leather sample; Otherwise again extract experimental data.
Because shrinking deformation signal, leather sample gathers accurately and reliably the restriction that is subject to various disturbing factors, so conventionally shown temperature is all corresponding environment temperature but not the environment temperature of 0.3% correspondence stipulated in examination criteria while shrinking deformation 10% left and right after leather sample is heated, to guarantee to shrink after leather sample is heated the reliability of deformation signal, and instruct leather kneading process production technology in being more used for this detected parameters.If usining these data will go out the shrinkage temperature of certificate as quality testing department, do not meet strictly relevant regulations testing conditions in examination criteria.
But now according to method of the present invention, by data line all data of testing process (temperature and length along with time change etc.) all real-time sending in the database that host computer is computing machine store.Then the corresponding state while shrinking deformation 10% after leather sample is heated of still usining really shrinks deformation signal to guarantee it accurately and reliability as leather sample.But once this signal be detected, be not using its for environment temperature as its shrinkage temperature, shown and locked, but host computer will later be searched the environment temperature of corresponding (or the most approaching) when shrinking deformation Δ after leather sample is heated and equaling total length 0.3% again in database according to the program flow diagram shown in Fig. 2, and using this shrinkage temperature Ts as this leather sample and recall and show and lock.Thereby met the relevant regulations condition in leather shrinking temperature examination criteria completely.
Certainly (about 1 hour) in whole testing process all raw data are preserved or shown with the form of data group 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 with the form of form, the data and curves in the shrinkage temperature Ts of each leather sample and whole testing process be printed in examining report list.
Claims (1)
1. a standard testing method of leather shrinking temperature, is characterized in that:
1) adopt leather shrinking temperature measuring instrument to obtain the original length that leather to be measured is sample, then every 1-2 second continuously Real-time Collection once leather to be measured be the length of sample and the experimental data of constant heating rates sintering medium temperature, and by data line, the length of sample of the sample original length obtaining, Real-time Collection and the experimental data of medium temperature are kept in the database of computing machine;
2) if the sample length of the Real-time Collection that step 1) is obtained is less than or equal to leather original length, shrink the length after 10, extraction step 1) experimental data of the collection leather sample length of database proceeds to step 3);
If the sample length of the Real-time Collection that step 1) is obtained is greater than leather original length, shrink the length after 10, continue real-time detecting step 1) the leather sample length that gathers and temperature experiment data the building database of medium temperature;
3) if step 2) experimental data of the collection leather sample length of the step 1) database that extracts is less than or equal to leather sample and shrinks the length after 3/1000ths, according to measurement standard, these data are judged; Otherwise again from step 2) extract experimental data in the experimental data of collection leather sample length of the step 1) database that extracts;
4) if judge this data fit requirement, in database, search now corresponding heating medium temperature value, then recall and show and be locked, using this shrinkage temperature as tested leather sample; Otherwise again from step 2) extract experimental data in the experimental data of collection leather sample length of the step 1) database that extracts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091496.4A CN102230905B (en) | 2011-04-12 | 2011-04-12 | Standard testing method of leather shrinking temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110091496.4A CN102230905B (en) | 2011-04-12 | 2011-04-12 | Standard testing method of leather shrinking temperature |
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| CN102230905A CN102230905A (en) | 2011-11-02 |
| CN102230905B true 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 (6)
| Title |
|---|
| Measurement of shrinkage behaviour in leather and parchment by dynamic mechanical thermal analysis;Neil S.Cohen,et al;《Thermochimica Acta》;20001231;第365卷;第111-117页 * |
| Neil S.Cohen,et al.Measurement of shrinkage behaviour in leather and parchment by dynamic mechanical thermal analysis.《Thermochimica Acta》.2000,第365卷第111-117页. |
| 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》.2007,第36卷(第13期),第32-35页. |
| 新一代非接触式皮革收缩温度检测仪的开发与研制;宁铎 等;《中国皮革》;20070731;第36卷(第13期);第32-35页 * |
| 皮革收缩温度的检测与实现;马令坤 等;《中国皮革》;20041130;第33卷(第21期);第43-46页 * |
| 马令坤 等.皮革收缩温度的检测与实现.《中国皮革》.2004,第33卷(第21期),第43-46页. |
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