CN108106675B - Method for judging crosslinking degree of casing - Google Patents
Method for judging crosslinking degree of casing Download PDFInfo
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- CN108106675B CN108106675B CN201711481596.1A CN201711481596A CN108106675B CN 108106675 B CN108106675 B CN 108106675B CN 201711481596 A CN201711481596 A CN 201711481596A CN 108106675 B CN108106675 B CN 108106675B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention relates to a method for judging the crosslinking degree of a casing, and belongs to the technical field of casings. The invention comprises the following steps: (1) cutting the finished casing sleeve along the axial direction to form a casing slice; (2) tearing the sausage casing sheet from the middle to divide the sausage casing sheet into an inner layer and an outer layer; (3) respectively measuring the thickness and the thermal-acid breaking resistance of the inner layer and the outer layer of the sausage casing, wherein the thermal-acid breaking resistance takes the numerical value of unit thickness as a report result; (4) performing microscopic examination on the inner layer and the outer layer of the casing respectively, and comparing the difference of the diameters of the fibers of the inner layer and the outer layer; (5) and (4) judging according to the results obtained in the steps (3) and (4), and judging that the crosslinking of the casing is incomplete when the ratio of the thickness of the inner layer to the thickness of the outer layer of the casing, the difference of the thermal acid breaking resistance and the difference of the fiber diameter are large. The method is scientific and reasonable, is simple and convenient to operate, makes up the vacancy of the casing crosslinking degree detection method, predicts the actual application of the casing more accurately, and can provide guidance for the adjustment direction of the production process.
Description
Technical Field
The invention relates to a method for judging the crosslinking degree of a casing, and belongs to the technical field of casings.
background
at present, the detection of the collagen casing is excessively dependent on a rear-end application test, the detection of the casing finished product cannot achieve the purpose of predicting the application condition of the product, the applied detection is high in cost and low in efficiency, the application detection result is relatively single, and most problems in production influence the application test detection result.
The main source of the problem of casing application is that the casing is not completely crosslinked, and currently, the casing detection cannot accurately judge whether the casing crosslinking degree is completed. In ordinary tests, it is occasionally found that part of the sausage casing can be torn into an inner layer and an outer layer, and the sausage casing which can be torn from the middle has a relatively high proportion of various abnormalities in the application process. For analysis reasons, the crosslinking agent is dripped from the outer layer during the casing forming, the crosslinking agent is directly contacted with the outer layer of the casing wall, and the surface crosslinking agent is blown away in the next process, so that the possible phenomenon of different internal and external crosslinking conditions of the casing is inferred, and the judgment of the crosslinking degree of the casing can be respectively carried out from the internal and external crosslinking of the casing.
at present, no special research report on the detection results of the internal and external crosslinking of the sausage casing exists, the detection of the sausage casing starts from the whole sausage casing, and the difference of the internal and external crosslinking of the sausage casing is ignored.
Disclosure of Invention
The invention aims to provide a method for judging the crosslinking degree of a casing, which is scientific and reasonable, is simple and convenient to operate, makes up the vacancy of a casing crosslinking degree detection method, predicts the actual application of the casing more accurately, and can provide guidance for the adjustment direction of the production process.
The method for judging the crosslinking degree of the casing comprises the following steps of:
(1) Cutting the finished casing sleeve along the axial direction to form a casing slice;
(2) Tearing the sausage casing sheet from the middle to divide the sausage casing sheet into an inner layer and an outer layer;
(3) Respectively measuring the thickness and the thermal-acid breaking resistance of the inner layer and the outer layer of the sausage casing, wherein the thermal-acid breaking resistance takes the numerical value of unit thickness as a report result;
(4) Performing microscopic examination on the inner layer and the outer layer of the casing respectively, and comparing the difference of the diameters of the fibers of the inner layer and the outer layer;
(5) And (4) judging according to the results obtained in the steps (3) and (4), and judging that the crosslinking of the casing is incomplete when the ratio of the thickness of the inner layer to the thickness of the outer layer of the casing is large, the difference of the hot acid breaking resistance is large and the difference of the fiber diameter is large.
The length of the finished casing sleeve is 14-18 m.
the specific measurement method is as follows:
1. And (3) detecting the thickness ratio: the inside and outside thickness of the casing was measured using a micrometer screw (micrometer), the casing was cut into two layers and then cut into a narrow strip having a width of about 2mm, the thickness was measured using a micrometer screw, and the average of 5 parallel samples was taken as a result. The thickness ratio outer layer thickness/inner layer thickness 100%, the thickness ratio outside the range of 70% to 130% is considered to be a large difference in the thickness ratio.
2. And (3) detecting the thermal acid breaking resistance: cutting the inner and outer casing layers into 1.5cm wide and about 20cm long, cutting four pieces of each sample for later use, adjusting the temperature of a water bath to 70-80 ℃, putting about 50ml of 0.1mol/L hydrochloric acid into a beaker, putting the beaker into the water bath, heating, and starting the test when the temperature of the hydrochloric acid is stabilized at 70 +/-2 ℃. The length of the sample of the tensile machine is adjusted to be 100mm, the sausage casing is immersed in hydrochloric acid for 1 minute, the sausage casing is taken out and is dried by filter paper to absorb the surface hydrochloric acid, the tensile test is carried out, the test value is recorded, and the average value is calculated. The thermal acid breaking resistance ratio is 100% of the outer layer thermal acid breaking resistance/the inner layer thermal acid breaking resistance, and the difference between the thermal acid breaking resistance ratios outside the range of 80% to 120% is considered to be large.
3. and (3) detecting the fiber diameter ratio: the inner and outer casings are respectively subjected to microscopic examination under 10-time ocular lenses and 4-time objective lenses by using a microscope provided with an imaging system (Mingmei microscope imaging system), the thickness and the diameter of the inner and outer fiber layers are measured by using a ruler in the imaging system, and 5 parallel samples are selected as experimental results. The fiber diameter ratio is 100% outer layer diameter/inner layer diameter, and a diameter ratio outside the range of 80% to 120% is considered to be a large fiber diameter difference.
the detection shows that the thickness ratio of the inner layer to the outer layer of the casing, the hot acid breaking resistance of the inner layer and the outer layer and microscopic examination results have higher consistency, and the inner layer and the outer layer detection results with higher difference can judge that the inner layer and the outer layer of the casing are not completely crosslinked, so that the incomplete crosslinking of the casing is judged. When the results of the three parameters are inconsistent, the judging sequence is that the hot acid breaking resistance ratio is greater than the thickness ratio and the fiber diameter ratio is greater than the thickness ratio.
According to a great deal of experimental experience, the collagen which is easy to tear from the middle has higher ratio of the internal thickness to the external thickness, and the thermal acid breaking resistance of the internal layer and the external layer of the collagen is also greatly different, compared with a great deal of detection data, the thermal acid breaking resistance of the internal layer of the sausage casing with higher ratio of the thickness to the unit thickness is lower. Microscopic examination shows that the inner and outer layers of the sausage casing have obvious difference in fiber diameter, and the fiber diameter of the inner layer is higher than that of the outer layer, which can be explained by the high water absorption of collagen fiber caused by incomplete crosslinking of the inner layer.
Compared with the prior art, the invention has the following beneficial effects:
The invention respectively detects the crosslinking of the inner layer and the outer layer of the casing by comprehensively utilizing various detection means, is scientific and reasonable, is simple and convenient to operate, makes up the vacancy of the previous casing crosslinking degree detection method, predicts the actual application of the casing more accurately, and provides guidance for the adjustment direction of the production process.
Detailed Description
the present invention is further illustrated by the following examples, which are not intended to limit the practice of the invention.
examples 1 to 3
(1) Cutting off 14-18m of finished casing sleeve along the axial direction to form a casing slice;
(2) Tearing the sausage casing sheet from the middle to divide the sausage casing sheet into an inner layer and an outer layer;
(3) Respectively measuring the thickness and the thermal-acid breaking resistance of the inner layer and the outer layer of the sausage casing, wherein the thermal-acid breaking resistance takes the numerical value of unit thickness as a report result;
(4) Performing microscopic examination on the inner layer and the outer layer of the casing respectively, and comparing the difference of the diameters of the fibers of the inner layer and the outer layer;
(5) and (4) judging according to the results obtained in the steps (3) and (4), and judging that the crosslinking of the casing is incomplete when the ratio of the thickness of the inner layer to the thickness of the outer layer of the casing is large, the difference of the hot acid breaking resistance is large and the difference of the fiber diameter is large.
The specific measurement method is as follows:
detecting the thickness ratio: the inside and outside thickness of the casing was measured using a micrometer screw (micrometer), the casing was cut into two layers and then cut into narrow strips with a width of about 2mm, the thickness was measured using a micrometer screw, the thickness ratio was calculated, and the average of 5 parallel samples was taken as the result.
The thickness ratio outer layer thickness/inner layer thickness 100%.
Secondly, detecting the hot acid breaking resistance: cutting the inner and outer casing layers into 1.5cm wide and about 20cm long, cutting four pieces of each sample for later use, adjusting the temperature of a water bath to 70-80 ℃, putting about 50ml of 0.1mol/L hydrochloric acid into a beaker, putting the beaker into the water bath, heating, and starting the test when the temperature of the hydrochloric acid is stabilized at 70 +/-2 ℃. The length of the sample of the tensile machine is adjusted to 100mm, the sausage casing is immersed in hydrochloric acid for 1 minute, the sausage casing is taken out and the surface hydrochloric acid is sucked dry by filter paper, the tensile test is carried out, the test value is recorded, the hot acid breaking resistance ratio is calculated, and the average value of 5 parallel samples is taken as the result.
The hot acid breaking resistance ratio is 100% of the outer layer hot acid breaking resistance/the inner layer hot acid breaking resistance.
Detecting the fiber diameter ratio: the inner and outer casings are respectively subjected to microscopic examination under 10-time ocular lenses and 4-time objective lenses by using a microscope provided with an imaging system (Mingmei microscope imaging system), the thickness diameter of the inner and outer fiber layers is measured by using a ruler in the imaging system, the fiber diameter ratio is calculated, and 5 parallel samples are selected as experimental results.
fiber diameter ratio outer layer diameter/inner layer diameter 100%.
The results of the experiments obtained in examples 1 to 3 were collated and shown in tables 1 to 3.
Table 1 experimental results obtained in example 1
| Item | parallel sample 1 | parallel sample 2 | Parallel sample 3 | parallel sample 4 | Parallel sample 5 | mean value of |
| The thickness ratio% | 94 | 90 | 92 | 97 | 91 | 92.8 |
| Percentage of hot acid breaking resistance% | 112 | 109 | 117 | 115 | 121 | 114.8 |
| Fiber diameter ratio% | 88 | 85 | 82 | 89 | 84 | 85.6 |
table 2 experimental results obtained in example 2
| item | Parallel sample 1 | Parallel sample 2 | Parallel sample 3 | parallel sample 4 | Parallel sample 5 | Mean value of |
| The thickness ratio% | 67 | 70 | 65 | 63 | 69 | 66.8 |
| Percentage of hot acid breaking resistance% | 146 | 131 | 139 | 127 | 142 | 137 |
| Fiber diameter ratio% | 63 | 68 | 70 | 62 | 74 | 67.4 |
Table 3 experimental results obtained in example 3
| Item | Parallel sample 1 | Parallel sample 2 | Parallel sample 3 | Parallel sample 4 | Parallel sample 5 | Mean value of |
| The thickness ratio% | 74 | 80 | 71 | 79 | 82 | 77.2 |
| Percentage of hot acid breaking resistance% | 147 | 153 | 162 | 159 | 155 | 155.2 |
| Fiber diameter ratio% | 77 | 82 | 84 | 87 | 79 | 81.8 |
By comparison with the judgment standards, the data obtained in example 1 are all within the standard range, and therefore the casings used are well crosslinked; the data obtained in example 2 are not within the standard range, and the crosslinking degree of the used casings is not good; the data obtained in example 3 were in the standard range, and in the standard range, the enteric coating used was not well crosslinked, as indicated by the priority (hot acid resistance ratio > thickness ratio > fiber diameter ratio).
Claims (6)
1. A method for judging the crosslinking degree of a casing is characterized by comprising the following steps:
(1) Cutting the finished casing sleeve along the axial direction to form a casing slice;
(2) Tearing the sausage casing sheet from the middle to divide the sausage casing sheet into an inner layer and an outer layer;
(3) Respectively measuring the thickness and the thermal-acid breaking resistance of the inner layer and the outer layer of the sausage casing, wherein the thermal-acid breaking resistance takes the numerical value of unit thickness as a report result;
(4) Performing microscopic examination on the inner layer and the outer layer of the casing respectively, and comparing the difference of the diameters of the fibers of the inner layer and the outer layer;
(5) Judging according to the results obtained in the steps (3) and (4), and judging that the crosslinking of the casing is incomplete when the thickness difference of the inner layer and the outer layer of the casing is large, the thermal-acid breaking resistance difference is large and the fiber diameter difference is large;
Thickness ratio = outer layer thickness/inner layer thickness 100%, thickness ratio outside the range 70% -130% being considered as a large difference in thickness;
hot acid breaking resistance ratio = outer layer hot acid breaking resistance/inner layer hot acid breaking resistance 100%, the hot acid breaking resistance ratio outside the range of 80% -120% is regarded as a large difference in hot acid breaking resistance;
Fiber diameter ratio = outer layer diameter/inner layer diameter 100%, fiber diameter ratio outside the range of 80% -120% being considered as a large fiber diameter difference;
When the results of the three parameters are inconsistent, the judging sequence is that the hot acid breaking resistance ratio is greater than the thickness ratio and the fiber diameter ratio is greater than the thickness ratio.
2. The method of determining the degree of casing crosslinking of claim 1 wherein: the thickness of the inner and outer layers of the casing was measured using a micrometer screw.
3. the method of determining the degree of casing crosslinking of claim 1 wherein: when the thermal acid breaking resistance was measured, the concentration of hydrochloric acid used was 0.1 mol/L.
4. the method of determining the degree of casing crosslinking of claim 1 wherein: when measuring the thermal acid breaking resistance, the temperature of the hydrochloric acid is stabilized at 70 +/-2 ℃.
5. The method of determining the degree of casing crosslinking of claim 1 wherein: when measuring the hot acid breaking resistance, the sausage casing sample was immersed in hydrochloric acid for 1 minute.
6. The method of determining the degree of casing crosslinking of claim 1 wherein: and performing microscopic examination on the inner layer and the outer layer of the casing respectively under a 10-time ocular lens and a 4-time objective lens.
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| CN201711481596.1A CN108106675B (en) | 2017-12-29 | 2017-12-29 | Method for judging crosslinking degree of casing |
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| CN201711481596.1A CN108106675B (en) | 2017-12-29 | 2017-12-29 | Method for judging crosslinking degree of casing |
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| CN108106675B true CN108106675B (en) | 2019-12-13 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5043194A (en) * | 1988-08-05 | 1991-08-27 | Hoechst Aktiengesellschaft | Tubular packaging casing based on cellulose and having a textile-like texture |
| CN1578729A (en) * | 2001-10-31 | 2005-02-09 | 3M创新有限公司 | Cross-linked primer composition and use thereof in thermoformable films |
| WO2009041850A1 (en) * | 2007-09-27 | 2009-04-02 | Obschestvo S Ogranichennoi Otvetstvennostiyu 'nauchno-Proizvodstvennoe Predpriyatie 'slava' | Food product casing |
| CN101610902A (en) * | 2007-01-08 | 2009-12-23 | 宝洁公司 | Matrix with properties of mammalian skin |
| CN206378483U (en) * | 2016-12-27 | 2017-08-04 | 中国石油天然气股份有限公司 | Test gel type water shutoff agent becomes gel performance evaluation device |
| CN107101883A (en) * | 2017-03-29 | 2017-08-29 | 淄博黄河龙生物工程有限公司 | Collagent casing for sausages longitudinally resists the detection method of disconnected power |
-
2017
- 2017-12-29 CN CN201711481596.1A patent/CN108106675B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5043194A (en) * | 1988-08-05 | 1991-08-27 | Hoechst Aktiengesellschaft | Tubular packaging casing based on cellulose and having a textile-like texture |
| CN1578729A (en) * | 2001-10-31 | 2005-02-09 | 3M创新有限公司 | Cross-linked primer composition and use thereof in thermoformable films |
| CN101610902A (en) * | 2007-01-08 | 2009-12-23 | 宝洁公司 | Matrix with properties of mammalian skin |
| WO2009041850A1 (en) * | 2007-09-27 | 2009-04-02 | Obschestvo S Ogranichennoi Otvetstvennostiyu 'nauchno-Proizvodstvennoe Predpriyatie 'slava' | Food product casing |
| CN206378483U (en) * | 2016-12-27 | 2017-08-04 | 中国石油天然气股份有限公司 | Test gel type water shutoff agent becomes gel performance evaluation device |
| CN107101883A (en) * | 2017-03-29 | 2017-08-29 | 淄博黄河龙生物工程有限公司 | Collagent casing for sausages longitudinally resists the detection method of disconnected power |
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Address after: No. 201, Zhangbei Road, Guoli Town, Huantai County, Zibo City, Shandong Province Patentee after: Shandong haios Biotechnology Co.,Ltd. Address before: No. 201, Zhangbei Road, Guoli Town, Huantai County, Zibo City, Shandong Province Patentee before: SHANDONG HEALTH BIOTECHNOLOGY CO.,LTD. |
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