CN112014421A - High-temperature-resistant detection method for nylon heat insulation strip - Google Patents
High-temperature-resistant detection method for nylon heat insulation strip Download PDFInfo
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- 239000004677 Nylon Substances 0.000 title claims abstract description 50
- 229920001778 nylon Polymers 0.000 title claims abstract description 50
- 238000009413 insulation Methods 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000006872 improvement Effects 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a high-temperature-resistant detection method of a nylon heat insulation strip, which comprises the steps of preparing a sample, preparing four groups of drying ovens, starting heating to a first temperature from an initial temperature, heating to a second temperature from the first temperature, heating to a third temperature from the second temperature, respectively observing thermal deformation, heating to the first temperature from the initial temperature, heating to the second temperature from the initial temperature, heating to the third temperature from the initial temperature, respectively observing the thermal deformation, and carrying out a drawing test to obtain a first drawing thermal deformation, a second drawing thermal deformation and a third drawing thermal deformation; the method has the advantages that through designing different test environments and different sample lengths, different combinations of tests can obtain various thermal deformation parameters, the high temperature resistance of the nylon heat insulation strip can be comprehensively judged according to the various thermal deformation parameters obtained by the tests, the method has the advantage of high detection precision, any steps can be independently selected for detection according to actual requirements, and the flexibility of the detection steps is high.
Description
Technical Field
The invention relates to the technical field of heat insulation strip performance detection, in particular to a high temperature resistance detection method for a nylon heat insulation strip.
Background
With the continuous increase of environmental pollution and energy consumption in modern society, the requirements of people on energy conservation and emission reduction are gradually increased, and aluminum alloy doors and windows in the building industry also face the problem. The aluminum alloy door and window has the advantages of light weight, easy processing, good flame retardance, recyclability, beautiful appearance and the like, and is widely applied to the construction industry.
Nylon is one of engineering plastics which are most widely applied, has excellent performances such as high heat resistance, wear resistance, solvent resistance and the like, is small in heat conductivity coefficient due to the use of glass fiber reinforced nylon, can well play a role in blocking heat conduction, can be proved to be used as a heat insulation strip, and is widely applied to the heat insulation treatment process of door and window profiles at present.
The high temperature resistance detection is a detection method for checking the thermal deformation performance of the nylon thermal insulation strip, the thermal deformation performance of the nylon thermal insulation strip is likely to occur when the nylon thermal insulation strip is used in a high-temperature environment, so that the thermal deformation performance of the nylon thermal insulation strip needs to be detected to ensure the quality of a product in normal use, but the conventional detection method for the thermal deformation performance of the nylon thermal insulation strip is single in detection means, poor in test accuracy and difficult to be used as a criterion for checking the thermal deformation performance of the nylon thermal insulation strip. Therefore, the invention provides a high-temperature-resistant detection method for a nylon heat insulation strip, and aims to overcome the defects in the prior art.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a high-temperature-resistant detection method for a nylon heat insulation strip, which can obtain various thermal deformation parameters through different test environments and different sample lengths in different combinations of tests, comprehensively judge the high-temperature-resistant performance of the nylon heat insulation strip according to the various thermal deformation parameters obtained by the tests, and has the advantage of high detection precision.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme:
a high-temperature-resistant detection method for a nylon heat insulation strip comprises the following steps:
the method comprises the following steps: preparing a sample, taking a nylon heat insulation strip of the same production batch as a sample object, intercepting three sections of nylon heat insulation strips with the length of 10cm as a first short sample, a second short sample, a third short sample, a fourth short sample, a fifth short sample, a sixth short sample and a seventh short sample respectively, intercepting three sections of nylon heat insulation strips with the length of 20cm as a first middle sample, a second middle sample, a third middle sample, a fourth middle sample, a fifth middle sample, a sixth middle sample and a seventh middle sample respectively, and finally intercepting three sections of nylon heat insulation strips with the length of 30cm as a first long sample, a second long sample, a third long sample, a fourth long sample, a fifth long sample, a sixth long sample and a seventh long sample respectively;
step two: preparing four groups of drying ovens as heating devices, respectively marking the four drying ovens as a first drying oven, a second drying oven, a third drying oven and a fourth drying oven, respectively putting a first short sample, a first middle sample and a first long sample into the first drying oven, heating to a first temperature from an initial temperature, observing the heat deformation amount of the first short sample, the first middle sample and the first long sample in the temperature rising process, and marking as a first heat deformation amount;
step three: continuously raising the temperature to a second temperature on the basis of the first temperature, observing the thermal deformation amount of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording as a second thermal deformation amount;
step four: continuously raising the temperature to a third temperature on the basis of the second temperature, observing the thermal deformation amount of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording as a third thermal deformation amount;
step five: putting a second short sample, a second middle sample, a second long sample, a fifth short sample, a fifth middle sample and a fifth long sample into a second oven, heating the second oven to the first temperature from the initial temperature, observing the thermal deformation amount of the second short sample, the second middle sample and the second long sample, recording the thermal deformation amount as a first period thermal deformation amount, taking out the fifth short sample, the fifth middle sample and the fifth long sample, and performing a drawing test to obtain a first drawing thermal deformation amount;
step six: putting a third short sample, a third middle sample, a third long sample, a sixth short sample, a sixth middle sample and a sixth long sample into a third oven, heating the third oven to a second temperature from the initial temperature, observing the thermal deformation amount of the third short sample, the third middle sample and the third long sample, recording the thermal deformation amount as a second period thermal deformation amount, taking out the sixth short sample, the sixth middle sample and the sixth long sample, and performing a drawing test to obtain a second drawing thermal deformation amount;
step seven: and putting the fourth short sample, the fourth middle sample, the fourth long sample, the seventh short sample, the seventh middle sample and the seventh long sample into a fourth oven, heating the fourth oven to a third temperature from the initial temperature, observing the thermal deformation amount of the fourth short sample, the fourth middle sample and the fourth long sample, recording the thermal deformation amount as a third cycle thermal deformation amount, taking out the seventh short sample, the seventh middle sample and the seventh long sample, and performing a drawing test to obtain a third drawing thermal deformation amount.
The further improvement lies in that: before the nylon heat insulation strip is intercepted as a sample in the first step, the nylon heat insulation strip needs to be cleaned, the surface is free of dust, oil and alkaline substance residues and free of acid substance residues, when the sample is intercepted, the sample needs to be intercepted at intervals, and the interval length is 20-30 cm.
The further improvement lies in that: the air circulation in the first oven, the second oven, the third oven and the fourth oven should be kept to meet the thermal degradation rate, and the test environment in the ovens is not affected by accumulation of decomposition products or reduction of oxygen.
The further improvement lies in that: the drawing test in the step five comprises the following specific processes: and taking out the fifth short sample, the fifth middle sample and the fifth long sample, respectively fixing the fifth short sample, the fifth middle sample and the fifth long sample by using the same drawing equipment in the same test environment, and then respectively drawing the fifth short sample, the fifth middle sample and the fifth long sample by applying the same force to obtain a first drawing heat deformation amount.
The further improvement lies in that: and the fifth step further comprises the step of applying different forces to respectively perform drawing tests on the fifth short sample, the fifth middle sample and the fifth long sample according to the difference of the lengths of the fifth short sample, the fifth middle sample and the fifth long sample to obtain the first period drawing thermal deformation.
The further improvement lies in that: the drawing test in the sixth step comprises the following specific processes: and taking out the sixth short sample, the sixth middle sample and the sixth long sample, respectively fixing the sixth short sample, the sixth middle sample and the sixth long sample by using the same drawing equipment in the same test environment, and then respectively drawing the sixth short sample, the sixth middle sample and the sixth long sample by applying the same force to obtain a second drawing heat deformation amount.
The further improvement lies in that: and the sixth step further comprises the step of applying different forces to respectively perform drawing tests on the sixth short sample, the sixth middle sample and the sixth long sample according to the difference of the lengths of the sixth short sample, the sixth middle sample and the sixth long sample to obtain the drawing thermal deformation amount in the second period.
The further improvement lies in that: the drawing test in the step seven comprises the following specific processes: and taking out the seventh short sample, the seventh middle sample and the seventh long sample, respectively fixing the seventh short sample, the seventh middle sample and the seventh long sample by using the same drawing equipment in the same test environment, and then respectively drawing the seventh short sample, the seventh middle sample and the seventh long sample by applying the same force to obtain a second drawing heat deformation amount.
The further improvement lies in that: and the seventh step also comprises the step of applying different forces to respectively perform drawing tests on the seventh short sample, the seventh middle sample and the seventh long sample according to the difference of the lengths of the seventh short sample, the seventh middle sample and the seventh long sample to obtain a third cycle drawing thermal deformation amount.
The further improvement lies in that: the force applied in the drawing test process needs to be calculated by combining the heated temperature of the sample and the strength of the sample, and the applied force is guaranteed to be smaller than the breaking strength of the sample.
The invention has the beneficial effects that: the invention can obtain various thermal deformation parameters through designing different test environments and different sample lengths and tests with different combinations, comprehensively judge the high temperature resistance of the nylon heat-insulating strip according to the various thermal deformation parameters obtained by the tests, and has the advantage of high detection precision. The detection cost can be effectively reduced.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
The embodiment provides a high-temperature-resistant detection method for a nylon heat insulation strip, which comprises the following steps:
the method comprises the following steps: preparing a sample, taking a nylon heat insulation strip of the same production batch as a sample object, intercepting three sections of nylon heat insulation strips with the length of 10cm as a first short sample, a second short sample, a third short sample, a fourth short sample, a fifth short sample, a sixth short sample and a seventh short sample respectively, intercepting three sections of nylon heat insulation strips with the length of 20cm as a first middle sample, a second middle sample, a third middle sample, a fourth middle sample, a fifth middle sample, a sixth middle sample and a seventh middle sample respectively, and finally intercepting three sections of nylon heat insulation strips with the length of 30cm as a first long sample, a second long sample, a third long sample, a fourth long sample, a fifth long sample, a sixth long sample and a seventh long sample respectively, wherein before intercepting the nylon heat insulation strips as the samples, the nylon heat insulation strips need to be cleaned, so that the surfaces are free of dust, oil, alkaline substance residues and acid substance residues, when a sample is intercepted, the sample needs to be intercepted at intervals, and the interval length is 25 cm;
step two: four groups of ovens are prepared as heating equipment and respectively marked as a first oven, a second oven, a third oven and a fourth oven, air circulation in the first oven, the second oven, the third oven and the fourth oven is kept to meet the thermal degradation rate, the test environment in the ovens is guaranteed not to be influenced by accumulation of decomposition products or reduction of oxygen, then a first short sample, a first middle sample and a first long sample are respectively placed in the first oven, heating is carried out from the initial temperature to a first temperature, and the thermal deformation amount of the first short sample, the first middle sample and the first long sample in the temperature rising process is observed and marked as a first thermal deformation amount. (in this example, the initial temperature was 28 ℃ C., the first temperature was 75 ℃ C.);
step three: continuing to raise the temperature to a second temperature (in the embodiment, the second temperature is 150 ℃) on the basis of the first temperature, observing the thermal deformation amounts of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording the thermal deformation amounts as second thermal deformation amounts;
step four: continuing to raise the temperature to a third temperature on the basis of the second temperature (in the embodiment, the third temperature is 250 ℃), observing the thermal deformation amounts of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording the thermal deformation amounts as third thermal deformation amounts;
step five: putting a second short sample, a second middle sample, a second long sample, a fifth short sample, a fifth middle sample and a fifth long sample into a second oven, heating the second oven to the first temperature from the initial temperature, observing the thermal deformation of the second short sample, the second middle sample and the second long sample, recording the thermal deformation as a first period thermal deformation, taking out the fifth short sample, the fifth middle sample and the fifth long sample, and performing a drawing test to obtain a first drawing thermal deformation, wherein the drawing test specifically comprises the following steps: taking out the fifth short sample, the fifth middle sample and the fifth long sample, respectively fixing the fifth short sample, the fifth middle sample and the fifth long sample by using the same drawing equipment in the same test environment, then respectively drawing the fifth short sample, the fifth middle sample and the fifth long sample by applying the same force to obtain a first drawing heat deformation amount, and respectively drawing the fifth short sample, the fifth middle sample and the fifth long sample by applying different forces according to the difference of the lengths of the fifth short sample, the fifth middle sample and the fifth long sample to obtain a first period heat deformation drawing amount;
step six: putting a third short sample, a third middle sample, a third long sample, a sixth short sample, a sixth middle sample and a sixth long sample into a third oven, heating the third oven to a second temperature from an initial temperature, observing the thermal deformation amount of the third short sample, the third middle sample and the third long sample, recording the thermal deformation amount as a second period thermal deformation amount, taking out the sixth short sample, the sixth middle sample and the sixth long sample, and performing a drawing test to obtain a second drawing thermal deformation amount, wherein the drawing test specifically comprises the following steps: taking out the sixth short sample, the sixth middle sample and the sixth long sample, respectively fixing the sixth short sample, the sixth middle sample and the sixth long sample by using the same drawing equipment in the same test environment, then respectively drawing the sixth short sample, the sixth middle sample and the sixth long sample by applying the same force to obtain a second drawing thermal deformation amount, and respectively drawing the sixth short sample, the sixth middle sample and the sixth long sample by applying different forces according to the difference of the lengths of the sixth short sample, the sixth middle sample and the sixth long sample to obtain a second cycle drawing thermal deformation;
step seven: putting a fourth short sample, a fourth middle sample, a fourth long sample, a seventh short sample, a seventh middle sample and a seventh long sample into a fourth oven, heating the fourth oven to a third temperature (the third temperature is 250 ℃) from the initial temperature, observing the thermal deformation amount of the fourth short sample, the fourth middle sample and the fourth long sample, recording the thermal deformation amount as a third cycle thermal deformation amount, taking the seventh short sample, the seventh middle sample and the seventh long sample out, and performing a drawing test to obtain a third drawing thermal deformation amount, wherein the drawing test specifically comprises the following steps: after the seventh short sample, the seventh middle sample and the seventh long sample are taken out, the seventh short sample, the seventh middle sample and the seventh long sample are respectively fixed by the same drawing equipment in the same test environment, then the seventh short sample, the seventh middle sample and the seventh long sample are respectively drawn by applying the same force to obtain a second drawing thermal deformation amount, different forces are respectively applied to the seventh short sample, the seventh middle sample and the seventh long sample according to the difference of the lengths of the seventh short sample, the seventh middle sample and the seventh long sample to obtain a third cycle thermal deformation drawing amount, and the force applied in the drawing test process needs to be calculated by combining the heated temperature of the samples and the strength of the samples, so that the applied force is smaller than the breaking strength of the samples.
In this example, the prepared nylon heat insulating strip samples are shown in table 1, and after the high temperature resistance detection operation in this example is performed on the samples in table 1, the results shown in tables 2, 3 and 4 are obtained:
TABLE 1
TABLE 2
TABLE 3
TABLE 4
According to the results in tables 2, 3 and 4, the invention can obtain various thermal deformation parameters through designing different test environments and different sample lengths and tests in different combinations, can comprehensively judge the high temperature resistance of the nylon heat insulation strip, and is more comprehensive and accurate than the detection result by adopting a single means.
The invention can obtain various thermal deformation parameters through designing different test environments and different sample lengths and tests with different combinations, comprehensively judge the high temperature resistance of the nylon heat-insulating strip according to the various thermal deformation parameters obtained by the tests, and has the advantage of high detection precision. The detection cost can be effectively reduced.
The foregoing illustrates and describes the principles, essential features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A high temperature resistant detection method of a nylon heat insulation strip is characterized in that: the method comprises the following steps:
the method comprises the following steps: preparing a sample, taking a nylon heat insulation strip of the same production batch as a sample object, intercepting three sections of nylon heat insulation strips with the length of 10cm as a first short sample, a second short sample, a third short sample, a fourth short sample, a fifth short sample, a sixth short sample and a seventh short sample respectively, intercepting three sections of nylon heat insulation strips with the length of 20cm as a first middle sample, a second middle sample, a third middle sample, a fourth middle sample, a fifth middle sample, a sixth middle sample and a seventh middle sample respectively, and finally intercepting three sections of nylon heat insulation strips with the length of 30cm as a first long sample, a second long sample, a third long sample, a fourth long sample, a fifth long sample, a sixth long sample and a seventh long sample respectively;
step two: preparing four groups of drying ovens as heating devices, respectively marking the four drying ovens as a first drying oven, a second drying oven, a third drying oven and a fourth drying oven, respectively putting a first short sample, a first middle sample and a first long sample into the first drying oven, heating to a first temperature from an initial temperature, observing the heat deformation amount of the first short sample, the first middle sample and the first long sample in the temperature rising process, and marking as a first heat deformation amount;
step three: continuously raising the temperature to a second temperature on the basis of the first temperature, observing the thermal deformation amount of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording as a second thermal deformation amount;
step four: continuously raising the temperature to a third temperature on the basis of the second temperature, observing the thermal deformation amount of the first short sample, the first middle sample and the first long sample in the temperature raising process, and recording as a third thermal deformation amount;
step five: putting a second short sample, a second middle sample, a second long sample, a fifth short sample, a fifth middle sample and a fifth long sample into a second oven, heating the second oven to the first temperature from the initial temperature, observing the thermal deformation amount of the second short sample, the second middle sample and the second long sample, recording the thermal deformation amount as a first period thermal deformation amount, taking out the fifth short sample, the fifth middle sample and the fifth long sample, and performing a drawing test to obtain a first drawing thermal deformation amount;
step six: putting a third short sample, a third middle sample, a third long sample, a sixth short sample, a sixth middle sample and a sixth long sample into a third oven, heating the third oven to a second temperature from the initial temperature, observing the thermal deformation amount of the third short sample, the third middle sample and the third long sample, recording the thermal deformation amount as a second period thermal deformation amount, taking out the sixth short sample, the sixth middle sample and the sixth long sample, and performing a drawing test to obtain a second drawing thermal deformation amount;
step seven: and putting the fourth short sample, the fourth middle sample, the fourth long sample, the seventh short sample, the seventh middle sample and the seventh long sample into a fourth oven, heating the fourth oven to a third temperature from the initial temperature, observing the thermal deformation amount of the fourth short sample, the fourth middle sample and the fourth long sample, recording the thermal deformation amount as a third cycle thermal deformation amount, taking out the seventh short sample, the seventh middle sample and the seventh long sample, and performing a drawing test to obtain a third drawing thermal deformation amount.
2. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: before the nylon heat insulation strip is intercepted as a sample in the first step, the nylon heat insulation strip needs to be cleaned, the surface is free of dust, oil and alkaline substance residues and free of acid substance residues, when the sample is intercepted, the sample needs to be intercepted at intervals, and the interval length is 20-30 cm.
3. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: the air circulation in the first oven, the second oven, the third oven and the fourth oven should be kept to meet the thermal degradation rate, and the test environment in the ovens is not affected by accumulation of decomposition products or reduction of oxygen.
4. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: the drawing test in the step five comprises the following specific processes: and taking out the fifth short sample, the fifth middle sample and the fifth long sample, respectively fixing the fifth short sample, the fifth middle sample and the fifth long sample by using the same drawing equipment in the same test environment, and then respectively drawing the fifth short sample, the fifth middle sample and the fifth long sample by applying the same force to obtain a first drawing heat deformation amount.
5. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 4, characterized in that: and the fifth step further comprises the step of applying different forces to respectively perform drawing tests on the fifth short sample, the fifth middle sample and the fifth long sample according to the difference of the lengths of the fifth short sample, the fifth middle sample and the fifth long sample to obtain the first period drawing thermal deformation.
6. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: the drawing test in the sixth step comprises the following specific processes: and taking out the sixth short sample, the sixth middle sample and the sixth long sample, respectively fixing the sixth short sample, the sixth middle sample and the sixth long sample by using the same drawing equipment in the same test environment, and then respectively drawing the sixth short sample, the sixth middle sample and the sixth long sample by applying the same force to obtain a second drawing heat deformation amount.
7. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 6, characterized in that: and the sixth step further comprises the step of applying different forces to respectively perform drawing tests on the sixth short sample, the sixth middle sample and the sixth long sample according to the difference of the lengths of the sixth short sample, the sixth middle sample and the sixth long sample to obtain the drawing thermal deformation amount in the second period.
8. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: the drawing test in the step seven comprises the following specific processes: and taking out the seventh short sample, the seventh middle sample and the seventh long sample, respectively fixing the seventh short sample, the seventh middle sample and the seventh long sample by using the same drawing equipment in the same test environment, and then respectively drawing the seventh short sample, the seventh middle sample and the seventh long sample by applying the same force to obtain a second drawing heat deformation amount.
9. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 8, characterized in that: and the seventh step also comprises the step of applying different forces to respectively perform drawing tests on the seventh short sample, the seventh middle sample and the seventh long sample according to the difference of the lengths of the seventh short sample, the seventh middle sample and the seventh long sample to obtain a third cycle drawing thermal deformation amount.
10. The high-temperature-resistant detection method of the nylon heat insulation strip according to claim 1, characterized in that: the force applied in the drawing test process needs to be calculated by combining the heated temperature of the sample and the strength of the sample, and the applied force is guaranteed to be smaller than the breaking strength of the sample.
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| Publication number | Priority date | Publication date | Assignee | Title |
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