CN113740149A - Clamping device for film material tensile test and testing method thereof - Google Patents
Clamping device for film material tensile test and testing method thereof Download PDFInfo
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- CN113740149A CN113740149A CN202110987540.3A CN202110987540A CN113740149A CN 113740149 A CN113740149 A CN 113740149A CN 202110987540 A CN202110987540 A CN 202110987540A CN 113740149 A CN113740149 A CN 113740149A
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- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 238000009864 tensile test Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000010998 test method Methods 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 36
- 230000000694 effects Effects 0.000 description 9
- 230000000670 limiting effect Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000013522 software testing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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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
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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
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
A clamping device for tensile test of membrane and a test method thereof are disclosed, the device comprises: an upper clamp, a lower clamp, a first support rod and a second support rod. The upper fixture is internally provided with a first accommodating cavity and a first fixing part, the lower fixture is internally provided with a second accommodating cavity and a second fixing part, the first supporting rod is inserted into the first accommodating cavity of the upper fixture, and the second supporting rod is inserted into the second accommodating cavity of the lower fixture. The upper clamp clamps the first support rod through the first fixing piece, and the lower clamp clamps the second support rod through the second fixing piece; the first supporting rod and the second supporting rod are used for respectively winding and fixing two ends of a testing film material, so that the stability of the stretching process and the testing precision are improved.
Description
Technical Field
The application relates to the field of display, in particular to a tensile test clamping device for a display membrane and a test method thereof.
Background
In the general material development process, a mechanical tensile test is often required to characterize the mechanical properties of the material so as to determine whether the material monomer characteristics are in compliance. For example, for OLED and LCD display modules, most of the materials are polymer films or sheets, and have macro-morphology features such as high flatness and smooth surface. When the conventional tensile clamping device is used for testing, the material sample is easily loosened or slipped from the clamp under the influences of limited contact area, small friction force on a smooth surface and the like, so that the problems of poor test stability, low test precision, incapability of obtaining yield strength and breaking strength due to the fact that the material cannot be broken and the like are caused. The common stretching and clamping device has large correlation between the fixing effect and the material type and the surface smoothness degree, and the controllability of the operation process is low. Therefore, the problems that different materials have different stretching effects and testing accuracy, the testing stability is poor, the test materials cannot be broken and the like can occur, in addition, the fixing condition is improved by repeatedly assembling and disassembling the sample according to the stretching effect in the testing process, and when the conventional stretching clamping device is used for testing, the sample waste rate is high, and the working efficiency is low.
Therefore, it is urgently needed to improve the test stability and the precision of the lifting test of the conventional tensile clamping device, and further improve the working efficiency of the lifting test tensile test.
Disclosure of Invention
An object of the present application is to provide a clamping device for tensile testing of a film and a testing method thereof, which are used to solve the problems of the prior art, for example, the dependence of the fixing effect and the material type of the common clamping device on the surface smoothness is large, and the controllability of the operation process is low. Therefore, the problems of different tensile effects and test accuracies of different materials, poor test stability, failure in breaking of test materials and the like can occur.
In order to solve the above problem, the present application provides a film material tensile test clamping device, its characterized in that, film material tensile test clamping device includes: an upper clamp, a lower clamp, a first support rod and a second support rod. The upper fixture is internally provided with a first accommodating cavity and a first fixing part, the lower fixture is internally provided with a second accommodating cavity and a second fixing part, the first supporting rod is inserted into the first accommodating cavity of the upper fixture, and the second supporting rod is inserted into the second accommodating cavity of the lower fixture. The upper clamp clamps and fixes the first support rod through the first fixing piece, and the lower clamp clamps and fixes the second support rod through the second fixing piece; the first supporting rod and the second supporting rod are used for respectively winding and fixing two ends of a testing film material, so that the stability of the stretching process and the testing precision are improved.
In some embodiments, the first receiving cavity and the second receiving cavity are through holes respectively.
In some embodiments, the first and second fixing members are bolt fasteners, respectively.
In addition, in order to solve the above-mentioned problem, the present application provides a film material tensile test clamping device, which is characterized by comprising: an upper clamp, a lower clamp, a first support rod and a second support rod. The upper fixture is internally provided with a first fixing piece, the lower fixture is internally provided with a second fixing piece, the first supporting rod is fixed on the upper fixture, and the second supporting rod is fixed on the lower fixture. The upper clamp clamps and fixes the first support rod through the first fixing piece, and the lower clamp clamps and fixes the second support rod through the second fixing piece; the first supporting rod and the second supporting rod are used for respectively winding and fixing two ends of a testing film material, so that the stability of the stretching process and the testing precision are improved.
In some embodiments, a receiving cavity is formed in the upper clamp, the first support rod is inserted into the receiving cavity of the upper clamp, and the second support rod is disposed under the bottom of the lower clamp.
In some embodiments, a receiving cavity is formed in the lower clamp, the first support rod is disposed on the top of the upper clamp, and the second support rod is inserted into the receiving cavity of the lower clamp.
In some embodiments, the first support bar is disposed on a top of the upper clamp and the second support bar is disposed under a bottom of the lower clamp.
In some embodiments, the receiving cavity is a through hole.
In addition, in order to solve the above problems, the present application provides a testing method for a film material tensile testing clamping device, comprising the following steps:
providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp respectively comprise a through hole for accommodating,
providing two support rods which are respectively arranged in through holes of the upper clamp and the lower clamp, wherein the diameter of the through hole is matched with that of the support rod,
winding the two ends of the film material sample for several turns and respectively fixing on each support rod, and
two supporting rods are inserted into the through holes of the clamping device and are fastened through the first fixing piece and the second fixing piece respectively, and the sample to be tested is compressed and fixed between the clamps and the supporting rods, so that the stability of the stretching process and the testing precision are improved.
In some embodiments, the first fixing member and the second fixing member are a plurality of bolt fasteners, respectively.
The beneficial effect explanation about this application, this application device include two key structure spares, be the bar-shaped bracing piece that the anchor clamps that are used for the centre gripping to await measuring possess the through-hole characteristic or the through-hole anchor clamps or the load material plays limiting displacement respectively. For example, the through hole fixture includes an upper fixture and a lower fixture, and the upper fixture and the lower fixture respectively include an accommodating cavity for accommodating. The function of placing the rod-shaped support rod. The diameter of the through hole is matched with that of the rod-shaped support rod, so that good sealing combination can be realized between the clamp and the support rod in the fastening process. For the treatment of the test film material or the sample, the test film sample needs to be wound by a plurality of circles by using the adhesive and fixed on the rod-shaped supporting piece. The operation is required to be carried out on both ends of the test membrane material, and the test membrane material is in a dumbbell shape after being prepared. The treated test membrane material is wound on the supporting rod, the holding cavity of the clamp device is inserted for fastening treatment, and the test membrane material is compacted between the clamp and the supporting rod, so that the effect of double clamping is realized. After the clamp is fastened and closed, the size of the accommodating cavity is limited, the supporting rod is tightly wrapped, the vertical sliding of the test film in the clamp in the stretching process is further limited, and the stability and the test precision of the stretching process are improved. And utilize the bracing piece to test the membrane material loading, the operation is simple and convenient than traditional mode, and efficiency of software testing is higher.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic side view of a first embodiment of a clamping device for tensile testing of a film according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a first embodiment of a clamping device for tensile testing of a film according to an embodiment of the present application;
FIG. 3 is a schematic view of a first support bar and a first support bar in combination with a test membrane according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a first support bar and a first support bar in combination with a test membrane in an embodiment of the present application;
FIG. 5 is a schematic side view of a second embodiment of a clamping device for film tension testing in an embodiment of the present application;
fig. 6 is a schematic side view of a third embodiment of a clamping device for film material tensile test in the embodiment of the present application.
Fig. 7 is a schematic side view of a fourth embodiment of a clamping device for film material tensile test in the embodiment of the present application.
Fig. 8 is a flowchart illustrating a method for testing a film stretching test clamping device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Now, the technical solution of the present application is described with reference to specific embodiments, and as shown in fig. 1 to 4, the present application provides a film material tensile test clamping device, which is characterized in that the film material tensile test clamping device includes: an upper clamp 10, a lower clamp 20, a first support rod 30 and a second support rod 40. The upper fixture 10 is internally provided with a first accommodating cavity 11 and a first fixing part 12, the lower fixture 20 is internally provided with a second accommodating cavity 21 and a second fixing part 22, the first support rod 30 is inserted into the first accommodating cavity 11 of the upper fixture 10, and the second support rod 40 is inserted into the second accommodating cavity 21 of the lower fixture 20. Wherein, the upper clamp 10 clamps and fixes the first support rod 30 through the first fixing member 12, and the lower clamp 20 clamps and fixes the second support rod 40 through the second fixing member 22; the first support bar 30 and the second support bar 40 are used for respectively winding and fixing two ends of a testing film 50, so as to solve the problems that in the prior art, the fixing effect and the material type of a common stretching clamping device are highly related to the surface smoothness, and the controllability of the operation process is low. Therefore, different materials have different stretching effects and testing accuracy, the problems of poor testing stability, failure in breaking of the test materials and the like are solved, and the stability of the stretching process and the testing accuracy can be improved really. In other words, the present application provides a tensile fixture apparatus and a test method, including a fixture with a through hole feature for clamping a sample to be tested, a rod-shaped support rod with a load material for limiting, and other structures. The material is wound, adhered and fixed on a rod-shaped support rod, for example, and placed in a containing cavity of a through hole clamp, and after fastening, a tensile test is completed. The device or the method can solve the problem that the sample is easy to loosen and slide in two aspects, wherein the first aspect is to increase the contact area and increase the interface friction, and the second aspect is to increase the movement limit and prevent the sample from sliding. This application can effectively solved when conventional tensile fixture device tests smooth film material before, the material sample takes off easily from anchor clamps and slides, leads to experimental poor stability, the measuring accuracy is not high, the material fails to break and can't acquire yield strength and breaking strength scheduling problem.
In some embodiments, the first receiving cavity 11 and the second receiving cavity 21 are through holes respectively.
In some embodiments, the first fixing member 12 and the second fixing member 22 are bolt fasteners, respectively.
In addition, as shown in fig. 5 to 7, the present application provides a film material tensile test holding apparatus, which is characterized by comprising: an upper clamp 10, a lower clamp 20, a first support rod 30 and a second support rod 40. A first fixing member 12 is disposed in the upper fixture 10, a second fixing member 22 is disposed in the lower fixture 20, the first supporting rod 30 is fixed to the upper fixture 10, and the second supporting rod 40 is fixed to the lower fixture 20. Wherein, the upper clamp 10 clamps and fixes the first support rod 30 through the first fixing member 12, and the lower clamp 20 clamps and fixes the second support rod 40 through the second fixing member 22; the first support bar 30 and the second support bar 40 are used for respectively winding and fixing two ends of a testing film 50, so as to improve the stability of the stretching process and the testing precision.
As shown in fig. 7, in some embodiments, a receiving cavity 11 is formed in the upper fixture 10, the first support bar 30 is inserted into the receiving cavity 11 of the upper fixture 10, and the second support bar 40 is disposed under the bottom of the lower fixture 20.
As shown in fig. 6, in some embodiments, a receiving cavity 21 is formed in the lower clamp 20, the first support bar 30 is disposed on the top of the upper clamp 10, and the second support bar 40 is inserted into the receiving cavity 21 of the lower clamp 20.
As shown in fig. 5, in some embodiments, the first fixing member 12 and the second fixing member 22 are bolt fasteners. The first support bar 30 is disposed on the top of the upper jig 10, and the second support bar 40 is disposed under the bottom of the lower jig 20.
In some embodiments, the receiving cavities 11, 21 may be through holes.
In addition, as shown in the flowchart of fig. 8, the present application provides a method for testing a clamping device for a film material tensile test, which includes the following steps:
s10: providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp respectively comprise a through hole for accommodating,
s20: providing two support rods which are respectively arranged in through holes of the upper clamp and the lower clamp, wherein the diameter of the through hole is matched with that of the support rod,
s30: winding the two ends of the film material sample for several turns and respectively fixing on each support rod, and
s40: and inserting the two support rods into the through holes of the clamping device, fastening the two support rods through the first fixing piece and the second fixing piece respectively, and pressing and fixing the sample to be tested between the clamps and the support rods.
In some embodiments, the first fixing member and the second fixing member are a plurality of bolt fasteners, respectively.
In other words, the device mainly comprises two key structural components, namely a through hole clamp for clamping a sample to be tested and a rod-shaped support rod for limiting the position of a load material. The clamp comprises an upper clamp and a lower clamp, and the upper clamp and the lower clamp respectively comprise an accommodating cavity for accommodating. The function of the rod-shaped support rod is realized by the following three embodiments, wherein, the embodiment is shown in figure 1. The diameter of the accommodating cavity is matched with that of the rod-shaped support rod, so that good sealing combination can be realized between the clamp and the support rod in the fastening process. The supporting rod piece is a cylinder, and the material is rubber or polymer material with certain elasticity and plasticity, so that the stress condition of the surface of the material sample is adjusted through micro deformation in the fastening process, and the material is not damaged. The width of the support member should be greater than the width of the material sample, preferably 3-10 times the width of the material. For the treatment of the sample, the film material sample needs to be wound by a plurality of circles by using an adhesive tape or other fixing methods and is fixed on the rod-shaped support. Both ends of the material sample need to be subjected to the operation, the sample is in a dumbbell shape after being prepared, as shown in fig. 3, the processed sample is wound on the supporting rod and is inserted into the through hole of the clamp device for fastening, and the sample is compacted between the clamps and the supporting rod, so that the double-clamping effect is realized. After the clamp is fastened and closed, the size of the accommodating cavity is limited, the supporting rod is tightly wrapped, and the vertical sliding of the material in the clamp in the stretching process is further limited, so that the stability and the test precision of the stretching process are improved. And utilize the bracing piece to carry out the sample material loading, the operation is simple and convenient many than traditional mode, and efficiency of software testing is higher.
As shown in fig. 5, the second embodiment utilizes a scheme of using a rod-shaped support rod in combination with a square fixture, and reduces the slippage of the material sample by means of the limiting action of the rod-shaped support rod and the upper and lower end surfaces of the fixture, so as to solve the problems of sample stretching and sample slipping. As shown in fig. 6, in the third embodiment, a rod-shaped support rod is matched with an upper square clamp and a lower through hole clamp, and the slippage behavior of the material sample is reduced by means of the limiting action of the rod-shaped support rod and the upper end surface of the clamp and the method of increasing the friction force of the lower through hole clamp, so as to solve the problems of tensile sample stripping and slippage.
As shown in fig. 7, in the fourth embodiment, a rod-shaped support rod is used in combination with a lower square fixture and an upper through hole fixture, and the sliding behavior of the material sample is reduced by means of the limiting effect of the rod-shaped support rod and the lower end surface of the fixture and the method of increasing the friction force of the upper through hole fixture, so as to solve the problems of sample drawing, sample removal and sample sliding. The experiment verification is completed as the above embodiment, and the length deformation value of the test area before and after the experiment and the displacement value fed back by the sensor of the stretching device are compared to confirm that the length deformation value and the displacement value are consistent at the accuracy grade of 0.1mm, so that the material sample is proved to have no slippage in the stretching process. Under repeated tests, the material sample is smoothly broken in the stretching process, so that the test experimental data of the material such as the elastic modulus, the yield strength, the breaking strength and the like can be measured in time, and the stability and the test precision in the stretching process can be really and effectively improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above embodiments of the present application are described in detail, and specific examples are applied in the present application to explain the principles and implementations of the present application, and the description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. The utility model provides a membrane material tensile test clamping device which characterized in that, membrane material tensile test clamping device includes:
an upper clamp, a first containing cavity and a first fixing piece are arranged in the upper clamp,
a lower clamp, a second holding cavity and a second fixing piece are arranged in the lower clamp,
a first supporting rod inserted into the first accommodating cavity of the upper clamp,
the second supporting rod is inserted into the second accommodating cavity of the lower fixture, wherein the upper fixture clamps and fixes the first supporting rod through the first fixing piece, and the lower fixture clamps and fixes the second supporting rod through the second fixing piece; and
the first supporting rod and the second supporting rod are used for being respectively wound and fixed at two ends of a testing membrane material.
2. The film material tensile test clamping device of claim 1, wherein the first accommodating cavity and the second accommodating cavity are through holes respectively.
3. The film tensile test clamping device of claim 1, wherein the first fixing member and the second fixing member are respectively bolt fasteners.
4. The utility model provides a membrane material tensile test clamping device which characterized in that, membrane material tensile test clamping device includes:
an upper clamp, a first fixing part is arranged in the upper clamp,
a lower clamp, a second fixing part is arranged in the lower clamp,
a first support bar fixed to the upper jig,
a second supporting rod fixed on the lower clamp,
the upper clamp clamps and fixes the first support rod through the first fixing piece, and the lower clamp clamps and fixes the second support rod through the second fixing piece; and
the first supporting rod and the second supporting rod are used for being respectively wound and fixed at two ends of a testing membrane material.
5. The clamping device for film stretching test according to claim 4, wherein a receiving cavity is formed in the upper fixture, the first supporting rod is inserted into the receiving cavity of the upper fixture, and the second supporting rod is disposed under the bottom of the lower fixture.
6. The membrane material tensile test holding device according to claim 4, wherein a receiving cavity is formed in the lower fixture, the first support bar is disposed on the top of the upper fixture, and the second support bar is inserted into the receiving cavity of the lower fixture.
7. The film tensile test holding apparatus of claim 4, wherein the first support bar is disposed on top of the upper clamp and the second support bar is disposed under the bottom of the lower clamp.
8. The film tensile test holding device of claim 5 or 6, wherein the receiving cavity is a through hole.
9. A testing method of a clamping device for film stretching test is characterized by comprising the following steps:
providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp respectively comprise a through hole for accommodating,
providing two support rods which are respectively arranged in through holes of the upper clamp and the lower clamp, wherein the diameter of the through hole is matched with that of the support rod,
winding the two ends of the film material sample for several turns and fixing the film material sample on each supporting rod respectively, and
and inserting the two support rods into the through holes of the clamping device, fastening the two support rods through the first fixing piece and the second fixing piece respectively, and pressing and fixing the sample to be tested between the clamps and the support rods.
10. The method as claimed in claim 9, wherein the first and second fixing members are a plurality of bolt fasteners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110987540.3A CN113740149B (en) | 2021-08-26 | 2021-08-26 | Clamping device for film tensile test and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987540.3A CN113740149B (en) | 2021-08-26 | 2021-08-26 | Clamping device for film tensile test and testing method thereof |
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| CN113740149A true CN113740149A (en) | 2021-12-03 |
| CN113740149B CN113740149B (en) | 2023-11-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116448590A (en) * | 2023-06-08 | 2023-07-18 | 华北科技学院 | Clamp assembly, test device and test method for sheet high-temperature tensile test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114577610A (en) * | 2022-04-06 | 2022-06-03 | 安徽省通达新材料有限公司 | Device and method for detecting tensile strength performance of packaging film |
| CN114577610B (en) * | 2022-04-06 | 2022-08-16 | 安徽省通达新材料有限公司 | Device and method for detecting tensile strength performance of packaging film |
| CN116448590A (en) * | 2023-06-08 | 2023-07-18 | 华北科技学院 | Clamp assembly, test device and test method for sheet high-temperature tensile test |
| CN116448590B (en) * | 2023-06-08 | 2023-08-25 | 华北科技学院 | Clamp assembly, test device and test method for sheet high-temperature tensile test |
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