Hot melt adhesive shearing force test piece

Abstract

The utility model discloses a hot melt adhesive shearing force test piece which comprises a glass body and a steel sheet body, at least two bosses are arranged on the upper surface of the steel sheet body, a test adhesive layer is arranged between the bosses on the upper surface of the steel sheet body, one end of the glass body abuts against the bosses, and the other end of the glass body abuts against the test adhesive layer. And the testing adhesive layer is fixedly bonded with the glass body. The testing adhesive layers are arranged on the two bosses of the steel sheet body, the glass body is pressed on the hot melt adhesive until the lower surface of the glass body is in contact with the upper surfaces of the bosses, then the pressure maintaining block is placed to press the glass body to prevent the glass from moving, and after the testing adhesive layers are solidified, the pressure maintaining block is removed to obtain a test piece, namely the tension test can be carried out. The combination of the steel sheet body and the glass body is adopted, the interface combination of the backlight iron frame and the display glass is simulated, the height of the test adhesive layer is controlled by the height of the boss, and due to the protection of the gasket, the steel sheet is not easy to be damaged by clamping, and the glass is not easy to be broken by clamping.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a hot melt adhesive shear force testing piece. Background Art

[0002] For mobile phone display modules with camera blind holes, hot melt adhesive is applied to the blind hole opening of the backlight iron frame to bond the iron frame and display glass, which plays a role of bonding and shading. The shear force of hot melt adhesive on the iron frame and glass is an important indicator to measure its performance, which affects the firmness and reliability of the bonding. The current method of manufacturing shear force test pieces requires the use of specific fixtures to produce hot melt adhesive of a certain thickness to simulate actual products. There are problems such as difficult thickness control, easy glass breakage, and poor pressure retention.

[0003] For example, the Chinese utility model patent (CN114062257B) discloses a double-sided adhesive force testing device, which belongs to the field of adhesive force testing technology, and includes a scene simulation test part and a sampling and placing integrated part. The scene simulation test part is used to simulate the force conditions of the double-sided adhesive in different scenes and perform adhesive force testing. The sampling and placing integrated part is used to accurately intercept samples and place the samples. The scene simulation test part includes a test bench, and the test bench is connected to an arc track frame concave to the test bench. The sampling and placing integrated part includes a rotating shaft and a pick-and-place carrier. The pick-and-place carrier is connected to the test bench through a rotating shaft and corresponds to the second experimental board. The double-sided adhesive force testing device effectively avoids the contact between human hands and the test part of the double-sided adhesive and the occurrence of situations where the difficulty of peeling off the isolation film is increased due to the unstable placement of the double-sided adhesive, and accordingly improves the accuracy of the test results and the smoothness of the test process. Compared with the existing single test mode, it can comprehensively test the stickiness of the double-sided adhesive.

[0004] However, when the present inventor implemented the device, he found the following defects: the viscosity test piece of the test mechanism has a complex structure, which is not conducive to simulation. Utility Model Content

[0005] Based on this, it is necessary to provide a hot melt adhesive shear force test piece to address the above technical problems. A test adhesive layer is set on the two bosses of the steel sheet body, and the glass body is pressed on the hot melt adhesive until the lower surface of the glass body contacts the upper surface of the boss. Then a pressure holding block is placed to press the glass body to prevent the glass from moving. After the test adhesive layer is cured, the pressure holding block is removed to obtain the test piece, which can be used for tensile testing. The combination of the steel sheet body and the glass body is used to simulate the interface combination of the backlight iron frame and the display glass. The height of the boss controls the height of the test adhesive layer. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily broken.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A hot melt adhesive shear force test piece.

[0008] The hot melt adhesive shear force test piece specifically includes:

[0009] A glass body and a steel sheet body, wherein at least two bosses are arranged on the upper surface of the steel sheet body, a test glue layer is arranged between the bosses on the upper surface of the steel sheet body, one end of the glass body abuts against the bosses, and the test glue layer is fixedly bonded to the glass body.

[0010] As a preferred implementation of the hot melt adhesive shear force test piece provided by the utility model, the number of the bosses is two, the height of which is 0.05 mm to 0.2 mm, and the height of the test adhesive layer is consistent with that of the bosses.

[0011] As a preferred implementation of the hot melt adhesive shear force test piece provided by the utility model, the sizes of the steel sheet body and the glass body are both 60mm*20mm*2mm.

[0012] As a preferred implementation of the hot melt adhesive shear force testing piece provided by the utility model, all bosses are arranged on one end of the upper surface of the steel sheet body.

[0013] As a preferred embodiment of the hot melt adhesive shear force testing piece provided by the utility model, a first gasket is arranged on the bottom surface of the steel sheet body, and a second gasket is arranged on the top surface of the steel sheet body at one end away from the glass body.

[0014] As a preferred implementation of the hot melt adhesive shear force testing piece provided by the utility model, a third gasket is arranged on the top of the glass body, and a fourth gasket is arranged on the bottom surface of the glass body at one end away from the steel sheet body.

[0015] As a preferred implementation of the hot melt adhesive shear force testing piece provided by the utility model, the hot melt adhesive shear force testing piece further includes a pressure maintaining block, and the pressure maintaining block is placed on the upper surface of the glass body.

[0016] As a preferred implementation of the hot melt adhesive shear force test piece provided by the utility model, the vertical direction of the pressure maintaining block corresponds to the vertical direction of the test adhesive layer.

[0017] As a preferred implementation of the hot melt adhesive shear force test piece provided by the utility model, the pressure-maintaining block is made of any one of iron, copper or titanium alloy.

[0018] As a preferred embodiment of the hot melt adhesive shear force test piece provided by the utility model, the test adhesive layer is a hot melt adhesive of the type of ethylene-vinyl acetate copolymer, polyamide, polyurethane, polyester, polyethylene, polypropylene, etc.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a hot melt adhesive shear force test piece, in which a test adhesive layer is arranged on two bosses of a steel sheet body, and a glass body is pressed onto the hot melt adhesive until the lower surface of the glass body contacts the upper surface of the bosses, and then a pressure retaining block is placed to press the glass body to prevent the glass from moving. After the test adhesive layer is solidified, the pressure retaining block is removed to obtain a test piece, which can be used for a tensile test. A combination of a steel sheet body and a glass body is adopted to simulate the interface combination of a backlight iron frame and a display glass. The height of the bosses controls the height of the test adhesive layer. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily pinched and broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a hot melt adhesive shear force test piece provided by the utility model;

[0023] Figure 2 for Figure 1 Another angle view of;

[0024] Figure 3 for Figure 1 Another angle view of;

[0025] Figure 4 for Figure 1 Exploded diagram.

[0026] The markings in the figure are as follows:

[0027] Glass body 1; steel sheet body 2; boss 3; test adhesive layer 4; first gasket 5; second gasket 6; third gasket 7; fourth gasket 8; pressure-maintaining block 9. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] As described in the background art, the viscosity test piece of the test mechanism has a complex structure, which is not conducive to simulation.

[0030] In order to solve this technical problem, the utility model provides a hot melt adhesive shear force test piece.

[0031] Specifically, please refer to Figure 1-4 , the hot melt adhesive shear force test pieces specifically include:

[0032] A glass body 1 and a steel sheet body 2, wherein at least two bosses 3 are arranged on the upper surface of the steel sheet body 2, a test adhesive layer 4 is arranged between the bosses 3 on the upper surface of the steel sheet body 2, one end of the glass body 1 abuts against the boss 3, and the test adhesive layer 4 is fixedly bonded to the glass body 1.

[0033] The hot melt adhesive shear force test piece provided by the utility model is provided with a test adhesive layer 4 on two bosses 3 of a steel sheet body 2, and a glass body 1 is pressed onto the hot melt adhesive until the lower surface of the glass body 1 contacts the upper surface of the boss 3, and then a pressure retaining block 9 is placed to press the glass body 1 to prevent the glass from moving. After the test adhesive layer 4 is solidified, the pressure retaining block 9 is removed to obtain a test piece, which can be used for tensile testing. The combination of a steel sheet body 2 and a glass body 1 is adopted to simulate the interface combination of a backlight iron frame and a display glass. The height of the boss 3 controls the height of the test adhesive layer 4. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily pinched and broken.

[0034] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings. Example 1

[0037] Please refer to Figure 1-4A hot melt adhesive shear force test piece includes a glass body 1 and a steel sheet body 2. At least two bosses 3 are arranged on the upper surface of the steel sheet body 2. A test adhesive layer 4 is arranged between the bosses 3 on the upper surface of the steel sheet body 2. One end of the glass body 1 abuts against the boss 3, and the test adhesive layer 4 is fixedly bonded to the glass body 1.

[0038] Through the above structural design, the glass body 1 and the steel sheet body 2 simulate the interface combination of the backlight iron frame and the display glass; the test glue layer 4 is set on the two bosses 3 of the steel sheet body 2, and the glass body 1 is pressed on the hot melt adhesive until the lower surface of the glass body 1 contacts the upper surface of the boss 3, and then the pressure-maintaining block 9 is placed to press the glass body 1 to prevent the glass from moving. After the test glue layer 4 is cured for 72 hours, the pressure-maintaining block 9 is removed to obtain the test piece, which can be used for tensile testing. The surface of the glass body 1 is illuminated by the second element, and the hot melt adhesive bonding area s is measured. On the universal material testing machine, the tensile force F is measured, and the shear force P=F / S is calculated. The combination of the steel sheet body 2 and the glass body 1 simulates the interface combination of the backlight iron frame and the display glass. The height of the boss 3 controls the height of the test glue layer 4. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily broken.

[0039] Specifically, there are two bosses 3 , each of which has a height of 0.05 mm to 0.2 mm, and the height of the test adhesive layer 4 is consistent with that of the bosses 3 .

[0040] Through the above structural design, in this embodiment, the number of bosses 3 is two, and in different situations, it can also be three, depending on the situation. The height of the boss 3 controls the height of the test adhesive layer 4. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily broken.

[0041] Specifically, the sizes of the steel sheet body 2 and the glass body 1 are both 60 mm*20 mm*2 mm.

[0042] Through the above structural design, the sizes of the steel sheet body 2 and the glass body 1 are the same, in order to prevent the different tensile test data caused by different sizes and to prevent the specific value of the test glue layer 4 from being affected.

[0043] Specifically, all bosses 3 are arranged on one end of the upper surface of the steel sheet body 2 .

[0044] Through the above structural design, a test glue layer 4 is set on the two bosses 3 of the steel sheet body 2, and the glass body 1 is pressed on the hot melt adhesive until the lower surface of the glass body 1 contacts the upper surface of the boss 3, and then the pressure holding block 9 is placed to press the glass body 1 to prevent the glass from moving. After the test glue layer 4 is cured, the pressure holding block 9 is removed to obtain a test piece, which can be used for tensile testing. The combination of the steel sheet body 2 and the glass body 1 is used to simulate the interface combination of the backlight iron frame and the display glass. The height of the boss 3 controls the height of the test glue layer 4. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily broken. Example 2

[0045] The hot melt adhesive shear force test piece provided in Example 1 is further optimized, specifically, as follows Figure 1-4 As shown, a first gasket 5 is disposed on the bottom surface of the steel sheet body 2 , and a second gasket 6 is disposed on the top surface of the steel sheet body 2 at one end away from the glass body 1 .

[0046] Specifically, a third gasket 7 is disposed on the top of the glass body 1 , and a fourth gasket 8 is disposed on an end of the bottom surface of the glass body 1 away from the steel sheet body 2 .

[0047] Through the above structural design, due to the protection of the first gasket 5, the second gasket 6, the third gasket 7 and the fourth gasket 8, the steel sheet body 2 is not easily damaged by being clamped, and the glass body 1 is not easily broken by being clamped. Example 3

[0048] The hot melt adhesive shear force test piece provided in Example 1 or 2 is further optimized, such as Figure 1-4 As shown, the hot melt adhesive shear force testing piece also includes a pressure maintaining block 9 , which is placed on the upper surface of the glass body 1 .

[0049] Through the above structural design, the pressure-maintaining block 9 is used to press the test adhesive layer 4 between the glass body 1 and the steel sheet body 2 to prevent the glass body 1 from moving. After the hot melt adhesive is cured for 72 hours, the pressure-maintaining block 9 is removed to obtain the test piece.

[0050] Specifically, the vertical direction of the pressure-maintaining block 9 corresponds to the vertical direction of the test adhesive layer 4 .

[0051] Specifically, the pressure-maintaining block 9 is made of any one of iron, copper or titanium alloy.

[0052] Through the above structural design, in this embodiment, the material of the pressure-maintaining block 9 is iron, and under different requirements, it can also be copper or titanium alloy.

[0053] Specifically, the test adhesive layer 4 is a hot melt adhesive of the type of ethylene-vinyl acetate copolymer, polyamide, polyurethane, polyester, polyethylene, polypropylene, etc.

[0054] Through the above structural design, in this embodiment, the test adhesive layer 4 is ethylene-vinyl acetate copolymer, and under different requirements, it can also be any type of hot melt adhesive such as polyamide, polyurethane, polyester, polyethylene, polypropylene, etc.

[0055] The use process of the hot melt adhesive shear force test piece provided by the utility model is as follows:

[0056] A test adhesive layer 4 is set on the two bosses 3 of the steel sheet body 2, and the glass body 1 is pressed on the hot melt adhesive until the lower surface of the glass body 1 contacts the upper surface of the boss 3, and then a pressure-maintaining block 9 is placed to press the glass body 1 to prevent the glass from moving. After the test adhesive layer 4 is cured for 72 hours, the pressure-maintaining block 9 is removed to obtain a test piece, which can be used for tensile testing. The surface of the glass body 1 is illuminated by a second element, and the hot melt adhesive bonding area s is measured. The tensile force F is measured on a universal material testing machine, and the shear force P=F / S is calculated. The combination of the steel sheet body 2 and the glass body 1 is used to simulate the interface combination of the backlight iron frame and the display glass. The height of the boss 3 controls the height of the test adhesive layer 4. Due to the protection of the gasket, the steel sheet is not easily pinched and the glass is not easily pinched and broken.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A hot melt adhesive shear force test piece, characterized in that: It comprises a glass body (1) and a steel sheet body (2); at least two bosses (3) are arranged on the upper surface of the steel sheet body (2); a test adhesive layer (4) is arranged between the bosses (3) on the upper surface of the steel sheet body (2); one end of the glass body (1) abuts against the bosses (3); and the test adhesive layer (4) is fixedly bonded to the glass body (1).

2. The hot melt adhesive shear force test piece according to claim 1, characterized in that: The number of the bosses (3) is two, and the height of the bosses is 0.05 mm to 0.2 mm. The height of the test adhesive layer (4) is consistent with that of the bosses (3).

3. The hot melt adhesive shear force test piece according to claim 2, characterized in that: The dimensions of the steel sheet body (2) and the glass body (1) are both 60 mm*20 mm*2 mm.

4. The hot melt adhesive shear force test piece according to claim 3, characterized in that: All bosses (3) are arranged on one end of the upper surface of the steel sheet body (2).

5. The hot melt adhesive shear force test piece according to claim 1, characterized in that: A first gasket (5) is provided on the bottom surface of the steel sheet body (2), and a second gasket (6) is provided on the top surface of the steel sheet body (2) at one end away from the glass body (1).

6. The hot melt adhesive shear force test piece according to claim 5, characterized in that: A third gasket (7) is provided at the top of the glass body (1), and a fourth gasket (8) is provided at an end of the bottom surface of the glass body (1) away from the steel sheet body (2).

7. The hot melt adhesive shear force test piece according to claim 1, characterized in that: The hot melt adhesive shear force testing piece further comprises a pressure retaining block (9), wherein the pressure retaining block (9) is placed on the upper surface of the glass body (1).

8. The hot melt adhesive shear force test piece according to claim 7, characterized in that: The vertical direction of the pressure-maintaining block (9) corresponds to the vertical direction of the test adhesive layer (4).

9. The hot melt adhesive shear force test piece according to claim 7, characterized in that: The pressure-maintaining block (9) is made of any one of iron, copper or titanium alloy.

10. The hot melt adhesive shear force test piece according to claim 1, characterized in that: The test adhesive layer (4) is a hot melt adhesive of ethylene-vinyl acetate copolymer, polyamide, polyurethane, polyester, polyethylene or polypropylene type.

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