CN114062253A - Method for testing interface bonding force of hot melt adhesive and silicone adhesive - Google Patents
Method for testing interface bonding force of hot melt adhesive and silicone adhesive Download PDFInfo
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- CN114062253A CN114062253A CN202111301753.2A CN202111301753A CN114062253A CN 114062253 A CN114062253 A CN 114062253A CN 202111301753 A CN202111301753 A CN 202111301753A CN 114062253 A CN114062253 A CN 114062253A
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- 238000012360 testing method Methods 0.000 title claims abstract description 182
- 239000013464 silicone adhesive Substances 0.000 title claims abstract description 56
- 239000004831 Hot glue Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 43
- 239000000853 adhesive Substances 0.000 claims description 30
- 230000001070 adhesive effect Effects 0.000 claims description 30
- 238000002360 preparation method Methods 0.000 claims description 24
- 230000002457 bidirectional effect Effects 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000000084 colloidal system Substances 0.000 claims 1
- 229920000297 Rayon Polymers 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000758 substrate Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 230000002337 anti-port Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013522 software testing Methods 0.000 description 1
- 238000010998 test method Methods 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
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- 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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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application relates to the field of bonding strength tests, and particularly discloses a method for testing the bonding force of a hot melt adhesive and a silicone adhesive interface, which comprises the following steps: placing a hot melt adhesive sample sheet on a test piece, coating silicone adhesive on the hot melt adhesive sample sheet, placing another test piece on the silicone adhesive, extruding the two test pieces to enable the thickness of the silicone adhesive to be 2mm, heating the hot melt adhesive sample sheet and continuously extruding the two test pieces to enable the thickness of the hot melt adhesive sample sheet to be 2mm, waiting for the hot melt adhesive to be solidified, maintaining, and stretching the two test pieces to test the shearing strength between the hot melt adhesive and the silicone adhesive; this application has the advantage that conveniently detects the bonding strength between two kinds of viscose.
Description
Technical Field
The application relates to the field of bonding strength test, in particular to a method for testing the interface bonding force of hot melt adhesive and silicone adhesive.
Background
Shear strength testing is commonly used to test the adhesive ability of an adhesive to a substrate by bonding the same substrate with the adhesive and then stretching the substrate using a tensile tester to test the bond strength between the adhesive and the substrate.
However, as the technology of adhesives and other industrial technologies develop, two or more adhesives are generally used for bonding, i.e. one adhesive is coated on a substrate, then another adhesive is coated on the adhesive, and finally another substrate is bonded, so that the bonding strength of the adhesive for bonding the substrates in the above manner is not affected by the substrate, but by the other adhesive. Therefore, the adhesive strength of the adhesive is different from that of the traditional adhesive, and the adhesive strength between the two adhesives needs to be tested to make a relatively objective evaluation.
Therefore, the conventional sample preparation test method is not applicable, and a new method for testing the bonding strength between two adhesives is required.
Disclosure of Invention
In order to conveniently test the bonding strength between two adhesives, the application provides a method for testing the interface bonding force of the hot melt adhesive and the silicone adhesive.
The method for testing the interface bonding force of the hot melt adhesive and the silicone adhesive adopts the following technical scheme:
a method for testing interface bonding force of hot melt adhesive and silicone adhesive comprises the following steps:
s1, processing the hot melt adhesive by using a flat vulcanizing machine to obtain a film with the thickness of 2.5 mm;
s2, cleaning the surface of the film and cutting the film into sample pieces, placing the sample pieces on one test piece, coating silicone adhesive on the sample pieces, placing the other test piece on the silicone adhesive, extruding the two test pieces to enable the thickness of the silicone adhesive to be 2 +/-0.2 mm, and waiting for the silicone adhesive to be cured to obtain test pieces;
s3, after the silicone adhesive is solidified, heating the test piece and continuously extruding the two test pieces to ensure that the thickness of the sample piece is 2 +/-0.2 mm, and cutting off the excessive adhesive overflowing the test piece by a cutter;
s4, curing the test piece processed in the step S3 at the temperature of 23 +/-2 ℃ and the relative humidity of 50 +/-5%;
s5, after curing, stretching the two test pieces to obtain the bonding strength between the hot melt adhesive and the silicone adhesive;
the selected hot melt adhesive, silicone adhesive and test piece meet the following conditions: the bonding strength of the hot melt adhesive and the test piece and the bonding strength of the silicone adhesive and the test piece are both greater than the bonding strength between the hot melt adhesive and the silicone adhesive.
Through adopting above-mentioned technical scheme, fix a position and the area that bonds through hot melt adhesive film sample piece earlier, then scribble the silicone adhesive and bond hot melt adhesive film and test specimen, bond hot melt adhesive film and another test specimen through heating and extruded mode at last, and because the bonding strength between test specimen and hot melt adhesive and the silicone adhesive is greater than the bonding strength between hot melt adhesive and the silicone adhesive, consequently can obtain the bonding strength between two kinds of viscose through the shear strength between two test specimens of test.
Preferably, the test strip comprises a test strip body, wherein a bonding portion and a matching portion are arranged on the test strip body, the bonding portion is used for coating the glue to be tested, and the matching portion is used for connecting with a test device used in cooperation with the test strip.
By adopting the technical scheme, the bonding part of the test piece is used for coating the adhesive, and the matching part is used for being connected with the test equipment, so that the tested test piece is easier to clean and can be reused.
Preferably, the test equipment comprises a conveying device, a heating device and a sample preparation device, wherein the heating device and the sample preparation device are both connected with the conveying device, and the conveying device is used for conveying the sample preparation device to the heating device;
the sample preparation device comprises a base, a pressing seat arranged above the base and a driving piece used for driving the pressing seat to move close to or far away from the base, guide rods are fixedly connected to four corners of the base and perpendicular to the base, the pressing seat is connected with the guide rods in a sliding mode, an installation seat is arranged on one side, away from the base, of the pressing seat, the installation seat is fixedly connected with the guide rods, the driving piece is installed on the installation seat, and the driving piece is connected with the pressing seat;
the base comprises an installation part for installing the test specimen and a positioning part for positioning the height of the pressing seat, and the thickness of the positioning part is greater than that of the installation part;
the mounting part is provided with a clamping piece for locking the test piece, and the pressing seat is provided with a locking piece for locking another test piece;
a lifting groove is formed in the top wall of the positioning portion along the height direction of the positioning portion, the lifting groove is communicated with the side wall of the positioning portion, which is close to one side of the mounting portion, a positioning plate is slidably mounted in the lifting groove, limiting plates are fixedly connected to two ends of the positioning plate, limiting grooves are formed in the side walls of two sides of the lifting groove along the height direction of the positioning portion, and the limiting plates are in sliding fit with the limiting grooves; one end of the positioning part, which is far away from the installation part, is provided with a positioning part for fixing the position of the positioning plate.
Through adopting above-mentioned technical scheme, a test specimen passes through the joint spare to be fixed at the installation department, and another test specimen passes through the locking piece locking on pressing the seat, presses the seat and receives the test specimen of the drive top of driving piece to push down, and when two test specimens be close to the back, the height that the locating plate was adjusted to the rethread setting element makes the adhesive tape thickness between two test specimens certain, reaches the standard, and the preparation of test specimen at every turn is all simple swift, improves efficiency of software testing.
Preferably, the mounting groove has been seted up on the roof of installation department, test specimen and mounting groove joint cooperation, flexible groove has been seted up on the lateral wall of mounting groove, joint spare includes joint spring and joint piece, joint spring one end links to each other with the tank bottom in flexible groove, the other end of joint spring links to each other with the joint piece, joint piece and flexible groove sliding fit, the joint piece supports tightly with test specimen's lateral wall.
Through adopting above-mentioned technical scheme, when the installation department was installed to the test strip, correspond test strip and mounting groove earlier, then press the test strip and get into the mounting groove in, the joint piece is impressed flexible inslot to under the effort of joint spring, the joint piece supports the test strip tightly in the mounting groove.
Preferably, a moving groove is formed in the side wall of one side, close to the base, of the pressing seat, the locking piece comprises a bidirectional screw rod, a rotating handle and a clamping block, the bidirectional screw rod is arranged in the moving groove along the length direction of the moving groove, the two ends of the bidirectional screw rod are respectively connected with the side walls at the two ends of the moving groove in a rotating mode, the rotating handle is connected to the side wall of one side of the pressing seat in a rotating mode, the rotating handle penetrates through the side wall of the pressing seat and is fixedly connected with the bidirectional screw rod, the two ends of the moving groove are respectively connected with the clamping block in a sliding mode, the clamping block is in threaded fit with the bidirectional screw rod, friction grains are formed in the side walls, opposite to the two clamping blocks, a butting block is fixedly connected to the center of the bottom of the moving groove, the thickness of the butting block is smaller than the depth of the moving groove, the bidirectional screw rod penetrates through the butting block and is connected with the butting block in a rotating mode, and the other testing test piece is connected with the moving groove in a clamping mode, the clamping block is abutted against the side wall of the test piece, and the abutting block is abutted against the test piece.
Through adopting above-mentioned technical scheme, when pressing the test block installation on the seat, rotate earlier and rotate the handle, rotate the handle and drive two-way screw rod and rotate, two-way screw rod rotates and drives two grip blocks and keep away from each other, form the clearance that is used for installing the test block between two grip blocks, then install the test block in the clearance that forms, the handle is rotated in the antiport again, two-way screw rod drives two grip blocks and is close to each other during the antiport to with the test block centre gripping to pressing on the seat. The pressing seat is convenient and fast to install the test piece, and the efficiency is high.
Preferably, the positioning element comprises two screw sets respectively arranged at two sides of the positioning part, each screw set comprises two screws respectively arranged at the upper and lower sides of the limiting plate, the positioning part is provided with driving handles corresponding to the screws one by one, the driving handles penetrate through the side wall of the positioning part and are fixedly connected with the screws, the driving handles are rotatably connected with the positioning part, a sliding groove matched with the screws for use is arranged in the positioning part along the length direction of the limiting plate, the length of the sliding groove is greater than that of the limiting plate, one end of the screw, far away from the end connected with the driving handles, is rotatably connected with the side wall of the sliding groove, a sliding block is slidably arranged in the sliding groove and is in threaded connection with the screws, one side of the sliding block, close to the limiting plate, is connected with the positioning ball, and abutting grooves in sliding fit with the positioning ball are arranged at the upper and lower sides of the limiting plate, an accommodating groove matched with the positioning ball for use is formed in the side wall of one end of the sliding groove in the length direction; when the locating ball above the limiting plate is abutted to the abutting groove, the limiting plate is abutted to the lower side wall of the limiting groove, and when the locating ball below the limiting plate is abutted to the abutting groove, the limiting plate is abutted to the upper side wall of the limiting groove.
Through adopting above-mentioned technical scheme, when fixing a position the locating plate, rotate the drive handle that is located the locating plate below, drive handle drives the screw rod and rotates, and screw rod drive sliding block slides, and drive location ball and butt groove butt when the sliding block slides to promote the locating plate and upwards support tightly, make the locating plate be in the highest point. When adjusting the locating plate height, the first reverse rotation is located the drive handle of locating plate below for the sliding block drives location ball and butt groove separation, and gets into in the holding tank. Then rotate the drive handle that is located the locating plate top again, drive handle drives the screw rod and rotates, and screw rod drive sliding block slides, and drive location ball and butt groove butt when the sliding block slides to promote the locating plate and support tightly downwards, make the locating plate be in the lower. The height of the positioning plate can be adjusted, so that when the test piece on the pressing seat is matched and bonded with the test piece on the base, the thickness of the viscose between the two test pieces can be adjusted more easily, and the positioning plate is more accurate and convenient.
Preferably, transmission device includes frame, first driving roller, second driving roller and drive belt, first driving roller and second driving roller rotate respectively and connect in the both ends of frame, install the drive belt on first driving roller and the second driving roller, install the motor on the lateral wall of frame, the output shaft of motor passes the fixed linking to each other of axis of rotation of frame and first driving roller, the system appearance device is located on the drive belt, heating device locates the one end of frame.
Through adopting above-mentioned technical scheme, transmission device utilizes the drive belt to carry the system appearance device and heats in advancing heating device, and the system appearance device after the heating also can shift out heating device through the drive belt to make the heating of viscose convenient and fast more in the system appearance device.
Preferably, the heating device comprises a heating box body, the heating box body is connected with the rack, an inlet is formed in one side of the heating box body, a sealing cover used for sealing the inlet is arranged on the heating box body, and a heating piece and a humidifier are arranged in the heating box body.
Through adopting above-mentioned technical scheme, heat the system appearance device through the heating plate in the heating cabinet, adjust humidity through the humidifier to make the viscose in the system appearance device can control and soften bonding or maintenance in stable environment, reduce environmental factor's interference.
In summary, the present application has the following beneficial effects:
1. the shear strength test piece is prepared by adopting the test piece and the test equipment, and the preparation efficiency of the test sample is improved by conveniently installing the test piece and conveniently controlling the distance between the test pieces;
2. the method adopts the mode of firstly curing one viscose glue for bonding, more conveniently controls the bonding thickness and the bonding area of the two viscose glues, reduces the error rate and improves the accuracy of measurement.
Drawings
FIG. 1 is a perspective view of a test strip in an example of the present application;
FIG. 2 is a perspective view of a test apparatus in an embodiment of the present application;
FIG. 3 is a perspective view of a sample preparation device in an embodiment of the present application;
FIG. 4 is a perspective view of a base and mount in an embodiment of the present application;
FIG. 5 is a cross-sectional view of the base of the embodiment of the present application, showing the structure of the clip on the mounting portion;
fig. 6 is a perspective view of the positioning plate, the limiting plate and the positioning member in the embodiment of the present application;
FIG. 7 is a cross-sectional view of the base in the embodiment of the present application, which is used for illustrating the connection relationship among the positioning plate, the limiting plate, the positioning member and the base;
fig. 8 is a perspective view of the pressing base and the locking member in the embodiment of the present application.
Reference numerals: 1. testing the test piece; 11. an adhesive portion; 12. a fitting portion; 13. a first test strip; 21. a frame; 22. a first drive roller; 23. a second driving roller; 24. a transmission belt; 25. a motor; 31. heating the box body; 32. an inlet port; 33. a closure cap; 34. a heating plate; 4. a sample preparation device; 41. a base; 411. an installation part; 4111. mounting grooves; 412. a positioning part; 4121. a lifting groove; 413. positioning a plate; 414. a limiting plate; 415. a positioning member; 4151. a screw; 4152. a drive handle; 4153. a slider; 4154. a positioning ball; 4155. a butt joint groove; 416. a sliding groove; 417. accommodating grooves; 42. a pressing seat; 421. a moving groove; 4221. a bidirectional screw; 4222. rotating the handle; 4223. a clamping block; 4224. rubbing the lines; 4225. a butting block; 43. a drive member; 44. a guide bar; 45. a guide hole; 46. a mounting seat; 5. a clamping piece; 51. clamping a spring; 52. a clamping block; 53. a telescopic groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-8 and examples.
Particularly, the hot melt adhesive adopts a butyl hot melt adhesive for JS-300SG reaction type hollow glass of Hangzhou Jiang chemical industry Co., Ltd; the silicone adhesive is JS-2000 silicone adhesive of Hangzhou Jiang chemical industry Co.
Examples
Example 1
A test strip comprises a test strip body, wherein the test strip body is composed of a bonding portion 11 and a matching portion 12, the bonding portion 11 is used for coating glue to be tested, and the matching portion 12 is used for being connected with a test device used in cooperation with a test strip 1.
A test apparatus comprises a transport device, a heating device and a sample preparation device 4. The transport device is used for transporting the sample preparation device 4 into or out of the heating device. The two test strips 1 are bonded by the sample preparation device 4, and the two test strips 1 are respectively a first test strip 13 and a second test strip 1.
Specifically, the conveying means includes a frame 21, a first driving roller 22, a second driving roller 23, and a belt 24. The first driving roller 22 is rotatably connected to one end of the frame 21, and the second driving roller 23 is rotatably connected to the other end of the frame 21. A motor 25 is fixedly mounted on the side wall of the frame 21, and an output shaft of the motor 25 passes through the side wall of the frame 21 and is connected with a rotating shaft of the first driving roller 22 through a coupling. The first driving roller 22 and the second driving roller 23 are provided with a driving belt 24. When the motor 25 drives the first driving roller 22 to rotate, the first driving roller 22 drives the driving belt 24 to rotate, and the second driving roller 23 is driven to rotate by the driving belt 24.
The sample preparation device 4 is provided on the belt 24. The sample preparing device 4 includes a base 41 for mounting the first test strip 13, a pressing base 42 for mounting the second test strip 1, and a driving member 43 for driving the pressing base 42 to move closer to or away from the base 41.
The base 41 is stepped, and specifically, the base 41 is composed of a mounting portion 411 with a small thickness and a positioning portion 412 with a large thickness. The mounting portion 411 is used for mounting the first test strip 13, and the positioning portion 412 is used for positioning the position of the second test strip 1 when the pressing base 42 presses the second test strip 1.
Mounting portion 411 has seted up mounting groove 4111 on the roof that is close to location portion 412 one side, and first test strip 13 cooperates with mounting groove 4111 joint. The mounting portion 411 is further provided with a clamping member 5 for locking the first test strip 13, and the clamping member 5 includes a clamping spring 51 and a clamping block 52. Seted up flexible groove 53 on the lateral wall of mounting groove 4111, joint spring 51 sets up in flexible groove 53, and joint spring 51 one end links to each other with the tank bottom of flexible groove 53 is fixed, joint piece 52 fixed connection in joint spring 51's the other end, and joint piece 52 and flexible groove 53 sliding fit. When the first test piece 13 is clamped with the mounting groove 4111, the clamping block 52 abuts against the sidewall of the first test piece 13.
The top wall of the positioning portion 412 near the mounting portion 411 is opened with a lifting groove 4121, and the lifting groove 4121 is communicated with the side wall of the positioning portion 412 near the mounting portion 411. The side walls of the two sides of the lifting groove 4121 are provided with limit grooves along the thickness direction of the positioning part 412. A positioning plate 413 is slidably mounted in the lifting groove 4121 along the thickness direction of the positioning portion 412, the side walls on the two sides of the positioning plate 413 are fixedly connected with limiting plates 414, and the limiting plates 414 are in sliding fit with the limiting grooves. The positioning part 412 is further provided with a positioning member 415 for positioning the position of the stopper plate 414.
The two side walls of the limiting groove in the thickness direction of the positioning portion 412 are provided with sliding grooves 416, and the length of the sliding grooves 416 is larger than that of the limiting groove. The side wall of the sliding groove 416 near the mounting portion 411 is provided with a receiving groove 417, and the receiving groove 417 is communicated with the sliding groove 416.
The positioning element 415 includes two screw rods 4151 respectively disposed at two sides of the positioning portion 412, each screw rod 4151 includes two screw rods 4151 respectively disposed at two upper and lower sides of the position-limiting plate 414, and the screw rods 4151 are disposed in the sliding groove 416. One end of the screw 4151 is rotatably connected to the side wall of one end of the slide groove 416, and the other end of the screw 4151 is rotatably connected to the side wall of the other end of the slide groove 416. A driving handle 4152 corresponding to the screw 4151 is rotatably connected to a side wall of the positioning portion 412 away from the mounting portion 411, and the driving handle 4152 penetrates through the side wall of the positioning portion 412 and is fixedly connected with the screw 4151. The screw 4151 can be driven to rotate by rotating the drive handle 4152.
The positioning member 415 further includes a sliding block 4153 slidably mounted in the sliding groove 416, the sliding block 4153 is provided with a threaded hole, and the screw 4151 is in threaded engagement with the threaded hole. When the screw 4151 rotates, the slide block 4153 slides in the slide groove 416 by being stopped by the slide groove 416.
The positioning member 415 further includes a positioning ball 4154 fixedly coupled to a side wall of the slide block 4153 on a side close to the position restricting plate 414. The side walls of the upper and lower sides of the position-limiting plate 414 are provided with abutting grooves 4155 along the length direction of the position-limiting plate 414, and the positioning balls 4154 can abut against the abutting grooves 4155. When the positioning ball 4154 above the position-limiting plate 414 abuts against the abutting groove 4155 on the upper sidewall of the position-limiting plate 414, the positioning ball 4154 below the position-limiting plate 414 is located in the receiving groove 417, the position-limiting plate 414 abuts against the lower sidewall of the position-limiting groove, the positioning plate 413 abuts against the lower sidewall of the elevating groove 4121, and the height of the positioning plate 413 is the lowest. When the positioning ball 4154 below the position-limiting plate 414 abuts against the abutting groove 4155 on the lower sidewall of the position-limiting plate 414, the positioning ball 4154 above the position-limiting plate 414 is located in the receiving groove 417, the position-limiting plate 414 abuts against the upper sidewall of the position-limiting groove, the positioning plate 413 abuts against the upper sidewall of the lifting groove 4121, and at this time, the height of the positioning plate 413 is the highest.
The top wall of perpendicular base 41 is fixedly connected with guide bar 44 on four angles of base 41, offers on four angles of pressing the seat 42 with guide hole 45 that guide bar 44 cooperation was used, guide bar 44 and guide hole 45 one-to-one sliding fit. One side of the pressing base 42, which faces away from the base 41, is provided with a mounting base 46, the mounting base 46 is fixedly connected with four guide rods 44, the driving member 43 is arranged on the mounting base 46, and the driving member 43 is an air cylinder in this embodiment. The piston rod of the cylinder is fixedly connected with the side wall of the pressing seat 42, which is far away from the base 41, through installation. The pressing seat 42 is driven by a piston rod of the air cylinder to move up and down to approach or separate from the base 41.
A locking member for locking the second test piece is disposed on a side wall of the pressing base 42 close to the base 41.
The side wall of the pressing seat 42 close to the base 41 is provided with a moving groove 421, the locking member includes a bidirectional screw 4221 arranged in the moving groove 421 along the length direction of the moving groove 421, one end of the bidirectional screw 4221 is rotatably connected with the side wall of one end of the moving groove 421, and the other end of the bidirectional screw 4221 is rotatably connected with the side wall of the other end of the moving groove 421. The locking piece further comprises a rotating handle 4222 rotatably connected to one side wall of the pressing base 42, and the rotating handle 4222 penetrates through the side wall of the pressing base 42 and is fixedly connected with the two-way screw 4221. Two ends of the bidirectional screw rod 4221 are respectively in threaded connection with a clamping block 4223, the clamping blocks 4223 are in sliding fit with the moving groove 421, and the opposite side walls of the two clamping blocks 4223 are provided with friction threads 4224. By rotating the rotation handle 4222, the rotation handle 4222 drives the bidirectional screw 4221 to rotate, and the bidirectional screw 4221 rotates to drive the clamping blocks 4223 at the two ends of the bidirectional screw 4221 to approach each other.
An abutting block 4225 is fixedly connected to the center of the bottom of the movable groove 421, and a bidirectional screw 4221 penetrates through the abutting block 4225 and is connected with the abutting block 4225 in a rotating mode. The second test strip 1 is arranged between the two clamping blocks 4223 and clamped by the two clamping blocks 4223, the side wall of the second test strip 1 is abutted against the abutting block 4225, and the sum of the thickness of the second test strip 1 and the thickness of the abutting block 4225 is greater than the depth of the moving groove 421.
The heating device is arranged at one end of the frame 21 close to the second driving roller 23. The heating device comprises a heating box body 31 fixedly connected with the frame 21, an introducing port 32 used for introducing the sample preparation device 4 is arranged on the side wall of one side, facing the sample preparation device 4, of the heating box body 31, and a sealing cover 33 used for sealing the introducing port 32 is hinged to the side wall of the heating box body 31. A plurality of heating sheets 34 and a humidifier are fixedly connected to the inner side wall of the heating box 31.
A method for testing interface bonding force of hot melt adhesive and silicone adhesive comprises the following steps:
the first test piece 13 and the second test piece 1 are both glass test pieces.
S1, heating the hot melt adhesive in a drying oven at 150 ℃ for 15 minutes, and pressing the preheated hot melt adhesive into a film with the thickness of 2.5mm in a flat vulcanizing machine;
and S2, cleaning the first test piece 13 and the second test piece 1 with ethyl acetate and cotton yarn, mounting the first test piece 13 on the base 41 of the sample preparation device 4, and mounting the second test piece 1 on the pressing base 42. Cutting the film into a sample sheet with the specification of 25mm multiplied by 25mm, placing the sample sheet on the first test specimen 13, coating silicone adhesive on the sample sheet, starting an air cylinder of the sample preparation device 4, pressing the second test specimen 1 on the silicone adhesive, wherein the positioning plate 413 in the sample preparation device 4 is at the highest position, and the surface of the positioning plate 413 is 4.5mm away from the surface of the first test specimen 13;
s3, after the silicone adhesive is cured, the sample preparation device 4 is conveyed into a heating device through a conveying device, the heating device is heated for 15min at 80 ℃, then the position of the positioning plate 413 is adjusted to the lowest position, the distance between the surface of the positioning plate 413 and the surface of the first test piece 13 is 4mm, then the air cylinder is started to push the pressing seat 42 to enable the second test piece 1 to be attached to the positioning plate 413, the thickness of the sample piece is 2mm, and a cutter is used for cutting off redundant adhesive;
s4, curing the test piece processed in the step S3 for 8 hours at the temperature of 25 ℃ and the relative humidity of 50%;
and S5, after the curing is finished, the two test pieces 1 are stretched by a tensile testing machine at a separation speed of 50mm/min to test the bonding strength between the hot melt adhesive and the silicone adhesive.
Comparative example
Comparative example 1
A method for testing interface bonding force of hot melt adhesive and silicone adhesive comprises the following steps:
the first test piece and the second test piece are both glass test pieces.
S1: the surface of the first test piece is coated with silicone adhesive with the area of 15mm multiplied by 25mm, the thickness during coating is 2.5mm, then the hot melt adhesive film with the area of 15mm multiplied by 25mm and the thickness of 2mm is placed on the surface of the silicone adhesive, then the second test piece is placed on the surface of the hot melt adhesive film, then the first test piece and the second test piece are compressed by 30N pressure, and the silicone adhesive is waited to be cured.
S2: and after the silicone adhesive is cured, heating the hot melt adhesive film to 80 ℃, heating for 15min, continuously pressing the first test piece and the second test piece with the pressure of 30N, and cutting off redundant adhesive by using a cutter.
S3, curing the test piece processed in the step S2 for 8 hours at the temperature of 25 ℃ and the relative humidity of 50%;
and S4, after the curing is finished, the two test pieces are stretched by a tensile testing machine at a separation speed of 50mm/min to test the bonding strength between the hot melt adhesive and the silicone adhesive.
Comparative example 2
Comparative example 2 differs from example 1 in that the thickness of the silicone adhesive after curing was controlled to be 1mm and the thickness of the hot melt adhesive after curing was controlled to be 2 mm.
Comparative example 3
Comparative example 3 is different from example 1 in that the thickness of the silicone adhesive after curing is controlled to be 2mm and the thickness of the hot melt adhesive after curing is controlled to be 1 mm.
Test results
And observing the surface of the sample after the test of the tensile testing machine, repeating the test for 5 times, and taking the average value of the test results.
TABLE 1
It can be seen from the combination of example 1 and comparative example 1 and table 1 that, when the bonding samples of the first test strip and the second test strip obtained by sample preparation by using the testing device in the present application are tested, the test result is more accurate and has small error, and the test result of comparative example 1 can clearly show that the bonding strength between the prepared first test strip and the prepared second test strip can be maintained within a certain range, but has larger accidental error every time, so that the mode adopted in the present application is more accurate.
It can be seen from the combination of example 1, comparative example 2 and comparative example 3 and table 1 that if the thickness of the silicone adhesive or the hot melt adhesive is too small, the thinner adhesive is easily separated from the test piece during the adhesion strength test, so that it is not possible to determine whether the measured adhesion strength is the adhesion strength between the test piece and the adhesive or the adhesion strength between the adhesive and the adhesive.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A method for testing the interface bonding force of hot melt adhesive and silicone adhesive is characterized by comprising the following steps:
s1, processing the hot melt adhesive by using a flat vulcanizing machine to obtain a film with the thickness of 2.5 mm;
s2, cleaning the surface of the film and cutting the film into sample pieces, placing the sample pieces on one test piece (1), coating silicone adhesive on the sample pieces, placing the other test piece (1) on the silicone adhesive, extruding the two test pieces (1) to enable the thickness of the silicone adhesive to be 2 +/-0.2 mm, and waiting for the silicone adhesive to be cured to obtain test pieces;
s3, after the silicone adhesive is solidified, heating the test piece and continuously extruding the two test pieces (1) to ensure that the thickness of the hot melt adhesive sample piece is 2 +/-0.2 mm, and cutting off the excessive colloid overflowing the test piece by a cutter;
s4, curing the test piece (1) processed in the step S3 at the temperature of 23 +/-2 ℃ and the relative humidity of 50 +/-5%;
s5, after curing, stretching the two test pieces (1) to obtain the bonding strength between the hot melt adhesive and the silicone adhesive;
the selected hot melt adhesive, silicone adhesive and test piece (1) meet the following conditions: the bonding strength of the hot melt adhesive and the test piece (1) and the bonding strength of the silicone adhesive and the test piece (1) are both greater than the bonding strength between the hot melt adhesive and the silicone adhesive.
2. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 1, wherein the test strip (1) comprises a strip body, the strip body is provided with an adhesive portion (11) and a matching portion (12), the adhesive portion (11) is used for coating the adhesive to be tested, and the matching portion (12) is used for connecting with a testing device used in cooperation with the test strip (1).
3. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 2, wherein the testing equipment comprises a conveying device, a heating device and a sample preparation device (4), wherein the heating device and the sample preparation device (4) are both connected with the conveying device, and the conveying device is used for conveying the sample preparation device (4) to the heating device;
the sample preparation device (4) comprises a base (41), a pressing seat (42) arranged above the base (41) and a driving piece (43) used for driving the pressing seat (42) to move close to or far away from the base (41), guide rods (44) are fixedly connected to four corners of the base (41) and perpendicular to the base (41), the pressing seat (42) is connected with the guide rods (44) in a sliding mode, a mounting seat (46) is arranged on one side, away from the base (41), of the pressing seat (42), the mounting seat (46) is fixedly connected with the guide rods (44), the driving piece (43) is mounted on the mounting seat (46), and the driving piece (43) is connected with the pressing seat (42);
the base (41) comprises a mounting part (411) for mounting the test specimen (1) and a positioning part (412) for positioning the height of the pressing seat (42), and the thickness of the positioning part (412) is greater than that of the mounting part (411);
the mounting part (411) is provided with a clamping piece (5) for locking the test piece (1), and the pressing seat (42) is provided with a locking piece for locking another test piece (1);
a lifting groove (4121) is formed in the top wall of the positioning portion (412) along the height direction of the positioning portion (412), the lifting groove (4121) is communicated with the side wall of the positioning portion (412) close to one side of the mounting portion (411), a positioning plate (413) is slidably mounted in the lifting groove (4121), two ends of the positioning plate (413) are fixedly connected with limiting plates (414), limiting grooves are formed in the side walls of two sides of the lifting groove (4121) along the height direction of the positioning portion (412), and the limiting plates (414) are in sliding fit with the limiting grooves; one end of the positioning part (412) far away from the mounting part (411) is provided with a positioning part (415) for fixing the position of the positioning plate (413).
4. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 3, wherein: mounting groove (4111) has been seted up on the roof of installation department (411), test specimen (1) cooperates with mounting groove (4111) joint, flexible groove (53) have been seted up on the lateral wall of mounting groove (4111), joint spare (5) are including joint spring (51) and joint piece (52), joint spring (51) one end links to each other with the tank bottom of flexible groove (53), the other end of joint spring (51) links to each other with joint piece (52), joint piece (52) and flexible groove (53) sliding fit, joint piece (52) support tightly with the lateral wall of test specimen (1).
5. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 3, wherein: the side wall of one side, close to the base (41), of the pressing seat (42) is provided with a moving groove (421), the locking piece comprises a bidirectional screw rod (4221), a rotating handle (4222) and a clamping block (4223), the bidirectional screw rod (4221) is arranged in the moving groove (421) along the length direction of the moving groove (421), two ends of the bidirectional screw rod (4221) are respectively connected with the side walls at two ends of the moving groove (421) in a rotating manner, the rotating handle (4222) is connected to the side wall of one side of the pressing seat (42) in a rotating manner, the rotating handle (4222) penetrates through the side wall of the pressing seat (42) to be fixedly connected with the bidirectional screw rod (4221), two ends of the moving groove (421) are respectively connected with the clamping block (4223) in a sliding manner, the clamping block (4223) is in threaded fit with the bidirectional screw rod (4221), the side walls, opposite to the two clamping blocks (4223) are provided with friction grains (4224), the center of the bottom of the moving groove (421) is fixedly connected with a butting block (4225), the thickness of butt joint piece (4225) is less than the degree of depth of shifting chute (421), two-way screw rod (4221) pass butt joint piece (4225) and rotate with butt joint piece (4225) and link to each other, another test specimen (1) and shifting chute (421) joint, the lateral wall counterbalance of centre gripping piece (4223) and test specimen (1), butt joint piece (4225) and test specimen (1) looks butt.
6. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 2, wherein: the positioning piece (415) comprises two screw rod (4151) groups respectively arranged at two sides of the positioning part (412), each screw rod (4151) group comprises two screw rods (4151) respectively arranged at the upper side and the lower side of the limiting plate (414), the positioning part (412) is provided with driving handles (4152) corresponding to the screw rods (4151) one by one, the driving handles (4152) penetrate through the side wall of the positioning part (412) and are fixedly connected with the screw rods (4151), the driving handles (4152) are rotatably connected with the positioning part (412), a sliding groove (416) matched with the screw rods (4151) is formed in the positioning part (412) along the length direction of the limiting plate (414), the length of the sliding groove (416) is larger than that of the limiting plate (414), one end of the screw rod (4151) far away from the end connected with the driving handles (4152) is rotatably connected with the side wall of the sliding groove (416), and the sliding block (4153) is installed in the sliding groove (416) in a sliding mode, the sliding block (4153) is in threaded connection with the screw rod (4151), one side, close to the limiting plate (414), of the sliding block (4153) is connected with a positioning ball (4154), the upper side and the lower side of the limiting plate (414) are provided with abutting grooves (4155) in sliding fit with the positioning ball (4154), and the side wall of one end, in the length direction, of the sliding groove (416) is provided with an accommodating groove (417) used in fit with the positioning ball (4154); when the positioning ball (4154) above the limiting plate (414) is abutted against the abutting groove (4155), the limiting plate (414) is abutted against the lower side wall of the limiting groove, and when the positioning ball (4154) below the limiting plate (414) is abutted against the abutting groove (4155), the limiting plate (414) is abutted against the upper side wall of the limiting groove.
7. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 1, wherein: transmission device includes frame (21), first driving roller (22), second driving roller (23) and drive belt (24), first driving roller (22) and second driving roller (23) rotate respectively and connect in the both ends of frame (21), install drive belt (24) on first driving roller (22) and second driving roller (23), install motor (25) on the lateral wall of frame (21), the output shaft of motor (25) passes the fixed linking to each other of axis of rotation of frame (21) and first driving roller (22), system appearance device (4) is located on drive belt (24), heating device locates the one end of frame (21).
8. The method for testing the interfacial adhesion of the hot melt adhesive and the silicone adhesive according to claim 6, wherein: the heating device comprises a heating box body (31), the heating box body (31) is connected with the rack (21), an introducing port (32) is formed in one side of the heating box body (31), a sealing cover (33) used for sealing the introducing port (32) is arranged on the heating box body (31), and a heating sheet (34) and a humidifier are arranged in the heating box body (31).
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| CN202111301753.2A CN114062253B (en) | 2021-11-04 | 2021-11-04 | Method for testing interface adhesion force of hot melt adhesive and silicone adhesive |
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| CN114849285A (en) * | 2022-06-06 | 2022-08-05 | 牛小龙 | Preparation device and preparation method of high-strength building reinforcing adhesive |
| CN117990460A (en) * | 2024-01-05 | 2024-05-07 | 浙江联洋新材料股份有限公司 | Composite material shear sample preparation tool and sample preparation method |
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| CN114062253B (en) | 2024-08-13 |
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