CN114062253B - Method for testing interface adhesion force of hot melt adhesive and silicone adhesive - Google Patents
Method for testing interface adhesion force of hot melt adhesive and silicone adhesive Download PDFInfo
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- CN114062253B CN114062253B CN202111301753.2A CN202111301753A CN114062253B CN 114062253 B CN114062253 B CN 114062253B CN 202111301753 A CN202111301753 A CN 202111301753A CN 114062253 B CN114062253 B CN 114062253B
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- 238000012360 testing method Methods 0.000 title claims abstract description 181
- 239000013464 silicone adhesive Substances 0.000 title claims abstract description 54
- 239000004831 Hot glue Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000000853 adhesive Substances 0.000 claims abstract description 35
- 230000001070 adhesive effect Effects 0.000 claims abstract description 35
- 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 42
- 238000002360 preparation method Methods 0.000 claims description 28
- 230000002457 bidirectional effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000007718 adhesive strength test Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 229920000297 Rayon Polymers 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
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009864 tensile test Methods 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
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000013011 mating Effects 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
Classifications
-
- 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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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application relates to the field of adhesive strength test, and in particular discloses a method for testing interface adhesive force of hot melt adhesive and silicone adhesive, which comprises the following steps: placing a hot melt adhesive sample on one test piece, coating silicone adhesive on the hot melt adhesive sample, placing the other test piece on the silicone adhesive, extruding two test pieces to enable the thickness of the silicone adhesive to be 2mm, heating the hot melt adhesive sample and continuously extruding the two test pieces to enable the thickness of the hot melt adhesive sample to be 2mm, waiting for curing the hot melt adhesive, and testing the shearing strength between the hot melt adhesive and the silicone adhesive by stretching the two test pieces; the application has the advantage of conveniently detecting the bonding strength between two kinds of adhesive.
Description
Technical Field
The application relates to the field of adhesive strength testing, in particular to a method for testing interface adhesive force of hot melt adhesive and silicone adhesive.
Background
Shear strength testing is typically used to test the adhesion of an adhesive to a substrate, using the same substrate to bond with the adhesive, and then stretching the substrate using a tensile tester to test the adhesion between the adhesive and the substrate.
However, with the development of adhesive technology and other industry technologies, two or more adhesives are generally used in bonding, that is, one adhesive is applied to a substrate, then another adhesive is applied to the adhesive, and finally another substrate is bonded. Therefore, the bonding strength of the measured adhesive is different from that of the traditional adhesive, and the bonding strength between the two adhesives needs to be tested to make objective evaluation.
Therefore, the conventional sample preparation test method is not suitable any more, and a new method is required to test the bonding strength between two adhesives.
Disclosure of Invention
In order to conveniently test the bonding strength between two adhesives, the application provides a method for testing the interfacial bonding strength of hot melt adhesive and silicone adhesive.
The application provides a method for testing interface adhesion force of hot melt adhesive and silicone adhesive, which adopts the following technical scheme:
A method for testing interface adhesion force of hot melt adhesive and silicone adhesive comprises the following steps:
s1, processing 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 a film, 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 curing of the silicone adhesive to obtain a test piece;
S3, after the silicone adhesive is solidified, heating the test piece and continuously extruding two test pieces to enable the thickness of the sample piece to be 2+/-0.2 mm, and cutting off the redundant adhesive overflowing the test piece by using a cutting knife;
s4, curing the test piece treated in the step S3 under the conditions of 23+/-2 ℃ and 50+/-5% of relative humidity;
S5, after maintenance is finished, two test pieces are stretched for testing 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, earlier fix a position through hot melt adhesive film sample to the position and the area of bonding, then scribble the silicone adhesive and bond hot melt adhesive film and test block, finally bond hot melt adhesive film and another test block through heating and extruded mode to because the bonding strength between test block 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 shearing strength between two test blocks of test block of testing.
Preferably, the test strip comprises a strip body, wherein the strip body is provided with an adhesive part and a matching part, the adhesive part is used for coating the glue to be tested, and the matching part is used for connecting with test equipment matched with the test strip.
Through adopting above-mentioned technical scheme, the bonding portion of test piece is used for coating the viscose, and cooperation portion is used for linking to each other with test equipment to test piece when the test is accomplished is cleared up more easily, can carry out reuse.
Preferably, the test equipment comprises a transmission device, a heating device and a sample preparation device, wherein the heating device and the sample preparation device are connected with the transmission device, and the transmission device is used for conveying the sample preparation device into the heating device;
The sample preparation device comprises a base, a pressing seat arranged above the base and a driving piece for driving the pressing seat to move close to or far away from the base, wherein guide rods are fixedly connected with the base at four corners of the base, the pressing seat is connected with the guide rods in a sliding manner, one side, away from the base, of the pressing seat is provided with an installation 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 a mounting part for mounting the test piece and a positioning part for positioning the height of the pressing seat, and the thickness of the positioning part is larger than that of the mounting 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;
the lifting groove is formed in the top wall of the positioning part along the height direction of the positioning part, the lifting groove is communicated with the side wall of the positioning part, which is close to one side of the installation part, the positioning plate is slidably installed in the lifting groove, the two ends of the positioning plate are fixedly connected with the limiting plates, the side walls on the two sides of the lifting groove are provided with the limiting grooves along the height direction of the positioning part, and the limiting plates are in sliding fit with the limiting grooves; one end of the positioning part far away from the mounting part is provided with a positioning piece for fixing the position of the positioning plate.
Through adopting above-mentioned technical scheme, a test block passes through the joint spare to be fixed in the installation department, and another test block passes through the locking piece to be locked on pressing the seat, presses the test block that the seat received the drive of driving piece to drive the top and pushes down, and when two test blocks were close to the back, the adhesive tape thickness that the rethread setting element adjusted the height of locating plate made between two test blocks was certain, reached the standard, and the preparation of test sample 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 piece and mounting groove joint cooperation, the flexible groove has been seted up on the lateral wall of mounting groove, the joint spare includes joint spring and joint piece, joint spring one end links to each other with the tank bottom of flexible groove, the other end and the joint piece of joint spring link to each other, joint piece and flexible groove sliding fit, the lateral wall butt of joint piece and test piece tightly.
Through adopting above-mentioned technical scheme, when the test block is installed on the installation department, correspond test block and mounting groove earlier, then press down the test block and get into the mounting groove in, the joint piece is pressed into the expansion tank to under the effort of joint spring, the joint piece supports the test block tightly in the mounting groove.
Preferably, the movable groove has been seted up on the lateral wall that the seat is close to one side of base to the pressing, the locking piece includes two-way screw rod, rotation handle and grip block, two-way screw rod locates the movable inslot along the length direction of movable groove, two ends of two-way screw rod rotate with the lateral wall at movable groove both ends respectively and link to each other, the rotation handle rotates to be connected on the lateral wall of pressing one side of seat, the rotation handle passes the lateral wall of pressing the seat and links to each other with two-way screw rod is fixed, the both ends of movable groove have the grip block respectively sliding connection, grip block and two-way screw rod screw thread fit, two friction lines have been seted up on the lateral wall that the grip block is relative, movable groove tank bottom center fixedly connected with butt piece, the thickness of butt piece is less than the degree of depth of movable groove, two-way screw rod passes the butt piece and links to each other with the butt piece rotation, another test block and movable groove joint, grip block and test block's lateral wall tight, butt piece and test block butt.
Through adopting above-mentioned technical scheme, when pressing the test block installation on the seat, rotate the rotation handle earlier, rotate the handle and drive two-way screw rod rotation, two grip blocks are kept away from each other in two screw rod rotations drive, 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, reverse rotation again rotates the handle, two grip blocks are close to each other in two screw rod drive when reverse rotation to with the test block centre gripping to pressing on the seat. The test piece is installed on the pressing seat conveniently and rapidly, and the efficiency is high.
Preferably, the locating piece comprises two screw rod groups which are respectively arranged at two sides of the locating part, each screw rod group comprises two screw rods which are respectively arranged at the upper side and the lower side of the limiting plate, the locating part is provided with driving handles which are in one-to-one correspondence with the screw rods, the driving handles penetrate through the side walls of the locating part and are fixedly connected with the screw rods, the driving handles are rotationally connected with the locating part, sliding grooves matched with the screw rods are formed in the locating part along the length direction of the limiting plate, the length of each sliding groove is longer than that of the limiting plate, one end, far away from the screw rods, connected with the driving handles is rotationally connected with the side walls of the sliding grooves, sliding blocks are slidably arranged in the sliding grooves and are in threaded connection with the screw rods, one side, close to the limiting plate, of each sliding block is provided with a locating ball, and the upper side and the lower side of each limiting plate are provided with a butt groove matched with the locating ball in a sliding way, and the side wall at one end in the length direction of the sliding grooves is provided with a containing groove matched with the locating ball. When the positioning ball above the limiting plate is abutted with the abutting groove, the limiting plate is abutted with the lower side wall of the limiting groove, and when the positioning ball below the limiting plate is abutted with the abutting groove, the limiting plate is abutted with the upper side wall of the limiting groove.
Through adopting above-mentioned technical scheme, when carrying out the location to the locating plate, rotate the actuating lever that is located the locating plate below, the actuating lever drives the screw rod and rotates, and screw rod drive sliding block slides, drives locating ball and butt groove butt when the sliding block slides to promote the locating plate to upwards support tightly, make the locating plate be in the highest department. When the height of the locating plate is adjusted, the driving handle positioned below the locating plate is reversely rotated, so that the sliding block drives the locating ball to be separated from the abutting groove and enter the accommodating groove. And then the driving handle above the positioning plate is rotated, the driving handle drives the screw rod to rotate, the screw rod drives the sliding block to slide, and the positioning ball is driven to abut against the abutting groove when the sliding block slides, so that the positioning plate is pushed to abut downwards, and the positioning plate is positioned at the lowest position. The height of the locating plate can be adjusted, so that when the test piece on the pressing seat is matched with the test piece on the base for bonding, the thickness of the adhesive between the two test pieces is easier to adjust, and the adhesive is more accurate and convenient.
Preferably, the transmission device comprises a frame, a first driving roller, a second driving roller and a driving belt, wherein the first driving roller and the second driving roller are respectively connected to two ends of the frame in a rotating mode, the driving belt is arranged on the first driving roller and the second driving roller, a motor is arranged on the side wall of the frame, an output shaft of the motor penetrates through the frame to be fixedly connected with a rotating shaft of the first driving roller, the sample preparation device is arranged on the driving belt, and the heating device is arranged at one end of the frame.
Through adopting above-mentioned technical scheme, transmission device utilizes the drive belt to carry sample preparation device into heating device in heating, and sample preparation device after the heating also can shift out heating device through the drive belt to the heating of viscose in the sample preparation device is convenient and fast more.
Preferably, the heating device comprises a heating box body, the heating box body is connected with the frame, an inlet is formed in one side of the heating box body, a sealing cover for sealing the inlet is arranged on the heating box body, and a heating plate and a humidifier are arranged in the heating box body.
Through adopting above-mentioned technical scheme, heat the appearance device through the heating plate in the heating box, adjust humidity through the humidifier to make the viscose in the appearance device can control and soften bonding or maintenance in stable environment, reduce environmental factor's interference.
In summary, the application has the following beneficial effects:
1. The application adopts the test piece and the test equipment to prepare the shear strength test piece, and the test sample preparation efficiency is improved by conveniently installing the test piece and conveniently controlling the distance between the test pieces;
2. The application adopts a mode of solidifying one adhesive to bond, so that the bonding thickness and bonding area of two adhesives are more conveniently controlled, the error rate is reduced, and the measuring accuracy is improved.
Drawings
FIG. 1 is a perspective view of a test strip according to an embodiment of the present application;
FIG. 2 is a perspective view of a test apparatus in an embodiment of the application;
FIG. 3 is a perspective view of a sample preparation device according to an embodiment of the present application;
FIG. 4 is a perspective view of a base and mount in an embodiment of the application;
FIG. 5 is a cross-sectional view of a base showing the structure of a clip on a mounting portion according to an embodiment of the present application;
FIG. 6 is a perspective view of a locating plate, a limiting plate and a locating member according to an embodiment of the present application;
FIG. 7 is a cross-sectional view of a base showing the connection of a positioning plate, a limiting plate, a positioning member and the base in an embodiment of the present application;
Fig. 8 is a perspective view of the pressing seat and the locking member in the embodiment of the present application.
Reference numerals: 1. a test strip; 11. an adhesive part; 12. a mating portion; 13. a first test strip; 21. a frame; 22. a first driving roller; 23. a second driving roller; 24. a transmission belt; 25. a motor; 31. heating the box body; 32. an inlet; 33. a closing cap; 34. a heating sheet; 4. a sample preparation device; 41. a base; 411. a mounting part; 4111. a mounting groove; 412. a positioning part; 4121. a lifting groove; 413. a positioning plate; 414. a limiting plate; 415. a positioning piece; 4151. a screw; 4152. a drive handle; 4153. a sliding block; 4154. a positioning ball; 4155. an abutment groove; 416. a sliding groove; 417. a receiving groove; 42. a pressing seat; 421. a moving groove; 4221. a bidirectional screw; 4222. a rotating handle; 4223. a clamping block; 4224. rubbing lines; 4225. an abutment block; 43. a driving member; 44. a guide rod; 45. a guide hole; 46. a mounting base; 5. a clamping piece; 51. a clamping spring; 52. a clamping block; 53. a telescopic slot.
Detailed Description
The application is described in further detail below with reference to figures 1-8 and examples.
Particularly, the hot melt adhesive adopts a JS-300SG reactive type butyl hot melt adhesive for hollow glass of Hangzhou river chemical industry Co Ltd; the silicone adhesive is JS-2000 silicone adhesive of Hangzhou river chemical industry Co., ltd.
Examples
Example 1
The utility model provides a test block, includes the test block body, the test block body comprises bonding portion 11 and cooperation portion 12, is used for coating the glue that awaits measuring on the bonding portion 11, and cooperation portion 12 is used for linking to each other with the test equipment that test block 1 cooperation was used.
A test apparatus comprises a transport device, a heating device and a sample preparation device 4. The transport means is used to transport the sample preparation device 4 into or out of the heating means. Two test pieces 1 are adhered by the sample preparation device 4, and the two test pieces 1 are a first test piece 13 and a second test piece 1 respectively.
Specifically, the conveying device includes a frame 21, a first driving roller 22, a second driving roller 23, and a driving 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 arranged on the side wall of the frame 21, and an output shaft of the motor 25 penetrates through the side wall of the frame 21 and is connected with a rotating shaft of the first driving roller 22 through a coupler. 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 drive, 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 apparatus 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 approach or separate from the base 41.
The base 41 is stepped, and specifically, the base 41 is composed of a mounting portion 411 having a smaller thickness and a positioning portion 412 having a larger 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 seat 42 presses the second test strip 1.
The top wall of the mounting portion 411, which is close to the positioning portion 412, is provided with a mounting groove 4111, and the first test strip 13 is in clamping fit with the mounting groove 4111. The mounting portion 411 is further provided with a clamp 5 for locking the first test piece 13, and the clamp 5 includes a clamp spring 51 and a clamp block 52. The side wall of the mounting groove 4111 is provided with a telescopic groove 53, the clamping spring 51 is arranged in the telescopic groove 53, one end of the clamping spring 51 is fixedly connected with the bottom of the telescopic groove 53, the clamping block 52 is fixedly connected with the other end of the clamping spring 51, and the clamping block 52 is in sliding fit with the telescopic groove 53. 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 part 412 near the mounting part 411 is provided with a lifting groove 4121, and the lifting groove 4121 is communicated with the side wall of the positioning part 412 near the mounting part 411. Limiting grooves are formed in the side walls on two sides of the lifting groove 4121 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 part 412, and limiting plates 414 are fixedly connected to the side walls on two sides of the positioning plate 413, and the limiting plates 414 are slidably matched with the limiting grooves. The positioning part 412 is also provided with a positioning piece 415 for positioning the position of the limiting plate 414.
The two side walls of the limiting groove along the thickness direction of the positioning part 412 are provided with sliding grooves 416, and the length of the sliding grooves 416 is greater 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 communicates with the sliding groove 416.
The positioning member 415 includes two sets of screws 4151 disposed on two sides of the positioning portion 412, where each set of screws 4151 includes two screws 4151 disposed on two sides of the limiting plate 414, and the screws 4151 are disposed in the sliding groove 416. One end of the screw 4151 is rotatably connected to a side wall of one end of the slide groove 416, and the other end of the screw 4151 is rotatably connected to a side wall of the other end of the slide groove 416. The side wall of the locating part 412 away from the mounting part 411 is rotatably connected with driving handles 4152 corresponding to the screw rods 4151 one by one, and the driving handles 4152 penetrate through the side wall of the locating part 412 to be fixedly connected with the screw rods 4151. The screw 4151 is driven to rotate by rotating the driving lever 4152.
The positioning member 415 further comprises a sliding block 4153 slidably mounted in the sliding groove 416, a threaded hole is formed in the sliding block 4153, and the screw 4151 is in threaded fit with the threaded hole. When the screw 4151 rotates, the slider 4153 slides in the slide groove 416 due to being restrained by the slide groove 416.
The positioning member 415 further includes a positioning ball 4154 fixedly coupled to a side wall of the slider 4153 adjacent to the stop plate 414. The side walls on the upper and lower sides of the limiting plate 414 are provided with abutting grooves 4155 along the length direction of the limiting plate 414, and the positioning balls 4154 can abut against the abutting grooves 4155. When the positioning ball 4154 above the limiting plate 414 abuts against the abutting groove 4155 on the upper side wall of the limiting plate 414, the positioning ball 4154 below the limiting plate 414 is located in the accommodating groove 417, the limiting plate 414 abuts against the lower side wall of the limiting groove, the positioning plate 413 abuts against the lower side wall of the lifting groove 4121, and at this time, the height of the positioning plate 413 is the lowest. When the positioning ball 4154 below the limiting plate 414 abuts against the abutting groove 4155 on the lower side wall of the limiting plate 414, the positioning ball 4154 above the limiting plate 414 is located in the accommodating groove 417, the limiting plate 414 abuts against the upper side wall of the limiting groove, the positioning plate 413 abuts against the upper side wall of the lifting groove 4121, and at this time, the height of the positioning plate 413 is highest.
Guide rods 44 are fixedly connected to the top wall of the vertical base 41 on the four corners of the base 41, guide holes 45 matched with the guide rods 44 are formed in the four corners of the pressing seat 42, and the guide rods 44 are in one-to-one sliding fit with the guide holes 45. One side of the pressing seat 42, which is away from the base 41, is provided with a mounting seat 46, the mounting seat 46 is fixedly connected with four guide rods 44, and the driving piece 43 is arranged on the mounting seat 46, and in this embodiment, the driving piece 43 adopts an air cylinder. Piston rod of air cylinder passes through and installs and do and press seat 42 are fixedly connected to a side wall facing away from the base 41. The lifting movement of the pressing seat 42 toward or away from the base 41 is achieved by the driving of the cylinder piston rod.
The side wall of the pressing seat 42, which is close to one side of the base 41, is provided with a locking piece for locking the second test piece.
The side wall of one side of the pressing seat 42, which is close to the base 41, is provided with a moving groove 421, and the locking member comprises 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 rotationally connected with the side wall of one end of the moving groove 421, and the other end of the bidirectional screw 4221 is rotationally connected with the side wall of the other end of the moving groove 421. The locking member further includes a rotation handle 4222 rotatably coupled to a side wall of the pressing base 42, and the rotation handle 4222 is fixedly coupled to the bi-directional screw 4221 through the side wall of the pressing base 42. Two ends of the bidirectional screw 4221 are respectively connected with clamping blocks 4223 in a threaded manner, the clamping blocks 4223 are in sliding fit with the moving grooves 421, and friction lines 4224 are formed in the opposite side walls of the two clamping blocks 4223. By rotating the rotation handle 4222, the rotation handle 4222 drives the bi-directional screw 4221 to rotate, and the bi-directional screw 4221 rotates to drive the clamping blocks 4223 at two ends of the bi-directional screw 4221 to approach each other.
An abutting block 4225 is fixedly connected to the bottom center of the moving groove 421, and a bidirectional screw 4221 passes through the abutting block 4225 and is rotatably connected with the abutting block 4225. The second test piece 1 is disposed between the two clamping blocks 4223 and clamped by the two clamping blocks 4223, the side wall of the second test piece 1 abuts against the abutting block 4225, and the sum of the thickness of the second test piece 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 inlet 32 for leading in the sample preparation device 4 is formed in the side wall of the heating box body 31 facing the sample preparation device 4, and a closing cover 33 for closing the inlet 32 is further hinged on the side wall of the heating box body 31. A plurality of heating plates 34 and a humidifier are fixedly connected to the inner side wall of the heating box 31.
A method for testing interface adhesion force of hot melt adhesive and silicone adhesive comprises the following steps:
Both the first test piece 13 and the second test piece 1 are glass test pieces.
S1, heating the hot melt adhesive in a baking 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;
S2, cleaning the first test piece 13 and the second test piece 1 by using 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 seat 42. Cutting a film to form 25mm x 25mm sample pieces, placing the sample pieces on a first test piece 13, coating silicone adhesive on the sample pieces, starting an air cylinder of a sample preparation device 4, pressing a second test piece 1 onto the silicone adhesive, and enabling a positioning plate 413 in the sample preparation device 4 to be at the highest position, wherein the surface of the positioning plate 413 is 4.5mm away from the surface of the first test piece 13;
S3, after the silicone adhesive is solidified, the sample preparation device 4 is sent into a heating device through a transmission device and heated for 15min at 80 ℃, then the position of the positioning plate 413 is adjusted to the lowest position, at the moment, the distance between the surface of the positioning plate 413 and the surface of the first test piece 13 is 4mm, then a cylinder is started to push the pressing seat 42 so that the second test piece 1 is attached to the positioning plate 413, the thickness of a sample is 2mm, and a cutting knife is used for cutting off redundant colloid;
s4, curing the test piece treated in the step S3 for 8 hours at 25 ℃ under the condition of 50% of relative humidity;
And S5, stretching the two test pieces 1 at a separation speed of 50mm/min by a tensile testing machine after curing is finished, and testing the bonding strength between the hot melt adhesive and the silicone adhesive.
Comparative example
Comparative example 1
A method for testing interface adhesion force of hot melt adhesive and silicone adhesive comprises the following steps:
the first test piece and the second test piece are glass test pieces.
S1: the method comprises the steps of coating a silicone adhesive with the area of 15mm multiplied by 25mm on the surface of a first test piece, wherein the thickness of the coated silicone adhesive is 2.5mm, then placing a hot melt adhesive film with the area of 15mm multiplied by 25mm and the thickness of 2mm on the surface of the silicone adhesive, placing a second test piece on the surface of the hot melt adhesive film, pressing the first test piece and the second test piece by using 30N pressure, and waiting for curing of the silicone adhesive.
S2: after the silicone adhesive is solidified, the hot melt adhesive film is heated to 80 ℃ for 15min, the first test piece and the second test piece are continuously pressed by 30N pressure, and a cutter is used for cutting off redundant adhesive.
S3, curing the test piece treated in the step S2 for 8 hours at 25 ℃ under the condition of 50% of relative humidity;
And S4, stretching the two test pieces at a separation speed of 50mm/min by a tensile testing machine after curing is finished, and testing the bonding strength between the hot melt adhesive and the silicone adhesive.
Comparative example 2
Comparative example 2 is different from example 1 in that the thickness of the cured silicone adhesive was controlled to be 1mm and the thickness of the cured hot melt adhesive was controlled to be 2mm.
Comparative example 3
Comparative example 3 is different from example 1 in that the thickness of the cured silicone adhesive was controlled to be 2mm and the thickness of the cured hot melt adhesive was controlled to be 1mm.
Test results
And (3) observing the surface of the sample after the test of the tensile tester, 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 the combination of table 1 that when the first test piece and the second test piece obtained by using the test device of the present application to prepare samples are used for bonding samples, the test results are more accurate, the error is small, and the test results of comparative example 1 show that the bonding strength between the prepared first test piece and second test piece can be kept within a certain range, but each time has a larger accidental error, so the mode adopted by the present application is more accurate.
It can be seen from the combination of example 1, comparative example 2 and comparative example 3 and the combination of table 1 that if the thickness of the silicone adhesive or the hot melt adhesive is too small, it is easy to cause the thinner adhesive to be detached from the test piece when the adhesive strength is tested, so that it is impossible to determine whether the resulting adhesive strength is the adhesive strength between the test piece and the adhesive or the adhesive strength between the adhesives.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (4)
1. The method for testing the interface adhesion force of the hot melt adhesive and the silicone adhesive is characterized in that a test piece (1) and test equipment are adopted in the method for testing the interface adhesion force of the hot melt adhesive and the silicone adhesive to prepare a test piece;
The test strip (1) comprises a strip body, wherein an adhesive part (11) and a matching part (12) are arranged on the strip body, the adhesive part (11) is used for coating glue to be tested, and the matching part (12) is used for being connected with the test equipment matched with the test strip (1);
The testing equipment comprises a transmission device, a heating device and a sample preparation device (4), wherein the heating device and the sample preparation device (4) are connected with the transmission device, and the transmission device is used for conveying the sample preparation device (4) into 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 away from the base (41), guide rods (44) are fixedly connected to the four corners of the base (41) perpendicular to the base (41), the pressing seat (42) is slidably connected with the guide rods (44), a mounting seat (46) is arranged on one side, deviating from the base (41), of the pressing seat (42), of the mounting seat (46) and the guide rods (44) are fixedly connected, 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) is in a step shape, the base (41) comprises a mounting part (411) for mounting the test piece (1) and a positioning part (412) for positioning the height of the pressing seat (42), and the thickness of the positioning part (412) is larger 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 the other test piece (1);
Lifting grooves (4121) are formed in the top wall of the positioning part (412) along the height direction of the positioning part (412), the lifting grooves (4121) are communicated with the side wall, close to the mounting part (411), of the positioning part (412), positioning plates (413) are slidably mounted in the lifting grooves (4121), limiting plates (414) are fixedly connected to the two ends of the positioning plates (413), limiting grooves are formed in the side walls of the two sides of the lifting grooves (4121) along the height direction of the positioning part (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 piece (415) for fixing the position of the positioning plate (413);
The side wall of the pressing seat (42) close to one side of the base (41) 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 way, the rotating handle (4222) is connected onto the side wall at one side of the pressing seat (42) in a rotating way, 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 movable groove (421) are respectively and slidably connected with a clamping block (4223), the clamping blocks (4223) are in threaded fit with a bidirectional screw rod (4221), friction lines (4224) are formed on the opposite side walls of the two clamping blocks (4223), the center of the groove bottom of the movable groove (421) is fixedly connected with an abutting block (4225), the thickness of the abutting block (4225) is smaller than the depth of the movable groove (421), the bidirectional screw rod (4221) penetrates through the abutting block (4225) and is rotationally connected with the abutting block (4225), the other test piece (1) is in clamping connection with the movable groove (421), the clamping block (4223) abuts against the side wall of the other test piece (1), the abutting block (4225) is abutted with the other test piece (1); the sum of the thickness of the other test piece (1) and the thickness of the abutting block (4225) is greater than the depth of the moving groove (421);
the positioning piece (415) comprises two groups of screw rods (4151) which are respectively arranged at two sides of the positioning part (412), each group of screw rods (4151) comprises two screw rods (4151) which are 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) which are in one-to-one correspondence with the screw rods (4151), the driving handles (4152) penetrate through the side walls of the positioning part (412) to be fixedly connected with the screw rods (4151), the driving handles (4152) are rotationally connected with the positioning part (412), the positioning part (412) is internally provided with sliding grooves (416) which are matched with the screw rods (4151) along the length direction of the limiting plate (414), the length of each sliding groove (416) is larger than that of the limiting plate (414), one end of each sliding groove (4151) which is far away from the driving handle (4152) is rotationally connected with the side wall of each sliding groove (416), the sliding blocks (4153) are slidably arranged in the sliding grooves (416), the sliding blocks (4153) are connected with the sliding blocks (4153) in the sliding grooves (4155) in a sliding mode, the sliding grooves (4155) are connected with the two sides of the sliding plates (414) in a sliding mode, the sliding grooves (414) which are in a sliding mode, and the sliding grooves (4155) are in a sliding mode, a containing groove (417) matched with the positioning ball (4154) is formed in the side wall of one end of the sliding groove (416) in the length direction; when the positioning ball (4154) above the limiting plate (414) is abutted with the abutting groove (4155) on the upper side wall of the limiting plate (414), the positioning ball (4154) below the limiting plate (414) is positioned in the accommodating groove (417), the limiting plate (414) is abutted with the lower side wall of the limiting groove, and when the positioning ball (4154) below the limiting plate (414) is abutted with the abutting groove (4155) on the lower side wall of the limiting plate (414), the positioning ball (4154) above the limiting plate (414) is positioned in the accommodating groove (417), and the limiting plate (414) is abutted with the upper side wall of the limiting groove;
the test method comprises the following steps:
s1, processing 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 a film, 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 curing of the silicone adhesive to obtain a test piece;
s3, after the silicone adhesive is solidified, heating the test piece and continuously extruding two test pieces (1) to enable the thickness of the hot melt adhesive sample wafer to be 2+/-0.2 mm, and cutting off redundant colloid overflowing the test pieces by using a cutting knife;
s4, curing the test piece treated in the step S3 under the conditions of 23+/-2 ℃ and 50+/-5% of relative humidity;
S5, after maintenance is finished, two test pieces (1) are stretched for testing 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 between a hot melt adhesive and a silicone adhesive according to claim 1, wherein the method comprises the following steps: the top wall of the mounting part (411) is provided with a mounting groove (4111), the test piece (1) is matched with the mounting groove (4111) in a clamping mode, the side wall of the mounting groove (4111) is provided with a telescopic groove (53), the clamping piece (5) comprises a clamping spring (51) and a clamping block (52), one end of the clamping spring (51) is connected with the groove bottom of the telescopic groove (53), the other end of the clamping spring (51) is connected with the clamping block (52), the clamping block (52) is matched with the telescopic groove (53) in a sliding mode, and the clamping block (52) is abutted to the side wall of the test piece (1).
3. The method for testing the interfacial adhesion between a hot melt adhesive and a silicone adhesive according to claim 1, wherein the method comprises the following steps: the conveying device comprises a frame (21), a first driving roller (22), a second driving roller (23) and a driving belt (24), wherein the first driving roller (22) and the second driving roller (23) are respectively connected to two ends of the frame (21) in a rotating mode, the driving belt (24) is arranged on the first driving roller (22) and the second driving roller (23), a motor (25) is arranged on the side wall of the frame (21), an output shaft of the motor (25) penetrates through the frame (21) and is fixedly connected with a rotating shaft of the first driving roller (22), the sample preparation device (4) is arranged on the driving belt (24), and the heating device is arranged at one end of the frame (21).
4. A method for testing interfacial adhesion between a hot melt adhesive and a silicone adhesive according to claim 3, wherein: the heating device comprises a heating box body (31), the heating box body (31) is connected with the frame (21), an inlet (32) is formed in one side of the heating box body (31), a sealing cover (33) used for sealing the inlet (32) is arranged on the heating box body (31), and a heating plate (34) and a humidifier are arranged in the heating box body (31).
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| CN117990460B (en) * | 2024-01-05 | 2024-08-27 | 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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|---|---|---|---|---|
| JP2006234801A (en) * | 2005-01-31 | 2006-09-07 | Mitsuboshi Belting Ltd | Instrument and method for measuring fixing strength |
| CN111307853A (en) * | 2019-11-29 | 2020-06-19 | 宝燕工业科技(南通)有限公司 | Device for testing heat shrinkage property of biaxially oriented polypropylene film and use method thereof |
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| JPH0795030B2 (en) * | 1990-05-23 | 1995-10-11 | カネボウ・エヌエスシー株式会社 | Bonding strength tester for hot melt adhesives |
| KR100838880B1 (en) * | 2002-07-30 | 2008-06-16 | 히다치 가세고교 가부시끼가이샤 | Adhesive material tape, method of connecting, producing, and press-connecting the tape |
| JP6543135B2 (en) * | 2015-08-26 | 2019-07-10 | 株式会社ディスコ | Adhesive tape peeling device |
| CN105385388B (en) * | 2015-12-23 | 2017-12-05 | 成都硅宝科技股份有限公司 | Butyl hot-melt glue and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006234801A (en) * | 2005-01-31 | 2006-09-07 | Mitsuboshi Belting Ltd | Instrument and method for measuring fixing strength |
| CN111307853A (en) * | 2019-11-29 | 2020-06-19 | 宝燕工业科技(南通)有限公司 | Device for testing heat shrinkage property of biaxially oriented polypropylene film and use method thereof |
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