JP3178931U - Adhesive peel force measuring device - Google Patents

Abstract

An adhesive peel force measuring device capable of changing to different peel angles and peel speeds is provided.
An adhesive peel force measuring device includes a force transducer 120 for measuring a peel force of a tape sample, a test thread 110 on which the tape sample is installed, and a slide table 132 on which the test thread 110 is installed. Slide 134, and a moving device 130 for moving the slide table 132 and the test sled 110, wherein the peel angle is defined by adjusting the first angle (angle A) and the second angle (angle B). , The first angle (angle A) is defined by the angle between the test sled 110 and the slide 134, and the second angle (angle B) is the force receiving direction of the force transducer 120 and the horizontal parallel plane H2 of the slide 134. Defined by the angle between.
[Selection] Figure 1

Description

  The present invention relates to an adhesive peel force measuring device that can be changed to different peel angles and peel speeds.

  Adhesive products such as adhesive tape are frequently used in medicine, industry, and daily life. Among adhesives, pressure sensitive adhesive products (PSA) are widely used in the aforementioned applications, meaning that PSA tapes are frequently used in many fields.

  In order to be able to use products made from PSA in different environments (different sea level, temperature, humidity, season), manufacturers need to develop adhesives with suitable properties. Currently, there are several standard test procedures for evaluating adhesion performance. All of these standard test procedures peel at a fixed speed and a fixed (90 ° or 180 °) peel angle at a constant temperature and humidity, and the peel strength of the sample adhesive (the peel force is measured in grams and kilograms). , Newtons, pounds, etc. are measured by weight). Table 1 below shows a conventional standard test method for reference.

  However, when a PSA product is used by a consumer, the working environment of the PSA product is never under a constant temperature or humidity, and when the PSA product is peeled from the article by the consumer, the PSA product is similarly constant. It is never peeled off at a peel speed or a specific peel angle (90 ° or 180 °). Accordingly, the laboratory peel simulation test results for all PSA products do not correspond to actual applications. Even if a PSA product is developed and evaluated according to current standard test methods, the product will lack adaptability and performance in practical applications.

  Therefore, the development of a peel adhesion test apparatus that can evaluate the peel adhesion at different temperatures, angles, and speeds is one of the most important issues.

  The objective of this invention is providing the apparatus which can evaluate the peeling force of an adhesive agent with a different peeling angle, peeling speed, and temperature conditions.

  In one embodiment, the present invention provides an adhesive peel force measuring device that can be changed to different peel angles and peel speeds.

  The peeling force measuring device of the present invention includes a force transducer for measuring a peeling force of a tape sample, and a peeling angle (angle C) defined by adjusting a first angle (angle A) and a second angle (angle B). Wherein the first angle (angle A) is defined by the angle between the test sled and the plate on which the test sled is disposed, and the second angle (angle B) is the force receiving direction of the force transducer. Defined by the angle between the horizontal parallel planes of the plate.

According to the present invention, the peeling angle (angle C) is:
C ° = 180 ° − (A ° + B °) and A ° = B °
Satisfy the condition of The force transducer and moving device are configured to maintain the peel angle (angle C), the first angle (angle A), and the second angle (angle B) constant during operation.

  In one embodiment of the present invention, the test thread is disposed on a plate. In an embodiment of the present invention, the plate is a slide provided with the moving device.

  In one embodiment of the present invention, the sample panel on which the adhesive tape is placed is a standard steel plate.

  In one aspect of the present invention, the adhesive peel force measuring device may selectively include a temperature-adjustable hot / cold plate for controlling the temperature, on the test thread under the sample panel. Be placed. During the test, a tape sample is affixed to the sample panel and the test must be performed until the hot / cold plate and the sample on the sample panel reach thermal equilibrium.

  In one aspect of the present invention, an apparatus for measuring the peel force of an adhesive can optionally include a computer control system. The computer control system is used for experimental setting, data recording, result evaluation and calculation, sample temperature, moving speed and peeling speed, angle A and angle B, and angle C (C ° = 180 ° − (A ° + B °). ), Where it can be set to record the peel angle including A ° = B °. The peel force data can be obtained by calculation of a computer control system.

  In one aspect of the present invention, the adhesive peel force measuring apparatus may selectively include a light source that irradiates a laser beam to a peel position on the test thread. The light source may be a laser pointer. The condition of A ° = B ° can be satisfied by adjusting the first angle (angle A) and the second angle (angle B). The peeling angle (angle C) can be determined by the equation C ° = 180 ° − (A ° + B °). The light spot can indicate the peeling start point of the tape sample. In the test, the tape sample or label is peeled from the peeling start point.

  In one aspect of the present invention, the adhesive peel force measuring device may selectively include a protractor for the first angle and the second angle. The first angle (angle A) can be adjusted by the first angle protractor, and the peel angle (angle C) can be calculated by the equation C ° = 180 ° − (A ° + B °) and A ° = B °. . The second angle (angle B) can be adjusted by the second angle protractor, and the peel angle (angle C) can also be calculated by the equation C ° = 180 ° − (A ° + B °) and A ° = B °. .

  In one aspect of the present invention, an adhesive peeling force measuring device includes a test sled, a sample panel, a plate on a slide provided with a moving device, a force transducer, a mast, a first angle adjusting device, a second angle adjusting device, Includes hot / cold plates with controllable temperature. The sample panel is loaded with a sample tape or label and placed on the test sled. The test sled on a plate on a slide with a moving device can move on the slide with a moving device at a constant speed. The force transducer is installed on the mast. A first angle adjustment device is installed on the test sled and the first angle (angle A) is defined by the angle between the test sled and the slide. The second angle adjusting device is installed on the force transducer, and the second angle (angle B) is defined by the angle between the force receiving direction of the force transducer and the horizontal parallel plane of the slide. The peeling angle (angle C) satisfies the conditions of C ° = 180 ° − (A ° + B °) and A ° = B °.

  In another aspect of the present invention, the adhesive peel force measuring device includes a test thread, a sample panel, a force transducer on a slide with a moving device, a mast, a first angle adjusting device, a second angle adjusting device, a temperature. Includes hot / cold plates that can be controlled. The force transducer on the slide with the moving device can move along the mast with the moving device at a constant speed on the slide, and the force transducer is installed on the mast.

  According to the present invention, the peel angle (angle C) is defined by adjusting the first angle (angle A) and the second angle (angle B), of which the first angle (angle A) is between the test sled and the slide. The second angle (angle B) is defined by the angle between the force receiving direction of the force transducer and the horizontal parallel plane of the slide. The T-type peeling angle (angle C) satisfies the conditions of C ° = 180 ° − (A ° + B °) and A ° = B °. The test sled or force transducer then moves with the moving device at a constant speed. The actual peeling speed can be calculated based on the peeling angle C and the moving speed.

  According to the present invention, the peeling angle can be set by adjusting the first angle (angle A) and the second angle (angle B), and the peeling speed can be adjusted through the speed setting of the moving device, so that various peeling speeds or angles can be set. Samples can be tested under different conditions. The peel force of the tape sample can be evaluated and recorded under different conditions. For this reason, it is possible to simulate the conditions under which the adhesive is actually used through the adhesive peel force measuring device.

  The present invention provides a computer control system for use in test setup and analysis in combination with the apparatus of the present invention. The computer control system includes a control module for setting a sample temperature, a moving speed, a peeling speed, the first angle, the second angle, and the third angle (peeling angle), and the setting parameter of the control module. A recording module for recording the data, an analysis module used for analyzing the peel force data, and a display module for displaying the analysis result of the analysis module.

According to the present invention, a method for measuring the peeling force of an adhesive is
Performing a set-up procedure for the apparatus configured to measure the peel force of the adhesive;
Among them, the setting procedure includes initializing a first angle (angle A), a second angle (angle B), and a peeling angle (angle C),
After adjusting the first angle on the test sled and the second angle from the force transducer, the peel angle is adjusted with an illumination source, of which the first angle and the second angle are equal,
Peeling the tape sample from the test sled under a peel rate (Va) and moving the test sled horizontally on the slide away from the force transducer under a moving speed (Vb);
Among these, the said peeling rate satisfy | fills following formula (1).

  The foregoing summary of the invention and the following detailed description can be better understood with reference to the following drawings.

It is a side view of one embodiment of the apparatus for measuring the peeling force of an adhesive agent. It is the schematic which shows each angle set when testing the peeling force of an adhesive agent with the apparatus of this invention. It is the schematic which shows the relationship between the 1st angle (angle A), the 2nd angle (angle B), the peeling angle (angle C), the moving speed (Vb), and the peeling speed (Va) in the apparatus of this invention. It is a graph which shows the relationship between the actual peeling speed and peeling angle under the fixed thread speed of 300 mm / min of the apparatus by this invention. Among them, the peeling speed varies depending on the angle even though the thread speed is constant. It is a graph which shows the thread | yarn speed | rate used by each test parameter in the apparatus of this invention in order to make each peeling speed | rate become a constant speed of 300 mm / min.

  The present invention provides an adhesive peel force measuring device that can be changed to different peel angles and peel speeds. The apparatus of the present invention includes a force transducer for measuring the peeling force of a tape sample, and a peeling angle (angle C) defined by adjusting a first angle (angle A) and a second angle (angle B). , Wherein the first angle (angle A) is defined by the angle between the test sled and the slide on which the test sled is disposed, and the second angle (angle B) is the force-receiving direction (force-) of the force transducer. bearing direction) and the angle between the horizontal parallel planes of the slide.

  As shown in the side view of the adhesive peel force measuring device of the present invention in FIG. 1, the device 100 of the embodiment of the present invention includes a slide 134 on which a slide base 132 is installed and a first angle adjusting device 140. A test sled 110 installed on the slide table 132, a hot / cold plate 160 installed between the test sled 110 and the sample panel 162, and a force transducer 120 installed through the second angle adjustment device 150. Mast 190 is included.

  The sample panel 162 on which a tape sample or label is placed is placed on the test sled 110. The test sled 110 on the slide table 132 moves with the moving device 130 at a constant speed on the slide 134. The first angle adjustment device 140 adjusts the first angle A, and the angle A is the angle between the test sled 110 and the horizontal plane (H1) of the slide 134. The second angle adjustment device 150 adjusts the second angle B, and the angle B is an angle between the direction indicated by the force transducer 120 and the horizontal parallel surface H2 of the slide 134. The peeling angle (angle C) is defined by the first angle (angle A) and the second angle (angle B), and satisfies the condition of C ° = 180 ° − (A ° + B °) and A ° = B °.

  When the test sled 110 is not lifted by the measuring device 100, the horizontal plane H1 represents a plane orthogonal to the direction of gravity, the second horizontal parallel plane H2 is parallel to H1 and the slide 134, and the force transducer 120 of the mast 190. It is a plane concerning a base.

  According to a preferred embodiment of the present invention, the moving device 130 is a continuously variable device and may be composed of guide screws, couplings, servo actuators and other members or devices capable of adjusting speed. Each of the first angle adjusting device 140 and the second angle adjusting device 150 may be an angle adjusting device including a rotating shaft, a servo actuator and other members, a stepping motor, a manual rotating shaft, or other suitable members.

  According to a preferred embodiment of the present invention, the sample panel 162 may be a standard steel plate. As those skilled in the art are aware, standard steel plates have varying degrees of surface roughness, such as 2 ± 1 micrometer. The degree of surface roughness of the steel plate can affect the physical tack between the adhesive and the tacked article. For this reason, scratched steel plates should be avoided. In addition, the cleanliness of the steel plate surface also affects the physical adhesion between the adhesive and the tacked article. For this reason, before use, the steel plate must be cleaned with a lint-free cleaning paper, selectively with or without solvent.

  FIG. 2 shows a relative angle when the peeling force is measured by the apparatus of the present invention. The tape sample 20 is prepared for laminating a single layer of the adhesive 21 on the support layer 22 and evaluating the performance of the adhesive. The support layer 22 can be made of plastic (eg, PET), paper, cloth, non-woven fabric, or metal film. One end of the tape sample 20 is coupled to the sample panel 162 (such as a steel plate). The sample panel 162 is fixed to the hot / cold plate 160 installed on the test sled 110 with screws. Further, the hot / cold plate 160 is a temperature control device including a heat-resistant wire, a water cooling circulation pipeline, and a temperature sensor element. By controlling the temperature of the hot / cold plate 160, the temperature between the hot / cold plate 160, the sample panel 162, and the tape sample 20 can reach an equilibrium. Accordingly, the temperature among the hot / cold plate 160, the sample panel 162, and the tape sample 20 can be controlled and maintained.

  As shown in the enlarged portion of FIG. 2, one end of the tape sample 20 is coupled to the sample panel 162, and the sample panel 162 is fixed to the test sled 110. The free end of the tape sample 20 is bent and fixed to a clamp (not shown) of the force transducer 120.

As shown in FIG. 2, once the peel angle C is determined, the user determines the angle A between the test thread 110 and the horizontal plane H1 of the slide 134 and the angle B between the indicated direction of the force transducer 120 and the horizontal parallel plane H2 of the slide 134. Can be adjusted. The peel angle (angle C) is defined by a first angle (angle A) and a second angle (angle B),
C ° = 180 ° − (A ° + B °) and A ° = B °
Satisfy the condition of In other words,
A ° = B ° = (180 ° -C °) / 2
In other words. For example, when the peel angle (angle C) is 180 °, A ° = B ° = 0 °, and when the peel angle (angle C) is 90 °, A ° = B ° = 45 °, and the peel angle When (angle C) is 130 °, A ° = B ° = 25 °.

  In one embodiment of the present invention shown in FIG. 2, when the test sled 110 starts moving away from the mast 190, the tape sample 20 is peeled from the sample panel 162, resulting in tension that pulls the force transducer 120. As the test sled 110 moves under a constant velocity (Vb), the peel force on the tape sample 20 continues to peel the adhesive layer 21 from the sample panel 162 (such as a standard steel plate). The peeling angle (angle C) is defined by the first angle (angle A) and the second angle (angle B), and the moving speed (Vb) and peeling speed (Va) can be calculated. As shown in FIG. 3, the first angle (angle A) and the second angle (angle B), the peeling angle (angle C), the moving speed (Vb), and the peeling speed (Va) are given according to a preferred embodiment of the present invention. The peeling rate (Va) can be calculated according to the following formula (2).

  According to an embodiment of the present invention, a separate computer control system 170 may be included in the apparatus 100 to control the peeling angle (angle C) of the tape sample 20. The computer control system 170 can be used for experimental setup, data recording, automatic control and / or result evaluation and calculation, and can be set to record sample temperature, movement and peel speed, and peel angle. The peel force data can be calculated by a computer. All of the above parameters may be adjusted manually.

  The apparatus 100 may further include a protractor (not shown) for the first angle and the second angle. The protractor may display the value of the peel angle (angle C) calculated according to the above formula.

  In one aspect of the present invention, the device 100 for measuring the peeling force of an adhesive may include a light source. The light source may irradiate the peeling position on the test thread 110 with a laser beam, and the tape sample 20 may be peeled according to the light spot. A laser pointer can be used as the light source.

  The method for measuring the peel strength of an adhesive includes a step of measuring the peel strength of a tape sample under various conditions. The first step involves bonding one end of the tape sample 20 to the sample panel 162 (such as a standard steel plate). Thereafter, the sample panel 162 is fixed to a hot / cold plate 160 installed on the test sled 110 with screws. The free end of the tape sample 20 is bent and secured to the clamp of the force transducer 120. The tape sample 20, the sample panel 162, and the hot / cold plate 160 are maintained for several minutes until thermal equilibrium is reached. The second step adjusts the first angle (angle A) between the test thread 110 and the horizontal line H1 to set the peel angle (angle C), and the second angle between the force transducer 120 and the horizontal line H2 ( Adjusting the angle B), of which the first angle (angle A) and the second angle (angle B) satisfy the condition of C ° = 180 ° − (A ° + B °) and A ° = B °. . The third step includes switching on the moving device to move the test sled 110 forward under a constant speed (Vb), after which the peel rate (Va) of the adhesive layer 21 is expressed by the above equation (2). Calculated. The final process includes acquisition of peel adhesion data of the tape sample 20.

  In addition to the third step, a step of setting the temperature of the hot / cold plate 160 after the first step or the second step may be included. Furthermore, the process of detecting the initial peeling point of the tape sample 20 using a light source (laser pointer etc.) after an additional process can be included.

  In order to automatically control the setting, an additional step S70 using a computer control system 170 may be added to the measurement method. The computer control system 170 provides functions for setting the temperature, the moving speed, the peeling speed, the first angle A (angle A), and the second angle (angle B). The peel angle (angle C) can be calculated by the formula C ° = 180 ° − (A ° + B °) and A ° = B °. This measurement method may include additional steps of data recording, result display, and analysis of peel force data in the computer control system 170.

  The measurement method may start from the second step and continue with the first, third, and fourth steps. In another embodiment of the measurement method, the subsequent steps can be appropriately added between any of the second, first and third steps.

  In one aspect of the present invention, the slide and mast are installed on the same seat.

In summary, the present invention provides at least the following advantages.
(1) When the apparatus of the present invention is used, different peeling angles can be set, and the peeling speed can be changed (see FIG. 3). It is also possible to selectively change the temperature of the adhesive by applying a temperature using a hot / cold plate. Accordingly, it is possible to simulate actual working conditions through the apparatus or method for measuring the adhesive peel force according to the present invention.
(2) Based on the result obtained by the apparatus or method for measuring the peel force of the adhesive of the present invention, it becomes possible to develop a PSA product that meets the actual working conditions.
(3) According to the present invention, it is possible to easily measure the peeling force of the adhesive under various conditions including various temperatures, peeling angles, and peeling speeds.

The effectiveness of the present invention was tested in the following example.
(Example)
Materials and Sample Preparation A series of HMPSA's were made with identical proportions of different proportions of solid / liquid tackifying resin (Table 2). These formulations include ExxonMobil Vector 4113 (styrene-isoprene-styrene block copolymer), Yangzi Eastman C-100W (solid hydrogenated hydrocarbon resin), Yangzi Eastman C-8010 (liquid hydrogenated hydrocarbon resin), Karamay KN. -4010 (naphthenic oil) was included. The series of HMPSA included 30% Vector 4113 and 10% KN-4010 as a constant formulation. HMPSA-1 contained 60% solid tackifier. Of these samples, HMPSA-2 contains 45% solid tackifier and 15% liquid tackifier, and HMPSA-3 contains 30% solid tackifier and 30% liquid tackifier. It was. HMPSA was applied on glassine release paper and transferred by a hot melt lab coater onto a 50μ PET film with a uniform thickness of 20-21μ.

Basic Property Test Viscosity of the three HMPSA samples was evaluated at 160, 170, and 180 ° C., respectively, with a viscometer equipped with a Thermosel (ASTM 3236). Pressure sensitive adhesive performance such as loop tack (PSTC-16), holding power (PSTC-107), SAFT (ASTM D-4498-95) was measured based on specific standard test methods. A Rheometrics RDA2 (Strain Controlled Rheometer) was used to determine the rheological properties of the test samples at various temperatures. In this experiment, the test conditions used for viscosity evaluation are as follows. 1) Temperature scan: −20 ° C. to + 100 ° C. 2) Tool or geometry: 8 mm parallel plate, 3) Frequency: 10 rad / sec, 4) Sample thickness: 2.0 to 2.5 mm.

Peel adhesion test equipment Using the apparatus of the present invention, the peel force at various peel angles, peel speeds and temperatures was evaluated. The experimental results are shown in FIG. It is possible to evaluate the individual parameters at a stripping speed of 15 to 300 cm / min, an angle of 0 ° to 180 °, and a temperature of −20 ° C. to 80 ° C. (by hot / cold plate) with the device of the present invention. Indicated by example results.

  In this example, the effect of angle on the performance of the PSA tape was examined. Since the peel rate is more realistically related to the product performance of the adhesive than the thread speed, this evaluation was performed at a constant peel rate, but at a different angle. The peel speed is the actual speed at which the tape is peeled off from the surface where the tape is applied, while the thread speed is just a measurement parameter that does not directly simulate the actual application of the tape product.

  The device of the present invention can be programmed to evaluate the peel force under various conditions. Using equation (2) above, the thread speed and peel angle at a constant thread speed are shown in FIG. FIG. 5 shows that the peel rate is constant when using different peel angles at a constant thread speed.

  As mentioned above, although this invention was demonstrated based on the above-mentioned embodiment, these embodiment does not limit this invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. In view of the foregoing, if changes and modifications of the present invention are included in the scope of claims for utility model registration and their equivalents, the present invention should also include those changes and modifications.

20 Tape sample 22 Support layer 21 Adhesive 100 Measuring device 110 Test thread 120 Force transducer 130 Moving device 132 Slide table 134 Slide 140 First angle adjusting device 150 Second angle adjusting device 160 Hot / cold plate 162 Sample panel 170 Computer control System 190 Mast H1 Horizontal plane H2 Second horizontal parallel plane Va Peeling speed Vb Moving speed

Claims (14)

An adhesive peel force measuring device that can be changed to different peel angles and peel speeds,
A force transducer for measuring the peel force of the tape sample;
A test thread in which the tape sample is installed;
A slide with a slide base on which the test sled is installed;
A moving device for moving the slide table and the test sled;
Wherein the peel angle (angle C) is defined by adjusting a first angle (angle A) and a second angle (angle B), the first angle (angle A) being defined by the test sled and the slide. And the second angle (angle B) is defined by the angle between the force-receiving direction of the force transducer and the horizontal parallel plane of the slide. Force measuring device. The peeling angle (angle C) is
C ° = 180 ° − (A ° + B °) and A ° = B °
The adhesive peel strength measuring device according to claim 1, wherein:   The force transducer and the moving device are configured to hold the peeling angle (angle C), the first angle (angle A), and the second angle (angle B) constant during operation. The adhesive peel force measuring device according to claim 2.   The adhesive peeling force measuring device according to claim 1, further comprising a light source that irradiates a laser beam at a peeling position on the test thread.   The apparatus of claim 1, wherein the test thread further includes a hot / cold plate capable of adjusting temperature.   The adhesive peel force measuring device according to claim 1, further comprising a first angle adjusting device for adjusting the first angle and a second angle adjusting device for adjusting the second angle. .   The adhesive peel force measuring device according to claim 4, wherein the peel angle (angle C) is defined by an angle between the light beam at the peel position and the test thread.   The adhesive peel force measuring device according to claim 1, further comprising a pair of protractors, wherein each protractor is disposed to measure the first angle and the second angle.   2. The tape sample according to claim 1, wherein one end of the tape sample is firmly connected to a sample panel fixed on the test sled, and the other end of the tape sample is bent and fixed to the force transducer by a clamp. An apparatus for measuring the peel strength of the adhesive described in 1.   10. The adhesive peel force measuring device according to claim 9, wherein the sample panel is composed of a standard steel plate.   The adhesive peeling force measuring device according to claim 2, wherein the moving device is configured to drive the test sled at a constant moving speed (Vb) during operation. The peeling force of the adhesive according to claim 11, wherein the tape sample is peeled at a peeling speed (Va) with respect to the moving speed (Vb) during the operation and satisfies a condition represented by the following formula. measuring device.
  The adhesive peel force measuring device according to claim 12, wherein the first angle is equal to the second angle. A computer control system for test setting and analysis used in combination with the adhesive peel force measuring device according to claim 1, wherein the computer control system comprises:
A control module for setting the temperature of the sample, the moving speed, the peeling speed, the first angle, the second angle, and the peeling angle;
A recording module for recording the setting parameters of the control module;
An analysis module for analyzing peel force data;
A display module for displaying an analysis result of the analysis module;
A computer control system comprising: