JPH0192639A - Measuring instrument for adhesive force - Google Patents

Abstract

PURPOSE:To measure the adhesive force for peeling at an optional peeling angle by sticking a sample on an adhered body, clamping its end with a sample drawing metal fitting and drawing the sample from the adhered body and moving the adhered body in a specific direction and peeling the sample off the adhered body. CONSTITUTION:An adhesive tape T as the sample is stuck on the surface of the adhered body S so that a reference line 0 is at a peeling start point. The adhesive tape drawing metal fitting 8 is connected to the end of the adhesive tape T on the side of the reference line 0. A Y-axial moving table 6 is set so that its front end is positioned on an initial positioning line A. A speed change controller 15 sets the speed change ratio of a change gear 14 corresponding to a peeling angle theta. A speed controller 16 drives a motor 10 to make an adjustment to a set speed. An X-axial moving table 5 and the Y-axial moving table 6 are moved by the motor 10 at constant speeds respectively and the tape T is peeled off the adhered body S while the peeling angle theta is maintained. The tensile force during this driving is detected by a load cell 7 as a signal.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an apparatus for measuring the adhesive strength of adhesive labels, adhesive tapes, other adhesive papers, etc.

Conventional technologyTo measure the adhesive strength of labels, adhesive tapes, and other adhesive papers, adhere the adhesive sheet of the sample to a fixed reference surface, then pull it at a fixed angle to remove the tensile force. A method of measuring force (peel force) is used. However, the peeling force depends on many factors such as (i) the angle between the direction in which the film is pulled and the surface of the adherend, that is, the peel angle, (i) the elastic modulus of the adhesive, and (ii) the bending rigidity of the film, i.e., the bending elastic modulus, and the bending yield stress. and each of these factors varies depending on the peel angle. Therefore, in order to accurately understand the M ability of a film, etc., it is necessary to know the relationship between # separation angle and peeling force. However, although there are conventional devices that measure peel adhesion at a fixed peel angle of 180 degrees or 90 degrees, it is easy to set and maintain an arbitrary peel angle and measure the peel adhesive force at any peel angle. There is no device to measure (peel force).

C1 Problems to be Solved by the Invention It is an object of the present invention to provide an adhesive force measuring device capable of measuring peel adhesive force for any arbitrary peel angle as described above.

29 Means for Solving Problems In an apparatus for measuring the adhesive strength, which is the peel resistance of adhesive tapes, etc., an X-axis guide, a Y-axis guide perpendicular to the X-axis guide,
An adherend for attaching a sample that can slide along an X-axis guide, a Y-axis moving table that can slide along a Y-axis guide, an adherend driving device and a Y-axis sliding table driving device that are independent of each other, comprising means for arbitrarily setting the ratio of the moving speeds of the adherend and the Y-axis moving table by the two drive devices, and a sample tensioning fitting pivotally attached to the Y-axis moving table via a tensile force detection means, A sample was attached to the adherend, and the end thereof was grasped with the sample tensioning fitting and pulled from the adherend, and the adherend was moved in the X direction to peel off the sample from the adherend. .

E1 Effect To measure the adhesive strength of labels, adhesive tapes, other adhesive papers, etc. against the peeling angle, maintain a constant state so that the peeling angle does not change even if the adhesive tape etc. is peeled off. There is a need.

A feature of the present invention is that as a sample tape tensioning mechanism, a drive device in the X-axis (horizontal) direction and a drive device in the Y-axis (vertical) direction are provided separately, and each drive speed can be set arbitrarily. be. The peeling operation when the peeling angle θ is an obtuse angle will be explained with reference to FIG. The initial state of the sample tape is shown by a solid line, and the state of the sample tape after a unit time is shown by a two-dot chain line. P
o is the first peeling point, P is the peeling point after unit time in the driving state, P2 is the position of the point on the sample tape at the first peeling point Po after the movement, and P3 is the position at the first peeling point PO. When the position of the point on the adherend after movement, the initial position of the Y-axis moving table 6 is y, and the position after unit time is y', at this time,
The peeling directions Po5' and Pt5'' of the sample tape must be parallel. If the sample tape is moved in this state, the peeling length of the sample tape will be PI P2 = PIPa,
The moving distance of the adherend is PoP3, and the moving distance of the Y-axis moving table is yy'. Therefore, if the peeling speed (peeling length within unit time, e.g.; PIP2) is ■, and the peeling angle is θ, then the moving distance of the adherend (X-axis driving speed) V-=P
o P3 =Po P1+P1' P3 =V (1-
cose), the moving distance of the Y-axis moving table 6 (Y-axis driving speed) Vy = Vs in θ, and if the sample tape is peeled by setting the X-axis and Y-axis driving speeds as described above, the peeling period is During the test, the sample tape is peeled off while maintaining the peeling speed at V and the peeling angle at θ. FIG. 3 shows the peeling state when the peeling angle is acute.

The symbols are the same as in FIG. The above relationship is VX=V(c
ose-1), holds true when Vy=Vsinf9.

As described above, according to the present invention, there is no variation in the peel angle due to peeling off of the adhesive tape, and the peel angle can be freely set.

Embodiment FIG. 2 shows an embodiment of the present invention. In Figure 2, S
is the adherend and T is the sample tape adhered thereon. The adherend S is specified in the Japanese Industrial Standards (JISZ0237) in the case of standard adhesive strength measurement, but any object surface may be used in the case of on-site comparative measurement. 1 is X
X-axis drive feed gear 3 with bearings B provided at both ends of the shaft guide
is rotatably held, and a scale line 0'' for initial positioning of the adherend S according to the peeling angle is engraved on the surface.

Reference numeral 5 denotes an X-axis moving table, which is screwed onto the X-axis drive feed screw 3 and moves in the X direction by rotation of the X-axis drive feed screw 3. The adherend S is fixed on an X-axis moving table 5. 2 is a Y-axis guide, which rotatably holds the Y-axis drive feed screw 4 with bearings B provided at both ends, and an initial positioning line A on the side that positions the Y-axis moving table 6 to the initial position.
The lower part is gate-shaped so that the adherend S can pass through. 6 is the Y-axis moving table and the Y-axis drive feed screw 4
It is screwed onto the Y-axis drive screw 4 and moves in the X direction by rotation of the Y-axis drive feed screw 4. Reference numeral 7 denotes a load cell (tensile force detection means) which is swingably held on the Y-axis moving table 6. Reference numeral 8 denotes a tension fitting for holding the sample tape T, which is connected to the load cell 7. 10 is a drive motor, and 11 is a drive shaft connected to the rotating shaft of the drive motor 10. Reference numeral 12 denotes a rotation direction changer, which transmits the rotation of the drive shaft 11 to the rotation of the Y-axis drive feed gear 4. Drive motor 10 and drive shaft 11
A Y-axis radial table drive device is constituted by the rotation direction changer 12 and the Y-axis drive feed screw 4. A timing belt 13 transmits the rotation of the drive shaft 11 to the X-axis drive feed screw 3 via a continuously variable transmission 14. A drive motor 10, a drive shaft 11, a timing belt 13, a continuously variable transmission 14, and an X-axis drive feed screw 3 constitute an adherend drive device. The continuously variable transmission 14 is a transmission that changes the rotation speed of the X-axis drive feed screw 3 to an arbitrary ratio to the rotation speed of the Y-axis drive feed screw 4, and the rotation speed with the Y-axis drive feed screw 4 is variable. In the case of an obtuse angle, the ratio is Y-axis rotation speed: X-axis rotation speed = sin θ / (1-cos θ) (θ; peeling angle), and in the case of an acute angle, Y-axis rotation speed / X-axis rotation speed - 5 in θ / (
cos θ-1) using the speed change controller 15. The continuously variable transmission 14 and the speed change controller 15 constitute means for arbitrarily setting the ratio of moving speeds.

The use and operation of the device described above will now be described. Place the device of the invention on a suitable substrate surface. Make the board surface horizontal. When performing measurements in accordance with JIS regulations, the material and surface treatment of the adherend S must be in accordance with JIS regulations, but as mentioned above, in the case of on-site comparative measurements, the adherend S must be selected appropriately. You may do so. The reference line O of the adherend S is aligned with the scale line O° marked on the X-axis guide 1 according to the peeling angle. The adhesive tape T of the test sample is attached to the surface of the adherend S so that the reference line 0 becomes the peeling start point. An adhesive tape tensioning fitting 8 is connected to the end of the adhesive tape T on the reference line O side. The Y-axis moving table 6 is set so that its tip is located on the initial positioning line A. The speed controller 15 sets the speed ratio of the transmission 14 to correspond to the separation angle θ. The drive motor 10 is driven by a speed controller 16 and adjusted to a set speed. By driving the drive motor 10 to move the X-axis moving table 5 and the Y-axis moving table 6 at a constant speed, the sample tape T is peeled from the adherend S while maintaining the peeling angle θ. The tension during this driving is detected by the load cell 7 as an electrical signal. The detected electrical signals are stored and calculated by a computer (not shown), and the measurement results are displayed on a display device (not shown).

1. Effects According to the present invention, since the peeling operation can be performed while maintaining the peeling angle θ, it is now possible to measure the adhesive force for any peeling angle, thereby expanding the measurement capability.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating the principle of an embodiment of the present invention, FIG. 2 is a configuration diagram of the above embodiment, and FIG. 3 is a diagram illustrating the principle in the case where the separation angle is an acute angle. A...Initial positioning line, B...Bearing, S...Substrate, T...Sample tape, 0...Reference line, 0'...
Graduation line, 1...X-axis guide, 2...Y-axis guide, 3
...X-axis drive feed screw, 4...Y-axis drive feed screw, 5...X-axis moving table, 6... Y-axis moving table, 7...
- Load cell, 8... Tension fitting, 10... Drive motor, 11... Drive shaft, 12... Rotation direction changer, 13... Timing belt, 14... Continuously variable transmission, 15... Speed controller, 16... Speed controller.

Claims (1)

[Claims] An X-axis guide, a Y-axis guide perpendicular to the X-axis guide, a sample attachment adherend that can slide along the X-axis guide, a Y-axis moving table that can slide along the Y-axis guide, and an adherend that is independent of each other. a body driving device, a Y-axis moving table driving device, a means for arbitrarily setting a ratio of the moving speed of the adherend and the Y-axis moving table by both said driving devices, and a tensile force detecting means for said Y-axis moving table. The sample is attached to the adherend, and the end of the sample is grasped by the sample tensioning fitting and pulled from the adherend while the adherend is moved in the X direction. An adhesive force measuring device characterized in that the sample is peeled off from the adherend.