JPH036443A - Measuring apparatus of exfoliation strength of film - Google Patents

Abstract

PURPOSE:To set a measuring angle arbitrarily by providing a rotating arm which can be fixed at a desired angle, and a sample mounting plate which has an intermediate-part rotation pivot at the same height as the center of rotation of the arm and of which a rotational angle can be adjusted freely. CONSTITUTION:A sample mounting plate 10 and a rotating arm 4 are set at an angle of 45 degrees to a base surface 2 respectively, and a line connecting a load measurer 5 and a chuck 7 fitted to the fore end thereof is set at an angle of 90 degrees (position A) to the top surface of the plate 10. The chuck 7 is fixed and connected to the end part of a surface film F of a sample S. An exfoliation start point Q0 of the sample S is set so that a pivot 12 of the plate 10 to be positioned at the center P of the arm 4 when an exfoliation point Q reaches a position on the pivot 12. As a moving stage 13 is driven in the direction of an arrow from the point Q0, the point Q shifts on the sample S and an exfoliation angle at the point Q is always maintained to be 90 degrees. When the pivot 12 reaches a point P, the stage 13 is stopped, the arm 4 is rotated to make the measurer 5 horizontal (position B), and the stage 13 is driven in the direction of an arrow. Then the plate 10 is set to the horizontal and thus an exfoliation test for 180 degrees can be performed.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to coatings on materials (hereinafter referred to as objects to be measured or samples) formed by forming coatings on the surfaces of materials such as plated bodies, adhesive bodies, or bonded bodies. This invention relates to a peel strength measuring test device that measures the adhesion of materials.

(Conventional technology and problems) Peel test methods have been used to determine the adhesion between coatings and materials, such as plating adhesion tests, adhesive peel strength tests, and printed wiring peel strength tests. .

In the peel test method, in order to obtain good measurement accuracy, it is necessary to maintain the peel angle, peel speed, etc. of the object to be measured constant without being affected by the load. It was common practice to use a universal tensile testing device instead.

The peel angle in the peel test method is usually 90 degrees and 180 degrees, but when performing these tests with a universal tensile tester, the peel angle is 90 degrees because the tensile direction of the universal tensile tester cannot be changed. Since the angle at which the sample is attached and fixed with respect to the tensile direction is different between the peel angle of 180 degrees and the peel angle of 180 degrees, separate sample fixing devices are required for each. Additionally, for this reason, it is difficult to perform both 90-degree and 180-degree peel tests consecutively at different locations on the same sample. This becomes a very time-consuming task.

Furthermore, when performing a 90 degree peel test using a universal tensile testing machine, the peeled end of the film is held at 90 degrees to the sample surface and pulled at a constant speed in the vertical direction, and the sample is pulled at the same speed as this speed. The table must be moved horizontally. Adding a device for performing this operation to a universal tensile testing machine would make the entire device unnecessarily large and expensive.

In order to solve the above-mentioned drawbacks, the present inventor has provided a rotating board that can change the angle with respect to the base surface on one side of the base for horizontally fixing a load measuring instrument equipped with a sample chuck mechanism. A movable member is provided which is pivotally mounted and moves relative to the rotary substrate, and a coating member is provided at the tip of the movable member that faces the chuck mechanism of the load measuring device and has a sample mount pivotably mounted so as to be able to change the angle. Peel strength test device (Utility Model No. 62-1767)
Publication No. 45) was proposed.

With this device, it is necessary to change the angle of the rotary substrate and the angle of the mount at the same time, and it is difficult to change both angles while measuring the same sample.

Furthermore, a work space was required around the equipment.

In order to solve this problem, the present inventor installed an upright wall vertically on the measurement base, provided an arcuate rail or groove on one side of the upright wall to serve as a rotation guide track, and provided A load measuring device equipped with a chuck device for the sample film is mounted so that the position can be changed arbitrarily along the rotational trajectory, and furthermore, the load measuring device is installed on the base so that the angle can be set at an arbitrary angle with respect to the load measuring device. By providing a sample mounting plate with a fixed angle and moving this mounting plate along the base surface and passing through the center point of the circular arc of the rotating orbit, the sample can be rotated at 90 degrees and 180 degrees without removing it from the sample mounting plate. We proposed a device that can measure peel strength at any different angles, such as degrees, using the same sample. (Public Application No. 129293) (Objective) The present invention further improves the above-mentioned device, makes it easy to set any measurement angle, and makes it even easier to change the measurement angle during measurement, thereby improving the usability of the device. It is designed to be smaller.

(Configuration) The measurement principle by the measuring device of the present invention is as shown in Fig. 1.
The measuring instrument (5) on the rotating arm, which has its center of rotation at point P, can freely rotate to the left with respect to the vertical axis
10) is freely rotatable to the right, and the center of the rotation axis of the intermediate portion passes through point P and moves horizontally.
When obtaining the measurement angle θ, θ−α×β(Itanshiα−
β) and start peeling by horizontal movement.

When the separation point Q on the sample S coincides with the point P, a second desired measurement angle S can be obtained by changing α and β.

In this case, if the midpoint SO of the sample S is made to coincide with the point P, it is easy to set the measurement length 11=12.

If α-β-45°, a 90 degree peel test can be performed, and Q=P
By setting α-β-90' in , a 180 degree peel test can be performed.

The configuration of the device of the present invention includes a rotating arm that is supported on a measurement base so that the center of rotation is at a predetermined height and can be fixed at a desired angle, and a load measuring device with a chuck that is fixed on the rotating arm. and a sample mounting plate having an adjustable rotation angle and having an intermediate rotation axis at the same height as the rotation center of the rotation arm, and either means for supporting the mounting plate or the rotation arm. and a driving means for driving the moving means. be.

Further, in the present invention, the rotating means for the sample mounting plate and the rotating arm can be either manual or electric, but if the rotating means is electric, it is easy to change the measuring angle continuously even during measurement, for example.

Below, an embodiment of an apparatus in which a rotating arm is fixed on a base and a sample mounting plate is moved by manually setting a rotating angle will be described.

(Example) In the figure, (1) is the base of the measuring device, (2) is the base surface,
(3) A rotating arm that is a support fixed on the base (4)
supports the rotation axis (4A). Center of rotation axis (P
) is placed at a constant height above the table.

(5) is a load measuring device having a built-in load cell, etc., and is fixed to the tip of the rotating arm.

Reference numeral (6) denotes a tension arm, which is located on a line connecting the measuring instrument and the point (P), and has a sample coating chuck device (7) attached to its tip.

Reference numeral (10) denotes a sample mounting plate, which is disposed so as to face the load measuring device (5), and whose intermediate pivot (12) is supported by a support bracket (11).

(12a) is a tightening means which serves as an angle fixing means for the mounting plate to fix the mounting plate at a predetermined measurement angle.

(13) is a moving platform with sliding guide rails (8) and (9).
It is driven by the rotation of a fixed pinion (15) that is provided astride the rack and meshes with the rack (14) on the lower surface of the rack, and constitutes a means for moving the mounting base.

(16) is a drive rack, (17) is a linear head, (
18) It is a drive motor and serves as a driving means.

Figure 2 shows the case of 90 degree peeling, and the sample mounting table (1
0) is fixed at an angle of 45 degrees counterclockwise with respect to the base surface, and the rotating arm is set at an angle of 45 degrees clockwise, and the load measuring device (5) and the chuck ( 7> is set so that it forms a 90 degree angle to the top surface of the mounting plate (position A).

The chuck (7) fixedly connects the ends of the surface coating (F) of the object (S) to be measured using a conventional method.

In FIG. 3, the peeling start point Qo of the sample is determined when the peeling point Q reaches the position on the mounting plate axis (12).
12) is set so that it is located at the center P of the rotating arm.

As the moving table (13) is driven in the arrow direction from this starting point Qo, the peeling point Q moves over the sample.

During this time, the peeling angle at the peeling point is always automatically maintained at 90 degrees, and the load measuring device accurately and stably measures the load during peeling at 90 degrees.

When the pivot (12) of the mounting plate (10) reaches point P, stop the moving table and rotate the rotating arm to move the load measuring device (5) to the position shown in Figure 4, that is, horizontally. Then, when the moving stage is driven in the direction of the arrow, the separation point is below point P, so the sample mounting stage (10) becomes horizontal to the base surface (2) without any modification. In this way, peeling tests at 90 degrees and 180 degrees can be performed successively by simply rotating the rotating arm. (See Figure 4) In other words, in the present invention, when the coating peeling point Q on the sample reaches the intermediate pivot (12) of the mounting plate, peeling is started so that it is located exactly at the center point P of the rotating arm. Since the point Qo is set, the set angle of the mounting plate (10) and the position of the load measuring device (5) can be changed at this position.

The angle of the mounting plate may be set using, for example, a stopper (19).

In the present invention, the position of the load measuring device, that is, the rotation angle of the rotation arm can be changed continuously and very smoothly, so contrary to the above, it is also possible to start with a 180 degree test and then perform a 90 degree peel test. be.

In addition, it is of course possible to perform a 90 degree test and a 180 degree test separately as in the conventional apparatus, and a peel test at any angle such as 30 degrees or 45 degrees can be performed very easily.

In the present invention, the mounting plate (10) is constructed as shown in FIG. 7, and the SO can be easily set by the long slide groove (20).

Note that the horizontal movement amount or movement speed of the mounting plate can be easily calculated from a pulse generator or a tachometer (not shown) attached to the drive motor.

(Effects) According to the present invention, the peel strength of the coating can be precisely measured at any angle, and the set angle can be changed freely and easily when the peel point Q is at the P point, so the same sample can be peeled at multiple angles. This method has the advantage that tests can be performed continuously and a series of measurement tasks can be performed in a short period of time.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the principle of the device of the present invention, Figure 2 is a front view of the device of the present invention in the case of a 90 degree peel test, Figure 3 is an enlarged sectional view showing the movement process of the sample mounting plate, and Figure 4 is a front view of the 180 degree test, Figure 5 is a right side view of the device in Figure 2, and Figure 6 is a right side view of the device in Figure 2.
The figure is a plan view of the apparatus, and FIG. 7 is a sectional view of the sample mounting plate. (4) is a rotating arm, P is a rotation center, (5) is a load measuring device, (10) is a sample mounting plate, (10a) is a sample middle part,
12〉 is the axis, and (13) is the moving table.

Claims (2)

[Claims] (1) A rotating arm supported on a measurement base with its center of rotation at a predetermined height and capable of fixing a desired angle;
A load measuring device with a chuck fixed on the rotary arm, a sample mounting plate having an intermediate rotation axis at the same height as the rotation center of the rotary arm and having an adjustable rotation angle, and the mounting plate. or a moving means for moving either one of the rotating arm along the base surface and such that the intermediate rotation axis passes through a rotation center position of the rotating arm; A coating peel strength measuring device comprising a drive means for driving the means. (2) The coating peel strength measuring device according to the above item 1, wherein the sample mounting plate is fixed to the intermediate portion rotation axis such that the position thereof can be adjusted in the longitudinal direction of the plate.