JP2002116137A - Peeling test device and peeling test method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a peeling test device and method for measuring peeling strength between peeling paper and peeling material. SOLUTION: A test piece 20 including a peeling paper and a peeling materials is fixed onto a test stage 1 and a roller 10 is rolled on the test piece in such a manner that the roller 10 winds only the peeling paper 2. The force required to cause rolling of the roller is measured as peeling strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a peel test apparatus and a peel test method for measuring peel strength, and more particularly to a peel test apparatus and a peel test method for measuring the peel strength of a transfer film.

[0002]

2. Description of the Related Art FIG. 3 shows a transfer film 20 used for transferring characters and figures on the surface of an OA device or the like.
(A) is a top view of the transfer film 20, and (b) is a cross-sectional view in the AA direction of (a). Transfer film 20
For example, a tetron sheet 21 serves as a base material, and a release layer 22 such as a silicone compound is applied thereon. On the release layer 22, a transparent film (release paper) 23
Is provided. On the film 23, a printing layer 24 is formed. The printing layer 24 has a shape such as a character or a figure, and is printed so as to be turned over when viewed from above. For example, in FIG. 3A, the letter “R” is printed upside down. Further, a transparent hot-melt adhesive layer 25 is formed so as to cover the print layer 24.

The transfer film 20 is heated, for example, on an OA device or the like so that the adhesive layer 25 is in contact with the OA device or the like, and adheres the adhesive layer 25 to the surface of the OA device or the like. Subsequently, the tetron sheet 21 and the release layer 22 are removed by separating the film 23 and the release layer 22.
Thereby, the printing layer 24 covered with the transparent film 23
Is transferred to the surface of an OA device or the like. For example, the character “R” is displayed on the transfer film 20 in FIG.

As described above, in order to transfer characters and the like formed on the printing layer 24 to the surface of an OA device or the like with good reproducibility, the peeling strength between the film 23 and the peeling layer 22 must be a predetermined value. It needs to be almost constant. Particularly, in order to perform the transfer process as a part of the mass production process, the transfer film 2 is required.
Even when the lot of 0 changes, the peel strength is required to be substantially constant. Therefore, the producer and / or user of the transfer film 20 need to check that the transfer film 20 has a peel strength that meets the standards.

FIG. 4 shows a conventional film peel test apparatus used for measuring such peel strength. The film peeling test apparatus indicated as a whole by 30 comprises a film table 31 and a spring scale 32. In the measurement of the peel strength using the film peel test apparatus 30, first, only the peel layer 22 and the film 23 of the transfer film 20 are prepared. next,
The transfer film 20 is placed on the film base 31 having a flat upper surface so that the film 23 contacts the film base 31. The film 23 is fixed on the film table 31 with an adhesive or the like. Next, a cellophane tape 34 is affixed to the release layer 20, and once connected to the spring scale 32.
Finally, the spring scale 32 is lifted in the direction perpendicular to the surface of the film table 31 (in the direction of arrow 33), and the film 2
The peeling layer 22 is peeled off from No. 3 and the measured value of the spring gauge 32 at that time is defined as the peeling strength. During the measurement, the cellophane tape 3
4 and the peeling layer 22 are not peeled off.

[0006]

However, in the measuring method using the film peeling test apparatus 30, the measurement results vary depending on the pulling direction and the pulling speed of the spring scale 32. There was a difference in the measured values between the user and the user. In order to automate the film transfer process, the peel strength must be substantially constant. However, the conventional measurement method has a large variation in the measurement results, and it is impossible to accurately inspect the peel strength of the transfer film 20. Was.

Accordingly, an object of the present invention is to provide a peel test apparatus and a peel test method for accurately and reproducibly measuring the peel strength of a transfer film.

[0008]

SUMMARY OF THE INVENTION The present invention is a peel test apparatus for measuring the peel strength between a release paper and a release material,
A test table having a substantially flat surface and a test piece on which a release paper and a sheet coated with a release material are bonded via the release material, and a test piece placed on the surface; A roller that is mounted on and rolls on the surface while rotating around a rotation axis;
A pulling means for pulling the rotation axis in a direction substantially perpendicular to the rotation axis and substantially parallel to the surface of the test table and rolling the roller on the test table, and measuring a pulling force applied to the pulling means And fixing the sheet of the test piece on the surface of the test table, and fixing one end of the release paper to the roller placed on the test piece, A peeling test apparatus characterized in that the roller is rolled so as to wind up the paper, and the release paper is peeled from the sheet coated with the release material, and the tensile force at that time is measured by the measuring means. . By using such a peel test apparatus, the peel strength of a test piece can be accurately and easily measured. Further, in the conventional measuring device, the measured value that has been varied depending on the measurement environment can be obtained with good reproducibility.

Further, according to the present invention, the pulling means is a wire, the measuring means is a strain gauge provided on a plate connected to one end of the wire, and the plate is moved. The peel test apparatus is characterized in that the wire is pulled to rotate the roller, and the tensile force at that time is measured by the strain gauge. By using the strain gauge and the wire, the peel strength can be automatically measured, and the measurement accuracy and reproducibility can be further improved.

Further, the apparatus may include a display means for displaying the measured value measured by the measuring means. By including such a visual display, the measurement efficiency can be increased.

The test piece comprises a sheet coated with a release material, a substantially transparent release paper laminated on the sheet via the release material, a print layer printed on the release paper, An adhesive layer provided on the release paper to cover the layer,
A transfer film may be used in which the test piece is adhered to a predetermined object with the adhesive layer, and then the sheet coated with the release material is released from the release paper.

The present invention also relates to a peeling test method for measuring the peel strength between a release paper and a release material, wherein at least the release paper and a sheet coated with the release material are interposed through the release material. Preparing a test piece adhered by bonding, placing the test piece on a substantially flat surface so that the sheet is fixed on the flat surface, and placing a roller on the test piece And
Fixing one end of the release paper to the roller, and pulling a rotation axis of the roller in a direction substantially perpendicular to the rotation axis and in a direction substantially parallel to the plane, and the release paper is peeled from the sheet. Rolling the roller so that it is wound on the roller;
A measuring step of measuring a force pulling the rotating shaft when the roller rolls. By using such a peel test method, the peel strength of the test piece can be measured accurately and easily, and in particular, measurement with high reproducibility is possible.

Further, in the present invention, the measuring step may include pulling a wire connected to the rotating shaft to roll the roller,
This is also a peeling test method in which the wire rod pulls the roller with a strain gauge.

Further, the method may include a step of displaying the measured value measured in the measuring step.

The test piece comprises a sheet coated with a release material, a substantially transparent release paper laminated on the sheet via the release material, a printing layer printed on the release paper, An adhesive layer provided on the release paper to cover the layer,
A transfer film may be used in which the test piece is adhered to a predetermined object with the adhesive layer, and then the sheet coated with the release material is released from the release paper.

[0016]

FIG. 1 is a schematic view of a film peeling test apparatus according to an embodiment of the present invention, wherein (a) shows a top view and (b) shows a side view. The film peel test apparatus, generally designated 100, includes a test bench 1 having a flat surface. On the test stand 1, a substantially straight rail 2
Is provided. A slide 3 that slides on the rail 2 while being engaged with the rail 2 is mounted on the rail 2. A reversible motor 5 is fixed on the test stand 1. It is preferable that the reversible motor 5 has a deceleration function that rotates at, for example, a rotation speed of 1000 rpm and gradually reduces the rotation before the rotation stops. A reel 6 is attached to a rotating shaft of the reversible motor 5. The circumference of the reel 6 is arranged so as to coincide with the longitudinal direction of the rail 2, and the wire 2 attached to the slider 3 is wound by the reel 6.

On the other hand, the slider 3 is provided with a plate sensor 7 substantially perpendicular to the longitudinal direction of the rail 2.
As the plate-like sensor 7, for example, a plate-like body and a strain gauge provided thereon are used. At the tip of the plate-shaped sensor 7, a wire 8 such as a tako thread is connected, for example. A frame 9 that holds the roll 10 so as to rotate is connected to the opposite end of the wire 8. When the wire 8 is pulled, the wire 8 is substantially parallel to the surface of the test table 1.

Further, on the test table 1, a digital strain meter 11 is provided. The digital strain meter 11 includes a plate-shaped sensor 7 and, for example, a conductive wire (not shown).
The measurement signal generated by the plate sensor 7 is sent to the digital strain meter 11 and the measured value is displayed.

In the peeling test apparatus 100 having such a structure, the reversible motor 5 is driven to move the wire 4 to the reel 6.
The slider 3 slides on the rail 2. Along with the movement of the slider 3, the wire 8 attached to the tip of the plate-like sensor 7 pulls the frame 9. As a result, the roll 10 rolls while rotating substantially parallel to the longitudinal direction of the rail 2.

Next, a method for measuring the peel strength of a transfer film using the peel test apparatus 100 will be described. First, in order to perform a peel test, the peel test apparatus 100
It is set as follows. Further, a test piece of the transfer film 20 is fixed at a position indicated by a dotted line in FIG. Here, for simplicity, the transfer film 2
Reference numeral 0 denotes a tetron sheet 21, a release material 22 applied on the tetron sheet 21, and a film 23 laminated via the release material 22.

FIG. 2 is a side view of the transfer film 20 arranged on the peeling test apparatus 100. Transfer film 20
As shown in FIG. 2A, first, on the test table 1,
The tetron sheet 21 is placed. Tetron sheet 21
Is fixed on the surface of the test stand 1 by, for example, an adhesive. Next, the substantially cylindrical roller 10 is placed on the transfer film 20.
Is placed. One end of the film 23 is fixed to the surface of the roller 10, and when the roller 10 rolls in the direction of the arrow 15, the film 23 is wound around the roller 10 and wound up. In FIGS. 2A and 2B,
The wire 8 and the frame 9 are omitted, and only the roller 10 is shown.

Next, the reversible motor 5 is driven to wind the wire 4 around the reel 6. Thereby, the slider 3 connected to the wire 4 moves on the rail 2. When the slider 3 moves, the plate sensor 7 provided on the slider 3 pulls the wire 8. Wire rod 8
Pulls the frame 9 which is the bearing of the rotating shaft of the roller 10, so that the roller 10 finally rolls in the direction of the arrow 15. The speed at which the slider 3 moves on the race 2 is:
It is preferably about 5 to 15 mm / sec.

FIG. 2B is a side view of the roller 10 in the course of rolling in the direction of the arrow 15. As shown in the figure, as the roller 10 rotates, the film 23 peels from one end of the test piece 20 from the release material 22 applied on the tetron sheet 21. The peeled film 23
It is wound around the roller 10 so as to wind around the surface of the roller 10.

When the roller 10 is rolling as described above, the plate sensor bends as shown by reference numeral 7 'in FIG. 1A, and the amount of the bend is detected by, for example, a strain gauge. The pulling force of pulling the roller 10 can be measured.

The deflection amount is sent from the plate sensor 7 to the digital strain meter 11 as a measurement signal, and the value is displayed. In the digital strain meter 11,
For example, the measured value is displayed as a digital value in grams.

The measured values indicate that the roller 10
Although it is almost constant in the process of rolling while winding 3, an average may be obtained from a plurality of measured values and the peel strength may be used.

In the present embodiment, the transfer film 2
Although the measurement of the peel strength of 0 has been described as an example, the present invention can also be used for measuring the peel strength of another test piece including a release paper and a release material.

[0028]

As is clear from the above description, the use of the peel test apparatus and the peel test method according to the present invention makes it possible to measure the peel strength accurately and with good reproducibility.

In particular, since the value of the peel strength can be quantified,
Quality control of test pieces can be strictly performed.

[Brief description of the drawings]

FIG. 1 is a schematic view of a peel strength measuring apparatus according to the present invention.

FIG. 2 is an enlarged view of a part of the peel strength measuring device according to the present invention.

FIG. 3 is a transfer film.

FIG. 4 is a schematic view of a conventional peel strength measuring device.

[Explanation of symbols]

1 ... test table, 2 ... rail, 3 ... slider, 4 ... wire, 5 ... reversible motor, 6 ... reel, 7,
7 '... plate sensor, 8 ... wire, 9 ... frame, 1
0 ... roller, 11 ... digital strain meter, 10
0 ... peeling test equipment.

Claims (8)

[Claims] 1. A peeling test apparatus for measuring a peel strength between a release paper and a release material, wherein the release paper and the sheet coated with the release material have a substantially flat surface. A test table on which the test piece adhered via the test table is mounted on the surface; a roller mounted on the surface of the test table and rolling on the surface while rotating around a rotation axis; Pulling means for pulling the rotating shaft in a direction substantially perpendicular to the surface of the test table and substantially parallel to the surface of the test table, and rolling the roller on the test table; and measuring means for measuring the tensile force applied to the pull means. Fixing the sheet of the test piece on the surface of the test table, fixing one end of the release paper to the roller placed on the test piece, and winding the release paper around the roller. Rolling the roller to take off the release paper from the sheet coated with the release material Peeled, peeling test apparatus characterized by measuring at the measuring means the tensile force at that time. 2. The method according to claim 1, wherein the pulling means is a wire, and the measuring means is a strain gauge provided on a plate connected to one end of the wire, and the wire is moved by moving the plate. The roller is rotated by pulling, and the pulling force at that time is measured by the strain gauge.
A peeling test apparatus according to item 1. 3. The peeling test apparatus according to claim 1, further comprising display means for displaying the measured value measured by said measuring means. 4. A test sheet comprising: a sheet coated with a release material; a substantially transparent release paper laminated on the sheet via the release material; and a print layer printed on the release paper. An adhesive layer provided on the release paper so as to cover the printing layer, and after adhering the test piece to a predetermined target with the adhesive layer, the sheet coated with the release material is used as the release paper. The peeling test apparatus according to any one of claims 1 to 3, wherein the peeling test apparatus is a transfer film that peels off from a transfer film. 5. A peeling test method for measuring a peeling strength between a release paper and a release material, wherein at least the release paper and the sheet coated with the release material are:
A step of preparing a test piece bonded via the release material; a step of placing the test piece on a substantially flat surface so that the sheet is fixed on the flat surface; Placing a roller on the roller and fixing one end of the release paper to the roller; and pulling a rotation axis of the roller in a direction substantially perpendicular to the rotation axis and in a direction substantially parallel to the plane, thereby removing the release paper. A peeling test, comprising: a step of rolling the roller so that the roller is peeled off from the sheet and wound on the roller; and a measuring step of measuring a pulling force of the rotating shaft when the roller rolls. Method. 6. The method according to claim 5, wherein the measuring step is a step of pulling a wire connected to the rotating shaft to roll the roller, and measuring a pulling force of the wire by the strain gauge with a strain gauge. Peeling test method described in 1. 7. The peeling test method according to claim 5, further comprising a step of displaying a measured value measured in the measuring step. 8. The test piece, a sheet to which a release material is applied, a substantially transparent release paper laminated on the sheet via the release material, and a print layer printed on the release paper. An adhesive layer provided on the release paper so as to cover the printing layer, and after adhering the test piece to a predetermined target with the adhesive layer, the sheet coated with the release material is used as the release paper. The peeling test method according to any one of claims 5 to 7, which is a transfer film that peels off from a transfer film.