JP4999963B2 - Concave surface adhesion test apparatus and concave surface adhesion test method - Google Patents

Description

  The present invention relates to a concave curved surface adhesion test apparatus and a concave curved surface adhesion test method for testing an adhesive state of an adhesive sheet that adheres to a concave curved surface.

  For example, an adhesive sheet having a decorative pattern or a comfortable skin is adhered to the surface of a product having a three-dimensional curved surface such as an automobile interior product. In many cases, automotive interior products are used at high temperatures. In this case, in order to test the adhesive strength of the pressure-sensitive adhesive sheet, the heat-resistant creep resistance indicating the adhesive retention strength at high temperatures is tested. (For example, refer to Patent Document 1).

  However, this measurement method is a method in which a pressure-sensitive adhesive sheet is bonded to a planar substrate, and a peeled state is measured by applying a constant load after a predetermined time has elapsed. For this reason, when an adhesive sheet is adhered to the concave curved surface portion and an extension strain is applied, or the adhesive sheet is a fabric, the relationship between the load and the extension strain changes depending on the type, and the load is applied by each sample. When it is necessary to change the test conditions, it is difficult to set the test conditions, and the correspondence between the test results and the product evaluation is not always sufficient. Therefore, the test results are merely a relative superiority comparison of the adhesive sheet.

In addition, there is also one that evaluates the creep property against a constant strain after the adhesive sheet is bonded (see, for example, Patent Document 2). However, in this case, an adhesive sheet with a small bending stress, such as an adhesive sheet of fabric used for interior parts for automobiles, hardly raises (peels) and is sufficient for evaluating creep properties. It wasn't.
Furthermore, there is a Japanese Industrial Standard JISZ 0237: 2009 “Adhesive tape / adhesive sheet test method”, which is a test method of a constant load, a method of measuring shear peeling measured at a predetermined peeling angle, and a concave curved surface portion. The adhesive tape used was not sufficient for evaluation.

  However, when an adhesive sheet is bonded to the surface of a product having a three-dimensional curved surface, partial elongation and contraction occur, and the adhesive strength of the adhesive sheet considering the extension and contraction can be tested. Sought practically. In particular, in a test in which an adhesive sheet is bonded to a concave curved surface, it has been difficult in the past to perform pressing, stretching conditions, and the like of the adhesive sheet to be bonded with good reproducibility.

For example, an adhesive sheet having a cushioning sheet having a fabric or a decorative pattern is bonded to the surface of an automobile interior product in order to improve the design and improve the touch. For the evaluation of the adhesive sheet, a method is generally used in which after the adhesive sheet is adhered to the surface of the actual resin interior product, a deterioration test is performed in a predetermined high temperature atmosphere, and then the presence or absence of peeling is evaluated. .
However, in general, the shape of the concave surface is three-dimensionally complicated, it is difficult to set the pressure at the time of adhesion of the pressure-sensitive adhesive sheet quantitatively, the elongation strain is also complicated, and it is difficult to standardize and standardize the evaluation results there were. In addition, in order to obtain the evaluation result of the actual product, the adhesive sheet is used by being bonded to the substrate of the actual resin product, so that it takes time and labor for the test.

JP 2008-238582 A JP 2005-350625 A

  Then, this invention aims at providing the testing apparatus and test method which can test reliably the heat resistance of the adhesive sheet, the peeling strength, etc. in the state in which the adhesive sheet was bonded to the concave curved surface in an extended state. .

In order to solve the above problems, the present invention of claim 1 is a concave curved surface adhesion test apparatus for testing an adhesive state of an adhesive sheet adhered to a concave curved surface having a predetermined curvature and depth.
The concave curved surface adhesion test apparatus has a concave curved surface pasting jig for bonding an adhesive sheet, and a concave curved surface pressing device for pressing the adhesive sheet to the concave curved surface pasting jig,
The concave curved surface pasting jig has a concave curved surface portion having a predetermined curvature and depth at the center portion, flat portions are formed on both sides of the concave curved surface portion, and an adhesive sheet is formed on the flat portion so that the adhesive sheet can be bonded,
The concave curved surface pressing device is provided with a jig holding portion that holds a concave curved surface pasting jig and an expansion member holding unit that can be raised and lowered above the held concave curved surface pasting jig. An expansion member of a flexible member is attached, the expansion member holding unit is close to the upper part of the concave curved surface pasting jig, and the expansion member expands with a predetermined pressure and is bonded to the flat portion of the concave curved surface pasting jig. The adhesive sheet is formed so that it can be crimped to the concave curved surface part of the concave curved surface pasting jig,
It is a concave curved surface adhesion test apparatus characterized in that it is possible to measure the degree of peeling from the concave curved surface portion of the concave curved surface attaching jig while the adhesive sheet is in an extended state.

  In the first aspect of the present invention, the concave curved surface attaching jig includes a concave curved surface portion having a predetermined curvature and depth at the center portion, flat portions on both sides of the concave curved surface portion, and an adhesive sheet on the flat portion. It is formed so that it can be bonded. For this reason, an adhesive sheet can be adhere | attached on a flat part, and it can adhere | attach, extending an adhesive sheet to a concave curved surface part with a concave curved surface press apparatus.

  The concave curved surface pressing device has a jig holding portion for holding a concave curved surface attaching jig. For this reason, the concave curved surface sticking jig to which the adhesive sheet is bonded can be held under the expansion member holding unit, and the expansion member holding unit can be placed on top of the adhesive sheet. It can be pressed against the concave curved surface.

  The inflatable member holding unit of the concave curved surface pressing device has an inflatable soft member inflatable on the lower surface, the inflatable member holding unit is close to the upper part of the concave curved surface sticking jig, and the inflatable member is inflated at a predetermined pressure. In addition, the pressure-sensitive adhesive sheet bonded to the flat portion of the concave curved surface attaching jig is formed to be capable of being crimped to the concave curved surface portion of the concave curved surface attaching jig in an expanded state. For this reason, the pressure-sensitive adhesive sheet bonded to the flat portion of the concave curved surface sticking jig can be uniformly pressed by the expansion member to the concave curved surface portion with a predetermined pressure, and the pressure sensitive adhesive sheet is concavely curved under stable bonding conditions. Can be glued to the part.

By selecting the shape of the concave curved surface portion, it is possible to change the elongation rate of the pressure-sensitive adhesive sheet and measure the relationship between the elongation rate and peeling.
Then, after applying the time-dependent change at room temperature or the environmental load at a predetermined temperature under a predetermined condition in which the pressure-sensitive adhesive sheet is stretched, the degree of peeling from the concave curved surface portion of the pressure-sensitive adhesive sheet can be measured. . For this reason, the expansion | extension state and adhesive force of an adhesive sheet can be measured on the adhesive sheet on various conditions.

  According to the present invention of claim 2, the concave curved surface pasting jig adheres a jig main body having a concave curved surface portion and a flat portion, a curved surface correction holder having a convex curved surface portion corresponding to the concave curved surface portion, and an adhesive sheet. The test plate is positioned on the concave curved surface portion of the jig body, and the convex curved surface portion of the curved correction holder presses both end portions of the test plate so that it follows the concave curved surface portion of the jig main body. It is a concave curved surface adhesion test apparatus having a configuration in which both end portions of a test plate are pressed and bent, and an adhesive sheet bonded to a flat portion can be bonded to the test plate.

  In the second aspect of the present invention, the concave curved surface bonding jig adheres a jig main body having a concave curved surface portion and a flat portion, a curved surface correction holder having a convex curved surface portion corresponding to the concave curved surface portion, and an adhesive sheet. And a test plate. For this reason, by replacing the test plate, it is possible to easily test the adhesive strength of a large number of adhesive sheets, to test various types of adhesive surfaces, and to reduce the concave portion to which the adhesive sheets are bonded. It is easy to clean.

  Position the test plate on the concave curved surface of the jig body, the convex curved surface of the curved straightening holder presses both ends of the test plate, and presses both ends of the test plate along the concave curved surface of the jig main body. The pressure-sensitive adhesive sheet having a configuration that is curved and bonded to the flat portion can be bonded to the test plate. For this reason, a flat test plate can be bent along a predetermined concave curved surface portion, and it is not necessary to bend and mold the test plate into a predetermined concave curved surface in advance, and a large number of various types of test plates can be used. it can. The adhesive sheet can be adhered in a stretched state to a test plate curved along the concave curved surface portion.

  According to the third aspect of the present invention, the inflating member is formed of a balloon-like rubber film, and the inflating member is inflated by applying pressure to the inflating member in the balloon-like shape. It is a concave curved surface adhesion test device that is pressure-bonded to a part or a test plate.

  In the present invention of claim 3, the inflating member is formed of a balloon-like rubber film, and the inflating member is inflated by applying pressure to the balloon-like inflating member, and the adhesive sheet is attached to the concave curved surface of the jig body by the inflating pressure. Crimped to the part or test plate. For this reason, with a simple device, the adhesive sheet can be pressed with a uniform pressure along the concave curved surface portion of the jig body or the concave curved surface of the test plate, and the adhesive force can be measured under uniform conditions, By adjusting the pressure, the adhesive sheet can be stretched and bonded at a predetermined pressure.

  According to the fourth aspect of the present invention, in the expansion member holding unit, a space portion is formed on the bottom surface, the space portion is covered with a rubber film, pressure is applied to the space portion, the rubber film is expanded, and the expansion pressure is adhesive. It is a concave curved surface adhesion test device in which a sheet is pressure-bonded to a concave curved surface portion of a jig body or a test plate.

  According to the present invention of claim 4, the expansion member holding unit has a space portion formed on the bottom surface, covers the space portion with a rubber film, applies pressure to the space portion, expands the rubber film, and adheres with the expansion pressure. The sheet was pressure-bonded to the concave curved surface portion of the jig body or the test plate. For this reason, the rubber film can be uniformly expanded and pressed along the concave curved surface with a uniform pressure, and the adhesive sheet can be stretched with a predetermined pressure to measure the adhesive force under a uniform condition. it can. As the pressure, air pressure or oil pressure can be used.

The present invention of claim 5 is a concave curved surface adhesion test method for testing an adhesive state of an adhesive sheet adhered to a concave curved surface having a predetermined curvature and depth.
The concave curved surface adhesion test method uses a concave curved surface pasting jig for bonding an adhesive sheet, and a concave curved surface pressing device for pressing the adhesive sheet to the concave curved surface pasting jig,
Adhering the adhesive sheet to the flat part of the concave curved surface pasting jig in which the flat part is formed on both sides of the concave curved part and the concave curved part having a predetermined curvature and depth in the center part,
Attach the concave curved surface sticking jig with the adhesive sheet attached to the jig holding part of the concave curved surface pressing device,
Lower the expansion member holding unit of the concave curved surface pressing device positioned so as to be movable up and down on the upper part of the held concave curved surface pasting jig so as to be close to the concave curved surface pasting jig,
The inflatable member attached to the lower surface of the inflatable member holding unit is inflated with a predetermined pressure, and the adhesive sheet adhered to the flat portion of the concave curved surface sticking jig is extended to the concave curved surface portion of the concave curved surface sticking jig. After crimping,
It is a concave curved surface adhesion test method characterized by measuring the degree of peeling from the concave curved surface portion of the concave curved surface attaching jig while the adhesive sheet is in an expanded state.

  In the present invention of claim 5, the adhesive sheet is bonded to the flat portion of the concave curved surface attaching jig having a concave curved surface portion having a predetermined curvature and depth at the central portion and flat portions formed on both sides of the concave curved surface portion. Then, the concave curved surface attaching jig to which the adhesive sheet was adhered was attached to the jig holding portion of the concave curved surface pressing device. For this reason, after adhering the adhesive sheet to the flat portion in a flat plate shape, the concave curved surface pasting jig to which the adhesive sheet is adhered is held under the expansion member holding unit of the concave curved surface pressing device. The adhesive sheet can be pressed against the concave curved surface portion in an extended state.

  The expansion member holding unit of the concave curved surface pressing device positioned so as to be movable up and down on the upper part of the held concave curved surface pasting jig is lowered so as to be close to the concave curved surface pasting jig, and the expansion attached to the lower surface of the expansion member holding unit The member was expanded with a predetermined pressure, and the pressure-sensitive adhesive sheet adhered to the flat portion of the concave curved surface attaching jig was crimped to the concave curved surface portion of the concave curved surface attaching jig in an expanded state. For this reason, the pressure-sensitive adhesive sheet bonded to the flat portion of the concave curved surface attaching jig can be uniformly pressed by the expansion member with a predetermined pressure of the concave curved surface portion, and the pressure-sensitive adhesive sheet is concavely curved under stable bonding conditions. Can be glued to the part.

By selecting the shape of the concave curved surface portion, it is possible to change the elongation rate of the pressure-sensitive adhesive sheet and measure the relationship between the elongation rate and peeling.
Then, after applying the time-dependent change at room temperature or the environmental load at a predetermined temperature under a predetermined condition in which the pressure-sensitive adhesive sheet is stretched, the degree of peeling from the concave curved surface portion of the pressure-sensitive adhesive sheet can be measured. . For this reason, the expansion | extension state and adhesive force of an adhesive sheet can be measured on the adhesive sheet on various conditions.
Thereafter, the degree of peeling from the concave curved surface portion of the pressure-sensitive adhesive sheet can be measured under a predetermined condition such as a heat resistance test, and the extension degree and adhesive force of the pressure-sensitive adhesive sheet can be measured.

When the adhesive sheet is bonded to the concave curved surface attaching jig according to the present invention of claim 6,
The concave curved surface pasting jig uses a jig main body having a concave curved surface portion and a flat portion, a curved surface correction holder having a convex curved surface portion corresponding to the concave curved surface portion, and a test plate for adhering an adhesive sheet. The test plate is positioned on the concave curved surface portion of the jig body, and the convex curved surface portion of the curved correction holder presses both ends of the test plate so that the test plate is pressed along the concave curved surface portion of the jig main body. After bending and sticking the adhesive sheet to the flat part of the concave curved surface sticking jig having a curved test plate,
The expansion member attached to the lower surface of the expansion member holding unit is expanded with a predetermined pressure, and the adhesive sheet adhered to the flat portion of the concave curved surface attaching jig is extended along the concave curved surface portion of the concave curved surface bonding jig. This is a concave curved surface adhesion test method in which a test plate curved in a state is pressure-bonded.

  In this invention of Claim 6, a concave curved surface sticking jig | tool adhere | attaches an adhesive sheet | seat and the adhesive sheet | seat which has a convex curved surface part corresponding to a concave curved surface part, the jig main body which has a concave curved surface part and a flat part. The one having a test plate is used. For this reason, by replacing the test plate, it is possible to easily test the adhesive strength of a large number of adhesive sheets, to test various types of adhesive surfaces, and to reduce the concave portion to which the adhesive sheets are bonded. It is easy to clean.

  Position the test plate on the concave curved surface of the jig body, and press the test plate so that the convex curved surface of the curved straightening holder presses both ends of the test plate along the concave curved surface of the jig main body. The adhesive sheet was bonded to the flat part of the concave curved surface pasting jig having a curved test plate. For this reason, a flat test plate can be bent along a predetermined concave curved surface portion, and it is not necessary to bend the test plate into a predetermined concave curved surface in advance, and a large number of various types of test plates can be used.

  Position the test plate on the concave curved surface of the jig body, the convex curved surface of the curved straightening holder presses both ends of the test plate, and presses both ends of the test plate along the concave curved surface of the jig main body. The pressure-sensitive adhesive sheet that can be curved and adhered to the flat portion was adhered to the test plate. For this reason, a flat test plate can be bent along a predetermined concave curved surface portion, and it is not necessary to bend and mold the test plate into a predetermined concave curved surface in advance, and a large number of various types of test plates can be used. it can. The adhesive sheet can be adhered in a stretched state to a test plate curved along the concave curved surface portion.

  The expansion member attached to the lower surface of the expansion member holding unit is expanded with a predetermined pressure, and the adhesive sheet adhered to the flat portion of the concave curved surface attaching jig is extended along the concave curved surface portion of the concave curved surface bonding jig. Crimp to a curved test plate. For this reason, the pressure-sensitive adhesive sheet bonded to the flat portion of the concave curved surface pasting jig can be uniformly pressed by the expansion member to the concave curved surface portion with a predetermined pressure, and the pressure-sensitive adhesive sheet can be stably bonded. Can be adhered to the concave curved surface portion.

  In the seventh aspect of the present invention, the inflating member is formed of a balloon-like rubber film, and the inflating member is inflated by applying pressure to the inflating member in the balloon-like shape. It is a concave curved surface adhesion test method that is crimped to a part or a test plate.

  In the present invention of claim 7, the inflating member is formed of a balloon-like rubber film, and the inflating member is inflated by applying pressure to the balloon-like inflating member. Crimped to the part or test plate. For this reason, with a balloon-like rubber film, the adhesive sheet can be pressed with uniform pressure along the concave curved surface portion of the jig body or the concave curved surface of the test plate, and the adhesive force can be measured under uniform conditions. it can. By adjusting the pressure, the adhesive sheet can be stretched and bonded at a predetermined pressure.

  According to the present invention of claim 8, the expansion member holding unit has a space portion formed on the bottom surface, covers the space portion with a rubber film, applies pressure to the space portion, expands the rubber coating, and adheres with the expansion pressure. This is a concave curved surface adhesion test method in which a sheet is pressure-bonded to a concave curved surface portion of a jig body or a test plate.

  In the present invention according to claim 8, the expansion member holding unit has a space portion formed on the bottom surface, covers the space portion with a rubber film, applies pressure to the space portion, expands the rubber coating, and adheres with the expansion pressure. The sheet was pressure-bonded to the concave curved surface portion of the jig body or the test plate. For this reason, the rubber film can be uniformly expanded and pressed along the concave curved surface with a uniform pressure, and the adhesive sheet can be stretched with a predetermined pressure to measure the adhesive force under a uniform condition. it can.

  In the present invention of claim 9, before the adhesive sheet is bonded to the concave curved surface sticking jig, a checkerboard pattern is drawn on the surface of the adhesive sheet and bonded to the concave curved surface portion in an expanded state. This is a concave curved surface adhesion test method for measuring the state of elongation of an adhesive sheet.

  In the present invention of claim 9, before the adhesive sheet is bonded to the concave curved surface sticking jig, a grid pattern is drawn on the surface of the adhesive sheet, and the distortion of the grid pattern bonded in an expanded state to the concave curved surface portion. The state of elongation of the adhesive sheet is measured. For this reason, when the adhesive sheet is bonded to the concave curved surface sticking jig, the extension of each part of the adhesive sheet can be measured by the change in the checkerboard pattern, and the number of peeled cells after bonding can be determined. By counting, the adhesive strength can be measured.

  According to the tenth aspect of the present invention, the adhesive sheet bonded to the concave curved surface sticking jig is pressure-bonded to the concave curved surface portion of the concave curved surface sticking jig, and after a predetermined time has passed, This is a concave curved surface adhesion test method for measuring the degree of peeling from a curved surface portion.

  In this invention of Claim 10, after pressure-bonding the adhesive sheet adhere | attached on the concave curved surface sticking jig to the concave curved surface part of a concave curved face sticking jig, after leaving still at predetermined temperature for a predetermined time, The degree of peeling from the concave curved surface portion is measured. For this reason, the measurement of the adhesive strength after a time-dependent change and heat deterioration can be made easy.

  In the present invention, the expansion member of the expansion member holding unit expands at a predetermined pressure so that the adhesive sheet bonded to the concave curved surface pasting jig is crimped to the concave curved surface portion of the concave curved surface pasting jig in an expanded state. The inflatable member can uniformly press the adhesive sheet adhered to the flat part of the concave curved surface bonding jig to the concave curved surface part with a predetermined pressure. Can be glued. In addition, it is possible to measure the degree of peeling from the concave curved surface portion of the pressure-sensitive adhesive sheet in an expanded state under predetermined conditions such as a heat resistance test, and to measure the expanded state and adhesive force of the pressure-sensitive adhesive sheet. .

1 illustrates an embodiment of the present invention and is a front view of a concave curved surface adhesion test apparatus. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a side view of a concave curved surface adhesion test apparatus. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention and is an exploded perspective view of a concave curved surface attaching jig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, showing an embodiment of the present invention, is a perspective view of a state in which a test plate is attached to a concave curved surface attaching jig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a perspective view of a state where an adhesive sheet is attached to a flat portion of a concave curved surface attaching jig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a front view showing a state where an expansion member holding unit of a concave curved surface pressing device is close to an upper portion of a concave curved surface sticking jig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a front view showing a state where an expansion member of an expansion member holding unit of a concave curved surface pressing device is inflated and is in close contact with a concave curved surface attaching jig. 1 illustrates an embodiment of the present invention and is a cross-sectional view of a concave curved surface portion of a concave curved surface attaching jig. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial perspective view illustrating an embodiment of the present invention in a state where an adhesive sheet is attached to a flat portion of a concave curved surface attaching jig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a partial perspective view in a state where an adhesive sheet is bonded to a concave curved surface portion of a concave curved surface attaching jig.

An embodiment of the present invention will be described with reference to FIGS.
First, the concave curve adhesion test apparatus 1 will be described, and then a concave curve adhesion test method using the concave curve adhesion test apparatus 1 will be described.
The concave curved surface adhesion test apparatus 1 includes a concave curved surface pressing device 10 and a concave curved surface attaching jig 30. The concave curved surface pasting jig 30 will be described first, and then the concave curved surface pressing device 10 will be described.

As shown in FIG. 3, the concave curved surface pasting jig 30 has a rectangular block-shaped jig main body 31. The jig body 31 has a concave curved surface portion 32 having a groove with a predetermined curvature and depth continuously in the lateral direction at the center, and flat portions 33 that are horizontally flat on both sides of the concave curved surface portion 32. . As will be described later, both end portions of the pressure-sensitive adhesive sheet 50 are formed on the flat portion 33 so as to be bonded in a flat plate shape.
The central portion of the adhesive sheet 50 can be pressed and adhered directly to the concave curved surface portion 32, or the adhesive sheet 50 can be adhered to the test plate 40 described later.

  When the test plate 40 is used, as shown in FIG. 3, the concave curved surface attaching jig 30 uses a jig body 31 having a concave curved surface portion 32 and a flat portion 33, and a curved surface correction holder 35. Two curved surface correction holders 35 have convex curved surface portions 36 corresponding to the concave curved surface portions 32 and are used so as to be attached to both left and right ends of the groove-shaped concave curved surface portion 32.

  To attach the test plate 40, first, the test plate 40 is placed under the convex curved surface portion 36, and both side portions of the test plate 40 are pressed by the convex curved surface portions 36 of the two curved surface correction holders 35. Then, the bolt 38 is inserted into the holder bolt hole 37 formed at both ends of the curved surface correction holder 35, and the bolt 38 is screwed into the main body bolt hole 34 provided at the corresponding portion of the flat portion 33 of the jig main body 31. Secure with. Then, as shown in FIG. 4, the test plate 40 pressed and fixed by the curved surface correction holder 35 can be curved along the concave curved surface portion 32 of the jig body 31.

  In this way, the flat test plate 40 can be bent, and by replacing the test plate 40, the adhesive force of a large number of adhesive sheets 50 can be easily tested. Therefore, if various types of test plates 40 are prepared, it is possible to easily test various types of adhesive surfaces. Moreover, since the adhesive sheet 50 is not directly bonded to the concave curved surface portion 32, the surface to be bonded can be easily cleaned. The test plate 40 can be evaluated as an implementation product by using the same material as the base material to which the adhesive sheet 50 is bonded in the implementation product.

Next, the concave curved surface pressing device 10 will be described. As shown in FIG. 1 and FIG. 2, the concave curved surface pressing device 10 includes a jig holding portion 17 a that holds a concave curved surface pasting jig 30, and an expansion member holding that can be moved up and down on the upper part of the held concave curved face pasting jig 30. A unit 20 is included.
The jig holding portion 17a is provided in the vicinity of the center of the concave curved surface pressing device base portion 17 provided in the lower portion of the concave curved surface pressing device 10, and is located directly below the expansion member holding unit 20 described later. The concave curved surface attaching jig 30 is fixed to the jig holding portion 17a by screws, bands, fasteners, and the like. Therefore, the adhesive sheet 50 can be pressed by the expansion member holding unit 20 while holding the concave curved surface attaching jig 30 to which the adhesive sheet 50 is bonded.

A column 17C is attached to the concave curved surface pressing device base portion 17, an air cylinder 13 is attached to the column 17C, and an expansion member holding unit 20 is attached to the tip of the air cylinder 13 so as to be movable up and down. Yes.
In order to send air to the air cylinder 13, an air cylinder regulator 11 and an air cylinder solenoid valve 12 are attached, and these are connected by an air hose. It is also possible to drive by hydraulic pressure instead of pneumatic pressure.

A rubber film 21 that is an expansion member is attached to the tip of the expansion member holding unit 20. In order to inflate the rubber film 21 with air pressure, an expansion member regulator 14, an expansion member supply pressure gauge 16, and an expansion member solenoid valve 15 are attached. These are connected by an air hose so that the rubber film 21 can be expanded at a predetermined pressure. Note that, similarly to the above, it is possible to drive by hydraulic pressure instead of pneumatic pressure.
The back plate 17b is provided with a control plate 18 and a switch box 19 for driving the concave curved surface pressing device 10.

  A space 23 can be formed on the bottom surface between the expansion member holding unit 20 and the rubber film 21. In this case, the space portion 23 is covered with the rubber film 21, and air pressure or hydraulic pressure is applied to the space portion 23 to expand the rubber film 21, and the adhesive sheet 50 is attached to the concave curved surface portion of the jig body 31 by the expansion pressure. 32 or the test plate 40. The rubber film 21 can be uniformly expanded by air pressure or hydraulic pressure, and the adhesive sheet 50 can be pressed with a uniform pressure along the concave curved surface portion 32 or the concave curved surface of the test plate 40. The stretchable sheet 50 can be stretched and bonded under uniform conditions.

  The rubber film 21, which is an inflatable member of the inflatable soft member of the inflatable member holding unit 20, is expanded at a predetermined pressure, and both ends are bonded to the flat portion 33 of the concave curved surface attaching jig 30. The central portion of the adhesive sheet 50 is pressure-bonded to the concave curved surface portion 32 of the concave curved surface attaching jig 30. For this reason, the rubber sheet 21 can press the adhesive sheet 50 adhered to the flat portion 33 of the concave curved surface sticking jig 30 with the predetermined pressure of the concave curved surface portion 32, and the adhesive sheet 50 is adhered under stable adhesive conditions. The adhesive sheet 50 can be extended and bonded to the concave curved surface portion 32.

Next, a concave curved surface adhesion test method for measuring the degree of peeling from the concave curved surface portion 32 of the adhesive sheet 50 using the concave curved surface pressing device 10 and the concave curved surface attaching jig 30 will be described.
First, the both end portions of the adhesive sheet 50 are attached to the flat portion 33 of the concave curved surface attaching jig 30. The concave curved surface pasting jig 30 will be described by taking an example in which the test plate 40 is used as shown in FIG. 3, but the adhesive sheet 50 is directly attached to the concave curved surface pasting jig 30 without using the test plate 40. Even when it adheres to the curved surface part 32, it can be used similarly.

  First, the test plate 40 is attached to the jig body 31 of the concave curved surface attaching jig 30. The test plate 40 is placed on the concave curved surface portion 32 of the jig body 31, and the side edges of the test plate 40 are pressed by the convex curved surface portions 36 of the two curved surface correction holding devices 35, so that the curved surface correction holding device 35 is fixed to the jig. The main body 31 is fixed with bolts 38. Thereby, as shown in FIG. 4, the test plate 40 is bent along the curved surface of the concave curved surface portion 32. For this reason, by replacing the test plate 40 to which the adhesive sheet 50 is adhered, the adhesive surface can be easily cleaned, and the adhesive force of a large number of adhesive sheets 50 can be easily tested. You can test the surface. The same material as the product to which the adhesive sheet 50 is actually bonded can be selected.

  Next, both end portions of the adhesive sheet 50 are bonded to the flat portion 33 of the concave curved surface attaching jig 30. As shown in FIG. 5, the adhesive sheet 50 is bonded in a flat plate shape to the flat portions 33 on both sides of the jig body 31 across the concave curved surface portion 32. At this time, as shown in FIG. 9, a cell pattern 51 can be drawn on the surface of the adhesive sheet 50, and the adhesive sheet 50 having the cell pattern 51 can be adhered.

  Next, as shown in FIGS. 1 and 2, the concave curved surface attaching jig 30 to which the adhesive sheet 50 is bonded is attached to the concave curved surface pressing device 10. The concave curved surface pasting jig 30 is fixed by the jig holding portion 17 a of the concave curved surface pressing device 10. Then, as shown in FIG. 6, the adhesive sheet 50 of the concave curved surface sticking jig 30 can be positioned directly below the expansion member holding unit 20 of the concave curved surface pressing device 10.

  Next, when the switch of the switch box 19 is pressed, the air cylinder solenoid valve 12 is opened, air flows into the air cylinder 13 via the air cylinder regulator 11, and the expansion member attached to the air cylinder 13 is held. The unit 20 descends and comes into contact with the concave curved surface attaching jig 30 and stops. After stopping, the rubber film 21 which is an expansion member attached to the lower surface of the expansion member holding unit 20 comes close to the upper part of the adhesive sheet 50 bonded to the concave curved surface attaching jig 30. In addition, raising / lowering of the expansion member holding unit 20 can be performed not only by air pressure but also by oil pressure.

Next, the expansion member solenoid valve 15 is opened, and air flows from the air pipe 22 to the inner surface of the balloon-shaped rubber film 21 via the expansion member regulator 14 as shown in FIG. Inflate.
At this time, the space 23 can be formed on the bottom surface of the expansion member holding unit 20 as described above. In this case, the space part 23 can be covered with the rubber film 21, and the rubber film 21 can be expanded by applying air pressure to the space part 23. For this reason, the rubber film 21 can be expanded uniformly.
The expansion of the rubber film 21 can be performed not only by air pressure but also by oil pressure.
The rubber film 21 that is an expansion member can be made of a material that can be elastically expanded / contracted other than rubber.

  With the expansion pressure of the rubber film 21, the central portion of the adhesive sheet 50 is pressure-bonded to the test plate 40 bent into a concave curved surface shape of the jig body 31. When the test plate 40 is not used, the adhesive sheet 50 is directly bonded to the concave curved surface portion 32 of the jig body 31. The adhesive sheet 50 can be pressed with a uniform pressure along the concave curved surface of the test plate 40 by the expansion pressure of the rubber film 21. Since the pressure-sensitive adhesive sheet 50 can be stretched under a predetermined pressure and bonded under uniform conditions, the adhesive force (peeled state) of the bonded pressure-sensitive adhesive sheet 50 can be measured.

At this time, in order to precisely control the pressure applied to the rubber film 21, an expansion member regulator 14 that can be precisely controlled is used, and the supply pressure is controlled by the expansion member supply pressure gauge 16.
When the grid pattern 51 is drawn on the surface of the adhesive sheet 50, the adhesive sheet 50 adhered by the rubber film 21 is extended to the concave curved surface of the test plate 40 as shown in FIG. Although it adheres, by measuring the elongation of the checkerboard pattern 51, it is possible to measure which portion is stretched to what extent.

The elongation rate of the adhesive sheet 50 can be freely set by selecting the shape of the concave curved surface portion 32 of the jig body 31.
In this Embodiment, it measured about the elongation rate of the adhesive sheet 50, 20%, 30%, and 40%. As shown in FIG. 8, the elongation rate of the adhesive sheet 50 is Lo, which is the original length of the adhesive sheet 50 (linear distance on the concave curved surface portion 32), and the length after the elongation (concave curved surface portion 32). If the angle ω is in radians, the elongation applied to the adhesive sheet 50 is L / Lo. Assuming that the radius of the circle is r and the maximum depth D of the concave curved surface portion 32 from both ends, there is a relationship of the following formulas 1 to 3, and if a predetermined elongation ratio L / Lo is set, the formula 1 The angle of the concave curved surface portion of the arc can be obtained.
If the straight line distance Lo is set, the radius of the circle can be obtained from Equation 2, and the maximum depth D can be obtained from Equation 3.

L / Lo = θ · sin θ (where θ = ω / 2) Equation 1
r = (Lo / 2) / sin θ Equation 2
D = r · (1−cos θ) Equation 3
Thus, the adhesive force of the adhesive sheet 50 in a different elongation rate can be measured by preparing many types of concave curved surface portions 32 having a predetermined depth and curvature.

  Next, after the adhesive sheet 50 adhered to the test plate 40 of the concave curved surface pasting jig 30 is left at a predetermined temperature for a predetermined time, the adhesive sheet 50 is peeled off from the test plate 40 or the concave curved surface portion 32. Measure the condition. In this embodiment, the film was cured at room temperature (23 ° C.) for 24 hours, and then allowed to stand in an atmosphere at 80 ° C. for 24 hours, and the peel strength was measured. For this reason, the measurement of the adhesive strength after a time-dependent change and heat deterioration can be made easy.

In the present embodiment, the peel strength in an atmosphere at 80 ° C. was measured. However, the concave curved surface attaching jig 30 to which the adhesive sheet 50 was adhered was simply placed in a place where the ambient temperature was changed. It can be measured under the following conditions. Thereby, the deterioration test can be performed on the adhesive force of the adhesive sheet 50 from room temperature to a low temperature or a high temperature.
When the grid pattern 51 is drawn on the surface of the pressure-sensitive adhesive sheet 50, the peeled state and the peel strength can be measured by counting the number of peeled grids.
In addition, the peeling force from the concave curved surface portion 32 can be measured by pulling the end of the adhesive sheet 50 adhered to the concave curved surface portion 32.

DESCRIPTION OF SYMBOLS 1 Concave surface adhesion test apparatus 10 Concave surface pressing apparatus 20 Expansion member holding unit 21 Rubber film (expansion member)
DESCRIPTION OF SYMBOLS 30 Recessed surface sticking jig 31 Jig body 32 Recessed curved surface part 33 Flat part 35 Curved surface correction holder 40 Test plate 50 Adhesive sheet

Claims (10)

In a concave curved surface adhesion test apparatus for testing the adhesive state of an adhesive sheet that adheres to a concave curved surface having a predetermined curvature and depth,
The concave curved surface adhesion test apparatus has a concave curved surface attaching jig for bonding the adhesive sheet, and a concave curved surface pressing device for pressing the adhesive sheet to the concave curved surface attaching jig,
The concave curved surface pasting jig is formed such that a concave curved surface portion having a predetermined curvature and depth is formed in a central portion, and flat portions are formed on both sides of the concave curved surface portion, and the adhesive sheet can be bonded to the flat portion. And
The concave curved surface pressing device includes a jig holding unit that holds the concave curved surface pasting jig, and an expansion member holding unit that can be moved up and down on an upper part of the held concave curved surface pasting jig. An expansion member of an inflatable soft member is attached, the expansion member holding unit is close to the upper part of the concave curved surface attaching jig, and the expansion member expands with a predetermined pressure, and the concave curved surface attaching jig The pressure-sensitive adhesive sheet adhered to the flat part of the concave curved surface pasting jig is formed to be capable of being crimped in an extended state on the concave curved surface part of the jig,
A concave curved surface adhesion test apparatus characterized in that it is possible to measure the degree of peeling of the concave curved surface attaching jig from the concave curved surface portion while the adhesive sheet is in an expanded state.   The concave curved surface attaching jig includes a jig main body having the concave curved surface portion and the flat portion, a curved surface correction holding tool having a convex curved surface portion corresponding to the concave curved surface portion, and a test plate to which an adhesive sheet is bonded. The test plate is positioned on the concave curved surface portion of the jig main body, and the convex curved surface portions of the curved correction holder press both ends of the test plate so that the concave curved surface portion of the jig main body is aligned. The concave curved surface adhesion test apparatus according to claim 1, further comprising a configuration in which both end portions of the test plate are pressed and curved, and the adhesive sheet adhered to the flat portion can be adhered in an expanded state.   The expansion member is formed of a balloon-like rubber film, applies pressure to the balloon-like expansion member to expand the expansion member, and the expansion pressure causes the adhesive sheet to be attached to the concave curved surface portion of the jig body or the test plate. The concave curved surface adhesion test apparatus according to claim 1 or 2, which is crimped to the concave curved surface.   The expansion member holding unit has a space portion formed on the bottom surface, covers the space portion with a rubber film, applies pressure to the space portion, expands the rubber film, and the expansion sheet holds the adhesive sheet to the jig. The concave curved surface adhesion test apparatus according to claim 1 or 2, wherein the concave curved surface portion of the main body or the test plate is pressure-bonded. In the concave curved surface adhesion test method for testing the adhesive state of the adhesive sheet that adheres to the concave curved surface having a predetermined curvature and depth,
The concave curved surface adhesion test method uses a concave curved surface attaching jig that adheres the adhesive sheet, and a concave curved surface pressing device that presses the adhesive sheet to the concave curved surface attaching jig.
Adhering the adhesive sheet to a concave portion having a predetermined curvature and depth at the center, and a flat portion of the concave curved surface pasting jig in which flat portions are formed on both sides of the concave curved portion,
The concave curved surface pasting jig to which the adhesive sheet is bonded is attached to the jig holding portion of the concave curved surface pressing device,
Lowering the expansion member holding unit of the concave curved surface pressing device positioned so as to be movable up and down on the upper part of the concave curved surface pasting jig held so as to be close to the concave curved surface pasting jig,
The inflatable member attached to the lower surface of the inflatable member holding unit is inflated with a predetermined pressure, and the adhesive sheet bonded to the flat portion of the concave curved surface attaching jig is used as the concave curved surface portion of the concave curved surface attaching jig. After crimping in an expanded state,
A concave curved surface adhesion test method, comprising: measuring a degree of peeling of the concave curved surface attaching jig from the concave curved surface portion while the adhesive sheet is in an extended state. When bonding the adhesive sheet to the concave curved surface pasting jig,
The concave curved surface attaching jig includes a jig main body having the concave curved surface portion and the flat portion, a curved surface correction holding tool having a convex curved surface portion corresponding to the concave curved surface portion, and a test plate to which an adhesive sheet is bonded. The test plate is positioned on the concave curved surface portion of the jig body, and the convex curved surface portion of the curved correction holder presses both end portions of the test plate to form the concave curved surface portion of the jig main body. After pressing the test plate so as to be curved, after bonding the adhesive sheet to the flat part of the concave curved surface pasting jig having the curved test plate,
The inflatable member attached to the lower surface of the inflatable member holding unit is inflated with a predetermined pressure, and the adhesive sheet bonded to the flat portion of the concave curved surface attaching jig is used as the concave curved surface portion of the concave curved surface attaching jig. The concave curved surface adhesion test method according to claim 5, wherein the test plate is crimped to the test plate curved in a stretched state.   The expansion member is formed of a balloon-like rubber film, applies pressure to the balloon-like expansion member to expand the expansion member, and the expansion pressure causes the adhesive sheet to be attached to the concave curved surface portion of the jig body or the test plate. The concave curved surface adhesion test method according to claim 5 or 6, wherein the concave curved surface adhesion test method is performed.   The expansion member holding unit has a space portion formed on the bottom surface, covers the space portion with a rubber film, applies pressure to the space portion, expands the rubber film, and the expansion sheet holds the adhesive sheet to the jig. The concave curved surface adhesion test method according to claim 5 or 6, wherein the concave curved surface portion of the main body or the test plate is pressure-bonded.   Before adhering the pressure-sensitive adhesive sheet to the concave curved surface sticking jig, draw a grid pattern on the surface of the pressure-sensitive adhesive sheet and strain the grid pattern on the concave curved surface portion in an expanded state. The concave curved surface adhesion test method according to any one of claims 5 to 8, wherein an elongation state of the adhesive sheet is measured.   After pressure-bonding the adhesive sheet bonded to the concave curved surface pasting jig to the concave curved surface portion of the concave curved surface pasting jig, after a predetermined time at a predetermined temperature, from the concave curved surface portion of the adhesive sheet The concave curved surface adhesion test method according to any one of claims 5 to 9, wherein a degree of peeling is measured.

Images