JP2009210463A - Tackiness measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tackiness measuring instrument capable of accurately grasping the status of tackiness. <P>SOLUTION: In the tackiness measuring instrument, constituted so that a material to be measured is adhered to a predetermined adherend and the force necessary for peeling the material to be measured from the adherend is detected, to measure the tackiness of the material to be measured, the material to be measured is adhered to the adherend, in a state where shearing is inputted. For example, a guide roll for guiding the rubber material, which is peeled from the surface of an adherend roll to be formed into a sheet, is provided and the torque of the guide roll is measured to detect the force necessary for peeling the rubber material from the adherend. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adhesive force measuring device, and more particularly to an adhesive force measuring device for a rubber material that can accurately grasp the adhesive state of a rubber material in terms of factory workability.

  Various types of conventional adhesive force measuring devices have been proposed. For example, as a device for measuring the adhesive strength of the surface of an adhesive-coated sheet or label material, the contact of the contact with the moving surface against the movement of the sheet in the feeding direction, the resistance in the moving direction at that time There is an adhesive force measuring device that measures a load (for example, Patent Document 1).

Further, as a method for measuring the adhesive strength of an adhesive label, an adhesive tape, etc., a method has been proposed in which the adhesive strength is measured by freely selecting the peel angle in the range of 90 ° to 180 ° (for example, Patent Document 2). ).
Furthermore, in recent years, a portable adhesive force measuring device that can easily measure the adhesive force of unvulcanized rubber or adhesive tape has been proposed. It is generally known that the adhesive strength of unvulcanized rubber changes with time. It is known that it varies depending on the production conditions and storage conditions of the unvulcanized rubber member, particularly the condition of being exposed to dust on the surface. In order to increase the reliability of the adhesiveness between products of products manufactured by bonding unvulcanized rubber members, it is necessary to measure whether or not the unvulcanized rubber members have a predetermined adhesive strength in the bonding process. It is important.
Therefore, from the necessity of measuring and managing the adhesive force of the change material, the sheet-like standard sample having adhesiveness is pressed against the surface of the object to be measured for a certain time with a preset indentation pressure, There has been proposed an adhesive force measuring apparatus which measures the stress generated when a standard sample is pulled away from the surface of the object to be measured to measure the adhesive force of the object to be measured (see, for example, Patent Document 3). ).

JP 61-155728 A JP-A-1-92639 JP-A-6-273316

By the way, with the conventional apparatus, it was not possible to measure the adhesive strength of what was affixed due to the shearing force. In addition, it is difficult to prevent contamination from dust and the like on the adhesion surface, and accurate adhesion evaluation cannot be performed.
Therefore, the present invention intends to provide an adhesive force measuring device capable of accurately grasping the adhesive situation.

The inventors of the present invention need to adhere a material to be measured, for example, an unvulcanized rubber material, to a predetermined adherend, for example, a roll in a process line, and peel the material to be measured from the adherend. It was found that the adhesive force of the material to be measured can be measured by detecting a strong force. Then, the peel angle between the measured material and the adherend is in the range of 0 to 90 °, and the measured material is attached to the adherend while being sheared, that is, the measured material is sheared. By applying force and adhering directly to one of the rolls that is the adherend in a kneaded state, the adhesive force of the material to be measured is continuously and simply detected accurately by detecting the necessary force during peeling. It has been found that the above problem can be achieved.
That is, the adhesive force measuring apparatus of the present invention is characterized by the following configuration or structure.

  (1). In an apparatus for measuring the adhesive force of a material to be measured by attaching a material to be measured to a predetermined adherend and detecting the force required to peel the material to be measured from the adherend, the material to be measured is: An adhesive force measuring apparatus that adheres to an adherend in a state of being sheared.

(2). The adhesive force measuring apparatus according to (1), wherein the material to be measured is a rubber material.
(3). The shear force input state of the rubber material is generated by kneading the rubber material on a roll, and is directly attached to the roll.
(4). The adhesive force measuring apparatus according to any one of (1) to (3), wherein a peel angle between the material to be measured and the adherend is in a range of 0 to 90 °.
(5). A guide roll is provided that guides the rubber material that has been peeled off from the adherend roll surface in a predetermined direction B, and the torque of the guide roll is measured to peel the rubber material from the adherend. The adhesive force measuring apparatus according to the above (3), which detects a necessary force.
(6). The adhesive force measuring apparatus according to any one of the above (1) to (6), wherein the temperature at the time of peeling the measured material from the adherend is in the range of 30 to 200 ° C.
According to the above means, the following operation can be obtained.

  According to the adhesive force measuring apparatus of the present invention, since the material to be measured that changes with the passage of time, such as unvulcanized rubber, is attached to an adherend such as a roll, it is in a state of being sheared and input, so A new surface adheres to the roll surface, and an accurate adhesive force measurement is possible.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an adhesive force measuring apparatus according to the present invention. FIG. 2 is an enlarged view in P of FIG. 1 showing an angle when a material to be measured (rubber sheet) is peeled from a roll as an adherend. FIG. 3 is a graph showing the relationship between the adhesive force (peeling force) and time by the adhesive force measuring device of the present invention.

  As shown in FIG. 1, the adhesive force measuring apparatus according to the embodiment attaches an unvulcanized kneaded rubber (material to be measured) 3 to a predetermined roll (adhered body) 2 and removes the unvulcanized rubber 3 from the roll 2. The force required for peeling is detected and the adhesive strength of the unvulcanized rubber 3 is continuously measured. And the peeling angle (theta) of the unvulcanized rubber 3 and the roll 2 is the range of 0-90 degrees.

  In the embodiment, the unvulcanized rubber 3 is supplied onto rolls 1 and 2 that are rotated at a constant speed. The unvulcanized rubber 3 is formed into a sheet shape on the supply rolls 1 and 2 so that a shearing force is input, that is, a kneaded state, and a new surface adheres to the roll 2 surface. The unvulcanized rubber sheet 3 attached to the surface of the roll 2 is sent out toward the guide roll 5 and further taken up by the take-up roll 6.

  As shown in FIG. 2, the unvulcanized rubber sheet 3 between the roll 2 and the guide roll 5 is guided in a tensioned state, and the feed speed of the unvulcanized rubber sheet 3 during this period is kept constant. 2, the angle between the rubber sheet 3 feeding direction B and the tangential direction A at the peeling point S where the rubber sheet 3 is separated from the roll 2, that is, the peeling angle θ is 90 ° or less.

  In the case of the kneaded rubber as in the present embodiment, it is practically preferable that the speed be in the range of 5 to 150 cm / s. In this embodiment, it is set to 14 cm / s. Moreover, the temperature at the time of peeling, ie, the surface temperature of the roll 2, is preferably in the range of 30 to 200 ° C, and particularly preferably in the range of 50 to 150 ° C. When the temperature of the roll 2 exceeds the above range, the rubber viscosity is lowered and the conveyance becomes difficult. Further, when the temperature of the roll 2 is less than the above range, it is difficult to accurately measure the rubber adhesive force. In this embodiment, the temperature of the roll 2 is set to 90 ° C.

  A rotation torque detector 4 is attached to the guide roll 5, and the detector 4 detects a torque (N · m) when the rubber sheet feed speed is kept constant. Such a value can indirectly indicate the value of the adhesive strength with the rubber sheet 3. That is, the torque value (N · m) of the width 50 mm of the rubber sheet 3 to be used is obtained, and from this value, per unit width of the rubber sheet at a constant feed speed when the surface temperature and physical properties of the roll 2 are constant. The adhesive strength (N / mm) can be obtained.

  Further, the rubber sheet 3 is not tensioned between the guide roll 5 and the take-up roll 6. This is because the rotational torque at the guide roll 5 is accurately measured.

In the adhesive force measuring apparatus of the present invention configured as described above, an unvulcanized rubber material 3 is attached to the roll 2 and then a force necessary to peel the unvulcanized rubber sheet 3 from the roll 2 is detected. ing.
Further, a shearing force is applied to the unvulcanized rubber material 3 so that the unvulcanized rubber material 3 is adhered to the roll 2 as an adherend in a kneaded state. This is because the surface of the unvulcanized rubber 3 is adhered to the surface of the roll 2 in the physical property state of the entire rubber material without being contaminated and changed by the outside air, etc. Can be shown accurately.

  FIG. 3 shows the adhesive force of the rubber sheet 3 itself (N: the value of the rubber sheet width itself) obtained from the measured rotational torque (N · m) of the guide roll on the rubber sheet 3 and the value of the guide roll diameter. It is a relationship graph of measurement time (unit: second). In the present embodiment, the average adhesive strength was 0.61 N and the maximum adhesive strength was 0.83 N within the above measurement time, indicating a value with little variation.

  In the present embodiment, it is possible to evaluate the speed dependency of the adhesive force of the material to be measured by changing the rotation speed of the guide roll 5 and the rotation speed of the rolls 1 and 2. Further, by changing the roll, it is possible to measure the adhesive strength with various surface properties.

  The adhesive force measuring device of the present invention has high industrial applicability and can easily and accurately measure adhesive force.

FIG. 1 is a schematic diagram of an adhesive force measuring apparatus according to the present invention. FIG. 2 is an enlarged view in P of FIG. 1 showing an angle when a material to be measured (rubber sheet) is peeled from a roll as an adherend. FIG. 3 is a graph showing the relationship between the adhesive force (peeling force) and time by the adhesive force measuring device of the present invention.

Claims (6)

  In an apparatus for measuring the adhesive force of a material to be measured by attaching a material to be measured to a predetermined adherend and detecting the force required to peel the material to be measured from the adherend, the material to be measured is: An adhesive force measuring apparatus that adheres to an adherend in a state of being sheared.   2. The adhesive force measuring device according to claim 1, wherein the material to be measured is a rubber material.   The pressure-sensitive adhesive force measuring apparatus according to claim 2, wherein the rubber material is sheared and input by kneading the rubber material on a roll and directly adhering to the roll.   The adhesive force measuring device according to any one of claims 1 to 3, wherein a peel angle between the material to be measured and the adherend is in a range of 0 to 90 °.   A guide roll is provided that guides the rubber material that has been peeled off from the adherend roll surface in a predetermined direction B, and the torque of the guide roll is measured to peel the rubber material from the adherend. The adhesive force measuring apparatus according to claim 3, wherein a necessary force is detected.   The pressure-sensitive adhesive force measuring apparatus according to any one of claims 1 to 5, wherein a temperature at the time of peeling the material to be measured from the adherend is in a range of 30 to 200 ° C.

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