JPS62267646A - Method and device for measuring rolling type adhesive strength - Google Patents

Abstract

PURPOSE:To universally determine adhesive strength of a test tape by pressing rotary rollers of various materials against the test tape for measuring the adhesive strength, and subsequently, separating them, and measuring a relative tractive force of the moment both are separated, by a parallel spring. CONSTITUTION:A test tape 17 is fixed firmly onto the periphery of a drum 1. A roller 2 is placed on an adhesive surface of the tape, and a load 3 is placed on a rack base 4 as necessary. In case the upward force for separating the roller from the tape is not applied in the course of a test of adhesive strength, a load is applied suitably to a weight hook 15. Subsequently, a motor 16 is operated and the drum 1 is rotated in the direction as indicated with an arrow. The roller 2 is drawn in the direction as indicated with an arrow by the adhesive action of the tape on the drum, the lower end of a parallel spring 6 is drawn to the right through a balance rod 18, and the spring is distorted. This distortion amount is measured by an electric micrometer 10 which is placed against a cover plate 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The characteristic called tack of an adhesive tape is the adhesive force when the adhesive tape is pressed lightly and for a short period of time to an object to be adhered, and is also called initial adhesive force.

Currently, the measurement of this initial adhesive force is specified by JIS, and is carried out by a ball rolling method in which a steel ball is rolled on an adhesive tape-H attached to an inclined surface.

The 41 constant value obtained by this ball rolling method does not have the dimension of adhesive force, so it has drawbacks such as the inability to know the specific characteristics of the adhesive tape. The finger tuck method is widely used in industry. This method involves pressing a finger against the adhesive tape and then releasing it to find the peeling resistance value sensually and sensually, and it is clearly lacking in precision and is difficult to specify industrially. It is elegant.

The present invention solves the drawbacks of conventional ball rolling methods, and
This paper describes a measurement method designed to accurately obtain specific adhesive properties obtained from the tack measurement method and its nine challenges.

In the present invention, a rotating roller made of various materials is pressed against a sample tape whose adhesive strength is to be measured, and then the sample tape and roller are relatively separated, and the relative traction force at the moment when they are separated is measured using a parallel spring. This is determined as the adhesive strength of the sample tape. The pressing force of the rotating roller can be changed freely, and if necessary, it is also possible to apply a negative load using this principle. The adhesive force can be determined by multiplying the amount of deformation of the parallel spring connected to the rotating roller by the spring constant.

Preferred embodiments of the invention will be described below in conjunction with the accompanying drawings.

First, to describe the configuration of the rolling type adhesive force measuring device according to the present invention, there is a tape applying drum 1 and a motor 16 at one end on one unit 14, and a sample tape 17 is placed on the circumference of this drum with an adhesive surface. A pillar 12 is provided at the other end of the pedestal, which is mounted upside down, and a rectangular support part 13 is provided on the top of the pillar 12.
This supporting part together with the parallel rectangular body 7 supports two micrometers 1.
0.11 is supported. At the lower end of the rectangular body 7 having two parallel springs 6 is a ball support 9, in which a ball 8 is held. A balance bar 18 passes through this ball, so that the balance bar can move in all directions.

A roller with a load frame 4 is provided at the front end of the balance beam 10, and this roller is used to hold the sample tape 1 on the drum.
7 is placed in contact. The rotation axes of the drum and roller are on the same vertical line. The contact force, that is, the pressing force between the sample tape and the roller can be adjusted by appropriately loading the weight 3 on the load frame.

Furthermore, by applying an appropriate load to the weight hanger 15 at the rear end of the balance rod, it is possible to apply the above-mentioned contact force, that is, a force that separates the two.

Next, the rolling-type adhesive strength measuring method of the present invention will be explained according to a specific example shown in the drawings.

First, the sample tape 17 is firmly fixed on the circumference of the drum 1. A roller 2 is placed on the adhesive surface of the tape, and a load 3 is placed on a pedestal 4 as required. If no upward force is applied to the roller 2 to separate it from the tape during the adhesion test, an appropriate load is applied to the weight hanger 15. This completes the test preparation.

The motor 16 is operated to rotate the drum 1 in the direction of the arrow. The rotational speed shall be moderate to the extent that it does not affect the test results. The roller 2 is pulled in the direction of the arrow by the adhesive action of the tape on the drum, and the lower end of the parallel spring 6 is pulled to the right in the figure via the balance rod 18, causing the spring to become distorted. This amount of distortion is measured by an electric micrometer 10 applied to the caul plate 14. Note that the initial state of the parallel rectangular body, that is, the zero point, is set by the micrometer 11.

Since it is essential that the balance bar 18 be in a horizontal state during the test, if the diameter of the tape application drum 1 changes, an appropriate mechanism (not shown) is used to adjust the vertical position of the barbarian rectangle 7 accordingly. I have to change my position. Tests can be conducted by changing the condition or material of the circumferential surface of the roller 2.

[Brief explanation of the drawing]

The attached drawing is a perspective view showing a specific example of the present invention. 1.00. Knee IP day F7 + V two nori, +0. l-
1-2 〇,--Parallel spring, 8...Ball, 18
...Dedicated to balance. 15... Weight hanging.

Claims (2)

[Claims] (1) fixing the tape on the circumference of the drum with its adhesive side facing up; placing a roller on this adhesive surface; applying a load to the roller directly or using a lever principle;
The step of slowly rotating the drum to pull the roller in one direction, the step of transmitting this traction force to the parallel rectangular body through the ball to deform the parallel spring of the rectangular body, and measuring the amount of deformation to determine the adhesion of the tape. A rolling adhesive force measurement method consisting of the step of quantifying force. (2) a drum having a circumferential surface to which the test tape is attached;
A roller positioned so as to be in contact with the circumferential surface, a balance rod having a ball approximately in the center, a weight hook attached to the balance rod at the end opposite to the roller, and a parallel rectangular body with a parallel spring fixed to the ball. , a rolling adhesive force measuring device consisting of a measuring device that measures the amount of deformation of these parallel springs.