JPH0592862A - Winding device for adhesive tape - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a pressure-sensitive adhesive tape winding device capable of reducing the deploying force of the pressure-sensitive adhesive tape, that is, imparting easy peelability, with a simple and inexpensive structure. With the goal. [Structure] Adhesive tape-like body 1 delivered from a delivery means
The buff body 5c of the buff roll 5 rolls on the back surface of the adhesive tape-like body 1 before being wound up by the winding means. Thereby, the back surface of the base material of the adhesive tape-shaped body 1 and the buff body 5
Sliding friction is generated between the pressure sensitive adhesive tape 1 and c, and a shearing force due to sliding friction acts on the back surface of the pressure-sensitive adhesive tape-shaped body 1 to cause changes in the surface state such as minute unevenness changes and crystal form changes. The surface state change does not hinder the winding of the wound body while winding the wound body, and facilitates separation from the adhesive when the wound body is unwound. When the ability to apply the shearing force decreases, replace it with a separately prepared buff roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for winding an adhesive tape or an adhesive sheet (herein referred to as "adhesive tape-shaped body") into a wound body.

[0002]

2. Description of the Related Art An adhesive tape-like body has an adhesive coated on one side of a base material, and its product form is generally a wound body wound in a coil around a core material. is there. In this case, at the time of winding, the pressure-sensitive adhesive on one side adheres to the other side (back side) with a relatively strong adhesive force.

Therefore, at the time of rewinding the wound body during use, a strong rewinding force against the above-mentioned adhesive force is required, so that the adhesive may remain on the back surface side of the base material of the adhesive tape-like body. , Blocking of the pressure-sensitive adhesive, layer cracks on the back surface of the substrate, and the like occur.

Therefore, conventionally, a means for solving such a problem at the time of rewinding, that is, a so-called releasing treatment for reducing the rewinding force (deployment force) of the pressure-sensitive adhesive tape-like body, in other words, for providing easy peeling property As a means, a method of applying a release agent to form a thin release layer on the back surface of the pressure-sensitive adhesive tape-like body is known.

[0005]

However, in the method of applying the above-mentioned mold release agent, as the material of the mold release agent, it firmly adheres to the back surface of the substrate and easily adheres to the adhesive. It is difficult to select a release agent because it is required to have the antinomy property of being separated, and an expensive material such as a linear alkyl group-containing polymer, a silicone-based polymer, a perfluoro-based polymer is required, and a complicated coating is required. It requires a work process. Therefore, while such a method controls the cost of the entire product, the release agent applied to the roll body at a bending angle is transferred to the pressure-sensitive adhesive to cause a decrease in the pressure-sensitive adhesive strength of the pressure-sensitive adhesive.

Incidentally, Japanese Patent Application Laid-Open No. 61-103975 discloses a method for laminating a pressure-sensitive adhesive layer on a base material layer at the same time by using a co-extrusion method although it is a surface protective film. However, even in such a method, since it is necessary to perform a mold release treatment on the back surface of the base material layer, there are the same problems as in the coating method of the above-mentioned mold release agent, and there is a time constraint during the execution of the mold release treatment. Therefore, the problem is even greater.

The present invention has been made to solve the above-mentioned conventional problems, and by the addition of simple mechanical means,
The present invention relates to a pressure-sensitive adhesive tape winding device capable of reducing the spreading force of the pressure-sensitive adhesive tape, that is, imparting easy peeling property.

[0008]

In order to achieve the above object, the invention of claim 1 is for delivering an adhesive tape-shaped body having an adhesive coated on one surface side in the longitudinal direction of the adhesive tape-shaped body. And a take-up device for taking up the adhesive tape around the core material in the form of a roll, in a device for taking up the adhesive tape-like body, wherein the take-up device and the take-up device rotate. A shaft body is provided, and a cylindrical buff body mounted on the outer peripheral portion of the rotary shaft body and contacting the other surface side of the adhesive tape-shaped body in a rolling contact state is replaceably provided.

[0009]

[Advantage] The adhesive tape-like body fed from the feeding means is
Before being wound by the winding means, a tubular buff body rolls on the back surface of the adhesive tape body. This causes sliding friction between the back surface of the base material and the buff body, and a shearing force due to sliding friction acts on the back surface of the adhesive tape-like body,
A change in surface condition such as a minute unevenness change or a crystal morphology change occurs. The change in the surface state does not hinder the winding of the wound body at the time of winding, and facilitates the separation from the adhesive at the time of rewinding. When the ability to apply the shearing force decreases, replace it with a separately prepared baffle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the overall construction of a winding device according to the present invention. As shown in the figure, the adhesive tape-like body 1 fed out from the adhesive applying step (not shown) serving as the delivery means is guided with the upper side of the figure as the back side and the lower side of the figure as the coated side of the adhesive. It is designed to run toward the roll 2.

A tension roll 3 is provided on the downstream side of the guide roll 2, and a receiving roll 4 and a buff roll 5 are provided on the downstream side of the tension roll 3 so that their roll surfaces are in contact with each other. There is. Further, a tensioning roll 6 and a pair of pinch rolls 7 and 8 are provided on the downstream side of the both rolls 4 and 5 in that order, and the adhesive tape shape is provided on the downstream side of the pinch rolls 7 and 8. A winding core material (not shown) serving as a winding means is provided to make the body 1 a wound body.

Here, the base material of the adhesive tape-shaped body 1 is
For example, a resin made of polyethylene resin and having a thickness of 60 μm is used.
Hydrogenated product of butadiene / styrene block copolymer 1
A pressure-sensitive adhesive layer is formed by applying a pressure-sensitive adhesive liquid which is a homogeneous solution of a mixture of 00 parts by weight and 40 parts by weight of a tackifying resin in toluene. The take-up core material is made of, for example, a paper core having an inner diameter of 3 inches.

The adhesive tape-shaped body 1 is, for example, 2
The baffle 5 travels in the longitudinal direction at a speed (line speed) of 0 m / sec, and the baffle roll 5 is set to rotate at a peripheral speed (roll speed) of 90 m / sec, for example.
The rotating direction of the baffle 5 is the adhesive tape-like body 1.
Is the opposite direction to the running direction of.

FIG. 2 shows a more detailed structure of the buff roll 5, which comprises a rotary shaft 5a,
Cylindrical body 5b, cylindrical buff body 5c, and a pair of flanges 5d
Consists of. Here, the tubular buff body 5c is formed by attaching a cloth sheet-shaped buff to the outer peripheral portion of the tubular body 5b via an appropriate adhesive.

The rotary shaft 5a is inserted into the cylindrical body 5b. Flange 5d is fitted into both ends of the rotary shaft 5a, and both flanges 5d are fixed to both ends of the tubular body 5b via screws. The flange 5d
Has a maximum outer diameter substantially the same as the maximum outer diameter of the cylindrical buff body 5c.

Next, the operation of this embodiment constructed as described above will be explained. The pressure-sensitive adhesive tape-shaped body 1 whose one surface side is coated with the pressure-sensitive adhesive in the pressure-sensitive adhesive coating step passes between the receiving roll 4 and the buff roll 5 via the guide roll 2 and the tension roll 3. At the time of this passage, the roll surface of the rotating baffle roll 5 comes into contact with the back surface of the pressure-sensitive adhesive tape-like body 1, so that a sliding friction force acts on the back surface, and the sliding friction force acts as a shearing force. The surface state of the base material of the sheet 1 is changed, that is, at least one of the surface morphology and the crystal morphology is changed.

In this case, the shearing force is mainly determined by the rotating force of the tension rolls 3 and 6 and the buff roll 5, and is, for example, 3 to 20 Kg / cm ² , more preferably 5 to 5.
It is preferably in the range of 15 Kg / cm ² .

The adhesive tape-shaped body 1 to which the shearing force is applied by the buff roll 5 passes between the pinch rolls 7 and 8 and then is wound on a paper core (not shown) to form a wound body. Even if the baffle 5 comes into contact with the back surface of the pressure-sensitive adhesive tape-shaped body 1, no significant separation of the buff fiber of the buffolol 5 or deformation or damage of the base material of the pressure-sensitive adhesive tape-shaped body 1 occurs.

Table 1 shows the results of measurement of the deployment force and the initial adhesive force of the roll under various curing conditions of the roll, and as a comparative example with the roll according to the present embodiment, a winding device not using the baffle roll 5 is shown. It is shown in comparison with the wound body formed by.

Here, the expansion force is 30 m / sec.
The force required to rewind the pressure-sensitive adhesive tape-like body from the roll at a speed of g is a value converted into g / 50 mm width, and the initial adhesive force is the pressure-sensitive adhesive sheet-like body rewound from the roll, Attach it to a stainless steel plate specified in JIS Z0237 with a laminator, leave it at 23 ° C for 30 minutes, and then 300 ° C at 23 ° C.
It is a value obtained by converting the force required for peeling at a speed of mm / min and at an angle of 180 degrees into a width of g / 50 mm.

From the results shown in Table 1, in the case of the wound body according to this embodiment, the deploying force is 1/5 to 1/7 that of the comparative example.
It can be understood that the initial adhesive strength is also small.

[0022]

[Table 1]

In Table 1, * 1 indicates that the adhesive tape-like material is elongated, and * 2 indicates that the rewinding is impossible and the measurement is impossible.

[0024]

As described above, according to the first aspect of the invention, there is provided a delivery means for delivering the adhesive tape-shaped body having one surface coated with the adhesive in the longitudinal direction of the adhesive tape-shaped body. ,
In an apparatus for winding an adhesive tape-shaped body, which comprises a winding means for winding the adhesive tape-shaped body around a core material in a wound body shape, a rotary shaft body is provided between the feeding means and the winding means. Provided,
A cylindrical buff body mounted on the outer peripheral portion of the rotary shaft body and contacting the other surface side of the adhesive tape-shaped body in a rolling contact state is replaceably provided, which is expensive and troublesome to handle. By using a tubular buff that has a simple structure and does not require a separate release agent, the deployment force can be easily reduced, contributing to a reduction in the product price of an adhesive tape-shaped roll. it can.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an overall configuration of a winding device according to the present invention.

FIG. 2 is an exploded perspective view showing a mounted state of a tubular buff body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive tape-like body, 5 Buff roll, 5a Rotating shaft (rotating shaft), 5b Cylindrical body (rotating shaft), 5c Buff body.

Claims (1)

[Claims] 1. A delivery means for delivering an adhesive tape-shaped body coated with an adhesive on one surface side in the longitudinal direction of the adhesive tape-shaped body, and the adhesive tape-shaped body wound around a core material in the form of a wound body. In a winding device for an adhesive tape-shaped body, which comprises a winding means for winding, a rotary shaft body is provided between the feeding means and the winding means, and the rotary shaft body is mounted on an outer peripheral portion of the rotary shaft body. An apparatus for winding an adhesive tape-like body, wherein a cylindrical buff body that comes into contact with the other surface of the adhesive tape-like body in a rolling contact state is provided in a replaceable manner.