JPS6281473A - Pressure-sensitive tape having perforations, its production and device therefore - Google Patents

Abstract

PURPOSE:To obtain the titled adhesive tape which can be cut into a predetermined length without any tool, by intermittently and rotatively moving a rolled pressure-sensitive tape at intervals of predetermined angles and exposing the tape to a laser beam during stop to form linearly arranged spot-like perforations. CONSTITUTION:A pressure-sensitive tape 20 as rolled is closely and linearly arranged into a cylindrical shape. The tape is intermittently exposed to a laser beam 5 while a generator 1 is moved from one end to the other end of the tape to perforate the portions exposed to the laser beam 5, thereby forming perforations 30 on the tape 20. The tape 20 is rotatively moved with a drive motor 23 by a central angle corresponding to the length of the outer periphery which corresponds to the desired cutting length. Perforations 30 are formed in the same manner as mentioned above and these procedures are repeated over the entire periphery of the roll.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention provides perforated adhesives such as ゝO/゛7'''-'0 8E adhesive 7-7' in order to achieve all the benefits of use. This is related to.

Background of the invention: Rolled pressure-sensitive adhesive tapes, which are made by coating a base film with pressure-sensitive adhesives like cellophane tape, include printed tapes with marks printed on them, double-sided adhesive tapes convenient for joining, etc.
There are matte acetate tapes that can be written on, trafting tapes, packaging tapes based on kraft paper, cloth, and tapes based on light alloys. Since the pressure-sensitive adhesive tape of Toru et al. is easier to use than push pins or string hooks, it is widely used in homes, businesses, etc., and is consumed in large quantities.

Problems that need to be solved: Because the base substrate of these pressure-sensitive adhesive tapes has high toughness, even when trying to cut the tape to the required length, the tape often stretches in the length direction or tears in the diagonal direction. It was difficult to amputate using only the fingers. Therefore, it is used by attaching it to a roll holder with a specific cutting blade, or it is cut to the required length with a separate blade and then affixed to the target area.On the other hand, if a tape or sheet is required It is well known that cutting along the line can be done smoothly and easily if perforations are made in advance. This perforation is constructed using a punching machine or a hammer like a Thomson type.
A lot of it is done by mechanical means. However, pressure-sensitive adhesive tapes are made by coating a base film with a tacky pressure-sensitive adhesive, so when using the mechanical method described above, the adhesive sticks to the puncture mechanism and creates a large resistance, especially when a large number of tapes are used. It was impossible to form perforations in these while they were still stacked.

Purpose of the invention: In view of the current situation, the present invention has been made to solve all of the above problems. The aim is to provide a pressure-sensitive adhesive tape that can be used without losing its inherent properties and can be used in so-called "Fun-touch" applications. Another object of the present invention is to provide a method for manufacturing a pressure-sensitive adhesive tape as described above, and a final object is to provide a manufacturing apparatus based on this method.

Structure/Embodiment of the Invention: Hereinafter, one embodiment of the present invention will be described based on the drawings. The pressure-sensitive adhesive tape holder of the present invention has perforations formed by a laser beam. Drilling with a laser beam is
Unlike the case using mechanical means, it is possible to perforate C perforations in a roll tape that is wrapped around a paper tube.

That is, as shown in FIG.
are closely arranged in a single cylindrical body, and power is transmitted from the drive motor (as appropriate). Then, the pressure-sensitive adhesive tapes arranged in sequence are set to rotate intermittently by an angle corresponding to the desired perforation interval under the operation control of the drive motor (a). Closely arranged pressure sensitive adhesive tape (
A horizontal movement rail (3) parallel to the axis of the tape permuted time body is installed above (b), and the power source (2) and laser oscillator (1) are installed on this rail. Lateral movement rail (3)
A rack, a ball screw, a linear motor, etc. can be applied, and in connection with this, the power source (2) and the laser oscillator (3) are oiled on a lateral movement rail, allowing reciprocating movement (c).

By using such a device, the rolled pressure sensitive adhesive tape (7) is closely arranged in a cylindrical shape, and the laser oscillator (1) is intermittently irradiated with the laser beam (5). k When it is moved laterally from one end to the other, the area irradiated with the laser beam (5) is perforated at points, and perforations (G) are formed in the pressure-sensitive adhesive tape (A).

Next, the pressure-sensitive contact tape (1) is rotated by the drive motor @ by a central angle corresponding to the outer circumferential length corresponding to the desired cutting length. Then, the laser beam (5
) When the laser oscillator (1) is moved laterally from all other ends to one end or from one end to the other while irradiating intermittently, the perforations (1
) is formed. After that, the reciprocating motion (c) of the laser oscillator (1) that irradiates the entire radar beam (5) intermittently, and the close
io in which permuted pressure-sensitive adhesive tapes rotate by a predetermined angle
By repeating the above-mentioned behavior in conjunction with the one-turn motion (a), perforations that cross the pressure-sensitive adhesive tape are created at required locations over the entire circumference of the roll, as shown in Figures 3 and 4. It can be formed as shown in .

When forming perforations (to), in the case of commercially available cellophane adhesive tape, the laser power is only a few degrees (4 degrees), and if the laser power is several degrees, a small one that can seal the oscillation gas can be used. It is an advantage of the present invention that the following can be used.

Regarding the distance between perforations, refer to the laser oscillator (1)
Adjustment is possible by synchronizing the lateral movement speed of the laser beam and the intermittent irradiation of the radar beam (5). Specifically, the laser oscillates in pulses, that is, the ON and OFF states of the laser oscillation are repeated, and the ON time, OFF time, and laser oscillator (1)
Adjust the timing with the lateral movement time. Further, as illustrated in FIG. 1 or FIG. 2, a mechanical shutter (6) can also be used. In this example, a laser oscillator (
1), a mechanical shutter (
6) Completely installed step motor (4) Completely installed.

As shown in FIG. 2, the mechanical shutter (6) is a disk body with a rotating shutter (7) in the center, and has radial slits (8). In other words, the laser oscillator (1
) generates continuous oscillation, rotates the shutter, and adjusts the timing of each element, such as the shape and arrangement of the slit, the rotation speed of the step motor (4), and the lateral movement time of the laser oscillator (1).

An example of a mechanism for tightly arranging the pressure-sensitive adhesive tape (A) on a roll of pressure-sensitive adhesive tape and intermittently rotating the tape at each angle of rotation is shown in FIGS. 3 and 4. In this embodiment, the structure c2υ includes a plurality of bearing rollers on which pressure-sensitive adhesive tapes are placed and a plurality of pressure-sensitive adhesive tapes cIQ1! r[
A driving pressure plate and a driven pressure plate are provided which are arranged in tandem and rotated intermittently at the same time. The driven pressure plate (to) is the telescopic shaft (to)
The four groups of pressure-sensitive adhesive tapes are held in a cylindrical shape and are movably supported by pivot bearings. Further, the driving pressure plate (2) gives the required intermittent rotation to the driving motor (2). Regardless of the diameter of the roll of pressure-sensitive adhesive tape (4), it can be aligned with the rotation axis using the vertical adjuster (to), and the horizontal adjuster (to) allows the pressure-sensitive adhesive tape (a) to be closely arranged to be more or less aligned with the rotation axis. This can be handled by

Functions and Effects of the Invention: The pressure-sensitive adhesive tape according to the second aspect of the present invention can form perforations in a rolled state, and exhibits excellent productivity. The pitch of the perforations in ordinary cellophane adhesive tape is approximately 92 inches when it is nearing the end of use compared to the pitch at the beginning of use. It won't happen.

Additionally, the base film of the pressure sensitive adhesive tape is perforated by a laser beam, and the perforations formed are permanent. However, in the case of tacky pressure-sensitive adhesives applied to the base film, the perforations created by the laser beam over time cause synthetic resin-based properties to ooze out from the inner periphery that defines the perforation, causing them to overlap with each other. This leads to the production of the retinal body.

This retinal body exhibits the effect of inhibiting air permeability or water permeability in the interstices depending on its characteristics. Therefore, the pressure-sensitive adhesive tape with perforations of the present invention is easy to cut at the perforations and can be used with one touch, and also has the above-mentioned effects, and has great industrial applicability.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one example of implementation of the present invention. fA
Fig. 2 is a plan view of the mechanical shutter shown in Fig. 1, Fig. 3 is a front view of an example of the mechanism for rotating the pressure-sensitive adhesive tape included in Fig. 1, and Fig. 4 is a plan view of the mechanical shutter shown in Fig. 3. An IV-IV side view is shown. (1)... Laser oscillator (2)... Power supply (3)
... Lateral rail (4) ... Step motor (5)
... Laser beam (6) - ... Mechanical shutter (7) ... Rotating shaft (8) ... Slit (
e)...Pressure sensitive adhesive tape eρ...For the structure)...
Supporting roller (c)... Drive motor ■... Drive pressure plate)... Driven pressure plate)... Telescopic shaft @... Pivot bearing)... Lifting adjuster Wing... Horizontal adjuster... ...Perforation■...Reciprocating movement (f)...-Dynamic movement Fig. 1 Fig. 4

Claims (1)

[Scope of Claims] 1. A pressure-sensitive adhesive tape formed by applying a pressure-sensitive adhesive to a base film made of an appropriate material, in which perforations are perforated in an angular direction intersecting the longitudinal direction of the base film. . 2 Pressure-sensitive adhesive tape is supported in a rolled state in a pressure-contact sequence, rotated intermittently at angles such that the outer periphery of the roll reaches a predetermined dimension, and is intermittently irradiated with a laser beam while this intermittent rotation is stopped. A method for producing a pressure-sensitive adhesive tape having perforations, characterized in that perforations are formed by moving in the direction of the bearing axis while forming perforations. 3. A support roller that rotatably supports a roll of pressure-sensitive adhesive tape and a pressure plate that rotates the pressure-sensitive adhesive tape by a fixed angle with a closely arranged cylindrical body are provided on the structure, and a horizontal movement plate is provided above the support roller. A structure in which a rail is constructed, and a laser oscillator that moves laterally along the transversely moving rail and intermittently irradiates a laser beam toward the pressure-sensitive adhesive tape is installed,
A manufacturing device for pressure-sensitive adhesive tape having perforations, characterized in that the rotation of the pressure-sensitive adhesive tape and the lateral movement of a laser oscillator are configured to be synchronized.