JPS634531Y2 - - Google Patents

Description

[Detailed description of the invention] Currently, various adhesive tapes made by wrapping a continuous length of adhesive tape around a core such as a paper tube, such as Sellotape, electrical vinyl tape, packing tape, etc., are widely used in various fields. ing.

However, in this adhesive tape, the tabs on both sides are exposed during the cutting or winding process, that is, the adhesive layer is exposed between the layers on both sides of the tape. Because of this, dirt and grime tend to adhere to the adhesive part, and when a dirty tape is used, dust and dirt will continue to adhere to both sides of the tape, making it extremely unsightly and making it difficult to adhere to the object to be bonded. It has the disadvantage of staining the surface.

Furthermore, as the adhesive tape ages over the years since its manufacture, the adhesive deteriorates and oozes from the edges, resulting in a sticky state and poor finish.

In the past, nothing has been done to treat the ears, other than pasting circular sheets cut out from plastic film, paraffin paper, etc. into donut shapes.

On the other hand, recently, inks made of UV-sensitive resins (e.g., acrylate photosensitive resins) that are cured (dry-cured) in an extremely short period of time only by irradiation with high-pressure ultraviolet rays of 2300A° to 3000A°, Paints (eg UV inks or UV varnishes) have begun to be used.

The present invention has been made in view of the above circumstances, and the above-mentioned ultraviolet-sensitive resin ink or paint (an example of the ink or paint is UV varnish) is applied to both sides 1, 1 of various adhesive tapes. (hereinafter referred to only as UV varnish), coating devices B and B' having a configuration similar to an offset printing machine,
The adhesive tape A is passed between the UV irradiation device C equipped with an UV lamp, which irradiates the coated surface with UV rays to cure the UV varnish and form a coating, and the coating devices B and B' and inside the UV irradiation device C. Relating to a device consisting of a chute that rolls down in a line,
In addition, by forming a UV varnish coating on both ear surfaces 1, 1 of the adhesive tape to eliminate the above-mentioned drawbacks of exposing the ears, and at the same time, by using this device, adhesive tape It is characterized by being able to form a film automatically and with extremely high efficiency.

To explain a specific embodiment of the present device, a pair of coating devices B and B' each consisting of a plurality of vertically installed kneading rollers 3 and transfer coating rollers 4 are placed opposite each other on the left and right sides of a suitable machine base 2. and both devices B,
A gap is provided between the transfer coating rollers 4 and 4 of B' so that the adhesive tape A can pass therethrough, and the gap is adjustable depending on the width (thickness) of the adhesive tape A. A light-shielding housing 5 is installed at the rear of the housing 5 to prevent ultraviolet rays from leaking to the outside, and high-pressure ultraviolet lamps 6, 6 are installed in the housing 5 to provide an ultraviolet irradiation device C. The chute 7 to be coated is connected to the coating device B,
Installed between B' and through the ultraviolet irradiation device C,
A plurality of adhesive tapes A are placed on the chute 7 in a line so as to roll down under their own weight.

In the above configuration, when the coating devices B and B' are operated while appropriately supplying UV varnish and the high-pressure ultraviolet lamp 6 is turned on, the adhesive tape A, which rolls down in a line under its own weight on the chute 7, is coated one after another. device B,
It is sandwiched between the transfer coating rollers 4, 4 of B', is fed by the rotation of the rollers 4, 4, passes through, and is coated with UV varnish 8 on the entire surface of both ear parts 1, 1,
The applied adhesive tape A is fed in a line into the light-shielding housing 5 of the ultraviolet irradiation device C, and while passing through the device C, it is sufficiently irradiated with high-pressure ultraviolet rays so that both ear parts 1, The UV varnish 8 of No. 1 is cured to form a coating 9, which is sent out of the apparatus C.

Note that it is preferable to use, for example, a translucent and fluid OP varnish (overprint varnish) as the UV varnish, since the formed coating 9 will be transparent and the finish will be natural.

As described above, the device of the present invention can form a film that covers both sides of the adhesive tape, thereby eliminating the conventional drawback of leaving the ears exposed, and can also be applied using a coating device similar to a printing machine. After coating, the coating is cured by irradiation with ultraviolet rays to form a coating, which has the advantage that coatings can be automatically and efficiently formed on a large number of adhesive tapes.

In addition, since the applied UV-sensitive resin is cured as it is and becomes a film, it is formed to fit well on the ear surface and unlike conventional circular sheets, it does not peel off easily. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a schematic configuration of one embodiment of the device of the present invention, Fig. 2 is a front view thereof, and Fig. 3 is a front view of an adhesive tape with an ultraviolet-sensitive resin coating formed on both ears by the device of the present invention. Figure and a partially enlarged sectional view thereof. Code, A... Adhesive tape, B, B'... Coating device, C... Ultraviolet irradiation device, 1... Ear surface, 2...
... Machine stand, 3 ... Kneading roller, 4 ... Transfer coating roller, 5 ... Light-shielding housing, 6 ... High-pressure ultraviolet lamp, 7 ... Chute, 8 ... UV varnish (ultraviolet-sensitive resin), 9 ... Coating.

Claims (1)

[Scope of utility model registration request] A pair of coating devices B and B' consisting of a plurality of vertically installed kneading rollers 3 and transfer coating rollers 4 are placed opposite each other on the left and right sides of a suitable machine stand, and between the transfer coating rollers 4 and 4 there is an adhesive coating. An ultraviolet irradiation device C is provided by providing an interval through which the tape A can pass, and adjusting the interval to be wide or narrow, and installing a high-pressure ultraviolet lamp 6 in a light-shielding housing 5 installed behind the coating devices B and B'. Further, a chute 7 for rolling down the adhesive tape A was installed between the coating devices B and B' and through the ultraviolet irradiation device C, and a plurality of adhesive tapes A were placed in a line on the chute 7. , a device that forms a UV-sensitive resin coating on both sides of an adhesive tape.