JPH03182578A - Equipment for manufacturing self-adhesive tape - Google Patents

Abstract

PURPOSE:To realize the coating with self-adhesives in two layers in one process line by a constitution wherein a means for unrolling a base sheet, first and second self-adhesive coaters, a means for transfer, and a means for rolling up a product base sheet are combined. CONSTITUTION:A base sheet S0 is unrolled by an unrolling means 1, coated with a second self-adhesive layer B by a first self-adhesive coater 2, and passed through a drier 3 to give a base sheet S1. The base sheet S1 is fed onto a transfer roll 4a of a transfer means 4, where the second self-adhesive layer B is transferred to a base sheet S2, coated with a first self-adhesive layer A, and fed onto a pressure roll 4b. The base sheet S0 which has reverted from the S1 state to the initial state as a result of the transfer is introduced into a second self-adhesive coater 5, where it is coated with the first self-adhesive layer A. The coated sheet is passed through a drier 6 to give a base sheet S2, which is fed onto a pressure roll 4b of the transfer means 4. The base sheet S2 having the second self-adhesive layer B transferred onto its first self-adhesive layer A is rolled up as a product base sheet S by a rolling up means 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to an adhesive tape manufacturing apparatus, particularly an adhesive tape manufacturing apparatus capable of transferring two layers of adhesive onto a base sheet (or film). .

(Prior Art) Conventionally, as a method for producing an adhesive tape by forming an adhesive layer on a base material, a direct coating method, a transfer coating method, etc. have been employed as well-known methods.

(Problem to be Solved by the Invention) However, all of these methods were configured to apply only one layer of adhesive on the base sheet, and there is a limit to the coating thickness. For example, if it is necessary to add special characteristics to the adhesive part of the tape (for example, by coating it thickly to give it cushioning properties, or by coating it partially in a predetermined pattern), Applying two coats in a separate process not only requires extra manufacturing costs, but also causes the adhesive of the first i@th coating to dry further.
There were problems such as the upper and lower layers having different viscosities, or the adhesive layer possibly changing in quality.

The present invention has been made in view of the problems of the conventional examples as described above.It is an object of the present invention to solve these problems and also to provide an adhesive tape manufacturing apparatus of this type that is capable of two-layer coating in a process line. The purpose is

[Means to solve the problem]

Therefore, in the present invention, the base sheet is comprised of an unwinding means for the base sheet, first and second adhesive coating means, a transfer means, and a product base sheet winding means, and the base sheet is The unwinding means, the first adhesive coating means, the transfer means, and the second adhesive coating means.

The above object is achieved by forming a process line in the order of the transfer means and the product base sheet winding means.

[Effect]

With the above-described device configuration, in the process line, the adhesive coated on the original base sheet by the first adhesive coating means is transferred onto another base sheet described later by the transfer means. After applying the adhesive as a first layer to this base sheet which has been restored to its original shape by using a second adhesive coating means, the adhesive is again applied onto the first layer at the transfer section. After the second layer is formed by transfer, the product base sheet is tied together and wound up, so that a desired two-layer adhesive tape can be manufactured in a process line.

〔Example〕

The invention will be described below based on examples.

FIG. 1 is a schematic diagram of the configuration of an embodiment of the adhesive tape manufacturing apparatus according to the present invention, and FIGS. The dimensions are exaggerated.

(Configuration) This device consists of an unwinding machine 1 for unwinding a base sheet (or film) So for adhesive tape products from a raw roll.
First and second adhesive coaters 2 and 5, each serving as an adhesive coating means, for applying an adhesive from each adhesive reservoir onto a base sheet via a coating roll, and their respective drying/reactions. It consists of a transfer machine 4 consisting of dryers 3 and 6 for curing, a transfer roll 4a and a pressure roll 4b, and a winding machine 7 for winding up the product base sheet S coated with two layers.

(Process/Operation) The base material sheet so unwound from the original roll of the unwinding machine 1 is first coated with a thick coat of the second layer B (see Fig. 2 (a) by the first adhesive coater 2). )) or coated with a predetermined patterned adhesive layer B (FIG. 2(b)), and supplied to the transfer roll 4a of the transfer machine 4 via the dryer 3 (the base sheet in this state is indicated by 81). The coated adhesive is applied to a base sheet S2 coated with a first layer A, which will be described later, which is supplied onto a pressure roll 4b disposed close to and parallel to the pressure roll 4b in the axial direction. It is transferred for the second layer B. Through this transfer, S,
The base sheet S0, which has returned to its original state, is guided to the second adhesive coater 5 via a plurality of guide rolls G, where it is coated with the adhesive of the first JILA, and dried/reacted in the dryer 6. After being cured (the base sheet in this state is shown as 82), it is again supplied onto the pressure roll 4b of the transfer machine 4, and this third! After the second layer B is transferred onto the layer A, it is wound up as a product base sheet S by a winding machine 7.

As described above, the desired two-layer adhesive tape can be manufactured on a process line at relatively high speed.

(Other Examples) It should be noted that the components/devices in the above embodiments are not necessarily limited to the illustrated examples, and may of course be other conventional components/devices. It is.

〔Effect of the invention〕

As explained above, according to the present invention, since the two-layer coated adhesive tape can be manufactured in a single process line that can operate at relatively high speed, various problems of the conventional example described above are solved, and It has become possible to manufacture this type of product in a cost-effective manner.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the configuration of an embodiment of an adhesive tape manufacturing apparatus according to the present invention, and FIG. 2(a). (b) is each cross-sectional view of two examples of two-layer coated adhesive tapes. 1... Unwinding machine 4 ------- Transfer machine 7... Winding machine O 1 2 S... Base sheet

Claims (1)

[Claims] It consists of an unwinding means for the base sheet, first and second adhesive coating means, a transfer means, and a product base sheet winding means, and the base sheet is An adhesive tape characterized in that a process line is formed in the order of the first adhesive coating means, the transfer means, the second adhesive coating means, the transfer means and the product base sheet winding means. Manufacturing equipment.