JPH02280752A - Connection of thin plate-shaped rubber thread having ribbon form - Google Patents

Abstract

PURPOSE:To fix the edge part of a ribbon-shaped rubber thread by rubber paste in simple and speedy manners by observing the behavior of the rubber paste applied at the edge part of the ribbor-shaped rubber thread and properly fixing each rubber thread of the ribbon-shaped rubber thread. CONSTITUTION:A cellophane tape 3 is attached onto one surface at the edge part of a ribbon- shaped rubber thread 2 which is formed by temporarily attaching four rubber threads 1, and after inclined surface 5 is formed by grinding the other surface on which the cellophane tape 3 is not attached so that the top edge 4 has a thin inclination. The inclined surface 5 is fixed onto a plate 6, setting the cellophane tape 3 on the underside. Then a cellophane tape 3' having the equal length is attached onto one surface of the edge part of a ribbon- shaped rubber thread 2' having the equal thickness and equal width, and an inclined surface 5' is formed by grinding the other surface. Then each inclined surface 5 of the both ribbon- shaped rubber threads 2 and 2' is coated with rubber paste, and the inclined surface 5' of the ribbon-shaped rubber thread 2' is superposed onto the inclined surface 5 and pressed a little, and then the rubber threads 2 and 2' are separated from the plate 6, and further, the cellophane tapes 3 and 3' on the both surfaces are exfoliated. Thus each rubber thread 11 to 14 is separated and the edge part of the rubber thread 1 having ribbon form is connected.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a thin plate-shaped rubber thread that is widely used for fixing to the opening of disposable diapers etc. to impart elasticity to the opening. This relates to the connection method.

(Prior Art) Thin rubber threads (hereinafter simply referred to as rubber threads), which are conventionally used to attach to the openings of disposable diapers to give elasticity to the openings, are made from natural rubber raw materials as appropriate. Make a thin sheet (approximately 0.2~Q, 5mm thick, depending on the purpose of use) from raw rubber made by vulcanization, and cut it through a cutter to the required width (approximately 0.3~3 mm depending on the purpose of use).
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After that, it is separated again into ribbon-like rubber threads of the required width and the number of rubber threads suitable for the purpose of use, and then supplied to customers.

Consumers impart elasticity to objects by separating each rubber thread from a ribbon-like rubber thread, holding it at a required gap while pulling it, and fixing it to the object with adhesive or the like.

The length of this ribbon-like rubber thread is approximately 4AQQm, so manufacturing machines that operate at high speed (for example, in the case of disposable diapers, there are some that granulate about 450 pieces per minute.The length of the opening is approximately If the speed is 1 m, then the speed is about 450 m/min), you will be using several pieces a day, and you will inevitably have to connect the ends during work.

The methods for connecting these ends are: ① Put both ends of the ribbon-shaped rubber thread together and firmly connect them with rubber glue, and then cut and separate each rubber thread with a suitable blade at the connected part, or ② Ribbon-shaped rubber thread. Separate the end of the ribbon-shaped rubber thread into each rubber thread, then firmly connect the rubber threads at both ends with rubber glue, or Separate the end of the ribbon-shaped rubber thread into each rubber thread, then connect each rubber thread at both ends. It's about tying the thread.

(Problem to be Solved by the Invention) In the above connection method, in the case of (3), considerable skill is required to cut and separate each rubber thread at the connected part with an appropriate blade, and in case the rubber thread is damaged, If you attach the Aligning and firmly connecting them so that they are of the same length is a fairly troublesome operation, and as in the case of ■, it takes a considerable amount of time. Since the knot must be cut at that point, it must be tied into a small knot, but this connection operation also has the drawback of requiring a considerable amount of time.

Narrow rubber threads are often used in the manufacture of disposable diapers, and the width is often less than 1.5 mm. However, with this narrow width, the connection methods described in ■ and ■ above are extremely time consuming. It relies exclusively on the ■ connection method.

However, for wide items with a width of 1.5 mm or more, especially at the top, the connection method described in (■) will result in a large knot, which will often cause problems during work.
Therefore, there is a strong desire to shorten the connection process, as the time required for connection leads to reduced production.

(Means for Solving the Problems) The present invention has been made by focusing on such conventional problems, and by observing the behavior of rubber glue applied to the end of a ribbon-shaped rubber thread. discovered that by fixing each rubber thread of the ribbon-like rubber thread appropriately, it was possible to easily and quickly securely connect the ends of the ribbon-like rubber thread with rubber glue, and thereby solved the above problem. It aims to solve the problem.

The present invention involves attaching a required adhesive tape of a predetermined length to one side of the ends of two ribbon-like rubber threads to which a plurality of cut thin plate-like rubber threads are temporarily glued, and then attaching a required adhesive tape to the other side of the ends of the ribbon-like rubber threads. After cutting the tape so that it is thin and has an appropriate slope to form a sloped surface, apply appropriate rubber glue, and after the required time has elapsed, both sloped surfaces are welded together under pressure, and then the adhesive tape on the front and back sides is peeled off. This is a method for connecting thin plate-like rubber threads formed in a ribbon shape, characterized in that each of the rubber threads is separated by loosening the connected portions.

(Function) The ends of each rubber thread of both ribbon-like rubber threads are connected by attaching adhesive tape to one side of each end to be connected, thereby increasing the adhesive strength at the cut surface of each rubber thread and making it possible to move. In addition to fixing the rubber threads, rubber glue was applied to the inclined surface to prevent air circulation even if there were gaps between the rubber threads, and to close the gaps between the rubber threads during grinding to form the inclined surface. Since the rubber threads are prevented from entering the cut surface and adhesion does not occur at the cut surface, the connection is reliable and can be completed in less than half the time required for conventional work, making the work extremely quick. It will be done.

Furthermore, the method of connecting the ends of each of the ribbon-like rubber threads is extremely simple and easy, and can be carried out even by an unskilled general worker.

(Example) The present invention will be described in detail below based on an example shown in FIGS. 1 to 3. Thickness Q, 5 mm, width 'l, 5 mm 4
A required length of cellophane tape 3 that can be bonded on both sides is pasted on one side of the end of the ribbon-like rubber thread 2 to which the book rubber threads 1 (11...14) are temporarily bonded. Figure 1-A
, B, a), and then grind the other side to which cellophane tape 3 is not attached using appropriate sandpaper or the like so that the tip 4 is thin and has an appropriate slope to form a sloped surface 5 (Fig. 1- After that, the cellophane tape 3 is fixed on a plate 6 having a suitable flat surface with the cellophane tape 3 facing down (FIG. 1-A, B).

Next, another ribbon-shaped rubber thread 2 of the same thickness and width to be connected to the ribbon-shaped rubber thread 2 is attached with sellotape 3' of the same length on one side of the end in the same manner as the ribbon-shaped rubber thread 2. Then, the other surface is ground to form an inclined surface 5 (FIG. 2). Subsequently, apply rubber glue such as Sharpy Pond 221 (trade name of Sharp Chemical Industries, Ltd.) to each inclined surface 5 of both ribbon-like rubber threads 2 and 2', and leave it for the required time (2 to S minutes). After most of the solvent has evaporated, align the inclined surface 5' of the ribbon-like rubber thread 2 with the inclined surface 5 of the ribbon-like rubber thread 2 and press it (Fig. 3).
After that, both ribbon-like rubber threads 2.2' that are fixedly connected are separated from the plate 6, and then cellophane tape 3.3' is applied on both sides.
The rubber threads 11 to 14 which are firmly connected are separated by peeling off the connected parts to some extent, and the ends of the ribbon-shaped rubber threads 1 are connected.

In this case, each rubber thread 7 (71
The ends of the rubber threads 11...74) are connected by attaching cellophane tape 3, 3 to one side of each end to be connected. In addition to increasing adhesive strength and fixing movement, each rubber thread 11...
...14 Even if there is a gap between the rubber threads 11...14, air circulation is obstructed, and the gap between each rubber thread 11...14 is closed during grinding to form both inclined surfaces 5.5. When rubber glue is applied to the inclined surface 5.5, it is prevented from entering the cut surface, and the rubber threads 11...14 do not adhere to the cut surface, so that the connection is reliable and The work can be done extremely quickly since it can be done in less than half the time required for conventional work.

Also, each rubber thread 71 of both ribbon-like rubber threads 2, 2...
The method of connecting the ends of 74 is extremely simple and easy, and can be carried out even by unskilled general workers.

In the above embodiment, four rubber threads 11...14
Although the explanation has been made regarding the fixed connection of the ribbon-like rubber threads 2 and 2' to which the rubber threads 7 are temporarily bonded, it goes without saying that the present invention can also be applied to ribbon-like rubber threads having three or less or five or more rubber threads.

Further, double-sided adhesive cellophane tape 3 or single-sided adhesive cellophane tape 3 was pasted on one side of the end of the ribbon-like rubber thread 2 or 2';・
14 so that it does not move, and each rubber thread 11
・・・・・・14 To cover the gap in the cut surface, if this purpose can be achieved, sellotape 3.
Any suitable adhesive tape other than 3' may be used.

In addition, the ends of both ribbon-shaped rubber threads 2.2' were ground with sandpaper to form an inclined surface 5.5', which had a thickness of The sloped surfaces 5 and 5' should be made rough so that the sloped surfaces 5 and 5' are not too thick.
, 5', and if this purpose can be achieved, the shape of the end portion is not limited to the shape shown in the drawings, and an appropriate material other than sandpaper may be used. Also good.

(Effect of the invention) Since the present invention has the above configuration, it has the following effects.

(1) Since the ends can be connected quickly, work efficiency can be improved.

(2) Even unskilled workers can easily connect the ends, which helps improve work efficiency.

(3) Productivity can be increased by improving work efficiency and work efficiency, contributing to increased corporate profits.

[Brief explanation of drawings]

The drawings are partially cutaway to explain the connection method according to an embodiment of the present invention, and Fig. 1 shows the working procedure for one ribbon-shaped rubber thread, (4) is a side view, and (B) is a front view. 2 is a side view of the other ribbon-shaped rubber thread after the work, and FIG. 3 is a side view of both ribbon-shaped rubber threads joined together. 1.11...14...Thin rubber thread 2.2
...Ribbon-shaped rubber thread 3...Double-sided adhesive cellophane tape 3...Single-sided adhesive cellophane

Claims (1)

[Claims] 1) A plurality of cut thin plate-like rubber threads are temporarily bonded together.
A required length of adhesive tape is pasted on one side of the end of each ribbon-shaped rubber thread, and the other side is cut so that the tip is thin and has an appropriate slope to form an inclined surface. After applying rubber glue and pressing the two inclined surfaces together after a required period of time, the adhesive tapes on the front and back sides are peeled off to loosen the connected parts and separate the rubber threads. A method for connecting thin plate-like rubber threads. 2) A method for connecting a ribbon-shaped thin rubber thread according to claim 1, characterized in that a double-sided adhesive tape is used on one side of the end of the ribbon-shaped rubber thread to be placed on the lower side. .