JPS60174147A - Method and apparatus for producing sanitary napkin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus suitable for manufacturing sanitary napkins of a specific structure using adhesives.

Sanitary napkins are usually formed by partially wrapping an absorbent material with a waterproof sheet and then wrapping the entire body with a porous sheet, and it is extremely rare to use adhesive in the construction of the sanitary napkin itself. However, there were many technical difficulties in using adhesives.

The present invention is a sanitary napkin with a specific structure formed by effectively using an adhesive, that is, a liquid-permeable sheet is arranged on one side of an absorbent body, and both ends of the waterproof sheet are connected to both sides of the absorbent body. To easily and continuously produce a sanitary napkin having a structure in which the sheet is folded back so as to protrude in the opposite direction and to expose the surface of a liquid-permeable sheet which is the usable side of the sanitary napkin, and is bonded at a predetermined point. This provides a method that can be used.

That is, the method for manufacturing a sanitary napkin of the present invention includes a cutting step of cutting a continuous absorbent body, and a placing step of placing the cut absorbent body on a continuously supplied first belt-like body. ,
a first adhesive application step of applying a first adhesive to a predetermined first part of the first strip or the cut absorbent body; a supply step of continuously supplying a second strip so as to cover the coated first region; and a step of supplying a second strip to a predetermined second region of the first strip or the second strip. a second adhesive application step of applying an adhesive; and a bending step of bending a part of the first band onto a part of the second band so that a second adhesive is interposed between them. Adhesion of the second strip and the first strip or absorbent body with a first adhesive, and a second adhesive between the folded first strip and the second strip. This method consists of an adhesion process in which adhesion is performed separately or simultaneously.

The present invention also provides an apparatus for carrying out the above method, namely:
A cutter that sequentially cuts the continuous absorbent body on the absorbent conveyance path, a first belt-shaped body guide that continuously supplies the first belt-shaped body to the lower surface of the absorbent body, and a first belt-shaped body guide that continuously supplies the first belt-shaped body to the lower surface of the absorbent body. A first adhesive applicator that applies a first adhesive to a predetermined first area, an absorbent body, and a second band-like body to cover the first area to which the first adhesive is applied. and a second adhesive application device that applies a second adhesive to a predetermined second portion of the first belt or the second belt. , a portion of the first strip is placed on a portion of the second strip, and a portion of the first strip is placed between the second adhesive applicator and the second adhesive applicator. A bending guide is provided for bending so that an adhesive is interposed therebetween, and the second belt-like body and the first belt-like body or the absorbent body are bonded with the first adhesive, and the first belt-like body is bent. The present invention provides a sanitary napkin manufacturing apparatus that is provided with one or two crimping devices for bonding the first and second strips together using a second adhesive.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the sanitary napkin manufacturing apparatus of the present invention used for carrying out the method of the present invention shown in the drawings will be described below.

In FIG. 1, A is the first strip guide, B is the first adhesive applicator, C is the second strip guide, D is the first crimping device, and E is the second adhesive applicator. In the sanitary napkin device according to one embodiment of the present invention, these devices A to E are connected to the transport path of the absorbent body a [the absorbent body a is moved from the left (front) to the right (back) in FIG. In addition, a folding device F is provided before and after the second adhesive applicator E, and a cutter is provided in front of the first band guide A. (Not shown.

A second crimping device (not shown) and a second cutter (not shown) are sequentially arranged behind the bending device F, so that the main This consists of the following parts (main parts).

Further, in the above-mentioned sanitary napkin manufacturing apparatus, an IM feeding path for the absorbent body a as shown in FIG. The absorbent body a is also provided with a cutter G and a folding guide (not shown) which are sequentially arranged on the absorbent body (also conveyed from the left to the right in FIG. 2). In the apparatus, while conveying the absorbent body a from the die cutter G along the conveyance path of the absorbent body a, a first strip b, a second strip C1, a first adhesive d and a second adhesive are applied. By appropriately supplying the agent e and the like, a sanitary napkin f having a specific structure as shown in FIGS. 3 and 4 can be manufactured.

The various devices that make up the above sanitary napkin manufacturing device are:
To explain in detail in accordance with the order in which they are arranged on the conveyance path of the absorbent material a, first, the above-mentioned cutters G are arranged as necessary in order to form a sanitary napkin f that has a good fit and does not feel strange when worn. As shown in Fig. 2, it is formed by a rotary cutter that combines an anvil cylinder 1 and a Goo cylinder 2 as a pair, and a material such as pulp, water-absorbing paper, etc. is inserted between these cylinders 1 and 2. By passing the absorbent body a continuously formed into a band shape, both edges of the absorbent body a are cut off at regular intervals in a symmetrical shape with respect to the center of the absorbent body a, as shown in the figure, and the cut unnecessary parts are removed. The liquid is separated and removed by suction through a suction hole 3 provided on the surface of the anvil cylinder 1. still,
Such cut portions may be asymmetrical.

In addition, the above-mentioned folding guide, which is arranged as a pre-processing device for the absorbent body a at the rear of the above-mentioned cutter 〇, as shown in FIG. The inner band-shaped absorbent body a is rolled up from below with water-absorbing paper i.

Further, the first cutter disposed behind the folding guide is configured in the same manner as the conventional product, and cuts the strip-shaped absorbent body a that has passed through the folding guide as described above in a certain length in the direction of the middle. You can do it, it's easy.

Further, as shown in FIG. 1, the first strip guide A is disposed below the moving absorbent body a that has been cut by the first cutter. A first belt-like material such as a waterproof sheet or waterproof film, which is larger than the inside of the absorbent body a, is continuously supplied to the lower surface of the absorbent body a.
It is possible to transport the first belt-shaped body while placing them at regular intervals on the first belt-shaped body. In addition, in Figure 1,
The cut portion of absorbent body a by cutter G and absorbent body a
The water-absorbing paper i covering is omitted.

Further, the first adhesive applicator B is disposed above the cut and moving absorbent body a and the moving first strip body, and is connected from the outside via a hose (not shown). The first adhesive d is supplied into the mount 4 through a lower nozzle 8 while being metered by a pump 7 driven by a motor 5 through a transmission device 6. There is no such thing as dispensing a fixed amount. In the case of the embodiment, the nozzle 8 faces a predetermined first part g of the moving first strip body exposed on both sides of the absorbent body 3, that is, both edges of the upper surface of the first strip body. Therefore, according to the sanitary napkin manufacturing apparatus of the embodiment, the first adhesive d can be continuously applied to both edges of the upper surface of the first strip. The above-mentioned first part g to which the first adhesive d is applied needs to be located inside the folding line when both edges of the first strip-shaped body are folded (as described later). Although FIG. 1 shows the case where the first adhesive d is applied linearly, the arrangement and number of nozzles 8 and the manner in which the first adhesive d is discharged from the nozzles 8 may be changed. By doing so, it is possible to apply the second adhesive d to any shape.Also, by configuring the first adhesive application device B to include the pump 7, etc. as described above, it is possible to stop the application. At times, leakage of the first adhesive d from the nozzle 8 can be prevented.

Further, the second strip guide C is disposed above the first 1W-shaped body on which the absorbent body a is placed and on which the first adhesive d is applied. A second belt-like body C made of a liquid-permeable sheet such as a non-woven fabric having a width narrower than that of the absorbent body A is
and the first adhesive d is continuously supplied so as to cover the first region g to which the first adhesive d is applied.

The first crimping device is composed of a pair of upper and lower crimping rolls 9 and 10, and the first strip b1, the second strip C, and the absorbent body a positioned between them. By passing between pressure rolls 9 and 10, the first belt-like body C and the second belt-like body C are crimped and bonded together with the first adhesive d, and a sheet with the absorbent body a wrapped inside is formed. It is pear-like to form a shape. Note that the surfaces of the pressure rolls 9 and 10 are coated with a non-adhesive material to prevent the first adhesive d from adhering when the first adhesive d oozes onto the surface of the first strip. It is coated with.

Further, the folding device F includes rollers 11 and 12 disposed below the conveyance path of the absorbent body a, and these rollers 11 and 11.
．． A roller row consisting of rollers 13 arranged between rollers 13 and 12 above the conveyance path of absorbent body a, and a pair of guides arranged between rollers 13 and 12 and positioned on both sides of the conveyance path of absorbent body a. 14, the sheet-like material that has passed through the first crimping device is passed through the roller row in a meandering manner, thereby applying tension to the sheet-like material and exposing both edges thereof. Both edges of the first strip-shaped body are made to stand up, and both edges of the raised first strip-shaped body are folded back inward when passing through the pair of guides 14.

Further, the second adhesive applicator is disposed above the conveyance path of the absorbent body a, and has the same configuration as the first adhesive applicator B, and the folding device F. When both edges of the first strip C rise up, the second strip C rises up a predetermined second part, that is, the rising portion (bent portion) is folded back. On both edges of the upper surface of the strip C,
The second adhesive e is discharged from the nozzle 8 to apply the second adhesive e. As shown in FIG. 4, it is preferable that the area to which the second adhesive e is applied is positioned further inside the sanitary napkin f in the horizontal direction than the area to which the first adhesive d is applied. Note that the cut portion of the absorbent body a and the water-absorbing paper i that wraps the absorbent body a are omitted in FIG.

Although not shown, the second crimping device is disposed behind the folding device F as described above, and has the same structure as the first crimping device. The sheet-like object was bent (folded back) when it passed through the bending device F.
The first belt-shaped body C and the second belt-shaped body C are pressed together and then bonded together via a second adhesive e. Incidentally, the second crimping device may be constituted by a 1ull feeding heald.

Although not shown in the drawings, the second cutter is configured as described above (such as a heat seal cutter disposed behind the second crimping device), and as described above, the second cutter A sheet-like material whose both edges are folded and crimped onto both edges of the second strip-like body C is cut in the middle direction at the part where the absorbent body a does not exist, and heat-sealed at the same time. It is.

Next, an embodiment of the sanitary napkin manufacturing method of the present invention using the sanitary napkin apparatus having the above configuration will be described with reference to the drawings.

When carrying out the method of the present invention, first, a continuous strip-shaped absorbent material a is cut into a cutter G as a pretreatment device.
The cutting step is carried out by this cutter 〇, and a part of the band-shaped absorbent body a is cut into a desired shape as described above.

The strip-shaped absorbent body a that has undergone the above-mentioned cutting process then passes through a folding guide, where it is rolled up by the absorbent paper i as described above. Incidentally, it is not necessary to perform such pretreatment of the absorbent body a.

Next, the continuous strip-shaped absorbent body a is cut into a certain length as described above by performing the (first) cutting step with the first cutter, and the cut absorbent body a is cut into a certain length by the first cutter. At the time of passing through A, a placing step is carried out, and as described above, the first strip is placed at regular intervals on the first strip that is continuously supplied by the first strip guide A.

The first strip-shaped body and the absorbent body a placed thereon then pass through a first adhesive coating device B, and at the time of passing, a first adhesive coating step is performed, As mentioned above, the predetermined first part g of the first band-shaped body
That is, the first adhesive d is continuously applied to both edges of the upper surface of the first strip.

Next, the first strip-shaped body coated with the first adhesive d passes under the second strip-shaped body guide C with the absorbent body a placed thereon, and here the first strip-shaped body By carrying out the supply process by guide A, as described above, the cut absorbent material a on the first strip and the first portion of the first strip coated with the first adhesive d are removed. The second strip C is continuously supplied so as to cover g.

The first strip b and the second strip cL pass through a first crimping device with the absorbent material a sandwiched between them, and then the first crimping device Da passes through the first crimping device Da. One bonding process is carried out, and as described above, the first part g of the first band-like body is placed in a state where both edges of the upper surface of the first band-like body on the outside of the first part g are exposed. and the second belt-like body C are bonded together by a first adhesive d, and the absorbent body a is wrapped between the first belt-like body and the second belt-like body C. A shape is formed.

The sheet-like material then passes through a folding device F, and at an intermediate point in the folding process by the folding device F, in other words, as described above, both edges of the first strip-like material of the sheet-like material are raised up. At this point, the second adhesive application step is performed by the second adhesive application device E, and the second adhesive is applied to the second portions on both edges of the upper surface of the second strip C as described above. When the agent e is applied and the bending process is completed, both edges of the first band-shaped body raised as described above are folded back, and this folded part (folded part) and the above-mentioned second part are folded back. A second adhesive e is interposed between the two.

As mentioned above, the bent portion of the first strip C and the second strip C
The sheet-like material with the second adhesive e interposed between the two edges of Both edges of the strip C are adhered to each other with a second adhesive e, and then, depending on the nature of the process, they are passed through the second cutter (heat sealer, ivy, etc.), as described above. absorber a
The sanitary napkin f as shown in FIG. 3 is obtained by cutting in the middle direction and heat sealing at the same time at the part where the .

In addition, in one embodiment of the apparatus of the present invention described above and one embodiment of the method of the present invention implemented using the same,
Although two crimping devices are used, one crimping device is installed only behind the folding device F, and the first strip-shaped body and the second strip-shaped body C are bonded with the first adhesive d. , and their adhesion using the second adhesive e may be performed simultaneously.

Further, in the above embodiment, a case is shown in which the bending device F is provided before and after the second adhesive application device E, but the bending device F
may be provided behind the second adhesive applicator E. Further, in the above embodiment, an example was explained in which the first adhesive d is applied to the first portion g on both edges of the first strip-like body, but the first adhesive d is applied to the absorbent body a. It may be applied to a part of the area, preferably to both edges thereof. Furthermore, in the embodiment described above, the case where the second adhesive e is applied to the second portions on both edges of the second strip C is explained. It may be applied to a predetermined position on one strip. In addition, in the method of the present invention, it is also possible to use a first belt-shaped body whose both edges are bent in advance. In that case, prior to supplying the first belt-shaped body in the above embodiment, It can be bent by a device similar to bending device F.

As described above, the present invention has the great effect that sanitary napkins with a specific structure formed using an adhesive can be manufactured easily and continuously by effectively using the adhesive. be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the essential parts of an embodiment of the apparatus of the present invention together with the essential parts of an embodiment of the method of the present invention, and FIG. 2 shows an example of the absorbent pretreatment apparatus along with its usage mode. FIG. 3 is a perspective view of a sanitary napkin manufactured by an embodiment of the method of the present invention, and FIG. 4 shows essential parts of a sanitary napkin manufactured by an embodiment of the method of the present invention. FIG. A...First strip guide B...First adhesive applicator C...Second strip guide D...First crimping device E...Second adhesive applicator Device F...Folding device a...Absorber b...First strip C...Second strip d...First adhesive e...Second adhesive f...Sanitary napkin g...First part h...Second part Agent Patent attorney Hatori Amendment document for repair procedures March 15, 1981 1, Case indication patent application 1982- 30102 No. 2, Name of the invention Method for manufacturing sanitary napkins and its device 3, Relationship with the person making the amendment Patent applicant (091) Kao Soap Co., Ltd. 4, Agent 6-6 Akasaka, Minato-ku, Tokyo No. 29 No. 5, Voluntary amendment of the date of amendment order (amendment within 1 year and 3 months from the date of application) 6, Target of amendment 7, Contents of amendment (11, page 6, line 20, "equipment" was changed to "manufacturing equipment") (2) Delete ``1 meandering'' on page 12, lines 13-14. (3) Add ``ununiform in the width direction'' next to ``on a sheet-like object'' on page 12, line 14. (4) On page 12, line 18, next to “None.”
The guides 14 may be provided in several pairs. ” has been added. (5) On page 14, lines 8 to 9, "Width direction...none" was corrected to "Heat sealing and cutting in the center direction may be performed simultaneously or sequentially." (6) On page 17, lines 13-14, ``The rr11 direction...is done,'' was corrected to ``Heat-sealing and cutting in the middle direction are done simultaneously or sequentially.''that's all

Claims (4)

[Claims] (1) A cutting process of cutting a continuous absorbent body, a placing process of placing the cut absorbent body on a continuously supplied first belt-shaped body, and a cutting process of cutting a continuous absorbent body; a first adhesive application step of applying a first adhesive to a predetermined first part of the absorbent body; and covering the cut absorbent body and the first part to which the first adhesive has been applied. a second adhesive step in which a second adhesive is applied to a predetermined second portion of the first strip or the second strip; a step of applying an adhesive; a bending step of bending a portion of the first strip onto a portion of the second strip such that a second adhesive is interposed therebetween; Adhering the first strip or absorbent body with a first adhesive, and bonding the bent first strip and second strip with a second adhesive, respectively, separately or simultaneously. A method for manufacturing a sanitary napkin, comprising a bonding step. (2) A cutter that sequentially cuts continuous absorbent bodies on the absorbent conveyance path, a first belt-shaped body guide that continuously supplies the first belt-shaped body to the lower surface of the absorbent body, and a first belt-shaped body or A first adhesive applicator applies a first adhesive to a predetermined first part of the absorbent body, and a second adhesive applicator applies a first adhesive to a predetermined first part of the absorbent body; a second strip guide that supplies the strip, and a second adhesive application device that applies a second adhesive to a predetermined second portion of the first strip or the second strip. At the same time, a part of the first strip is placed on a part of the second strip between the front and back of the second adhesive applicator or behind the second adhesive applicator. A bending guide is provided to bend the second strip so that a second adhesive is interposed therebetween, and the second strip and the first strip or absorbent body are bonded with the first adhesive, and the bent first 1. A sanitary napkin manufacturing apparatus comprising one or two crimping devices for bonding the strip-shaped body and the second strip-shaped body with a second adhesive. (3) When two crimping devices are provided, the first crimping device is provided between the second strip guide and the second adhesive applicator, and the second crimping device is provided between the bending guide. The sanitary napkin manufacturing apparatus according to claim (2), which is provided at the rear. (4) The sanitary napkin manufacturing apparatus according to claim (2), wherein when one crimping device is provided, the crimping device is provided behind the bending guide.