JPS6087040A - Preparation of elastic member and manufacture of medical item with said member - Google Patents

Abstract

PURPOSE:To make the manufacturing process and equipments simple and miniaturize by a method wherein adhesive is applied intermittently to the longitudinal direction anyone of an elastic band and non-elastic continuous supporting tape, and the elastic band is adhered unitedly to the supporting tape. CONSTITUTION:A continuous elastic band is transported to draft rolls 5, 5 and 6, 6 through a guide ring 3 and guide rolls 4, 4 and is elongated at the determined magnification. This elastic band is transported to a roll 11 which is a connecting station, after treated at a seperate instrument 8 being transported there through a guide roll 7, and it is applied adhesive agent 1 intermittently by an applying instrument 12 to the longitudinal direction of it. In the mean while, a continuous supporting tape 14 which is composed of plastic film etc. and is non- elastic and is a little wider than the elastic band, is transported under light tension to the roll 11. Accordingly, the elastic band 1 is unitedly adhered to the supporting tape 14 with adhesive agent 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an elastic member suitable for use in sanitary articles such as disposable diapers and disposable diaper covers, and a method for manufacturing the article having the member, particularly the member. The present invention relates to a method for continuously applying a material to a component of the article.

Conventionally, as a method for continuously attaching elastic members to disposable absorbent articles, a technique disclosed in Japanese Patent Publication No. 57-26219, for example, has been known and practiced. The basic idea of this known method is to bond a continuous elastic member to a continuous web constituting a continuous article by intermittently applying an adhesive to the continuous elastic member while it is being stretched, and to bond the continuous elastic member in a state where the adhesive has hardened. The purpose is to intermittently bond a predetermined length of elastic member to a continuous web by cutting at a non-coated area and contracting the non-coated area. However, in the case of a practical article 1, for example, a disposable diaper, the continuous elastic member is glued between the front and back continuous webs, and the 11u non-applied area is cut together with both continuous webs. In order to shrink the cut non-applied area as described above, it is necessary to provide an opening between the two webs of each cut diaper for the shrinkage of the non-applied area. It is not possible to seal the lengthwise ends. Therefore, there is a drawback that urine leaks from the opening.

On the other hand, in general, in the production of disposable diapers having an elastic member using the above-mentioned known method, the scale of the manufacturing process and equipment tends to be relatively large and the equipment tends to be relatively complex due to the processing of continuous elastic members. However, especially when using a plurality of thin rubber threads as the elastic member, there are many problems in terms of high-speed processing of the elastic member during the process and, by extension, in terms of high-speed production of diapers.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing an elastic member and a method for continuously attaching the elastic member to a component of a sanitary article, which can eliminate the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to illustrated examples.

1 and 2, a continuous elastic band 1 is transferred from a box 2 to draft rolls 5, 5, 6, 6 via a guide ring 3 and guide rolls 4.4. The draft roll 6.6 has a predetermined peripheral speed higher than that of the rolls 5, 5, so that the elastic band 1 is stretched at a predetermined magnification.

In a preferred embodiment of the present invention, the elastic band 1 has a cross-sectional area of 0.03 to 0, as shown in FIG.
The rubber thread 1a having a size of 6 n+m2 is temporarily joined (fused) in parallel in such a way that it can be easily separated with a slight tearing force to maintain a tape-like shape. The elastic band 1 is transferred to a separating means 8 via a guide roll 7.

The separating means 8 separates each thread-like rubber 1a by hand in advance and places a 4'1'-shaped material between them, since the thread-like rubber 18 consisting of a plurality of thread-like rubbers 18 can be easily separated with a tearing force of about 1. It may also be something that intervenes. Incidentally, since such an elastic band 1 usually has talc powder attached to its surface,
Although not shown, it is removed during the process.

The elastic band l subjected to such treatment is attached to the guide roll 9
The elastic band is conveyed to a roll 11 serving as a bonding station with the spacing regulated by grooves 10, during which a hot-melt adhesive 13 is applied intermittently along the length of the elastic band by a coating means 12. On the other hand, the roll 11 is made of plastic film, nonwoven fabric, etc.
The continuous support tape 14, which has flexibility that does not interfere with the predetermined contraction force of the elastic band 1 and is substantially inelastic, and has a width slightly wider than the elastic band 1, is transferred under light tension so that no tearing force is applied to it. be done. Thus, the elastic band 1 is integrally glued to the support tape 14 with the adhesive 13 on the roll 11 .

The elastic band 1 thus adhered to the support tape 14 is cut by the cutter 16 in the non-adhesive area 15, and as the non-adhesive area contracts (see FIG. 4), the elastic band 1 is intermittently placed on the support tape 14. That will happen. The tape-shaped continuous elastic member 17 composed of the thus cut elastic band 1 and the continuous support tape 14 is wound onto a take-up roll 18 with the first elastic band 1 facing inside.

When the continuous elastic member 17 is wound onto the take-up roll 18, the adhesive 13 that integrates the elastic band 1 and the support tape 14 and the surface of the support tape that is in opposing contact are bonded together, making it difficult to unwind during use. If there is a risk of A, in order to prevent this, a method is generally adopted in which the +g adhesive 13 is forcedly or naturally cooled.
That is, the same effect can be obtained by applying water to the surface opposite to the contact surface of the elastic band 1 to form a water film.

The cutter 16 is preferably one using ultrasonic waves, and in this case, the cutter 16 is cutter 16 using ultrasonic waves, in which case the cutter 16 is cutter 16 using an ultrasonic wave. They are placed facing the road. When subjected to ultrasonic action by an ultrasonic cutter, the elastic band 1 and the support tape 4 are softened. Therefore, the elastic band 1 in the stretched state will be cut due to its contractile force reaching the softening point, while the support tape 14 will be under slight tension as described above, and even if it softens, it will not. , a small portion of the tape, which remains in a softened state since tension is not concentrated at the softening point, and is cooled and hardened during transport after the ultrasonic cutter is deactivated.

When a thin material such as the thread-like rubber Aha of the embodiment is used as the elastic band 1, the adhesive may be applied so that the entire outer circumference thereof is covered with the adhesive 13, as shown in FIG. . Therefore, the adhesive 13.

Although it is preferable to apply it directly to the elastic member 1, the support tape 14 may be applied by the application means 19 instead.

FIG. 6 is a schematic diagram showing a process of assembling a disposable diaper, which is an example of a sanitary article, using the elastic member 17. The elastic member 17 is unwound from its take-up roll 18 with the elastic band 1 facing downward, preferably coated with adhesive by the application means 20 along the elastic band 1, and transferred to the nip rolls 21,22. be done. The elastic member 17 is supplied to a predetermined portion of the back sheet and is bonded together. 6. An adhesive for bonding the elastic member 17 to the back sheet 23 is applied to the back sheet. It's okay to be.

The back sheet 23 with the elastic member 17 adhered thereto is then led to an assembly station S comprising nip rolls 25,26. On the other hand, a continuous surface sheet 27 made of a non-woven fabric or the like is coated with an adhesive at predetermined portions thereof by a coating means 28 and transferred to the station S, and is also made of defibrated pulp or the like cut into predetermined lengths in advance. individual absorbent panels 29
are transferred so that their relative positions are aligned with the elastic parts 17 bonded to the back sheet 23 at predetermined intervals in the front-rear direction (
(See Figure 7).

Therefore, each of the aforementioned members 17.23.27.2! A continuous diaper 30 is constructed by integrally stacking the J's.

A continuous diaper thus constructed: IO is each absorbent panel 2
9 between opposite ends in the front-rear direction, that is, at the chain line position shown in FIG. 7, thereby forming individual caps.

According to the method of the present invention, the tape-shaped continuous elastic member 17 for use in sanitary products such as disposable diapers can be manufactured very easily. Since it is arranged in the following manner, it is extremely suitable for use in the above-mentioned article.

When manufacturing the article, the elastic member 17 prepared in advance by roll winding can be unwound and continuously supplied to the constituent web of the article and assembled into the article by bonding 2, so that the manufacturing process is simple. It becomes possible to simplify and downsize the apparatus, and it also becomes possible to produce the article at high speed. Since the thus obtained article can be sealed at the cut end from its continuous state, urine will not leak from the cut end.

Therefore, the disadvantages of the previously mentioned known methods can be overcome and the intended purpose can be achieved, and the method is particularly useful as a method for manufacturing an elastic member used in disposable diapers and a method for attaching the member to the diaper.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of the process of manufacturing the elastic member of the present invention;
FIG. 2 is a plan view of the area shown in FIG. 1, FIG. 3 is a partial perspective view showing an example of an elastic band constituting the elastic member, FIG. 4 is a partial plan view of the manufactured elastic member, and FIG. 6 is a cross-sectional view in the width direction of the elastic member, FIG. 6 is a schematic side view of the process of manufacturing a disposable diaper using the elastic member, and FIG. 7 is a partially cutaway plan view of the diaper. 1... Elastic band 5, 6... Trough roll 12.
...Applying means 13...Adhesive 14...Support tape 15...Adhesive non-applied area 16...Cutter 17
... Elastic part] j20 ... Application means 23 ... Back sheet 1-27 ... Top sheet 29 ... Absorption panel 30
・・・Continuous diapers

Claims (4)

[Claims] (1) Stretch a continuous elastic band, intermittently apply an adhesive in the length direction of either the elastic member band or the substantially inelastic continuous support tape, and apply the adhesive to the elastic band. is integrally adhered to the support tape, and the elastic band is intermittently arranged on the support tape by cutting the non-adhesive area of the elastic band and contracting the non-adhesive area. 1. A method of manufacturing an elastic member, comprising forming the elastic member and winding the elastic member into a roll. (2) As a continuous elastic band, the cross-sectional area of one piece is 0.03~
2. The method of manufacturing an elastic member according to claim 1, wherein a plurality of rubber threads having a diameter of 0.6 mm λ are used and the rubber threads are arranged in parallel on the support tape at predetermined intervals in the width direction of the continuous support tape. (3) The method for manufacturing an elastic member according to claim 1, wherein the adhesive-free area of the continuous elastic band is cut using an ultrasonic cutter. (4) Stretch the continuous elastic band, and intermittently apply an adhesive along the length of either the elastic member or the substantially inelastic continuous support tape; A tape-shaped continuous elastic member is integrally adhered to the support tape, and the elastic band is intermittently arranged on the support tape by cutting the non-adhesive area of the elastic band and contracting the non-adhesive area. The elastic member configured and rolled is prepared in advance, and when manufacturing sanitary articles,
The elastic member 4 is unwound and supplied to a predetermined portion of the continuous web constituting the article, an adhesive is applied to either the elastic member or the web, and the adhesive is applied to the elastic member. A method for manufacturing a sanitary article, characterized in that the web is integrally adhered to the web, and the web is cut together with the continuous support tape between non-adhesive areas of the cut elastic band.