FR2700687A1 - Novel attachment device for hygienic articles and its method of production - Google Patents

Abstract

The present invention relates to the field of hygiene and more particularly to that of feminine hygiene. Its particular subject is fastening tabs forming an integral part of the sanitary towel and arranged asymetrically along the longitudinal edge of the sanitary towel, the adhesive part of which is on the inside for its user. The invention also comprises a method of production of hygienic articles fitted with these lateral flaps, which consists in enclosing the absorbent wad, formed by cellulose paste or composite, of the sanitary towel, between a polyethylene film and a layer of nonwoven textile or of microperforated polyethylene film which is leaktight to liquids outwards, by sealing the two films by sizing, by cutting from the band the previously formed fabric, consisting of the wad and the two protective layers of leaktight film, to form a corrugated strip in the form of a garland, by depositing on this garland a single-face silicon-coated paper whose inner face has previously been coated continuously or discontinuously with an adhesive and by depositing a second single-face silicon-coated paper whose inner face has previously been coated with one or more blocks of adhesive on the side flaps folded onto the inner face.

Description

NEW FASTENER FOR
HYGIENE ARTICLES
AND PROCESS FOR PRODUCING THE SAME
The present invention relates to the field of hygiene and more particularly to that of feminine hygiene.

It particularly relates to fixing lugs or removable fins deposited on the external face of the periodic towels and arranged asymmetrically along the longitudinal edge of the periodic towel.

We know, in fact, by the European patent application 0.134.086 (PROCTER & GAMBLE), by the European patent application 0.267.059 (BEGHIN-SAY) or by the international patent application WO 89/02729 that it is possible to provide, during the cutting of the external envelope of the periodic towels, side flaps of semi-circular or quadratic shape designed so as to form, after use, by folding around the periodic towel, itself folded, a sealed package disposable. According to European patent application 0.267.059 the presence of wings or lateral flaps at the biconcave zone of the internal face of the sanitary napkin also provides an improvement in lateral tightness as well as excellent comfort.

In this patent application, the wings or side flaps further comprise one or more folds, welded together, improving the lateral seal. The fixing of these wings is ensured by the cutting mode because they are an integral part of the towel.

However, it was desirable to find a fastening device which provides a greater surface area for attachment to the undergarment than that presented by current side flap devices and at the same time, which guarantees flatness and therefore lateral tightness without having use of complex industrial procedures.

The asymmetrical flap model defined in patent application 92.10052 in the name of the applicant already provides a first solution.

The device according to the invention aims to obtain this desired new result.

It is characterized by the fact that the side flaps are incorporated in the veil and in the waterproof part.

The side flaps according to the invention have a triangular surface extending over the median axis of the outer part of the period towel comprising at its base, a semi-circular notch.

The two side flaps are mounted head to tail on the towel, so as to offer the widest possible adhesion surface.

Before use, the flaps are lateral and are folded under the adhesive surface (s) of the single-sided silicone, placed on the internal surface, which allows the subsequent transfer of the adhesive surfaces to the lateral flaps during use.

The invention also includes a method of producing hygiene articles lined with these side flaps which consists of trapping the absorbent pad formed of cellulose pulp or composite of the sanitary napkin, between a film of polyethylene and a layer of nonwoven fabric or microperforated polyethylene film impermeable to the outside, to liquids, which the two films are sealed with, that the previously formed fabric, formed by the pad, is cut from the strip and the two protective layers of waterproof film by forming a corrugated ribbon in the form of a garland, which is deposited on this garland a single-sided silicone paper whose internal face has been previously coated continuously or discontinuously with an adhesive .A second single-sided silicone paper whose internal face has been previously coated with one or more blocks of glue is deposited on the side flaps previously folded over the inner side.

According to a particular embodiment of the invention, the sealing of the polyethylene film is carried out by heat sealing or by gluing.

In the latter case, an elastic cylindrical membrane maintained under pressure ensures contact between the two layers of film for sealing.

The cutting of the side flaps is done synchronously and in phase with the installation of absorbent pads.

The removal of single-sided silicone paper is carried out after cutting the ribbon into a garland. However, in a variant of the production method according to the invention, the removal can also be carried out before cutting the garland.

According to a particular embodiment of the invention, shown in Figure 1, there is shown seen from the front a periodic towel having two side flaps arranged asymmetrically and folded over the inner face of the periodic towel.

The perforated external veil (1) of the periodic towel, the central adhesive part (2) of the periodic towel, the two series of notches (3) and (3 ') on the one hand, (4) and (4 ') on the other hand, brought to the insertion of the side flaps on the external web.

Figure 2 shows the two side flaps deployed for use shown with each an adhesive surface (5) and (5 ').

According to various embodiments of the invention, these adhesive surfaces can either be wider to occupy part or all of the side flap, or even be in the form of several glued surfaces. FIG. 2 also shows the notches (3) and (3 ') on the one hand and (4) and (4') on the other hand, highlighting the advantage of these surfaces for ensuring the complete deployment of the flaps.

Figure 3 shows an enlarged view of the overlap of the two side flaps when they are folded down, or their asymmetrical arrangement relative to the axis of symmetry of the sanitary napkin when they are deployed.

The triangle determined by the side edge of the flap and the edge of the polyethylene fleece and nonwoven or upper veil has an apex angle of approximately 500, while the angle at the apex of the same triangle when the side flap is folded over the periodic towel is about 800.

The asymmetry of the two side flaps allows them to be completely folded after packaging along one of the sides of the triangle thus determined, occupying the minimum space in the packaging.

Other embodiments are still possible without departing from the scope of the present invention.

The invention also consists in making a kit adaptable to all existing manufacturing machines, using traditional manufacturing methods shown diagrammatically in FIGS. 4, 5 and 6.

 On these machines, the process for producing the absorbent mass is not modified compared to the technique but the first difference lies in the fact of adding a fabric or a nonwoven, or any other material making it possible to increase the diffusion of flows. The kit therefore comprises, first of all, an unwinder and folding machines making it possible to cover or coat the absorbent mass of this additional fabric to improve the diffusion.

The second modification of the machines consists of mounting a calendering stand to limit leakage on the sides of the product.

The shape of the calendering is very important. The pad or absorbent mass (8) is therefore produced with its diffuser (9) and can make it possible to continue the manufacturing process which is carried out continuously. The pad, once finished, is deposited on polyethylene (6) or on nonwoven (or a microperforated film) which has been previously glued for this operation. The kit therefore contains a gluing system (10) as well as a stand (22) for unwinding the material regularly in order to have the desired tension and a bar feed system (23) for regulating the film and unfolding it . The same station and designed to cover the tampon and sandwich it between the two layers of film (11). An addition of two waterproof strips (14) and (14 ') on the sides of the tampon can be adapted according to the manufacturing needs and therefore requires an additional reel (13) also equipped with a bar feeder (12) and a tension regulation system not shown. The side strips are then cut on a cutting station (15).

The sheet thus produced can then undergo the compression treatment (24) of the assembly to obtain good cohesion.

FIG. 6 shows the fixing of the two waterproof strips (14) and (14 ') on which the permeable film is adjusted.

Several variants are available with the kit 1. compression by level difference, the tablecloth that is being worked
flat and continuous, passes between several compression cylinders.

2. compression by a system of cylinders, flexible and swelling, which
allows to compress and dust the shape of the product.

Once a good cohesion of the sheet is obtained, we go to the next step: the lateral cutting of the product to obtain the fixing lugs.

The mounting kit therefore also comprises a continuous or intermittent cutting station (15) which allows the production of the lateral fixing lugs (the kit allows to make from 1 to 10 lugs depending on the end use of the product) . These legs can be asymmetrical or symmetrical (14) and (14 ').

The scraps are sucked up and collected in bags.

One or more single-sided silicone papers (16) coated with glue on one side (17) are deposited on the sheet.

The kit therefore also includes the system for removing and unwinding the silicone paper (16) and (16 ') as well as the sizing material (17) and (17'). The problem which then arises consists precisely in folding down the legs and in applying the adhesive walls to the legs using silicone paper. This is why the kit according to the invention also comprises a folding stand (25), a compression station (24) as well as a station for cutting silicone paper (26). Once the product is finished, all you have to do is cut it to the final length, fold it and pack it individually or leave it flat for use.

 The towel therefore has a silicone paper on the outer face as well as on the tabs on the inner face. During use, the silicone paper is first removed from the external face to apply it to the bottom of the panties and, secondly, only the silicone paper located on the fixing tabs.

The periodic towel according to the invention can thus be used with only 4 manipulations whereas for a model with 2 symmetrical fastening tabs, the number of manipulations is significantly higher.

Claims (2)

CLAIMS single sided silicone paper. internal, are covered by the adhesive surface (s) of which the triangular pieces previously folded over the rounded face at the top and at the base of the triangular piece and in this comprising a semi-circular notch at the base and a cutout on the axis median of the outer sheet of the towel that they are formed by two triangular pieces extending beyond the longitudinal edge of said periodic towel characterized in periodic towels and arranged asymmetrically along the  1 - Lateral fixing lugs placed on the external face of the The subject of the invention is  herself.  that the periodic towel is packed flat or folded over  previously coated with one or more blocks of glue and finally  internal, a second silicone paper whose internal face has been  deposits on the side flaps previously folded on the face  continuously or discontinuously coated with an adhesive; that one  single-sided silicone with the internal side previously  of garland, which we place on this garland a paper  protective protective film by forming a corrugated tape  previously formed, consisting of the pad and the two layers  film by gluing, which is cut from the strip of fabric  waterproof to the outside, that we seal the two thicknesses of the  non-woven fabric or microperforated polyethylene film  periodic towel between a polyethylene film and a layer  consists of trapping the absorbent pad of the  lateral fixing lugs according to claim 10 which  2 - A process for producing periodic towels filled with  achieve good cohesion of the protective article.  buffer then subjects the assembly to a compression operation to  film, if applicable, adds a waterproof strip on each side of the  the tampon and sandwiches it between the two layers of  using an unwinder and a bar feeder, in that we cover  ensuring the perfect unfolding of the film and its unfolding  polyethylene or a non-woven fabric, pre-glued, all  thus formed on a layer of impermeable material such as  limit lateral leaks, by removing the tampon  absorbent thus formed, a particular form allowing  manufacture of a calendering device which gives the pad  dispenser and folding machine, in that the line of  allowing to increase the diffusion of flows using a  known per se by adding a fabric or any other material  firstly, produces an absorbent mass according to the processes  work carried out by specialized machines, in which  according to claim 10 formed by a succession of positions of  30 An industrial manufacturing process for period towels  outwards.  nonwoven fabric or waterproof perforated polyethylene film  absorbent is trapped between the polyethylene film and the  40 A method according to claim 20 wherein the buffer  buffers.  buffer and the two films, synchronously and in phase with the  lateral of the fins takes place on the strip formed by the  5 - A method according to claims 2 and 40 wherein the cutting  buffer side faces were previously coated with glue.  deposits on the side strips of silicone paper, the  6 - A method according to one of claims 2 to 50 wherein  paws.  silicone paper is cut before application on  70 A method according to one of claims 2 to 60 wherein the  fins are folded before removing the silicone paper.  8 - A method according to one of claims 2 to 70 wherein the  and we wrap it individually.  cut to final length, the periodic towel, we fold it  90 A method according to one of claims 2 to 80 in which one  one of claims 2 to 90.  10 - Periodic towels produced according to the process defined in  the adhesive fixing lugs defined in claim 10.  11 - The periodic towels according to claim 10 comprising