FR2764185A1 - Absorbent pad for infant, adult and feminine hygiene products - Google Patents

Abstract

The pad is made from wettable and thermo-reactive polymers, mono or copolymers of variable decitex and sized or unsized, initially treated with a flow of hot air (3) to render them slightly adhesive and give them bulk before spraying with granules of super-absorbent products (6) and/or other materials, heated by any appropriate means (8) to a temperature which ensures that they maintain their physical/chemical properties but adhere firmly to the fibres. The heated granules or powder are preferably sprayed onto one or both faces of a mono- or co-extruded polyolefin backing layer (11) maintained at ambient temperature or preferably heated to a temperature at which it is slightly adhesive. The pad is also equipped with adhesive fastening strips attached to the backing layer by welding or adhesive and coated with an adhesive substance. Increased absorption of fluids while leaving cover surface dry.

Description

 The present invention relates to the production of fastening and closing means for an absorbent cushion intended mainly for the production of baby, adult and female hygiene products.

 This patent follows on from that filed on 05.05.97 and registered under No. 9705789 and provides original complementary solutions both in terms of the deposition of super absorbent products, among others, on the cushion of polymer fibers and mainly on a different work of the means of fixing, maintaining and closing the above-mentioned finished products.

The above referenced patent application showed page 7 line 20 to page 8 line 27 different means of depositing super absorbent products, mainly in powder form at the base of the cushion of polymer fibers. The part page 7 line 23 to 27, showed more specifically that the deposition of super absorbent products could be done by making tacky by raising the temperature of the mono or copolymer polymer fibers,
naturally thermo-reactive or made such by an appropriate size.

 This additional patent offers an original series of deposits of super absorbent products or other granules and powders on one or more of the components necessary for the production of the various hygiene products mentioned.

 It should be remembered that low density polyethylene films generally used simply or complexed with nonwovens, cellulose wadding, etc. to form the bottom of finished articles in baby, adult and female hygiene, become sticky by raising the temperature at around + 70 to + 1000C depending on their grade. Mono or copolymeric polymer fibers or with specific sizes become sticky, by heating to temperatures ranging from + 60 to + 160 "C depending on the versions chosen. The granules or powders of superabsorbents resist temperatures of the order of + 200" C without modification of their physico-chemical properties. It is the same for the granules and powders of baking soda, talc, kaolin, sodium chloride. As for the different types of silicones and Teflon (registered trademark) their temperature resistance is much higher than + 200 "C.

 Depending on the needs, the low density polyethylene film forming the bottom of the finished objects could be co-extruded to obtain, for example, a thermoreactive face at relatively low temperature and intended for bonding by projection of granules or powders of superabsorbents or other materials. The other side would be very loaded with slip agents and release agents to make it as non-stick as possible. Of course, depending on the needs, any one or both sides could be matt or glossy.

 According to a first version, the granules or powders of super absorbent products or other materials are heated to a temperature below their point of physico-chemical modifications and sprayed on the base of the cushion of thermo-reactive fibers, maintained at room temperature.

 According to a second version, these same granules or powders of super absorbent products or other materials heated under the same conditions or at a substantially lower temperature, are for example sprayed onto the base of the cushion of polymer fibers whose temperature has been previously raised by any means. until they are slightly sticky.

 According to a third version, the granules or powders of super-absorbent products or other materials are heated to a suitable temperature and are sprayed under adjustable pressure onto the internal face of the low density PE film, mono or co-extruded, maintained at room temperature.

 According to a fourth version, the granules or powders of super absorbent products or other materials are heated to a suitable temperature and are sprayed under adjustable pressure on the internal face of the low density PE film mono or co-extruded and previously reheated to make it slightly sticky on its receiving side.

maintained at room temperature.

 According to a fifth version of the baking soda granules, for example, have been heated and sprayed onto all or part of the programmed portion, on the external face of the mono or co-extruded PE film forming the bottom of the finished object and kept at room temperature. .

Baking soda has, among other properties, to be an excellent odor absorber, very useful for the products that interest us. In addition, this programmed deposition of micro-balls of material would reduce the contact surface of the adhesive masses which will subsequently be positioned on it and would therefore allow easily, at a very modest cost, to reinforce the non-adhesive properties of the film forming the background of the objects.

 The sixth version would be identical to the previous one except that the PE film would be heated beforehand to make the receiving surface slightly sticky.

 The seventh version results from the combination of the fifth and first version where the spraying of the appropriate products will be done simultaneously on each of the faces provided on a film maintained at room temperature.

 The eighth version is identical in all respects to the seventh except that the PE film would be previously heated to make its two receiving faces slightly sticky.

 The ninth version sees the combination of spraying heated powders and granules, simultaneously on the basis of the polymer fibers of the cushion and on the PE film, both kept at room temperature.

 The tenth version is identical in all respects to that which precedes except that one or both receiving supports see their high temperatures to make them slightly sticky.

The eleventh version sees removal by all appropriate and defined means
subsequently on different layers or mattresses of suitable thickness and density, and then linked together to form strata with properties specific to the desired needs.

 Obviously all combinations or amalgams of products, methods, processes, temperatures, etc. can be carried out taking into account the most energy-efficient solutions. Likewise, all types of specific superabsorbents for blood, urine and stool, with particular gelling speeds and capacities, could be used alone or as a mixture or in combination, especially in the case of deposits by programmed zones.

 Of course, whatever the version chosen, the hot granules of super absorbent products can be deposited by spraying but also by soaking, fluidized bed, suction, vacuum, vacuum, scheduled removal as in gravure, flexo, screen printing, etc. Similarly the heating means can use all types of energy and be ventilated, pulsed, radiated, radiant, infrared lamp, steam, etc.

 Preferably, the thermal reactivation of the polymer fibers sensitive to the heat delivered by hot pulsed air also makes it possible to restore bulking to the mattress, this accentuated by the second spraying of hot super absorbents.

 The construction of the absorbent cushion with its upper cover stock, the mattress of polymeric fibers for distribution and distribution of fluids, the population of super absorbent products progressing towards the bottom of the cushion, allow to obtain a dry surface feel, because the liquids are as drawn by the wettable and draining polymer fibers and quickly gelled by the superabsorbents suitably deposited in the right places and in the right quantities.

 The polymeric fibers which are naturally thermo-reactive or made such by a specific size could advantageously be heat-sealed on the film forming the bottom of the finished articles. The mechanical resistance and the integrity of the cushion would make that partial connections, by points, would be sufficient to ensure a good cohesion of the different materials between them.

 As regards the means for fixing and closing the finished products mentioned, the object of the invention is essentially to simplify the means currently used and as described on page 10 line 22 to 32 of the aforementioned patent application.

In the case where it is a question of maintaining the baby / adult diapers around the waist of the carrier, the means currently used are: - the so-called multi-layer adhesives (<Y or (<fastening tape constituted by the association of 2 or 3 materials of nature, quality, grammage, thickness, color,
different or identical with permanent and / or removable glues as well as non-stick surfaces produced either by siliconization or by deposition of non-stick acrylic lacquer and varnish. These Y adhesives are positioned behind the baby diaper and often straddle the polyethylene film forming the bottom of the diaper. They are located near the waist and always have a non-adhesive part at their end to facilitate gripping. After having surrounded the size of the wearer, the diaper is kept in position by applying the free adhesive part of the> on a strip of film, generally made of adhesive-printed and printed polypropylene, glued to the front of the diaper, exterior most often and commonly called comfort or reinforcement strip.

 - Velcro type fasteners (registered name). The part fixed on the back of the baby / adult change resembles line for line to an adhesive Y which would receive on its free adhesive part a strip of semi-rigid material, gripping, consisting of a large number of pins whose end would project slightly of the load-bearing rod like so many tiny hooks that would hang in the female part. Said female part is arranged on the front of the baby and adult diapers, near the waist. This female part is most often made up of a judicious interlacing of synthetic fibers forming like a gauze and solidly fixed on a support generally made of adhesive-printed and printed polypropylene which will stick to the front face of the diaper.

 These sophisticated constructions, in addition to the fact that they are expensive, require a specific product on each side of the exchange. They also aim to reinforce, by their position on horseback, the back of the layer, where traction will be exerted during the adjustment of the finished product around the size of the wearer.

 The object of the invention is to provide simpler and more rational constructions by reducing the number of materials to be used simultaneously, without any particular product on each of the right and left sides.

 To this end, the invention proposes the fixing by heat sealing or, where appropriate, by bonding of a support, one of the free faces of which is non-stick, on the internal face and at the rear of the support forming the bottom of the object. , near the waist.

 By supports we mainly mean papers and / or films of different quality, weight, thickness, color, stiffness, flat or embossed, embossed, matt or glossy, neutral and / or printed, etc.

 By non-adhesive we mainly mean silicone emulsion, solvent-free, solvent, ultra violet, electron beam system, but also, Quilon (registered trademark), Teflon (registered trademark), varnishes and non-stick acrylic lacquers , diamond point embossing, rhombus, creping, impregnation or coating of latex and rubber, wax, paraffin, spraying and bonding by bonding or heat sealing of micro-beads, granules made of suitable materials, co-extrusion of polyolefin films with surface siliconization integrated and all solutions reducing the contact surface of the adhesive with its counterpart.

 As a non-restrictive example, the support could consist of a white low density polyethylene film, silicone coated on one side. The free part on the back could advantageously be heat-sealed on the polyethylene film forming the bottom of the object, the two materials being of the same nature and of the same melting point. The silicone deposited on the outward facing side would not be affected by this welding, because its temperature resistance is much higher than that of low density PE films. In addition, this very economical operation would reinforce the mechanical resistance of the film forming the bottom of the layer at the place where traction is exerted when the product is placed on the carrier.

 The adhesive tape, practically a standard commercial product, would be fixed on a suitable surface on the rear part and on the external face of the PE film forming the bottom of the object. It would then be folded in the direction of the internal face of the PE film forming the bottom of the layer, precisely at the place where the white silicone PE film would have been fixed, its non-stick side on the outside, awaiting the adhesive tape. The end of the latter would be folded back on itself or support a thin strip of non-adhesive product in order to easily constitute a non-adhesive gripping tab.

 The adhesive tape secured to the external face of the PE film forming the bottom of the layer, would help to strengthen the nerve center, the mechanical strength of the assembly, to support the pulls that are exerted there.

 The adhesive tape thus deposited very advantageously forms an adhesive <e Y. It could also very easily be printed, if necessary.

 Of course, all types of supports, both for the non-adhesive part and for the adhesive tape, could be used, simply or combinations thereof.

 The adhesive part of the tape, temporarily folded over the silicone side and heat sealed on the PE film forming the bottom of the object, will then be positioned on a strip to hold the finished product around the size of the wearer. called comfort or reinforcement.

 This strip located approximately at the same height, near the waist, on the outside, more often than not, on the front face of the PE film forming the bottom of the object, could very economically be constituted by the same adhesive tape as in back. Indeed, all the counter faces of the single-sided adhesive tapes are of course coated with a more or less significant layer of anti-adhesive, if only to allow the adhesive tapes to be unrolled easily. The application on this backing of the same adhesive tape with easy unwinding, would easily allow positioning and adjustment around the waist. In any case, the adjustment of the separation forces between the adhesive tape and their counter faces can easily be controlled by acting either on the release values of the counter faces, or on the tack and the tackiness of the adhesive masses deposited on the supports.

 In another presentation, where a gripping closure is required, the construction is identical to the previous description except that a suitable surface of gripping material forming the male part, would be deposited on the adhesive before being folded in waiting position on the non-stick side. The female part located at the front of the baby / adult diaper would be in the same position as the comfort strip described above and would be made by a dense interlacing of polymeric fibers, made integral with the PE film forming the bottom of the object. and described on page 10 lines 25 to 32 of the previous patent application.

 In the above-mentioned cases, of course, the widths, lengths, colors, thicknesses, qualities, process, etc. materials could be adapted such as simple laying for small objects and multiposes for adult diapers.

 For light ambulatory incontinence products and feminine hygiene products, these products are generally fixed and maintained by bonding to the bottom of the wearer's undergarment, on a more or less large area and more and more by means of lateral fins completely or partially coated with adhesive. Whatever the positioning and the surface of these hot melt glues deposited on the PE film forming the bottom of the object, these adhesive masses are always protected until their use, by removable papers and / or silicone films. The presence of lateral fins, also called <(ears is intended to strengthen the retention of the object on the undergarment by enclosing the bottom of the pants. These fins do not contain absorbent products of any kind whatsoever and n therefore have the function described above. The fins form an integral part of the PE film forming the bottom of the object as well as associated products such as non-woven veil or cover stock in perforated PE film and are made integral with each other. by heat sealing or hot melt bonding, fi results in a large quantity of falls in the lower and upper parts of each of the fins and with materials of high cost, in particular the perforated PE film.

 Often the flattest products using combinations based on dry latex or thermo bonded paper, are presented folded in 2 or 3 parts in paper or neutral film bags and / or printed.

 The main object of the invention is to provide a series of simpler, more economical, easier and just as secure fasteners, whatever the anatomical shapes of the finished objects.

 A first presentation of the invention, for small flat products such as panty liners, is to remove the hot melt adhesive as it is currently deposited on all or part of the support forming the bottom of the finished object as well as the paper. silicone and add on each side, fins in adhesive material on one side totally or partially. These products could advantageously consist of standard commercial adhesive tapes, based on films or papers. The adhesive tape retained could be fixed laterally on a small surface of the finished object, for example, at the place of heat sealing, bonding of the materials between them and be folded over the rear part of the finished object, on the PE film. or other material forming the background of the object.

The width of the adhesive tape and its positioning on the perimeter as well as the installation angle, the length, etc ... could vary according to the needs.

 If it appears more practical, especially on processing machines, the adhesive tape forming the attached side fins, could be in one piece and cross perpendicularly the entire width of the finished object and overflow on either side of the sides according to suitable surfaces. Being adhesive it would simply stick by pressure on the internal face of the PE film forming the bottom of the object.

According to another presentation of the invention, the laterally attached fins could be made of simple or complexed materials, such as for example extruded nonwoven laminated with polyethylene, PE film alone, etc. In any case and whatever
either the selected materials, simple or composite, the fins could be glued, heat-sealed on the inside of the film forming the background of the object and cross it, crosswise, as in the first presentation. The fins could also be fixed either by gluing or heat sealing on a small part of the perimeter of the finished object. In this case, the fins could be fixed either on the periphery, either on the internal face of the PE film forming the bottom of the object, or on the periphery of the object after bonding of the cover stock and the PE film forming the bottom of the object. Obviously the free parts of the fins would receive an adhesive or hot melt glue suitable in quantity and dimensions, before being folded over the external face of the PE film forming the bottom of the finished object, preferably on the most non-stick parts. .

To facilitate gripping, the adhesive tape could be folded back on itself at its free end or receive a thin non-adhesive strip to form a tab.
The support forming the bottom of the object generally made of low density polyethylene should advantageously be slightly anti-adhesive to allow easy removal of the adhesive tape folded over the latter support. To do this, one or combinations of the solutions proposed in the paragraph of the different anti-adhesion modes could find their application on all or part of the surface. For example, a PE film coextruded with an external fice very loaded with slip and release agents and an internal thermoreactive face, covered in the desired places, either with superabsorbent granules or with baking soda granules, which would deform the external surface by forming roughness or embossing which would reduce the contact surface of the adhesive with the PE film. This operation would have the advantage of simultaneously achieving two of the essential aims sought. The slightly non-adhesive treatment of the back faces of the adhesive tapes could be selected and adapted according to the aggressiveness of the adhesive masses deposited on the tape, or the local heat-sealing on its free face of a PE film, the other side of which would be silicone, or any other means specific to each case.

During use, the fins reported and provisionally folded back on the support forming the bottom of the object, would open to come to grip on both sides by folding the bottom of the pants of the wearer of the object. Obviously these products could be delivered flat or folded in individual bags according to the usual presentations of the trade
According to a first version, the panty liners, for example, could receive a deposit of hot melt glues, of suitable shapes and surfaces, at each end or along the object. In the case of folding in 2, the adhesive deposits would overlap one another, folded in 3, each end of the object would touch. In all cases, they would cover a corresponding surface with slightly anti-adhesive PE film. Despite these properties, hot melt adhesives will penetrate and adhere perfectly to this surface because the heat during deposition binds them intimately to the PE film. This non-sticking maintained makes it possible to ensure easy detachment of said adhesive deposits on this same face.

 According to a second variant, the products such as day, night, normal protections, etc. very often delivered with integrated fins and in individual bags, could receive the combination of the two presentations above: lateral fins reported in adhesive tape and deposit of masses adhesive on the support forming the background of the object. The parts at the top and bottom which would receive the deposits of adhesive masses would be positioned on the opposite face of the adhesive tape forming the fin, by suitable folding.

The free edges at each end of the finished object should be in maximum contact with each other during the folding operation, to prevent one of the two from sticking to the face of the 'finished object in contact with the wearer's skin. The release values of the non-stick surfaces, the tack and the tackiness of hot melt or adhesive glues could be adjusted to find the right balance between the adhesion and peeling forces.

In this example, the finished object would be perfectly attached to the bottom of the wearer's undergarment, at the front and at the back as well as by lateral clamping.

 In certain cases the use of a film and / or paper release paper on one or two sides could obviously be retained. The quantity and surface of the latter would in any case be much lower than they are today, taking into account the folding system and the surfaces and positioning of the adhesive masses which are the subject of the invention.

 By supports for the finished object, we mean all mono or coextruded polyolefin films, cellulose wadding, nonwovens, dry airlaid type paper, and all combinations obtained by lamination extrusion or laminating of one or more several of these materials together.

 In any case, the invention will be well understood in its various applications thanks to the following description, with reference to the appended schematic drawings, by way of nonlimiting examples.

 FIG. 1 represents a cushion 1 of wettable and thermo-reactive polymer fibers 2, preheated by a current of hot air 3 to cause these fibers 2 to become slightly sticky. The pressure of the hot air 3 restores swelling 4 to the fibers 2 forming the cushion. The mattress thus re-inflated receives at its base 5 micronized powders of super absorbent products 6 sprayed by a nozzle 7 and heated to the temperature required by an electrical resistance 8. These super absorbents will penetrate under pressure inside the mattress 1 of decreasingly from top to bottom and form a crust 9 of superabsorbents, but sufficiently ventilated to allow them to expand, as soon as they come into contact with liquids. In the direction of unwinding 10 the mattress thus re-inflated with its superabsorbents 6 suitably and durably fixed to the fibers 2, will be glued or partially heat sealed on the support 11 forming the bottom of the object.

 FIG. 2 represents a baby / adult diaper 12 where a surface of low density polyethylene film 13 is heat sealed on its free face 14, on the PE film 11 in its inner part 15, the silicone part 16 of this film 13 is turned towards the inside the exchange 12.

 FIG. 3 represents the extension of the operations for producing the fastener where a single-sided adhesive tape 17 and its slightly non-adhesive backing 18 is glued to the external face 19 of the film 11 in a position such that this part is reinforced to resist tensions and pulls which are exerted at this place. The adhesive tape 17 is folded at 21 to form a joint in order to superimpose the silicone part 16. The free end 22 of the adhesive tape 17 indifferently receives a non-adhesive part or is folded back on itself to form a tab 23 facilitating the gripping.

 Figure 4 shows a baby / adult diaper 12 where an adhesive tape on 1 side 17 possibly identical to that used for the rear part already described, is deposited on the face 19 of the film 1 1 to serve as counter part 20 to the adhesive part of tape 17. The slightly anti-adhesive backing 18 will allow multiple poses and removals of the adhesive tape 17 to adjust the layer to the size of the wearer.

 Figure 5 is derived from Figure 4 where the adhesive tape 17 receives a semi-rigid gripping part 21 called the male part, which will come during the fixing of the layer 12 around the waist of the wearer, hang in interlacing of fibers 22 constituting the female part and the comfort and reinforcement strip on the front face 19.

 FIG. 6 represents in section a flat feminine hygiene product where the support 1 1 receives on internal face 15 on a part of its perimeter, a single-sided adhesive tape 17 terminated at its free end 22 by a gripping tab 23. By rotation around the hinge 21 located at the extreme edge of the periphery of the finished object, the adhesive part of the tape 17 is positioned on the slightly non-stick face 19 of the support 1 1 practically in the middle. The fabric of the undergarment 24 is enclosed by the two attached fins and constituted by the single-sided adhesive tape 17.

 Figure 7 shows in section a feminine hygiene product where the support 1 1 receives over a small area and over its entire perimeter, a cover stock 25 often in nonwoven veil or a PE film perforated and held by bonding or heat sealing.

The outer face 26 resulting from this lamination receives on a part of its perimeter an adhesive tape 17. The construction and the use are then identical to those of the previous figure 6.

FIG. 8 shows a view of the rear face 19 some exemplary arrangements for positioning the adhesive tape 17 single face with its tab 23 and its hinge 21
FIG. 9 shows a view of the rear face 19 some exemplary arrangements for positioning adhesive masses 17 facing outwards with its pre-folding 27 allowing the two ends 28 of the finished object to touch in the folded position.

 The positioning of the adhesive masses 17 in all cases provides a gripping tab 23, the object being folded in 3.

 Figure 10 shows view of the rear part 19 slightly an

Claims (10)

 1- absorbent pad 1 consisting of wettable and thermo-reactive polymer fibers 2, mono or copolymers, of variable decitex, sized or not, characterized in that they receive beforehand a stream of hot air 3 intended to make these fibers 2 slightly sticky and to give them bulk before spraying granules of super absorbent products 6 and / or other materials, heated by any appropriate means 8, at a suitable temperature so that they retain all their physicochemical properties in such a way that these super absorbent granules and / or other materials adhere permanently by thermal reaction to the polymer fibers 2, gradually from the top to the bottom of the cushion  2- absorbent pad 1 consisting of 2 wettable and thermo-reactive polymer fibers, mono or copolymers, of variable decitex, sized or not, characterized in that powders or granules of products super absorbent of liquids and / or odor absorbers, heated to suitable temperatures are preferably sprayed onto one or both sides of a polyolefin support 11, mono or co-extruded, maintained at room temperature or preferably reheated to a temperature such as one and / or the other of the faces become slightly sticky to fix said powders or granules which, in addition, will form on the faces concerned, a succession of surface roughness making said face more easily separable from the adhesive masses 16 provisionally deposited thereon.  3- absorbent pad 1 according to claim 1 and 2, consisting of wettable and naturally thermo-reactive polymer fibers or made such by a specific sizing which can preferably receive, in successive layers, sprays of superabsorbent products of liquids and / or absorbers odors, characterized in that these said layers can be assembled together by thermal reaction or bonding and form a laminated complex with properties specific to each of the layers, said multilayer cushion being made integral with a mono or co-extruded polyolefin film , itself coated or not by the same means, of powders and granules with particular properties, by gluing or heat sealing.  4- absorbent pad 1 according to claim there 3, constituting the active part of baby and adult hygiene products characterized in that the closing and holding means are constituted by the association of a support 13 heat-sealed or glued to its face 14 on the support 11, face 15, forming the bottom of the finished object, its non-stick face 16 making it possible to receive an adhesive mass 17 deposited on a single-sided tape, made of synthetic material, natural or complexed, commercial standard.  5- absorbent pad 1 according to claims 1 to 4, constituting the heart of baby and adult hygiene products, characterized in that the closing and holding means are constituted by the association of a support 13 heat-sealed or glued to its face 14 on the support 11, face 15, forming the bottom of the finished object, its adhesive face 16 making it possible to receive an adhesive mass 17 deposited on a single-sided tape of synthetic material, natural or complexed, commercial standard, which receives in turn on a suitable surface, a semi-rigid gripping part 21 intended to hang by simple contact or pressure, an interlacing 22 of polymer fibers arranged on the front part 19 of the product 12, by gluing or heat-sealing.  6- absorbent pad I according to claims I to 4, characterized in that the closing and holding means constituted by adhesive tapes 17, are positioned on a so-called comfort and reinforcement strip 20 produced by an adhesive tape 17 glued on a part of the face 19 of the film 11, with its slightly non-stick face 18 which allows successive bonding and take-off of the adhesive mass 17 of the single-sided tape glued and secured to the rear part of the diaper 12.  7- absorbent pad 1 forming the active part of feminine hygiene products, according to claims 1 to 3, characterized in that the means for fixing and holding on the undergarment of the wearer 25, are constituted by attached fins, made from an adhesive tape 17 or synthetic or natural or complexed supports receiving a suitable adhesive mass 17 and glued to the internal face 15 of a support 11, that is to say over the entire width of the latter by forming a perpendicular cross , or on an adequate part of its periphery and temporarily folded through the hinge 21 on the rear face 19 slightly non-stick to form all possible angles and designs with the lateral edges of the film II and of the rear face 19.  8- absorbent cushion I forming the active part of feminine hygiene products, according to claims 1, 2, 3, 7 characterized in that the means for fixing and holding on the undergarment of the wearer 25, are constituted by attached fins, produced from an adhesive tape 17 or from synthetic or natural or complexed supports and receiving an adhesive mass 17 and fixed on all or part of the perimeter of the  finished product, on the face 26 resulting from the bonding or heat-sealing of the film 11 with the coverstock 25.  9- absorbent cushion 1 forming the active part of feminine hygiene products, according to claims 1, 2, 3, 7, 8 characterized in that the means for fixing and holding on the undergarment of the wearer 25, are constituted by attached fins, combined with deposits of adhesive masses 17 of suitable surfaces and shapes, deposited at each end of the face 19 slightly non-adhesive, before folding into 3 parts, along line 26 so that said adhesive masses are positioned on the non-stick parts 16 or 19, possibly made more effective by the craterisation of their surfaces which will reduce the points of contact with the adhesive masses, resulting from sprays of powders or granules on one or the other of the faces of the film 11 .  10- absorbent pad 1 forming the active part of feminine hygiene products, according to claims 1, 2, 3, 7, 8 and 9 characterized in that the face 19 can receive non-stick treatments or non-stick supports reported by bonding or heat sealing such as silicone papers or films adapted to the adhesion and tack strengths of the adhesive masses 17.