EP1194090A1 - Coussinet absorbant lavable et procede de fabrication - Google Patents

Coussinet absorbant lavable et procede de fabrication

Info

Publication number
EP1194090A1
EP1194090A1 EP00937373A EP00937373A EP1194090A1 EP 1194090 A1 EP1194090 A1 EP 1194090A1 EP 00937373 A EP00937373 A EP 00937373A EP 00937373 A EP00937373 A EP 00937373A EP 1194090 A1 EP1194090 A1 EP 1194090A1
Authority
EP
European Patent Office
Prior art keywords
moisture
layer material
absorption element
permeable top
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00937373A
Other languages
German (de)
English (en)
Inventor
Gregorius Maria Hubertus Goyarts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goyarts BV
Original Assignee
Goyarts BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goyarts BV filed Critical Goyarts BV
Publication of EP1194090A1 publication Critical patent/EP1194090A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/48—Devices for preventing wetting or pollution of the bed
    • A61F5/485—Absorbent protective pads

Definitions

  • the invention relates firstly to a washable pad, at least comprising an assembly of a moisture-absorption element which is positioned between a moisture-permeable top-layer material and a moisture-impermeable bottom- layer material, each with a thickness and an area which are such that the materials have substantially the same surface area and, in the position of use, the top surface of the moisture-absorption element bears against the bottom surface of the moisture-permeable top-layer material and the bottom surface of the absorption element bears against the top surface of the moisture- impermeable bottom-layer material, and in which the moisture-permeable top-layer material, the moisture-absorption element and the moisture- impermeable bottom- layer material are joined together to form a single unit,
  • Washable pads of this nature are used as protection on, for example, a mattress, in order to prevent them from becoming soiled, for example when used by incontinent patients.
  • the pad collects any soiling instead of the mattress; once it has been washed, the pad can be reused.
  • top and bottom surface relate to the orientation of these surfaces in the position of use of a pad, i.e. on top of a mattress or other base, with the moisture-permeable top-layer material facing upwards.
  • a washable pad of this nature is known from US-A-3 , 965, 503.
  • This publication describes a washable pad of the type described in which the join between the above layers is brought about by stitching.
  • the moisture- impermeable character of the bottom-layer material is brought about by providing the bottom- layer material with a moisture- impermeable coating subsequent to the stitching operation, for example by applying a molten coating of polyvinyl chloride, followed by cooling of this coating so that it solidifies.
  • Sealing is necessary because moisture can pass downwards from the patient along the stiches, so that a good seal is necessary.
  • the object of the present invention is to provide an improved washable pad of the above type and is characterized in that between two out of the moisture-permeable top-layer material, the moisture-absorption element and the moisture- impermeable bottom-layer material, there is a form of bonding, over at least part of the surface thereof, which differs from the form of bonding between the third out of the moisture- permeable top-layer material, the moisture-absorption element and the moisture-impermeable bottom-layer and one of the above two, or there is no bonding at all, while the moisture- impermeable bottom-layer material is intrinsically moisture- impermeable.
  • Intrinsically moisture-impermeable is intended to mean that the material in question is impermeable to moisture without requiring any further treatment.
  • a moisture-permeable top layer is joined to an absorption body by means of stitching; then, strips of material are placed against the moisture-absorption body on the underside and are then joined to the assembly of top layer and absorption body by additional stitching. On their side which is remote from the absorption body, the strips have a thermoplastic coating. Then, a moisture-impermeable bottom-layer material is placed against the underside of the absorption body; on the side facing towards the absorption body, the bottom-layer material has a layer of thermoplastic. By exerting pressure and/or supplying heat, the thermoplastic layer of the strips is joined to the thermoplastic layer of the bottom-layer material, so that the three layers are joined together.
  • bonding is present between the moisture-permeable top-layer material and the moisture- impermeable bottom- layer material via perforations, which are present in the moisture-absorption element, in the form of bonding points .
  • the presence of a bond between the moisture-permeable top-layer material and the moisture-impermeable bottom-layer material firstly produces excellent fixing of the various layers with respect to one another; there is no need for any further bonding of the third layer, which in this case is therefore the moisture-absorption element.
  • the dimensions of the perforations are selected in such a manner that the moisture-permeable top- layer material of the moisture-impermeable bottom-layer material can easily make contact with one another in order to be bonded together under the influence of heat and/or pressure. Bonding can be brought about using, for example, HF, ultrasonic or thermal spot welding; obviously, bonding can also be achieved with the aid of a locally applied bonding agent.
  • the dimensions of the perforations are not critical, provided that the abovementioned condition concerning contact is satisfied. Good results are obtained with perforations with a diameter of between 10 and 50 mm; in one specific case, perforations with a diameter of 25 mm gave good results.
  • the centre-to-centre distance may be from 50-400 mm, preferably 100-200 mm.
  • the use of a moisture-absorption element with perforations is known per se from NL-B-1009034 , in the name of the applicant.
  • the perforations allow rapid drying of the absorption element following washing of the pad.
  • the perforations for promoting drying are generally of smaller dimensions than those discussed above for forming the bond between the moisture-permeable top-layer material and the moisture-impermeable bottom-layer material.
  • the perforations which promote drying may, for example, have a diameter of 1-5 mm with a centre-to-centre distance of 8-30 mm.
  • a practical embodiment has perforations with a diameter of approximately 3 mm and a centre-to-centre distance of approximately 12 mm.
  • the absorption element may be of smaller size than the moisture- permeable top-layer material and the moisture-impermeable bottom-layer material, and the said top-layer material and bottom-layer material are then bonded together.
  • thermoplastic may be arranged on the top and/or bottom surface of the moisture-permeable top-layer material, or the top surface of the moisture-impermeable bottom-layer material, at the location of the borders and/or the perforations for bonding, in order to promote the bonding between top-layer material and bottom-layer material in those regions .
  • the moisture- impermeable bottom- layer material on the side which faces towards the moisture- absorption element, is coated, over at least part of its surface, with a layer of bonding material which bonds the moisture-absorption element and the bottom- layer material together.
  • the bonding between the moisture-absorption element and moisture-permeable top-layer material may be of numerous types, as will be explained in more detail below; it is possible to select stitching; stepping/quilting; needling, HF/ultrasonic welding, etc.
  • the latter embodiment can be used to very good effect if there is no bonding between the moisture-absorption element and the moisture-permeable top-layer material.
  • Starting from an intrinsically moisture-impermeable bottom-layer material and bonding the said material to the moisture-absorption element with the aid of a layer of bonding material also results in a considerably more flexible washable pad compared with the pad which is known from the prior art as described above.
  • the bonding material as referred to above may, on the one hand, be a thermoplastic bonding material which displays its action as a result of heat being supplied, with the result that the bonding material melts and materials which are bearing against one another stick together.
  • Bonding is brought about by cooling to below the melting point of the thermoplastic.
  • the bonding material may also be a material which crosslinks, optionally with heat being supplied, which can no longer be reactivated once it has carried out a bonding action of this type.
  • the moisture- impermeable bottom- layer material may be combined with any desired moisture-permeable top-layer material and moisture-absorption element, and the join between the moisture-absorption element and the moisture-permeable top-layer material may also be of any desired type.
  • this join between the moisture-absorption element and the moisture-permeable top- layer material may be brought about by stitching or stepping/quilting which is known in the prior art. Stepping/quilting involves making up two or more layers, for example of moisture-permeable top-layer material and moisture- absorption element, over the entire surface thereof in a preselected pattern. It is also possible for moisture-permeable top-layer material and moisture-absorption element to be bonded together using, for example, a spot coating layer of bonding material which, as stated above, is a thermoplastic material or a material which crosslinks, optionally with heat being supplied.
  • the invention also relates to a method for forming a washable pad in which a moisture-permeable top-layer material is placed against the top surface of a moisture-absorption element, and a moisture-impermeable bottom-layer material is placed against the bottom surface thereof, and the moisture-permeable top-layer material, the moisture-absorption element and the moisture- impermeable bottom-layer material are joined together to form a single unit, which is characterized in that, between two out of the moisture-permeable top-layer material, the moisture-absorption element and the moisture-impermeable bottom- layer material, over at least part of the mutually facing surfaces thereof, bonding is brought about by supplying heat and/or exerting pressure, while bonding of a different type is brought about between the third out of the moisture-permeable top material, the moisture-absorption element and the moisture- impermeable bottom- layer material and one of the said two, or there is no bonding whatsoever, while the starting material for the moisture-impermeable bottom-layer material is
  • the bonding methods it is possible, by suitably selecting the bonding methods, to provide the washable incontinence pad with a high level of flexibility; optimum fixing of the layers with respect to one another is ensured, and, as will be explained in more detail, the method is suitable for a high degree of automation.
  • the washable pad according to the invention also includes bottom-layer material, or a similar material, in the border regions, and this material bears against and bonds to the top- layer material.
  • the moisture-absorption element used may be any known moisture-absorption element which generally comprises a combination of moisture-absorbent fibres and, if appropriate, a moisture-dispersing layer on one or both sides.
  • a moisture- absorption element such as that which is described in WO-97/34554 in the name of the applicant, in which a moisture- absorption element comprises a mixture of chemical and synthetic fibres which are brought together in a layer, with liquid- dispersing layers of synthetic fibres present on the top and bottom sides of the layer.
  • a moisture-absorption element of this nature typically comprises ⁇ 100%, for example 90-10%, chemical fibres and up to 100, for example 10-90%, synthetic fibres, while one or more liquid-dispersing layers which substantially comprise synthetic fibres are bonded to the top and bottom sides (percentages are by weight) .
  • the liquid-absorbent layer contains 90-60% chemical fibres, such as viscose or modified viscose, and 10-40% synthetic fibres, such as polyester, polyamide, polyacrylate, polypropylene, and the like.
  • chemical fibre is understood to mean a fibre which is based on a natural product, such as cellulose, and has been made into a form which is suitable for human use by means of a chemical treatment.
  • a synthetic fibre is a fibre which is produced from a polymer which is prepared entirely by chemical synthesis and in which there is no natural product base.
  • the top- layer material may also be of numerous types, provided that it exhibits good permeability to moisture and is substantially hydrophobic.
  • the top-layer material is, for example, a knitted fabric comprising fibres, such as polyester, polyamide, polyethylene, etc. It should be noted that good results have also been obtained with mixed materials, such as with synthetic/natural fibres, one example of which is 50%/50% polyester/cotton. It is even possible to use 100% cotton, if the absorption capacity of the absorption element is sufficiently high.
  • Suitable results are obtained, for example, with a polyester knitted fabric which, on the side which comes into contact with the patient, has been roughened so that a soft surface is obtained.
  • the method which is described in general terms above is characterized in that a moisture-absorption element is provided with perforations distributed over its surface, which perforations extend through the entire thickness of this element, and in at least some of the perforations the moisture-permeable top- layer material and the moisture- impermeable bottom- layer material are brought into contact with one another and bonded to one another by supplying heat and/or exerting pressure, so that bonding points are formed.
  • the embodiment described above is eminently suitable for automation in a production line.
  • the moisture-permeable top- layer material, the absorption-body material which is provided with perforations and the moisture- impermeable bottom- layer material are for this purpose fed to a processing unit in the form of webs; by exerting pressure, for example air pressure, contact is brought about between the moisture-permeable top-layer material and the moisture-impermeable bottom-layer material in the region of the perforations; bonding between the said layers is brought about in the region of a selected number of perforations with the aid of the abovementioned techniques, such as welding or adhesive bonding; the assembled web which is formed in this way is divided into pieces in the size of a washable pad by cutting and, in line or off line, a border finish is produced, if necessary, as will be described in more detail below.
  • the border finish may firstly be brought about by making the moisture-absorption element smaller than the moisture- permeable top- layer material and the moisture- impermeable bottom-layer material and by bonding the top-layer material and bottom-layer material together at the borders.
  • the top-layer material which is permeable
  • thermoplastic which contributes to the ease and speed of bonding.
  • this may expediently be carried out in such a manner that the surface area of the moisture-impermeable bottom- layer material is made larger than the surface area of the moisture-absorption element and the moisture-permeable top-layer material, and in the border regions the moisture-impermeable bottom-layer material is turned over onto the moisture-permeable top-layer material and is joined thereto.
  • the border finish in the transverse direction of the web by carrying this finish out after the web has been divided into pieces with a longitudinal border finish, for which purpose a strip of moisture-permeable top-layer material/moisture-absorption material is cut away at the location of the transverse edge. It is also possible to feed pieces of assembled moisture-permeable top-layer material/moisture-absorption element of suitable dimensions to a web of moisture-impermeable bottom- layer material, and the entire border finish can be carried out after the materials which have been assembled to form the pad sandwich structure have been divided into pieces .
  • an assembly is formed from a moisture-absorption element and a moisture-permeable top- layer material which bears against its top surface, and then a moisture-impermeable bottom- layer material is placed against the bottom surface of the moisture-absorption element, a layer of bonding material being provided over at least part of the surface of the moisture- impermeable bottom- layer material, on its side facing towards the moisture-absorption element, after which this moisture- impermeable bottom- layer material is joined to the moisture- absorption element, which forms part of the assembly, by supplying heat and/or exerting pressure.
  • the assembly of a moisture-absorption element and a top- layer material, to which the moisture- impermeable bottom-layer material is joined may, in an expedient embodiment, be formed in a step which precedes the method described above .
  • the moisture-absorption element and the top-layer material can be joined in various ways, for example by: a) stitching; b) stepping/quilting; c) needling; d) joining by means of high-frequency or ultrasonic welding; e) joining using a spot coating layer of bonding material which is present on that side of the top-layer material which faces towards the moisture-absorption element, by supplying heat and/or exerting pressure; and f) joining using a spot coating layer of bonding material on that side of the moisture-absorption element which faces towards the top-layer material by supplying heat and/or exerting pressure.
  • a coating method which differs from the spot coating method will expediently be selected for bonding together the moisture- impermeable bottom-layer material and the moisture-absorption element by means of a bonding agent .
  • thermoplastic material in a first option, it is possible, in a first option, for a thermoplastic material to be present in the interface between top-layer material and moisture-absorption element.
  • the thermoplastic material may form part of the said layers; it may also be applied separately.
  • top-layer material and moisture-absorption element may also be joined together as a result of the presence of a crosslinkable material.
  • crosslinking will generally be brought about under the influence of heat. If a very high speed is not required, it is possible to use materials which crosslink under ambient conditions. In the latter case, pressure will generally be applied in order to hold the materials in good contact with one another during crosslinking of the bonding material.
  • thermoplastic bonding materials which may be mentioned are polyvinyl chloride, polyethylene, polypropylene, polyurethane and the like.
  • bonding materials which crosslink, optionally with heat being supplied which may be mentioned are isocyanates and cyanoacrylates which crosslink under the influence of atmospheric humidity (for example crosslinkable PU) ; epoxy resin/hardener combinations; polyester resin/hardener combinations, etc.
  • the assembly of a moisture-absorption element and a top-layer material is formed at the same time as the moisture-impermeable bottom-layer material and the moisture- absorption element are joined together.
  • the formation of the assembly as referred to above may be carried out in numerous ways, as indicated; in one attractive embodiment, this formation takes place either by using a spot coating layer of bonding material which is present on that side of the top-layer material which faces towards the moisture- absorption element or by using a spot coating layer of bonding material on that side of the moisture-absorption element which faces towards the top-layer material.
  • the (spot) coating of bonding material may be thermoplastic or, as stated above, crosslinkable, optionally under the influence of heat.
  • the bonding material between the top- layer material and the moisture-absorption element and between the moisture- absorption element and the bottom-layer material is thermoplastic
  • a heat treatment if appropriate with the application of pressure, which is used to join the bottom-layer material to the moisture-absorption element in the latter embodiment, is carried out, the thermoplastic bonding material which is present in the interface region between the top-layer - Im material and the moisture-absorption element will also be activated, with the result that the top-layer material and the moisture-absorption element will be stuck together.
  • the bonding material in the boundary layer between the top-layer material and the moisture-absorption element and in the boundary layer between the moisture-absorption element and the bottom-layer material crosslinks under the action of heat, once again the formation of the assembly is brought about and the bottom-layer material is bonded to this assembly in a single heat treatment.
  • the bonding material in both boundary layers is crosslinkable under ambient conditions, it is generally sufficient to apply pressure for a sufficient time.
  • the bonding material which is present in the boundary region between the top-layer material and the moisture- absorption element is generally, if used, present in the form of a spot coating layer, in order to present the minimum possible obstacle to the passage of moisture from the patient side of the pad to the moisture-absorption element.
  • the thermoplastic bonding material which is present as a component of the bottom-layer material may either be present in a spot coating layer or as a completely covering layer.
  • the bottom-layer material may be a moisture-impermeable material such as polyvinyl chloride, polyethylene or polyurethane which is itself thermoplastic or may be a rubberlike non-thermoplastic material which, on the bonding side, is coated with a bonding layer of thermoplastic material.
  • a moisture-impermeable material such as polyvinyl chloride, polyethylene or polyurethane which is itself thermoplastic or may be a rubberlike non-thermoplastic material which, on the bonding side, is coated with a bonding layer of thermoplastic material.
  • the moisture-impermeable bottom- layer material may, if appropriate, be in the form of a layer which reduces the sliding properties and/or a decorative layer.
  • the decorative layer may be obtained by printing or by lamination of, for example, a textile layer.
  • the moisture-impermeable bottom-layer material and the moisture-absorption element it is possible, for example, to select heating and/or the exertion of pressure over the entire surface of the bottom-layer material; however, it is also possible to select heating and/or exertion of pressure in a pattern. In the latter method according to the invention, it is also important to ensure a good border finish of the washable pad.
  • the bottom-layer material is provided with a layer of bonding material over part of its surface, for example in the form of a spot coating layer, it is recommended to provide finishing material which is expediently formed by bottom-layer material or a similar material.
  • the surface area of the bottom-layer material is larger than the surface area of the assembly of the top-layer material and the moisture-absorption element and projects partially beyond this assembly; by folding over the projecting parts and bringing them into contact with the top-layer material, it is possible, by suitable heating and/or exertion of pressure, to join the bottom-layer material to the outside of the top-layer material.
  • heating is also understood to include welding, such as HF or ultrasonic welding.
  • the bonding layer of thermoplastic or crosslinkable material is activated in such a way that bonding has occurred after sticking followed by cooling.
  • separate strips of bottom-layer material are brought into contact with the top side of the top- layer material and the bottom side of the bottom-layer material by being folded over, and this bottom-layer material is then joined to the top-layer material and the bottom-layer material.
  • the bottom-layer material is selected to be of larger surface area than the absorption element and a top-layer material which bears against the latter; the bottom-layer material is folded upwards along the borders of the pad and is fixed around the top surface of the top-layer material using a separate strip of bottom-layer material. The strip of bottom- layer material on one side is bonded to the bottom-layer material which has the bonding layer facing upwards and on the other side it is joined to the top-layer material.
  • Fig. 1 shows a diagrammatic cross-sectional view through a pad according to the invention
  • Fig. 2 shows a border finish of the pad from Fig. 1, in a first embodiment
  • Fig. 3 shows a border finish in a second embodiment
  • Fig. 4 shows a border finish in a third embodiment
  • Fig. 5 diagrammatically depicts an embodiment in which the moisture-permeable top-layer material and the moisture- impermeable bottom-layer material are joined to one another via perforations which are present in the moisture-absorption element ;
  • Fig. 6 shows an embodiment as in Fig. 5, with an alternative border finish.
  • Fig. l shows a diagrammatic cross section through a pad, in which the moisture-absorption element is denoted by 1, the moisture-permeable top-layer material is denoted by 2 and the moisture-impermeable bottom-layer material is denoted by 3.
  • the boundary surface between the moisture-absorption element 1 and the moisture-permeable top-layer material 2 is formed by 4; in the case illustrated, bonding has been effected with the aid of a layer of thermoplastic bonding material which is arranged in the said boundary surface 4 in the form of a spot coating layer.
  • the spot coating layer is expediently applied to that side of the top- layer material 2 which faces towards the moisture- absorption element 1.
  • the boundary surface between the moisture-absorption element 1 and the moisture-impermeable bottom layer 3 is formed by the boundary surface 5.
  • a layer of thermoplastic bonding material is also used to join the moisture-absorption element 1 and the moisture-impermeable bottom layer 3.
  • the layer of thermoplastic bonding material is applied to the bottom layer 3 over the entire surface.
  • the thermoplastic may also be arranged in the form of a pattern.
  • thermoplastic bonding material which is present as a separate layer on the moisture-impermeable bottom layer 3.
  • the entire layer 3 may be made from a thermoplastic material which is the same as the material of the bonding layer. In the latter case, it is possible, by suitably selecting the thickness of the layer 3, to ensure the desired flexibility of the washable pad.
  • the assembly of moisture-absorption element 1 and moisture-permeable top-layer material 2 may obviously also be produced, as described above, by stitching or stepping/quilting.
  • the moisture- impermeable bottom-layer material 3 is joined to the moisture-absorption element 1 with the aid of a layer of thermoplastic bonding material, in which case the layer of bonding material and the moisture-impermeable bottom-layer material 3 may, if appropriate, have the same function.
  • the bonding material used in this embodiment shown in Figure 1 was crosslinkable polyurethane which was applied by spraying. Another application techniques involves screen- printing. Bonding took place by applying a pressure of 2-10 kg/cm 2 and by heating at 135°C.
  • An excellent flexible pad material was obtained both when using a thermoplastic material and when using a curable bonding material .
  • moisture-absorption element 1 and top-layer material 2 it is possible for a plurality of further layers of material to be present, depending on the precise function of the washable pad.
  • Additional layers of material may, for example, be formed by a spacer layer, such as a knitted fabric of synthetic fibres, between the top-layer material 2 and the absorption element 1, in order to prevent the patient/user from suffering bed sores (decubitus) and to shorten the drying time still further.
  • a spacer layer such as a knitted fabric of synthetic fibres
  • a PU foam layer of the type described in Hygienic Products with superabsorbent polyurethane foam; Jeff Patterson, Nonwovens World, April/ May 1999 to be included, for example between the bottom-layer material 3 and the absorption element 1.
  • the PU foam layer consists of hydrophilic PU.
  • Fig. 2 shows the same cross section as that shown in Fig. 1, but in this case, to finish the pad, the moisture- impermeable bottom layer 3 has been folded over so that it bears against the top side of the top-layer material 2, after which the bottom- layer material 3 can be bonded to the top-layer material 2 by means of a heat treatment, so as to form boundary layers 6 and 7. In this way, an excellent liquid-tight border finish is obtained.
  • Fig. 3 shows an alternative form of finish for a washable pad according to the invention, in which a strip 8 of bottom-layer material which is provided with a bonding layer of thermoplastic material is placed against the moisture-permeable top layer 2 and the moisture-impermeable bottom layer 3 by being folded over. Bonding between the strip 8 and the top-layer material 2 and the bottom-layer material 3 is brought about by heat treatment.
  • the strip of material 8 may consist of the same material as the bottom-layer material 3; obviously, it is also possible to select another material with a similar action.
  • This border finish is likewise extremely liquid-tight .
  • Fig. 4 shows yet another variant of a liquid-tight border finish in which the bottom-layer material 3 of the washable pad projects beyond the surface of the moisture- absorption element, is folded upwards and is then fixed to a separate strip 12 of bottom-layer material 3 or similar material on the top side of the top-layer material 2.
  • the pad according to the invention is extremely flexible and pleasant for the patient to use; it can be washed without boiling at 95°C, while sterilization can be carried out in an autoclave at 135°C.
  • the bonding material used was in this case a thermoplastic polyurethane material.
  • thermoplastic material As the bonding layer of thermoplastic material it is possible to select from numerous thermoplastic materials, such as polyvinyl chloride, polyethylene, polyamide, polyurethane, etc.; numerous other materials will be immediately obvious to the person skilled in the art.
  • the invention makes it possible to provide a washable pad which, starting from the separate components or partial assemblies thereof, makes it possible to produce the pad in a fully automated and continuous method.
  • FIG. 5 diagrammatically depicts a washable pad having a moisture-absorption body 21, a top layer 22 of moisture- permeable material and a bottom layer 23 of moisture-impermeable material . Perforations in the moisture-absorption body 21 are denoted by 28.
  • the number of bonding points is not critical, provided that good fixing of the layers 21, 22 and 23 with respect to one another is obtained. In a test, good results were obtained with a tetragonal arrangement of perforations with a side of 10 cm.
  • the moisture-impermeable bottom-layer material 23 is turned over at the borders and is bonded to the top side of the moisture-permeable top-layer material 22 using a bonding surface 26.
  • the bonding points 29 may be formed in numerous ways; thermal, high-frequency or ultrasonic spot welding are attractive options in those cases in which both the moisture-permeable top-layer material 22 and the moisture- impermeable bottom-layer material 23 consist at least to a significant extent of thermoplastic fibres or materials. It is also possible for the border finish to be brought about under the same condition using one of the said welding techniques; with surface contact being used instead of a spot action. If the moisture-absorption element also consists to a large extent of thermoplastic material, it is also possible for the border of the entire pad to be compressed over its thickness so as to fuse together, with the result that a very good moistureproof border is obtained.
  • Figure 6 shows a situation in which the moisture- absorption element 21 is smaller than the moisture-permeable top-layer material 22 and moisture-impermeable bottom-layer material 23 and bonds 29 are also formed in the border regions.
  • the bonds may be made between the two materials directly; bonding can be promoted by the presence of thermoplastic (PE, PP, PU) on the top and/or bottom surface of the moisture- permeable top-layer material 22 at the location of the borders and/or the perforations 28. Due to the moisture-permeable nature of the top-layer material 22, good bonding promotion will also be found when thermoplastic is applied to the top surface of the top-layer material; in the situation represented diagrammatically in Figure 6, thermoplastic was applied to the top surface .
  • PE polyethylene
  • thermoplastic it is preferable for thermoplastic to be applied only to the borders; in addition to promoting adhesion, the application of thermoplastic also causes the top layer to become impermeable to liquid, with the result that excellent closure is obtained at the borders .
  • washable pad for use as such.
  • the washable pad can also function as a sanitary towel, incontinence products, a bib for babies or adults, a medical bandage, an operation pad, etc.
  • This technique can also be employed for the manufacture of washable diapers and washable incontinence pants for adults, and washable cleaning cloths .

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nursing (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laminated Bodies (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

L'invention concerne un coussinet lavable comprenant un élément (21) d'absorption d'humidité, situé entre une couche supérieure en matériau (22) perméable à l'humidité et une couche inférieure en matériau (23) imperméable à l'humidité, le matériau (22) de la couche supérieur, le matériau (23) de la couche inférieure et l'élément (21) d'absorption étant unis les uns aux autres au moins localement en vue de former une unité intégrée. Au moins une partie de la surface du matériau (23) imperméable à l'humidité de la couche inférieure, située du côté de l'élément (21) d'absorption, est recouverte par une couche en matériau de liaison qui lie l'élément (21) d'absorption et le matériau (23) de la couche inférieure. L'invention concerne en particulier un coussinet dans lequel une couche supérieure en matériau (22) perméable à l'humidité et une couche inférieure en matériau imperméable à l'humidité sont unies en des points déterminés à l'aide de trous (28) pratiqués dans le corps (21) d'absorption d'humidité. L'invention concerne également un procédé de fabrication du coussinet lavable susmentionné ainsi que des procédés de finition du bord d'un tel coussinet lavable.
EP00937373A 1999-06-16 2000-05-30 Coussinet absorbant lavable et procede de fabrication Withdrawn EP1194090A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1012368 1999-06-16
NL1012368A NL1012368C2 (nl) 1999-06-16 1999-06-16 Wasbare onderlegger en werkwijze voor het vervaardigen daarvan.
PCT/NL2000/000370 WO2000076430A1 (fr) 1999-06-16 2000-05-30 Coussinet absorbant lavable et procede de fabrication

Publications (1)

Publication Number Publication Date
EP1194090A1 true EP1194090A1 (fr) 2002-04-10

Family

ID=19769404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00937373A Withdrawn EP1194090A1 (fr) 1999-06-16 2000-05-30 Coussinet absorbant lavable et procede de fabrication

Country Status (6)

Country Link
US (1) US20020053108A1 (fr)
EP (1) EP1194090A1 (fr)
AU (1) AU5255500A (fr)
CA (1) CA2413921A1 (fr)
NL (1) NL1012368C2 (fr)
WO (1) WO2000076430A1 (fr)

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Also Published As

Publication number Publication date
AU5255500A (en) 2001-01-02
WO2000076430A1 (fr) 2000-12-21
NL1012368C2 (nl) 2000-12-19
US20020053108A1 (en) 2002-05-09
CA2413921A1 (fr) 2000-12-21

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