EP1093502A1 - Objet pourvu partiellement d'un recouvrement autocollant, comportant un adhesif sensible a la pression a deformation permanente - Google Patents

Objet pourvu partiellement d'un recouvrement autocollant, comportant un adhesif sensible a la pression a deformation permanente

Info

Publication number
EP1093502A1
EP1093502A1 EP99926518A EP99926518A EP1093502A1 EP 1093502 A1 EP1093502 A1 EP 1093502A1 EP 99926518 A EP99926518 A EP 99926518A EP 99926518 A EP99926518 A EP 99926518A EP 1093502 A1 EP1093502 A1 EP 1093502A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
carrier material
self
roller
domes
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Withdrawn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
EP99926518A
Other languages
German (de)
English (en)
Inventor
Peter Himmelsbach
Peter Jauchen
Klaus KEITE-TELGENBÜSCHER
Matthias Lehder
Reiner Leutz
Jens Schreiber
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.)
Beiersdorf AG
Original Assignee
Beiersdorf AG
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 Beiersdorf AG filed Critical Beiersdorf AG
Publication of EP1093502A1 publication Critical patent/EP1093502A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/58—Adhesives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/21—Paper; Textile fabrics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24843—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] with heat sealable or heat releasable adhesive layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2738—Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2738—Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
    • Y10T442/2746—Heat-activatable adhesive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2738—Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
    • Y10T442/2754—Pressure-sensitive adhesive

Definitions

  • the invention relates to a method for producing a partially self-adhesive carrier material and possible uses of the carrier material obtainable by the method according to the invention
  • the partial coating of carrier materials with pressure-sensitive self-adhesive compositions is a known technique, be it the self-adhesive compositions in the form of a grid, for example by screen printing (DE-PS 42 37 252), the adhesive domes also being able to be of different sizes and / or different distributions (EP-PS 353 972), or by gravure printing of webs connected in the longitudinal and transverse directions (DE-PS 43 06 649).
  • the preferred degree of wetting of the carrier materials is 40% to 70%.
  • carrier materials which can be removed in particular without residue can be coated with self-adhesive materials
  • DE-OS 196 28 268 describes a self-adhesive, air and moisture permeable flat structure, which discontinuously produced in the form of screen printing, gravure printing or flexographic printing
  • DE-OS 196 28 294 describes a self-adhesive plaster which has been produced with a pressure sensitive adhesive in screen printing, gravure printing or flexographic printing. The adhesive composition is applied in discrete grids
  • EP-OS 0 675 183 describes a method which transfers the pressure sensitive adhesive geometries to a specially cross-linked substrate Derivation for self-adhesive products is not described
  • CH 648 497 The use of a coated roller as an auxiliary carrier for the transfer has already been described (CH 648 497), although self-adhesive products are not dealt with here either.
  • CH 648 497 The possibility of the targeted and permanent deformation of the discrete geometries and of these influencing parameters and devices for setting these parameters are not covered here
  • DE-GM 83 36 583 4 describes a pressure-sensitive adhesive sheet which can be removed again without leaving any residue
  • DE-OS 38 05 223 discloses a pressure-sensitive flat structure with an increasing number of
  • DE-OS 196 20 107 describes an at least partially coated carrier material, the adhesive being a foamed hot melt
  • DE-OS 196 31 422 describes a self-adhesive carrier material with a particularly strong hot-melt adhesive
  • DE-OS 34 33 293 discloses a self-adhesive transparent film and its method
  • domes Coating with domes is not mentioned or, if domes are applied to a carrier material, they are not deformed
  • the carrier materials In the medical sector, there are special requirements for the carrier materials.
  • the materials must be skin-friendly, generally permeable to air and / or water vapor, as well as easy to model and conformable. Because of these requirements, a carrier that is as thin or soft as possible is often preferred.
  • the support materials also require sufficient strength and, where appropriate, limited stretchability during use. Furthermore, the support material should also have sufficient strength and low stretchability after the wetting
  • inelastic carriers with a high degree of strength in the direction of stress are required. This is achieved by using fabrics, usually made of cotton or viscose As a rule, such carrier materials, particularly those with a correspondingly high basis weight, are cost-intensive. A high degree of flexibility can only be achieved by a fabric with a lower strength. In general, however, this shows a certain elongation under stress, which is undesirable for the application
  • the advantage of the grid-shaped application of the adhesive to the carrier material is that the adhesive materials are permeable to air and water vapor if the carrier material is appropriately porous, and are generally easily removable
  • the partial application enables the transepidermal water loss to be drained off, especially in medical applications, through regulated channels and improves the evaporation of the skin when sweating, especially when using air and water vapor-permeable carrier materials.This prevents skin irritation caused by congestion of the body fluids.
  • the created drainage channels enable derivation even when using a multilayer bandage
  • the air and water vapor permeability are reduced correspondingly if the surface coverage of the adhesive layer, which is impermeable per se, is correspondingly reduced, and the consumption of adhesive increases, and if the surface coverage of the adhesive layer is low, the adhesive properties suffer, i.e. the product dissolves, particularly in the case of heavy ones textile carrier materials, too light from the surface, here again in particular from the skin. Permanent bonding is therefore not possible
  • the compositions for processing can be present in a carrier matrix.
  • Common organic or inorganic solvents or dispersants are understood to be carrier matrix
  • Systems without a carrier matrix are referred to as 100% systems and are also not unknown. They are processed in the elastic or thermoplastic state. A common processing state is the melt.
  • hotmelt adhesives have also been described in the prior art. They are based on natural or synthetic rubbers and / or other synthetic polymers
  • An advantage of the 100% systems is that, in terms of process technology, removal of the carrier matrix, that is to say the aids, is avoided, which increases the processing productivity and at the same time reduces the machine and energy expenditure. In this way, the remaining residues of the carrier matrix are reduced, which in turn favors the lowering of the allergenic potential
  • the invention relates to a method for producing a partially self-adhesive carrier material which contains the following method steps a) coating a first carrier material with domes and / or polygeometric body shapes made of self-adhesive, with a1 the application of the self-adhesive to the carrier material at least
  • the surface coverage of the support material is at least 1%, b) permanent deformation of at least some of the domes and / or polygeometric body shapes
  • At least 10%, preferably 50%, very particularly preferably 75% of the domes and / or polygeometric body shapes are permanently deformed. Permanent deformation of all domes is also a particularly preferred variant of the method according to the invention. In certain applications, it may also be desirable that at least one Part of the calottes is deformed so far that they flow together and form a closed film
  • domes and / or polygeometric body shapes are at least partially connected to one another by webs
  • Body shapes on the carrier material can in particular the desired adhesive strength of the
  • Carrier materials are set
  • an undeformed proportion of domes on the carrier material can also be attributed to the fact that some of the domes return to their original state after the deformation
  • the permanent deformation of the domes and / or polygeometric body shapes can take place by a controlled temperature control during the coating and / or by the introduction of radiation, mechanical or secondary energy.
  • One possibility to bring about this permanent deformation is then to feed the coated carrier material into a nip
  • the flats flatten and the base with which the spheres are anchored to the carrier material is flattened in the roller span
  • Partial deformation can be achieved, for example, by using an anilox roller in the nip into which the carrier material is guided in order to carry out process step b) Furthermore, the viscoelastic property profile of the domes and / or polygeometric body shapes can be adjusted by controlling the thermal energy from the coating process, the at least partial introduction of additional energy or the at least partial withdrawal of thermal energy or a combination of the methods
  • the self-adhesive composition is preferably applied to the first carrier material in particular by screen printing, thermal screen printing or gravure printing or by the nozzle process
  • the application of the adhesive to the carrier material of greater than 6 g / m 2 is preferably 20 to 1000 g / m 2 , particularly preferably 40 to 180 g / m 2
  • Support materials are preferred which, after application of the adhesive, can be used in such a way that they fulfill the properties of a functionally appropriate bandage , Foils, foams and papers listed. These materials can also be pretreated or post-treated. Common pretreatments are corona and hydrophobizing, common post-treatments are calendering, tempering, laminating, punching and covering
  • the domes and / or polygeometric body shapes are created during or after the permanent Transferring the deformation to a second carrier material
  • the second carrier material represents the actual carrier
  • the first carrier material serves as an auxiliary carrier.
  • Such an auxiliary carrier can also be designed in the form of an abrasively coated roller or webbing
  • Thermoplastic hotmelt adhesives based on natural and synthetic rubbers and other synthetic polymers such as, for example, acrylates, methacrylates, polyurethanes, polyolefins, polyvinyl derivatives, polyesters or silicones with appropriate additives such as adhesive resins, plasticizers, stabilizers and other auxiliaries can be used for the coating of the carrier material required
  • Your softening point should be higher than 50 ° C, since the application temperature is usually at least 90 ° C, preferably between 100 ° C and 150 ° C, or 180 ° C and 220 ° C for silicones / or electron beam irradiation can be attached in order to set particularly advantageous properties of the hotmelt adhesive compositions
  • hot melt adhesives based on block copolymers are characterized by their wide variety of variations, because the targeted functional lowering of the adhesive components to the skin is also achieved by the targeted lowering of the glass transition temperature of the self-adhesive compositions as a result of the selection of the tackifiers, the plasticizers as well as the polymer molecule size and the molecular weight distribution of the insert components guaranteed at critical points of the human musculoskeletal system
  • the high shear strength of the hotmelt adhesive is achieved by the high cohesiveness of the polymer.
  • the good grip adhesiveness results from the range of tackifiers and plasticizers used
  • the hotmelt adhesive is preferably based on block copolymers, in particular AB, ABA block copolymers or mixtures thereof.
  • the hard phase A is primarily polystyrene or its derivatives
  • the soft phase B contains ethylene, propylene butylene butadiene, isoprene or mixtures thereof, particularly preferably ethylene and butylene or mixtures thereof
  • polystyrene blocks can also be contained in the soft phase B, namely up to 20% by weight.
  • the total styrene content should always be less than 35% by weight. Styrene contents between 5% and 30% are preferred, since a lower styrene content makes the adhesive more supple makes
  • the targeted blending of di-block and T ⁇ block copolymers is advantageous, a proportion of di-block copolymers of less than 80% by weight being preferred
  • the hotmelt adhesive has the composition specified below
  • tackifiers such as oils, waxes, resins and / or mixtures thereof, preferably mixtures of
  • Resins and oils less than 60% by weight plasticizers less than 15% by weight additives, less than 5% by weight stabilizers
  • the aliphatic or aromatic oils, waxes and resins used as tackifiers are preferably hydrocarbon oils, waxes and resins, the oils, such as paraffin hydrocarbon oils, or the waxes, such as paraffin hydrocarbon waxes, having a favorable effect on the skin adhesion due to their consistency Long-chain fatty acids and / or their esters Use These additives serve to adjust the adhesive properties and the stability. If necessary, further stabilizers and other auxiliaries are used
  • the hot-melt adhesive should have a high grip.
  • the function-matched adhesive strength on the skin and on the back of the carrier should also be present. To ensure that the hot-melt adhesive does not slip, there is high shear strength necessary
  • the high shear strength of the adhesive used here is achieved by the high cohesiveness of the block copolymer.
  • the good grip adhesion results from the range of tackifiers and plasticizers used
  • the product properties such as touch sensitivity, glass transition temperature and shear stability can be quantified well with the help of a dynamic mechanical frequency measurement.
  • a shear stress controlled rheometer is used.
  • the results of this measurement method provide information about the physical properties of a substance by taking into account the viscoelastic component
  • the temperature of the hot melt adhesive between two plane-parallel plates with variable frequencies and low deformation (linear visco-elastic range) is caused to oscillate.
  • a high frequency is chosen for the subjective feeling of the grip (tack) and a low frequency for the shear strength
  • a high numerical value means better grip tack and worse
  • the glass transition temperature is the temperature at which amorphous or partially stable polymers change from the liquid or rubber-elastic state to the hard-elastic or glassy state or vice versa (Rompp Chemie-Lexikon, 9 Aufl, Volume 2, page 1587, Georg Thie e Verlag Stuttgart - New York, 1990) It corresponds to the maximum of the temperature function at a given frequency
  • a relatively low glass transition point is particularly necessary for medical applications
  • the hot melt adhesives are preferably set so that they have a dynamic, complex glass transition temperature of less than 15 ° C., preferably from 5 ° C. to -30 ° C., very particularly preferably from -3 ° C. to, at a frequency of 0.1 rad / s - 15 ° C
  • Hot melt adhesives according to the invention are preferred in which the ratio of the viscous portion to the elastic portion at a frequency of 100 rad / s at 25 ° C. is greater than 0.7, particularly between 1.0 and 5.0. or hot-melt adhesives in which the ratio of the viscous component to the elastic component at a frequency of 0.1 rad / s at 25 ° C. is less than 0.6, preferably between 0.4 and 0.02, very particularly preferably between 0.35 and 0, 1
  • the domes and / or polygeometric body shapes applied to the first carrier material preferably have a plasticity / elasticity ratio at a frequency of 100 rad / s of greater than 0.3 to 50 at the time of the deformation
  • the domes or polygeometric body shapes can have different shapes. Flattened shark balls are preferred Other shapes and patterns can be imprinted on the carrier material, for example a printed image in the form of alphanumeric character combinations or patterns such as grids, stripes, as well as accumulations of the calottes and zigzag lines
  • the adhesive can be evenly distributed on the carrier material, but it can also be applied with different thicknesses or densities over the surface to suit the function of the product
  • the method according to the invention for coating the backing material saves adhesive in comparison to a conventional partially coated backing material while the contact surface with the substrate remains the same, or a higher adhesion to the substrate is achieved with the same weight of adhesive composition. This achieves the high permeability which is advantageous for special applications, especially in the medical field Adhesive layer for air and water vapor is not significantly affected
  • the geometric bodies formed from hot-melt adhesive are applied to an auxiliary carrier by screen printing, thermal screen printing or gravure printing or by the nozzle method, in the second step the auxiliary carrier with the bodies are guided to the carrier material, and finally the bodies are permanently deformed and opened by the auxiliary carrier transfer the carrier material
  • auxiliary carrier is intended to mean conventional, endless webs made of different materials, but also devices such as rollers and transfer belts
  • the first carrier material preferably has a surface with a random or regular three-dimensional geometric structure
  • a random or regular three-dimensional geometric structure of the auxiliary carrier such as, for example, a special surface roughness or shape, can have a further influence on the resulting geometry of the permanently deformed hotmelt adhesive spherical cap
  • auxiliary carrier is the roller with an abhesive surface, the abrasive surface of the roller being made of silicone or fluorine-containing compounds or a plasma-coated separation system. These can be in the form of a coating with a basis weight of 0.001 g / m 2 to 3000 g / m 2 exists, preferably 100 to 2000 g / m 2 are applied
  • the abhasive surface of the roller can be set in its temperature between 0 ° C. and 200 ° C., preferably below 60 ° C., particularly preferably below 25 ° C. It is particularly advantageous if the abhesive properties the surface of the roller are adjusted so that the applied self-adhesive also adheres to a cooled roller ( ⁇ 25 ° C)
  • the transfer of the self-adhesive from the roller to the second carrier material can be achieved via a take-off roller that is brought up to the roller.
  • a permanent deformation of the adhesive geometries can follow, but preferably the shape of the spherical caps is carried out simultaneously with the transfer, which is a separate device saved for the deformation
  • a contact pressure can also be specified permanent deformation can be affected
  • a particularly preferred method of transferring the hot melt pressure sensitive adhesive from the abrasive roller to the second carrier material uses a pair of umienkeinchungen that at different positions along the circumference of the abhesive Roll is arranged, the second carrier material is guided a distance along the surface of the abhesive roll. Rollers are preferred as deflection devices
  • This method is particularly advantageous in cooperation with the cooling of the abhesive roller, since after deformation and transfer of the calottes to the roller, which should be parameterizable as explained above for the roller, the material travels a cooling distance on the roller and thus a cohesive break in the hotmelt PSA Detachment from the abrasive surface of the roller is avoided
  • the hotmelt adhesive can also be applied directly to the carrier material
  • thermal screen printing is the use of a rotating, heated, seamless, perforated, round stencil which is fed with the preferred hot melt adhesive via a nozzle.
  • a specially shaped nozzle lip (round or square squeegee) presses the hot melt adhesive fed through a channel through the perforation of the stencil wall onto the passing carrier web This is guided against the outer jacket of the heated sieve drum at a speed which corresponds to the speed of rotation of the rotating sieve drum
  • the small adhesive spheres are formed using the following mechanism
  • the nozzle squeegee pressure forces the hot melt adhesive through the perforated screen onto the carrier material.
  • the size of the spherical caps is determined by the diameter of the sieve hole according to the transport speed of the carrier web (rotation speed of the sieve drum), the sieve is lifted from the carrier Hot-melt adhesive is peeled off sharply or required by the squeegee pressure on the carrier. After this transport has ended, depending on the rheology of the hot-melt adhesive, the more or less strongly curved surface of the dome forms over the specified base area.
  • the ratio of the height to the base of the dome depends on the ratio of the hole diameter on the wall thickness of the screening drum and the physical properties (flow behavior, surface tension and wetting angle on the carrier material) of the self-adhesive
  • the web / hole ratio can be less than 10 1, preferably less than or equal to 1 1, in particular equal to 1 3
  • the described mechanism of formation of the spherical caps preferably requires absorbent carrier materials or at least wettable hot melt adhesive materials.
  • Non-wetting carrier surfaces must be pretreated by chemical or physical processes. This can be done by additional measures such as corona discharge or coating with substances that improve wetting
  • the size and shape of the domes can be defined in a defined manner.
  • the adhesive strength values relevant for the application, which determine the quality of the products produced, are within very narrow tolerances when properly coated.
  • the basic diameter of the domes can be selected from 10 ⁇ m to 5000 ⁇ m Height of the spherical caps from 20 ⁇ m to 2000 ⁇ m, preferably 50 ⁇ m to 1000 ⁇ m, the range of small diameters being intended for smooth carriers or those with larger diameters and larger calotte height for rough or highly porous carrier materials
  • the positioning of the calottes on the carrier is defined by the geometry of the application, which can be varied within wide limits, for example engraving or sieve geometry desired profile of properties of the coating, matched to the different carrier materials and applications, can be set very precisely
  • the carrier material is preferably coated at a speed of greater than 2 m / min, preferably 20 to 200 m / min, the coating temperature being chosen to be greater than the softening temperature
  • the percentage of the area coated with the hot-melt adhesive should be at least 1% and can range up to approximately 99%, for special products preferably 15% to 95%, particularly preferably 50% to 95%. This can optionally be achieved by multiple application if necessary, hot melt adhesives with different properties can also be used
  • Controlled temperature control and / or the introduction of radiation, mechanical or secondary energy during production can result in a geometric modification of the geometrical bodies in the case of thermoplastic self-adhesive compositions, the base diameters being able to be varied within wide limits.
  • Controlled temperature control of the thermoplastic or elastic P ⁇ markalotten can also be preferred , that is to say the domes applied to the auxiliary carrier, take place, for example, by radiation heating such as IR, with the aid of which secondary domes can be produced which have optimal adhesive properties for a doming retention
  • An energy control in the material and / or on the surface of the polymers permits a large variety of polygeometric dome shapes.
  • An adjustable pressure station (gap / pressure / temperature / speed) can be advantageous for the final shaping of the transferred secondary dome. Subsequent calendering can also be advantageous
  • the viscoelastic property profile of the body made of self-adhesive composition which is present before the transfer of the secondary calotte can be adjusted by controlling the thermal energy from the coating process, the at least partial introduction of surface energy or the at least partial removal of thermal energy or a combination of the processes
  • the geometric bodies can accordingly be divided into several zones, which can have entirely different properties.
  • the geometric bodies applied to the auxiliary carrier preferably have in the base zone, which corresponds to the part of the body which adjoins the carrier material, a plast ⁇ z ⁇ tats- / Elast ⁇ z ⁇ tatsverhaltn ⁇ s at a frequency of 100 rad / s from 0.3 to 50
  • the combination of the hot-melt adhesive and the partial coating ensures secure bonding of the carrier material
  • the carrier material is used to manufacture a medical product, it adheres to the skin.
  • at least visually recognizable allergic or mechanical skin irritations are excluded, even when used over a period of several days
  • the partial application enables the transepidermal loss of water to be drained away through controlled channels and improves the evaporation of the skin when sweating, especially when using air and water vapor permeable carrier materials. This prevents skin irritation caused by congestion of the body fluids.
  • the created drainage channels enable derivation even when using a multilayer bandage
  • the coated carrier material has an air permeability of large 1 cn ⁇ 7 (cm 2 * s), preferably 10 to 150 cm 3 / (cm * s), and / or a water vapor permeability of large 200 g / ( m 2 * 24h), preferably 500 to 5000 g / (m 2 * 24h)
  • the carrier material on steel has an adhesive force on the back of the carrier of at least 0.5 N / cm, in particular an adhesive force between 2 N / cm and 12 N / cm
  • the self-adhesive compositions are foamed before they are applied to the carrier material
  • the self-adhesive compositions are preferably foamed with inert gases such as nitrogen, carbon dioxide, noble gases, hydrocarbons or air or their mixtures.
  • inert gases such as nitrogen, carbon dioxide, noble gases, hydrocarbons or air or their mixtures.
  • foaming through thermal decomposition of gas-developing substances such as azo, carbonate and hydrazide compounds has proven to be suitable
  • the degree of foaming ie the gas content, should be at least about 5% by volume and can range up to about 85% by volume. In practice, values of 10% by volume to 75% by volume, preferably 50% by volume, have been retained If work is carried out at relatively high temperatures of approximately 100 ° C and a comparatively high internal pressure, very open-pore adhesive foam layers are created which are particularly well permeable to air and water vapor
  • foamed self-adhesive coatings such as low adhesive consumption, high grip and good conformability even on uneven surfaces due to the elasticity and plasticity, as well as the initial tack, can be used particularly well in the field of medical products
  • breathable coatings in conjunction with elastic, likewise breathable carrier materials results in a wearing comfort that is subjectively pleasant to the user
  • thermoplastic self-adhesive is injected under high pressure at a temperature above the softening point (approximately 120 ° C.) with the gases provided, such as nitrogen, air or carbon dioxide different volume fractions (about 10 vol% to 80 vol%) implemented in a stator / rotor system
  • the mixed pressures gas / thermoplastic in the system are 40 to 100 bar, preferably 40 to 70 bar.
  • the pressure-sensitive adhesive foam produced in this way can then reach the application unit via a line.
  • Commercial nozzles, extruder or chamber systems are used in the application unit
  • the products coated with the adhesive are well permeable to water vapor and air when using an inherently porous carrier.
  • the amount of adhesive required is considerably reduced without impairing the adhesive properties.
  • the adhesives have a surprising effect high tack, since there is more volume per gram of mass and thus the adhesive surface for wetting the surface to be glued and the plasticity of the adhesive is increased by the foam structure. This also improves the anchoring on the carrier material.
  • the foamed adhesive coating as already mentioned above, the products have a soft and supple feel
  • Foaming also generally lowers the viscosity of the adhesives.
  • the melting energy is reduced, and thermally unstable carrier materials can also be coated directly.
  • the outstanding properties of the self-adhesive carrier material according to the invention suggest the use for medical products, in particular plasters, medical fixings, wound dressings, doped systems, in particular for those which release substances, orthopedic or phlebological bandages and bandages
  • the carrier material can be covered with an adhesive-repellent carrier material, such as siliconized paper, or provided with a wound dressing or padding
  • the carrier material is sterilized, preferably ⁇ - (gamma), and is particularly suitable for subsequent sterilization.
  • Hotmelt adhesives based on block copolymers which do not contain double bonds. This applies in particular to styrene-butylene-ethylene-styrene block copolyme ⁇ sate or styrene-butylene -Styrene block copolymers There are no changes in the adhesive properties that are significant for the application
  • FIG. 1 shows a section of a plant that works according to the method according to the invention
  • FIG. 2 shows a supporting material coated with hemispherical domes
  • Figure 3 is a coated with differently shaped domes in the lateral section
  • Carrier material (configuration for reversible gluing)
  • Figure 4 is a coated with differently shaped domes in the lateral section
  • Carrier material (configuration for permanent gluing),
  • FIG. 5 shows a carrier material coated with hemispherical domes in a top view and in a lateral view before the permanent deformation of the domes
  • FIG. 6 shows a carrier material coated with hemispherical domes in plan view and in side view after the permanent deformation of the domes
  • FIG. 7 shows a section of the system when using an abhesive counter-pressure roller
  • FIG. 1 shows a section of a plant that works according to the method according to the invention.
  • the carrier material 1 is guided into a gap between the screen roller 5 and the counter-pressure roller 6.
  • the screen material 5 is used to coat the carrier material 1 with domes from a hotmelt putty Coating the carrier material 1, this is carried into a further nip, which is formed by the counter-pressure roller 6 and a pressure roller 7.
  • FIG. 2 shows a section of an endless support material 1, which is coated with essentially hemispherical domes 2.
  • a base zone 22 can be found, which lies in the region of the dom 2 in which the dom 2 is on the carrier material 1 is anchored, and differentiate the head zone 21 opposite the base zone 22. Both zones 21, 22 may have properties which differ from one another
  • FIGS. 3 and 4 show differently shaped domes 2 in lateral section, which have proven to be particularly advantageous
  • FIG. 3 a carrier material 1 is shown which has a reversible adhesive configuration due to the shape of the spherical caps 2, that is to say the carrier material 1 can be easily removed and re-glued after application to the skin.
  • FIG. 4 shows a carrier material 1 which has an irreversible adhesive configuration due to the shape of the spherical caps 2, ie the carrier material 1 cannot be easily removed after application to the skin, but rather adheres particularly strongly to the skin
  • FIG. 5 shows a carrier material 1 coated with hemispherical domes 2 in a top view and in a lateral view before the permanent doming 2 is deformed
  • FIG. 6 shows a carrier material 1 coated with hemispherical domes 2 in a top view and in a side view after the permanent deformation of the domes 2.
  • the height of the domes 2 has decreased significantly, at the same time the area of the head zone 21 has also increased.
  • the base zone 22 is enlarged compared to the non-deformed domes 2.
  • the domes 2 as a whole penetrated a little deeper into the carrier material 1.
  • First webs are formed in part between the domes 2
  • FIG. 7 shows the system section when using an abhesive counter-pressure roller (6) as an auxiliary support.
  • the hotmelt putty is removed from the counter-pressure roller on a line by means of the carrier material that is guided around the pressure roller (7), while the permanent deformation is carried out by the pressure roller
  • FIG. 8 shows the preferred embodiment of the use of an abhesive counter-pressure roller (6) with a pair of rollers (8, 9) for the deformation and for the transfer of the hotmelt putty
  • an inelastic self-adhesive bandage was produced which, due to its properties described below, can be used as a functional tape dressing, the functional dressing technique being based on anatomy and biomechanics
  • the bandage used for this type of dressing consisted of an inelastic cotton fabric with a high tensile strength of large 60 N / cm and a high tensile strength elongation of less than 20%
  • the self-adhesive was applied by thermal screen printing, the self-adhesive being a hot-melt adhesive.
  • This hot-melt adhesive was composed as follows - an AB / ABA block copolymer, which consists of hard and soft segments, with a ratio of ABA to AB of 2 1 and a styrene content in the polymer of 13 mol%, the proportion of the adhesive is 40% by weight (Kraton G)
  • the components used were homogenized in a thermomixer at 195 ° C
  • the softening point of this adhesive was approximately 85 ° C. (DIN 52011) and the adhesive showed a viscosity of 2100 mPas at 150 ° C. (DIN 53018, Brookfield DV II, Sp 21).
  • the glass transition temperature was -7 ° C. using the method set out above
  • the PSA geometry according to the invention was implemented by means of the described transfer of the PSA caps from an auxiliary carrier to the carrier material
  • Indirect coating was carried out at 15 m / min at a temperature of 120 ° C on a release paper (auxiliary carrier) and from there onto the carrier material. Shortly before the carrier material was supplied, energy was supplied to the adhesive with radiation. This led to a favor on the Auxiliary adhesive adhesive spherical cap in a zone with high plasticity and low elasticity and in a base zone with low plasticity and high elasticity In between, a transition zone was established
  • the low viscous head zone easily penetrated into the backing material and there ensured good anchoring of the adhesive dome, the highly viscous zone lay down on the backing material and controls the adhesive properties of the products
  • the degree of deformation of the highly viscous zone can be set precisely by means of a suitable pressure control in the transfer gap.
  • the deformation can be driven up to a full-surface coating image
  • the lamination gap used in the example is 0 95 mm. It is therefore not a known calendering process in which the gap dimension due to the elastic Effects is less than the thickness of the calendered carrier material, but rather a kind of spreading of the calottes under the action of the lamination gap and web tension, for which the described exact setting of the viscoelastic property profile of the calotte is an unconditional requirement
  • the carrier material was coated with 120 g / m 2 , using a 14 mesh HX stencil
  • the bandage produced by this process showed a reversible detachment from the skin and good air and water vapor permeability. Due to the high shear stability of the hotmelt PSA, sufficient stabilization and a good proprioceptive effect were found. No skin irritation was observed after removing the bandage

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Hematology (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne un procédé de production d'un matériau support pourvu partiellement d'un revêtement autocollant, comprenant les étapes suivantes: a) application, sur un premier matériau support, d'un revêtement constitué d'un adhésif sensible à la pression, sous la forme de calottes et/ou de corps polygéométriques, de telle sorte que a1) la couche d'adhésif sensible à la pression appliquée sur le matériau support soit d'au moins 3g/m2 et que a2) la surface occupée par cet adhésif sur le matériau support soit d'au moins 1 %; et b) déformation permanente d'au moins une partie des calottes et/ou des corps polygéométriques.
EP99926518A 1998-06-12 1999-06-08 Objet pourvu partiellement d'un recouvrement autocollant, comportant un adhesif sensible a la pression a deformation permanente Withdrawn EP1093502A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19826093A DE19826093A1 (de) 1998-06-12 1998-06-12 Partiell selbstklebend ausgerüsteter Gegenstand mit dauerhaft verformter Selbstklebemasse
DE19826093 1998-06-12
PCT/EP1999/003918 WO1999066001A1 (fr) 1998-06-12 1999-06-08 Objet pourvu partiellement d'un recouvrement autocollant, comportant un adhesif sensible a la pression a deformation permanente

Publications (1)

Publication Number Publication Date
EP1093502A1 true EP1093502A1 (fr) 2001-04-25

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EP99926518A Withdrawn EP1093502A1 (fr) 1998-06-12 1999-06-08 Objet pourvu partiellement d'un recouvrement autocollant, comportant un adhesif sensible a la pression a deformation permanente

Country Status (5)

Country Link
US (1) US6858110B1 (fr)
EP (1) EP1093502A1 (fr)
AU (1) AU751003B2 (fr)
DE (1) DE19826093A1 (fr)
WO (1) WO1999066001A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP1210183B2 (fr) † 1999-08-31 2007-10-31 3M Innovative Properties Company Procede de revetement adhesif et article revetu d'un adhesif

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US7163740B2 (en) * 2001-06-02 2007-01-16 The Procter & Gamble Company Process for printing adhesives, adhesive articles and printing equipment
FR2832595B1 (fr) * 2001-11-26 2004-03-19 Lainiere De Picardie Bc Procede de fabrication d'un entoilage thermocollant avec points de polymere thermofusible et polymere thermofusible specialement concu pour la mise en oeuvre dudit procede
US20050163978A1 (en) * 2004-01-27 2005-07-28 Esben Strobech Article having a surface showing adhesive properties
US8507081B2 (en) * 2004-01-27 2013-08-13 Coloplast A/S Absorbing article with zones of different surface properties
DE102004032391A1 (de) * 2004-07-02 2006-01-26 Tesa Ag Zumindest teilflächig mit Selbstklebemasse ausgerüstetes Flächengebilde
US20080032099A1 (en) * 2006-07-20 2008-02-07 Elmer's Products, Inc. Heat activated art mounting sheet
US8728602B2 (en) * 2008-04-28 2014-05-20 The Charles Stark Draper Laboratory, Inc. Multi-component adhesive system
CN109266234B (zh) * 2018-09-07 2021-05-11 江苏科麦特科技发展有限公司 一种水性热熔胶包带的涂布工艺

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CH648497A5 (en) * 1982-09-24 1985-03-29 Billeter Kunststoffpulver Ag Device for surface coating, directly or according to the transfer printing principle, a substrate
DE3829077A1 (de) * 1988-08-27 1990-03-01 Beiersdorf Ag Selbstklebender gegenstand
DE19628268A1 (de) 1996-07-12 1998-01-15 Zweckform Buero Prod Gmbh Selbstklebendes, luft- und feuchtigkeitsdurchlässiges Flächengebilde
DE19631422A1 (de) * 1996-08-06 1998-02-12 Beiersdorf Ag Selbstklebend ausgerüstete Trägermaterialien
DE19751873A1 (de) * 1997-11-22 1999-08-05 Beiersdorf Ag Partiell selbstklebend ausgerüstetes Trägermaterial

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1210183B2 (fr) † 1999-08-31 2007-10-31 3M Innovative Properties Company Procede de revetement adhesif et article revetu d'un adhesif

Also Published As

Publication number Publication date
AU4374099A (en) 2000-01-05
AU751003B2 (en) 2002-08-08
US6858110B1 (en) 2005-02-22
WO1999066001A1 (fr) 1999-12-23
DE19826093A1 (de) 1999-12-23

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