EP1181987A2 - Verfahren zum zumindest partiellen Beschichten von Trägermaterialien - Google Patents
Verfahren zum zumindest partiellen Beschichten von Trägermaterialien Download PDFInfo
- Publication number
- EP1181987A2 EP1181987A2 EP01114444A EP01114444A EP1181987A2 EP 1181987 A2 EP1181987 A2 EP 1181987A2 EP 01114444 A EP01114444 A EP 01114444A EP 01114444 A EP01114444 A EP 01114444A EP 1181987 A2 EP1181987 A2 EP 1181987A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- carrier material
- substance
- adhesive
- coating
- 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.)
- Granted
Links
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
- B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
Definitions
- the invention relates to a method for applying liquid or pasty substances, in particular thermoplastics, on a carrier material, the substance by means of a nozzle at least partially applied to the carrier material passing under the nozzle becomes.
- this coating consists of squeegee processes that are open to the environment and that do not use a Apply nozzle. In many cases, this coating is carried out over the entire surface by means of one against a counter-pressure roller around which the web-shaped carrier material to be coated is performed, employed coating nozzle. The one to be coated Substance is transported under pressure from the outlet gap of the nozzle and onto the passing one railway laid.
- adhesives especially preferably self-adhesive compositions used.
- These preferably belong to the material classes solutions, dispersions, prepolymers and thermoplastic polymers on.
- Thermoplastic hot melt adhesives are advantageously used on Based on natural and synthetic rubbers and other synthetic polymers such as examples include acrylates, methacrylates, polyurethanes, polyolefins, polyvinyl derivatives, polyesters or silicones with appropriate additives such as adhesive resins, plasticizers, Stabilizers and other auxiliaries where necessary.
- Your softening point should be higher than 50 ° C, the application temperature is in usually at least 60 ° C, preferably between 100 ° C and 180 ° C, respectively 180 ° C and 220 ° C for silicones.
- the aim is to apply the quantity of substance to the web across the web width to keep as constant as possible.
- Typical geometries are, for example, the hanger distributor or axially extending distribution channels have a significantly larger cross-sectional area than the radially departing, in Direction of the outlet gap further channels.
- the disadvantage is that the rheological Design only for a limited viscosity range of the substance to be coated is valid. If there is a deviation, irregularities in the order quantity arise over the web width.
- the outlet gap in its cross section adjustable.
- a lip is usually the gap by adjusting elements, as already mentioned above, by an elastic deformation forced into the desired position. Again, the adjustment of the equal distribution achieved via a large number of control elements.
- the gap between the nozzle and Back pressure roller significant.
- This gap is made by a movable or swiveling Nozzle set.
- the setting can usually be to the right and left of the lane be done independently.
- Segmented coating nozzles are also used, with each segment a separate inflow of the substance and a separate adjustment of the Feed quantity of the substance has. The latter is done by individual dosing pumps or valves realized per segment. By setting the outlet quantity in segments is the homogeneity of the applied weight over the coating width reached.
- the coating weight is determined by, for example, beta emitters at as many measuring points as control elements while the coating is running and, in the event of deviations from the specified target value, a control signal is output to the respective element.
- Thermobolts and piezo elements are preferably used as control elements.
- a disadvantage is the enormously high mechanical engineering, measurement and control technology as well as the financial outlay required for such a system.
- the calotte At the end of this transport, depending on the rheology of the fluid, the more or less strongly curved surface above the given base area the calotte.
- the ratio of the height to the base of the calotte depends on the ratio of the hole diameter the wall thickness of the sieve drum and the physical properties (flow behavior, Surface tension and wetting angle on the substrate) Fluids.
- pre-metering nozzles for rotary screen printing are similar to that of coating nozzles for full-surface coatings.
- the installation space is very limited here, since the nozzle must find space inside the screen cylinder, which usually has a diameter of only a good 20 cm. Designs of the nozzle are also explained in the documents mentioned above.
- the avoidance of measures for homogenization in sieves with a large open area becomes problematic, since the replenishment function becomes less and less effective here, especially when working with high fluid pressure.
- the object of the invention is to provide a method that is excellent is suitable, viscous liquids with identical application quantity over the entire Apply width of the carrier material by means of a nozzle, the nozzle body bent and to avoid the disadvantages known from the prior art.
- the cross section of the nozzle body is shown in two zones with different temperatures, which are arranged along its longitudinal axis, so that there is a simple line of curvature without turning points.
- the Zones of different tempering in the longitudinal direction of the nozzle in at least three different tempered zones a bending line with at least one turning point generated.
- the zones can be tempered by heating or cooling.
- Corresponding can be heat-carrying or cooling fluids that are in channels accordingly the zoning, or electrical heating elements are used. Peltier elements, radiation or convection heaters are also suitable.
- the fluid to be coated itself is used as the temperature control medium used for at least one zone.
- the carrier material generates a back pressure Device, in particular a roller, is guided.
- the gap can preferably both the deflection in the radial direction to the counter-pressure roller as well as the deflection perpendicular to it.
- it is direct Influence on the size of the gap between nozzle and counter-pressure roller
- the gap remains constant in its vertical projection, the real gap dimension is influenced, however, by the fact that the nozzle lip is tangent to the counter-pressure roller is moved.
- the method is also without the use of a device producing back pressure available; Here, the nozzle is bent perpendicular to the direction of the carrier material.
- the nozzle is movable in its bearings and / or pivotable, ie to the right and left of the web independently of each other move or pivot.
- the application weight is determined by Example beta emitters or infrared thermometers determined at only a few measuring points and in the event of deviations from the specified target value, an actuating signal to the corresponding one Output temperature control device.
- liquids with a dynamic Viscosity of 0.1 to 1000 Pas, preferably 1 to 500 Pas, are coated (measured at 175 ° C (DIN 53 018, Brookefield DV II, Sp 21)).
- inorganic and organic compounds are suitable as substances to be applied, their viscosity by increasing the temperature in the above range can be brought, also dispersions, emulsions, solutions and melts.
- dispersions for the coating of carrier materials with later medical, cosmetic or Adhesives are preferred for technical use, particularly preferred Self-adhesive compositions used.
- Self-adhesive compositions used. These preferably belong to the material classes of Solutions, dispersions, prepolymers and thermoplastic polymers.
- Thermoplastic hot melt adhesives are advantageously used on Based on natural and synthetic rubbers and other synthetic polymers such as examples include acrylates, methacrylates, polyurethanes, polyolefins, polyvinyl derivatives, polyesters or silicones with appropriate additives such as fillers, adhesive resins, Plasticizers, stabilizers and other auxiliaries where necessary.
- Your softening point should be higher than 50 ° C because the application temperature in the Usually is at least 60 ° C, preferably between 100 ° C and 180 ° C, respectively 180 ° C and 220 ° C for silicones. If necessary, post-cross-linking can be carried out UV or electron beam radiation may be appropriate to be particularly advantageous Adjust the properties of the hot melt adhesive.
- hot melt adhesives based on block copolymers stand out through their diverse range of variations, because of the targeted lowering the glass transition temperature of the self-adhesive as a result of the selection of the tackifiers, the plasticizer as well as the polymer molecule size and the molecular weight distribution of the insert components becomes the necessary functional gluing with the skin also in critical areas of the human musculoskeletal system guaranteed.
- the hot-melt adhesive is preferably based for particularly strongly adhesive systems on block copolymers, in particular A-B, A-B-A block copolymers or mixtures thereof.
- the hard phase A is primarily polystyrene or its derivatives
- the soft one Phase B contains ethylene, propylene, butylene, butadiene, isoprene or mixtures thereof, ethylene and butylene or mixtures thereof are particularly preferred.
- Polystyrene blocks can also be contained in the soft phase B, to be precise at 20% by weight. However, 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.
- the targeted blending of di-block and tri-block copolymers is particularly advantageous a proportion of di-block copolymers of less than 80% by weight being preferred.
- the hot-melt adhesive has the following composition: 10% to 90% by weight block copolymers, 5% by weight to 80% by weight 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.
- 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 are preferably hydrocarbon oils, waxes and resins, the oils such as Paraffinic hydrocarbon oils, or the waxes, such as paraffinic hydrocarbon waxes, have a beneficial effect on skin adhesion due to their consistency.
- the oils such as Paraffinic hydrocarbon oils, or the waxes, such as paraffinic hydrocarbon waxes, have a beneficial effect on skin adhesion due to their consistency.
- the hot melt adhesive should have a high tack.
- the function-adapted adhesive force the skin and on the back of the carrier should be present. Furthermore, so it is too does not slip, a high shear strength of the hot melt adhesive is necessary.
- a high shear strength of the hot melt adhesive is necessary.
- the glass transition temperature of the adhesive due to the selection of tackifiers, plasticizers and polymer molecule size and the molecular distribution of the insert components becomes the necessary functional one Adhesion to the skin and the back of the carrier achieved.
- the height The shear strength of the adhesive is determined by the high cohesiveness of the block copolymer reached.
- the good grip is due to the range of resins used, Tackifiers and plasticizers.
- the product properties such as stickiness, glass transition temperature and shear stability can be easily quantified with the help of 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 the viscoelastic component into account.
- the hot-melt adhesive is set in motion at a predetermined temperature between two plane-parallel plates with variable frequencies and low deformation (linear viscoelastic range).
- a high frequency is used for the subjective feeling of tackiness (tack) chosen and a low frequency for the shear strength.
- tack tackiness
- a high numerical value means better tack and poor shear stability.
- the glass transition temperature is the temperature at which amorphous or partially crystalline polymers change from the liquid or rubber-elastic state to the hard-elastic or glassy state or vice versa (Römpp Chemie-Lexikon, 9th edition, volume 2, page 1587, Georg Thieme 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 are at one frequency of 0.1 rad / s a dynamically complex glass transition temperature of less than 15 ° C, preferably from 5 ° C to -30 ° C, very particularly preferably from -3 ° C to -15 ° C, exhibit.
- Hot melt adhesives in which the ratio is preferred according to the invention the viscous part to the elastic part at a frequency of 100 rad / s at 25 ° C is greater than 0.7, especially between 1.0 and 5.0, or hot melt adhesives which is 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 or polygeometric Body shapes have different shapes. Flattened hemispheres are preferred.
- other shapes and patterns are also printed on the carrier material possible, for example a print 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 backing material, but it can also functionally appropriate for the product over the surface of different thicknesses or densities be applied.
- All rigid and elastic fabrics made of synthetic are suitable as carrier materials and natural raw materials.
- Carrier materials are preferred after application the adhesive can be used so that they meet technical requirements or fulfill the characteristics of a functional association.
- exemplary Textiles such as fabrics, knitted fabrics, scrims, fleeces, laminates, nets, foils, foams and Papers listed. These materials can also be pretreated or post-treated become. Common pretreatments are corona and hydrophobizing; common Post-treatments are calendering, tempering, laminating, punching and mounting.
- this must have a certain Have strength and density to prevent the Dome penetrate too far into the carrier material or even penetrate.
- the Calottes and / or polygeometric body shapes after coating on one second carrier material transferred is the second carrier material
- the second carrier material is the actual carrier
- the first carrier material serves as an auxiliary carrier.
- Such an auxiliary can also be carried out in the form of an abhesively coated roller or webbing his.
- a preferred embodiment of the auxiliary carrier is the roller with an abhesive surface.
- the abhesive surface of the roller can consist of silicone or fluorine-containing compounds or plasma-coated separation systems. These can be applied in the form of a coating with a basis weight of 0.001 g / m 2 to 3000 g / m 2 , preferably 100 to 2000 g / m 2 .
- Subsequent calendering of the coated product and / or pretreatment of the carrier, such as corona radiation, for better anchoring of the adhesive layer can be beneficial.
- Treatment of the hotmelt adhesive with electron beam postcrosslinking can also be used or UV radiation to improve the desired Lead adhesive properties.
- the carrier material is preferably at a speed of greater than 2 m / min, preferably 20 to 200 m / min, coated.
- the partial application enables the transepidermal to be removed through regulated channels Water loss and improves the evaporation of the skin when sweating in particular when using air and water vapor permeable carrier materials. This causes skin irritation caused by congestion of the body fluids are avoided.
- the created drainage channels allow drainage also using a multi-layer dressing.
- Breathable backing materials Through the use of breathable coatings in connection with elastic, Breathable backing materials also result in a subjective result from the user pleasant perceived comfort.
- the support material coated in this way has an air permeability of greater than 1 cm 3 / (cm 2 * s), preferably 10 to 150 cm 3 / (cm 2 * s), and / or a water vapor permeability of greater than 200 g / (m 2 * 24h), preferably 500 to 5000 g / (m 2 * 24h).
- the backing material coated on steel has an adhesive force on the back of the backing of at least 0.5 N / cm, especially an adhesive strength between 2 N / cm and 20 N / cm.
- the self-adhesive compositions foamed before they are applied to the carrier material.
- the self-adhesive compositions are preferred with inert gases such as nitrogen, carbon dioxide, Noble gases, hydrocarbons or air or their mixtures foamed.
- foaming has additionally occurred due to thermal decomposition gas-evolving substances such as azo, carbonate and hydrazide compounds as proven suitable.
- the degree of foaming ie the gas content
- the advantageous properties of the foamed self-adhesive coatings such as low adhesive consumption, high tack and good conformability even on uneven surfaces due to the elasticity and plasticity as well as the initial tack can be optimally used particularly in the field of medical products.
- thermoplastic self-adhesive is reacted under high pressure at a temperature above the softening point with the gases provided, for example nitrogen, air or carbon dioxide, in different volume fractions (approximately 10% by volume to 80% by volume) in a stator / rotor system. While the gas admission pressure is greater than 100 bar, the mixed pressures gas / thermoplastic in the system are 40 to 100 bar, preferably 40 to 70 bar.
- the PSA foam thus produced can then enter the coating nozzle via a line.
- the foaming of the self-adhesive and the resulting open Pores in the mass are those with the adhesive when using an inherently porous carrier coated products well permeable to water vapor and air.
- the needed The amount of adhesive is significantly reduced without impairing the adhesive properties.
- the adhesives have a surprisingly high tack (tack) there is more volume per gram of mass and therefore the adhesive surface for wetting the adhesive surface is available and the plasticity of the adhesive is increased by the foam structure.
- the anchoring on the carrier material is also thereby improved.
- the foamed adhesive coating gives, as already mentioned above, the products have a soft and cuddly feel.
- Foaming also generally lowers the viscosity of the adhesive. This lowers the melting energy, and thermally unstable carrier materials can also be used be coated directly.
- Backing materials put the use for medical products, in particular Plasters, medical fixations, wound coverings, doped systems, in particular for those that release substances, orthopedic or phlebological bandages and Tie close.
- the backing material can be coated with an adhesive repellent after the coating process
- Backing material such as siliconized paper, covered or with a Wound dressing or padding.
- the carrier material can be sterilized, preferably gamma sterilized, is.
- Hot melt adhesives are particularly suitable for subsequent sterilization on a block copolymer basis, which do not contain double bonds. This applies in particular to styrene-butylene-ethylene-styrene block copolymers or Styrene-butylene-styrene block copolymers. There are no applications significant changes in the adhesive properties.
- Figure 1 shows a section of a coating unit, according to the invention Process works, the nozzle 1 being bent radially to the counter-pressure roller 6 is.
- the temperature in the heated by the temperature control elements 3 Zone of the nozzle body higher than in the zone heated by the temperature control elements 4.
- Section A-A shows the position of the exit gap 5.
- Figure 2 shows a cross section.
- the carrier material 7 is in a gap between the Nozzle 1 and the counter-pressure roller 6 (direction of rotation 8) out. Through the exit gap 5 the nozzle, the carrier material 7 is coated with a fluid.
- the fluid flows through a distribution pipe 2 lying axially in the nozzle base body 1 via the outlet gap 5 to the coating point.
- the nozzle body is heated by temperature control elements 3 and 4, which are used in the manufacture the deflection different temperature levels in the lower and upper Generate nozzle body.
- Figure 3 shows a section of a coating unit, which according to the invention Process works, the nozzle 1 perpendicular to the radius of the counter-pressure roller is bent.
- the temperature in the temperature control element 3 is heated zone of the nozzle body higher than in that by the temperature control elements 4th heated zone.
- Section A-A shows the position of the exit gap 5.
- Figure 4 shows a section of a coating unit, which according to the invention Process works, the nozzle in several zones along the longitudinal axis of the nozzle is bent radially to the counter-pressure roller. It is in zone 1 and zone 3 the temperature in the lower area of the nozzle body is higher than in the upper area while in zone 2 the temperature in the upper area is higher than in the lower area. The result is a bending line with two turning points.
- the nozzle is mounted on the side on swivel arms that run against stops by means of which the distance between the nozzle and the counter-pressure roller and screen right and left can be set independently.
- the outlet gap of the nozzle has a constant width.
- the counter pressure roller is not actively tempered.
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paints Or Removers (AREA)
- Catalysts (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Nachteilig ist der enorm hohe maschinenbauliche, meß- und regelungstechnische sowie finanzielle Aufwand, der für ein solches System erforderlich ist.
Nachteilig ist auch hier der hohe maschinenbauliche Aufwand.
Problematisch wird allerdings der Verzicht auf Maßnahmen zur Homogenisierung bei Sieben mit großer offener Fläche (> 30 % Durchlässigkeit), da hier die Nachdosierfunktion immer weniger zur Wirkung kommt, insbesondere wenn mit hohem Fluiddruck gearbeitet wird.
Grund für die Nichtberücksichtigung des ersteren ist, daß die Düsenlänge bisher kaum mehr als etwa 50 cm betrug. Führt man jedoch Siebdruckdüsen mit einer Länge von mehr als einem Meter aus, die verfahrensbedingt nur an ihren Enden gelagert sind, ist die Durchbiegung aufgrund des geringen Trägheitsmoments dieser Düsenbauform nicht mehr zu vernachlässigen. Bereits eine Differenz im Spalt zur Gegendruckwalze von nur 0,01 mm hat bei Sieben mit hoher offener Fläche (zum Beispiel 50 %) eine Auftragsgewichtsschwankung von etwa 5 g/m2 zur Folge.
- quer zur Durchlaufrichtung des Trägermaterials der Düsenkörper durchgebogen wird und
- die Durchbiegung durch Temperaturdifferenzen im Düsenkörper induziert wird.
Besonders vorteilhaft bei dieser Variante ist, daß die Durchbiegung der Düse durch Veränderung der Temperierung auch während eines laufenden Rotationssiebdruckbetriebes eingestellt werden kann, wobei die Düse kompakt gebaut werden kann und der maschinenbauliche Aufwand vergleichsweise gering ist.
| 10 Gew.-% bis 90 Gew.-% | Blockcopolymere, |
| 5 Gew.-% bis 80 Gew.-% | Klebrigmacher wie Öle, Wachse, Harze und/oder deren Mischungen, bevorzugt Mischungen aus Harzen und Ölen, |
| weniger als 60 Gew.-% | Weichmacher, |
| weniger als 15 Gew.-% | Additive, |
| weniger als 5 Gew.-% | Stabilisatoren. |
Die Ergebnisse dieser Meßmethode geben Auskunft über die physikalischen Eigenschaften eines Stoffes durch die Berücksichtigung des viskoelastischen Anteils. Hierbei wird bei einer vorgegebenen Temperatur die Heißschmelzklebemasse zwischen zwei planparallelen Platten mit variablen Frequenzen und geringer Verformung (linear viskoelastischer Bereich) in Schwingungen versetzt. Über eine Aufnahmesteuerung wird computerunterstützt der Quotient (Q = tan δ) zwischen dem Verlustmodul (G" viskoser Anteil) und dem Speichermodul (G' elastischer Anteil) ermittelt.
Besonders für medizinische Anwendungen ist ein relativ niedriger Glasübergangspunkt notwendig.
| Bezeichnung | TG niedrige Frequenz | Anschmiegsamkeit niedrige Frequenz/RT | Anfaßklebrigkeit hohe Frequenz/RT |
| Heißschmelzklebemasse A | -12 ± 2 °C | tan δ = 0,32 ± 0,03 | tan δ = 1,84 ± 0,03 |
| Heißschmelzklebemasse B | -9 ± 2 °C | tan δ = 0,22 ± 0,03 | tan δ = 1,00 ± 0,03 |
Die vorteilhaften Eigenschaften der geschäumten Selbstklebebeschichtungen wie geringer Klebstoffverbrauch, hohe Anfaßklebrigkeit und gute Anschmiegsamkeit auch an unebenen Flächen durch die Elastizität und Plastizität sowie der Initialtack lassen sich ganz besonders auf dem Gebiet der medizinischen Produkte optimal nutzen.
Während der Gasvordruck größer 100 bar ist, betragen die Mischdrucke Gas/Thermoplast im System 40 bis 100 bar, bevorzugt 40 bis 70 bar. Der so hergestellte Haftklebeschaum kann anschließend über eine Leitung in die Beschichtungsdüse gelangen.
- Figur 1
- einen Ausschnitt aus einer Beschichtungseinheit, die nach dem erfindungsgemäßen Verfahren arbeitet, wobei die Düse radial zur Gegendruckwalze durchgebogen ist,
- Figur 2
- einen Querschnitt durch die Düse,
- Figur 3
- einen Ausschnitt aus einer Beschichtungseinheit, die nach dem erfindungsgemäßen Verfahren arbeitet, wobei die Düse senkrecht zum Radius der Gegendruckwalze durchgebogen ist,
- Figur 4
- einen Ausschnitt aus einer Beschichtungseinheit, die nach dem erfindungsgemäßen Verfahren arbeitet, wobei die Düse in mehreren Zonen entlang der Düsenlängsachse radial zur Gegendruckwalze durchgebogen ist, wobei sich eine Biegelinie mit zwei Wendepunkten ergibt.
- Verarbeitungstemperatur in Zuführsystem und Düse 120 °C
- Verarbeitungstemperatur im Bereich Sieblöcher 120 °C
- Flächengewicht der Papierbahn 65 g/qm
- Sieb 14 mesh, Lochgröße 0.9 mm
- 2 Elektroheizstäbe im Düsengrundkörper oberhalb des zentralen Verteilrohres Leistung: 12 kW
- 2 Elektroheizstäbe im Düsengrundkörper unterhalb des zentralen Verteilrohres Leistung: 12 kW
- Die oberen und unteren Elektroheizstäbe können in ihrer Temperatur unterschiedlich eingestellt werden.
Claims (12)
- Verfahren zum Auftragen von flüssigen oder pastösen Substanzen, insbesondere Thermoplasten, auf ein Trägermaterial, wobei die Substanz mittels einer Düse zumindest partiell auf das an der Düse entlanglaufende Trägermaterial aufgebracht wird, dadurch gekennzeichnet, daßquer zur Laufrichtung des Trägermaterials der Düsenkörper durchgebogen wird unddie Durchbiegung durch Temperaturdifferenzen im Düsenkörper induziert wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Düse in ihrem Querschnitt und/oder entlang ihrer Längsachse wenigstens zwei unterschiedlich temperierte Zonen aufweist.
- Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß zur Temperierung des Düsenkörpers ein wärmetragendes oder kühlendes Fluid, elektrische Heizungen, Peltierelemente, Strahlung oder Konvektion verwendet wird.
- Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Beschichtungsflüssigkeit selbst zur Temperierung mindestens einer der Zonen verwendet wird.
- Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Düse in ihren Lagerungen beweglich und/oder verschwenkbar ist.
- Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Durchbiegung im wesentlichen senkrecht zum Trägermaterial oder im wesentlichen in oder gegen die Laufrichtung des Trägermaterials erfolgt.
- Verfahren nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß das Trägermaterial entlang einer Gegendruck erzeugenden Vorrichtung, insbesondere einer Walze, geführt wird.
- Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Substanz mittels der Düse durch einen perforierten Zylinder auf das Trägermaterial aufgebracht wird.
- Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Durchbiegung der Düse in Abhängigkeit von der an der laufenden Bahn ermittelten Auftragsmenge der Substanz geregelt wird.
- Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Substanz bei der Verarbeitungstemperatur eine dynamische Nullviskosität von 0,1 Pas bis 1000 Pas, bevorzugt von 1 Pas bis 500 Pas aufweist.
- Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Substanz eine Lösung, eine Dispersion, ein Präpolymer oder ein thermoplastisches Polymer ist, bevorzugt ein Schmelzkleber ist, besonders bevorzugt ein Schmelzhaftkleber ist.
- Verfahren nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß das Trägermaterial eine Walze oder ein Gurtband mit abhäsiver Oberfläche ist, wobei die abhäsive Oberfläche insbesondere aus einer Beschichtung aus Silikone oder Fluor enthaltenden Verbindungen oder plasmabeschichteten Trennsystemen besteht, die ganz besonders mit einem Flächengewicht von 0,001 g/m2 bis 3000 g/m2 aufgetragen wird, bevorzugt 100 bis 2000 g/m2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10039884A DE10039884A1 (de) | 2000-08-16 | 2000-08-16 | Verfahren zum zumindest partiellen Beschichten von Trägermaterialien |
| DE10039884 | 2000-08-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1181987A2 true EP1181987A2 (de) | 2002-02-27 |
| EP1181987A3 EP1181987A3 (de) | 2003-04-16 |
| EP1181987B1 EP1181987B1 (de) | 2004-09-08 |
Family
ID=7652527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01114444A Expired - Lifetime EP1181987B1 (de) | 2000-08-16 | 2001-06-15 | Verfahren zum zumindest partiellen Beschichten von Trägermaterialien |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20020106455A1 (de) |
| EP (1) | EP1181987B1 (de) |
| AT (1) | ATE275440T1 (de) |
| AU (1) | AU5433901A (de) |
| DE (2) | DE10039884A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10301510B2 (en) | 2013-06-24 | 2019-05-28 | Coroplast Fritz Müller Gmbh & Co. Kg | Adhesive tape, in particular, double-sided adhesive tape, and use thereof for attaching to non-polar surfaces |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE50305042D1 (de) * | 2003-07-25 | 2006-10-26 | Hauni Maschinenbau Ag | Einrichtung zum Auftragen einer Masse auf eine Materialbahn |
| DE102010011608A1 (de) * | 2010-03-16 | 2011-09-22 | Sms Schumag Gmbh & Co. Kg | Richtwalze, Richtwalzenanordnung und Zwei-Walzen-Richtmaschine |
| DE102013206886A1 (de) * | 2013-04-17 | 2014-10-23 | Krones Ag | Leimbehälter für Heissleimapplikationen |
| JP2019526653A (ja) * | 2016-07-07 | 2019-09-19 | スリーエム イノベイティブ プロパティズ カンパニー | 光方向転換フィルム用接着剤 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP0288541A1 (de) | 1986-11-10 | 1988-11-02 | Volker Ludwig | Vorrichtung zum auftragen von flüssigen, pastösen oder plastischen substanzen auf ein substrat. |
| EP0384278A2 (de) | 1989-02-22 | 1990-08-29 | Volker Ludwig | Verfahren und Vorrichtung zum Auftragen von flüssigen, pastösen oder plastischen Substanzen auf ein Substrat |
| EP0565133A2 (de) | 1988-08-03 | 1993-10-13 | ZWECKFORM Büro-Produkte GmbH | Vorrichtung zum Auftragen von flüssigen, pastösen oder plastischen Substanzen auf ein Substrat |
| DE4231743A1 (de) | 1992-09-23 | 1994-03-24 | Volker Ludwig | Vorrichtung zum Auftragen von Substanzen auf ein Substrat |
| US5626673A (en) | 1995-04-12 | 1997-05-06 | Nordson Corporation | Static agitator for adjustable slot coater die in a rotary coater |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341388A (en) * | 1964-05-20 | 1967-09-12 | Phillips Petroleum Co | Method and apparatus for the uniform extruding of thermoplastic film |
| US3920365A (en) * | 1972-08-15 | 1975-11-18 | Du Pont | Apparatus for making polymeric film |
| DE3534407A1 (de) * | 1985-09-27 | 1987-04-16 | Hoechst Ag | Verfahren zur herstellung von unverstrecktem thermoplastischem schmelzefilm |
| US4781562A (en) * | 1986-08-12 | 1988-11-01 | Toshiba Kikai Kabushiki Kaisha | Heat displacing type dies |
| DE3823179C1 (de) * | 1988-07-08 | 1989-10-05 | Georg 5620 Velbert De Krebs | |
| DE3915858C1 (en) * | 1989-05-16 | 1990-08-02 | Grafotec Kotterer Gmbh, 8901 Diedorf, De | Applying moisturiser and/or glue band to web - in contactless manner in transverse direction |
| EP0767044A1 (de) * | 1995-10-04 | 1997-04-09 | Extrusion Dies, Inc. | Extrusionsdüse mit Strömungsverteiler-Korrekturvorrichtung |
-
2000
- 2000-08-16 DE DE10039884A patent/DE10039884A1/de not_active Withdrawn
-
2001
- 2001-06-15 AT AT01114444T patent/ATE275440T1/de not_active IP Right Cessation
- 2001-06-15 EP EP01114444A patent/EP1181987B1/de not_active Expired - Lifetime
- 2001-06-15 DE DE50103518T patent/DE50103518D1/de not_active Expired - Fee Related
- 2001-07-10 US US09/902,055 patent/US20020106455A1/en not_active Abandoned
- 2001-07-12 AU AU54339/01A patent/AU5433901A/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP0288541A1 (de) | 1986-11-10 | 1988-11-02 | Volker Ludwig | Vorrichtung zum auftragen von flüssigen, pastösen oder plastischen substanzen auf ein substrat. |
| EP0565133A2 (de) | 1988-08-03 | 1993-10-13 | ZWECKFORM Büro-Produkte GmbH | Vorrichtung zum Auftragen von flüssigen, pastösen oder plastischen Substanzen auf ein Substrat |
| EP0384278A2 (de) | 1989-02-22 | 1990-08-29 | Volker Ludwig | Verfahren und Vorrichtung zum Auftragen von flüssigen, pastösen oder plastischen Substanzen auf ein Substrat |
| DE4231743A1 (de) | 1992-09-23 | 1994-03-24 | Volker Ludwig | Vorrichtung zum Auftragen von Substanzen auf ein Substrat |
| US5626673A (en) | 1995-04-12 | 1997-05-06 | Nordson Corporation | Static agitator for adjustable slot coater die in a rotary coater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10301510B2 (en) | 2013-06-24 | 2019-05-28 | Coroplast Fritz Müller Gmbh & Co. Kg | Adhesive tape, in particular, double-sided adhesive tape, and use thereof for attaching to non-polar surfaces |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE275440T1 (de) | 2004-09-15 |
| AU5433901A (en) | 2002-02-21 |
| DE10039884A1 (de) | 2002-02-28 |
| EP1181987A3 (de) | 2003-04-16 |
| EP1181987B1 (de) | 2004-09-08 |
| DE50103518D1 (de) | 2004-10-14 |
| US20020106455A1 (en) | 2002-08-08 |
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