Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
  • B65H19/102—Preparing the leading end of the replacement web before splicing operation; Adhesive arrangements on leading end of replacement web; Tabs and adhesive tapes for splicing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/18—Handling of layers or the laminate
• • 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
  • C09J7/29—Laminated material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/417—Handling or changing web rolls
  • B65H2301/4176—Preparing leading edge of replacement roll
  • B65H2301/41766—Preparing leading edge of replacement roll by adhesive tab or tape with cleavable or delaminating layer
• • 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
  • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
  • C09J2203/342—Applications of adhesives in processes or use of adhesives in the form of films or foils for flying splice applications
• • 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
  • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
  • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
  • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
• • 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
• • 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
  • C09J2400/00—Presence of inorganic and organic materials
  • C09J2400/20—Presence of organic materials
  • C09J2400/28—Presence of paper
  • C09J2400/283—Presence of paper in the substrate
• • 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
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
• • 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.]
  • Y10T428/24851—Intermediate layer is discontinuous or differential

Definitions

• the invention relates to the use of a splicing tape for equipping a wound bale for flying reel change, a splicing method and the splicing tapes used in this method.
• bales Flat, sheet-like materials, especially paper, are wound into bales. Such bales are fed, for example, to paper processing machines or printing or packaging machines. In the continuous operation of such systems, it is necessary to attach to the end of a first bale of the flat, sheet-like material in flying change the beginning of a new wound bale and connect in a suitable manner without having to stop the high-speed machines when changing roles. This process is referred to as splicing.
• double-sided adhesive self-adhesive tapes are used in the paper industry, which consist essentially of a carrier layer and two self-adhesive layers to make a connection between the end of the old material web and the beginning of the new material web. The end of the old material web is glued to the beginning of the new web.
• Adhesive tapes with a splittable system are also known, comprising a material which separates under normal force stress between the upper and lower sides.
• EP 1 076 026 A2 describes a splicing tape with a fixing aid, wherein the fixing aid consists of a carrier material which is formed from two laminar materials laminated together, wherein the lining forms a predetermined breaking point, and wherein the fixing aid is provided with pressure-sensitive adhesive on its underside.
• EP 1 640 301 A1 likewise describes an adhesive tape for producing a connection during flying reel change with a splittable system, the splittable system consisting of two separable ones Layers exists. An adhesive tape for producing a splice connection is further described in EP 1 630 1 16 A2.
• This adhesive tape contains a carrier material which is coated on the upper side with a self-adhesive and on the opposite side with a splittable system, the fissile system opens along a parting plane between two layers.
• Another splicing tape is described in EP 1 318 962 B1, wherein this tape contains two substrates which are separably interconnected via an adhesive layer.
• splitting force To overcome the gap strength at the front edge, an increased, maximum force is required for splitting the system (splitting force). Furthermore, one needs a force at a lower level for splitting across the entire width of the Splicebandes (further splitting force).
• the product of the force times the width of the gap system is the work needed for splitting (splitting work).
• the splitting force In the case of a full - area system, on the one hand, the splitting force must be set so high that the product does not open prematurely due to the centrifugal forces and aerodynamic forces acting on the acceleration, on the other hand the gap work must be set so low that the work required for the complete splitting of the Splitting system does not lead to demolition. Especially with full-surface gap systems, this compromise is difficult to set. This problem is particularly relevant for thin and thus sensitive systems to bear.
• the present invention provides a solution to the aforementioned problems by providing a new splicing tape having side-by-side liner tabs.
• the present invention relates to the use of a splicing tape for equipping a wound bale for flying reel change, wherein (a) the splice tape comprises first and second carriers and at least two laminating mass strips interposed therebetween, each connecting the first carrier to the second carrier, wherein the carriers have on their side facing away from the Kaschiermassestsammlung a first or second pressure-sensitive adhesive layer, wherein the KaschiermassestNeill are arranged side by side and each form a predetermined breaking point;
• transition region from the uppermost to the second uppermost position of the bale means the region of the bale in which the uppermost layer of the wound bale ceases and the second uppermost layer of this bale begins.
• this area includes the transition from top to two top position of the bale.
• the splice tape is thus glued so that the second pressure-sensitive adhesive layer covers said transition.
• the second pressure-sensitive adhesive layer thus forms, together with the bale, a second bonding surface which covers the transition from the uppermost to the second uppermost layer of the bale.
• the beginning i. understood the exposed end of the wound bale.
• the invention further relates to the splicing tapes used, wound bales comprising the splice tapes, ie equipped with them, and a splicing method, comprising the use of said splicing tapes, in which the splicing tape is glued to the bale such that a portion of the first pressure-sensitive adhesive layer forms a first bonding surface with the end region of the uppermost layer of the wound bale and the second pressure-sensitive adhesive layer in the transition region from upper to second uppermost layer of the bale forming a second bonding surface with the bale located in part below the first bonding surface, the first bonding surface extending within the two longitudinal edges in the longitudinal direction of the splicing tape, and the portion of the first pressure-sensitive adhesive layer not wrapping a bonding surface with the end region of the uppermost layer of the spliced tape Bale forms, exposed for the adhesive coupling to a fast moving web of another, rolling bale, the paper roll thus equipped accelerates to the same rotational speed as the rolling bale and against
• the splice tapes used according to the invention have at least one first and one second carrier, and at least two Kaschiermassestsammlung arranged therebetween, which connect the first carrier with the second carrier, wherein the carrier on its side facing away from the Kaschiermassestsammlung each have a pressure-sensitive adhesive layer, wherein the KaschiermassestAlb side by side are arranged and each form a predetermined breaking point.
• the two carriers, z. B. in the form of two webs, laminated together.
• at least two laminating mass strips can be applied to one of the two carriers for this purpose first, before the other carrier is applied. This composite is then coated on the now outer sides, that is above and below, each with a pressure-sensitive adhesive.
• the coating with pressure-sensitive adhesives can also be carried out before the application of the laminating compound. In this case, however, it is necessary to cover the adhesive in each case with a liner.
• the pressure-sensitive adhesive layers preferably extend over the entire carrier material over the whole area. Also conceivable is a substantially full-surface coating of the carrier, which in each case means an 80-95% coverage of the carrier with a pressure-sensitive adhesive layer.
• only a partial application of the PSAs to the carrier is conceivable.
• one or both sides of the composite, ie both pressure-sensitive adhesive layers can now be coated with a release paper (liner). As laminating z.
• Example which contains weakly effective silicone-free and, if necessary, elastifying additives in addition to a binder. It is important to ensure that the dried films have no adhesive force even at higher temperatures, so that the exposed after cleavage surfaces do not pollute machine parts or production goods or stick to it. For use in paper machines, it is desirable that all components of the splice tape not interfere with the repulping of papers. Splicing zones cut out during further processing can then be easily repulped. Therefore, water-based compositions of the laminating composition which contain conventional auxiliaries in papermaking are particularly advantageous. For example, modified starches can be used as binders, or binders such as have been used for wet adhesive tapes for a long time.
• stearyl derivatives such as Ca stearate or dispersions of polymeric release agents, for example dispersions based on copolymers of stearyl methacrylate or stearyl derivatives of maleic acid with styrene, can be used as release agents.
• elastifiers for example, water-soluble polyglycols can be used.
• aqueous preparations with 10 to 90% by weight of binder and 10 to 90% by weight of release agent and up to 60% of elasticizing agent can be used as laminating compound.
• binders preference is given to using starch derivatives, for example anionic potato starch, in proportions of 30-70% by weight.
• the laminating composition is preferably coated with a suitable for aqueous dispersions applicator on a paper support or the like and covered in the wet state with a second paper support or the like and then dried. If necessary, the usual measures in papermaking, such as rewetting, smoothing and leveling of the produced composite can be used.
• the layer thickness of the laminating compound after drying is preferably in the range of 3 to 20 g / m 2.
• the individual Kaschiermassestographie which are arranged according to the invention side by side and are provided to produce the desired breaking point, each in the form of a flat dense or partial, not full-surface, i. non-dense dense application can be formed.
• the KaschiermassestAlb be applied by means of anilox rollers, screen printing, flexographic printing on one of the carrier and wet laminated together with the second carrier web and dried.
• the geometry of the screen or of the anilox roller or flexographic printing plate can be chosen such that discrete coated areas are formed which are not pressed together to form a full surface during lamination.
• the KaschiermassestNeill consist in this case of small discrete points. Alternatively, a full-area coating can be achieved with the coating techniques mentioned.
• a full-surface coating can also be done in the strip line by means of wire bar ( Mayer-bar) or nozzle coating.
• the screen design specifies the layer thicknesses of the laminating strips. Preference is given to using screens with 14 to 100 mesh and 7% to 60% penetration.
• the coating amount of dried laminating compound is adjusted in the range 2 - 20 g / qm.
• higher viscosity pasty, non-foaming aqueous formulations are used whose solids content is e.g. consists of anionic potato starch.
• Elastifiringde additives such as polypropylene or polyethylene glycols and / or release agents can be used in amounts that are compatible with the main component with.
• the adjustment of the splitting forces, i. Cleavage force and splitting power, is given in addition to the proportion of release agent by Siebdesign and solids concentration.
• the elastic content in the flow behavior of the aqueous preparation must be kept low so that stringing is avoided. This can be achieved for example by adding talc or small amounts of finely divided silica gel or other thickeners.
• the engraving of the anilox roller specifies the layer thickness of KaschiermassestAlb. Preference is given to anilox rollers with cross-diagonal engraving, in particular at an angle of 45 °, in order to apply individual laminating mass strips.
• the volumes of the engravings are preferably in the range 25-60 cm 3 / m 2 .
• anilox rollers with line rasters with 10 - 30 lines / cm can be used, the volume of which is preferably in the range 30 - 90 cm 3 / m 2 .
• the synchronization between paper carrier and anilox roller is preferred.
• flowable, non-foaming aqueous preparations are used whose solids content is e.g. consists of anionic potato starch.
• Elastifitearingde additives such as polypropylene or polyethylene glycols and / or release agents can be used in amounts that are compatible with the main component with.
• the adjustment of the splitting forces, i. Anspaltkraft and splitting power is given in addition to the proportion of release agent by engraving the anilox roller and solids concentration.
• the laminating within the KaschiermassestAlb may have different splitting forces under each other.
• the widths of the different laminating mass strips are set differently for this purpose.
• the backing strip in the direction of application of the splicing tape is made wider than that in the application direction, i.e., in the direction of application. first Kaschiermassestsammlung or as the remaining KaschiermassestAlb.
• the width of the individual laminating mass strips is preferably in a range of 5 to 15 mm, more preferably in a range of 7 to 10 mm.
• the splitting forces of the laminating mass strips are adjusted in a substantially identical width by the use of different laminating masses.
• the layer thicknesses differ between the laminating mass strips, as a result of which the splitting forces can likewise be set to different values.
• the KaschiermassestAlb are arranged in such a way between the first and second carrier of Splicebandes that they themselves are not in direct contact with each other. This means that the KaschiermassestNeill are arranged at a certain distance from each other. The distance of the KaschiermassestAIN results from the width of the Splicebandes and the width of the individual KaschiermassestLite.
• the Kaschiermassest shapes are arranged as far away from each other as possible. This causes the effect that the time interval between the splitting of the individual Kaschiermassestsammlung when flying role change is as large as possible.
• the KaschiermassestAlb arranged side by side to two KaschiermassestAlb which are arranged to each other at said distance.
• the laminating mass strips cover less than 80% each of the surfaces of the first and second carriers of the splicing tape which bond them together, preferably less than 70%, more preferably less than 60%.
• the splitting force required for splitting the front that is to say the first laminating strip of the splicing tape, when the resulting split halves are at an angle of 90 ° to the laminating composite, ie at an angle of 90 ° to the direction of application of the splicing tape at a speed of 300 mm / min, 75 cN per centimeter bond width, preferably 70 cN, more preferably 65 cN, and the work required to split the front application tape in the direction of application maximum 50 Nmm (measured at 23 ° C and 50% rl_f using a Zwick Roell Z2.5 measuring instrument, whereby for the measurement a 5 cm wide strip of a splicing tape, whose two laminating strips have a width of 10 mm, is glued across the measuring direction on the T-block of the measuring instrument and the upper adhesive layer with commercial 80 g / m 2 copying paper was covered, which for measurement in the jaw was clamped).
• the splitting force and splitting work required for splitting is to say the first
• the Kaschiermassesteria can represent straight stripes or have, for example, a wave-like course.
• the Kaschiermassestsammlung are in the form of straight strips.
• the laminating mass strip formed from the laminating compound in the direction of application, does not terminate flush with the carriers coated with pressure-sensitive adhesive. In the application direction, ie in the direction of rotation of the equipped with the Spliceband bale, this gap strip is engaged, ie slightly offset to the rear.
• the offset of the front Kaschiermassest shapes with respect to the front edge in the application direction of the wearer of the Splicebande up to 20 mm, preferably up to 15 mm, for example 1 to 3 mm, particularly preferably 2 mm.
• carrier any carrier materials, in particular carrier papers or films can be selected, wherein the first and the second carrier according to the invention may be the same or different.
• the carrier which is coated in the provision of the splicing tape according to the invention with the KaschiermassestAlb selected so that a coating of the laminating composition is easily possible.
• paper is used as the carrier material, which is selected so that the laminating mass penetrates into the paper without penetrating it.
• the first and / or second carrier of the splicing tape are paper carriers.
• the grammage of the individual carriers is preferably in a range of 30 to 80 g / qm.
• the thickness is preferably in a range of or 30 to 100 ⁇ .
• the carrier materials should be selected as thin as possible. The thinner a splicing tape is, the less the tape disturbs the machine pass.
• the thickness of the individual carriers is above the stated range, problems may occur during the passage through the machines, depending on the process. However, if the carrier thickness is below the stated range, unwanted breaks may occur depending on the web tension if the tensile strength of the adhesive tape is lower than the web tension in the processing machine.
• machine-smooth paper having a thickness of 30 ⁇ m to ⁇ , preferably 40 ⁇ m to ⁇ , particularly preferably 50 ⁇ m, has proven to be suitable as carrier material.
• thicker carrier materials can also be used.
• Kaschiermassen for KaschiermassestAIN hot melt adhesive, preferably repulpable materials based on Polyvenylpyrolydon and or corresponding copolymers or Hydroxylpropylzellulose with polar waxes, resins and release waxes such.
• stearic acid and if necessary mixed with preferably water-soluble plasticizers.
• the hotmelt adhesive should have as high softening ranges above 120 ° C, so when in contact with hot drying cylinders z. B.
• pressure-sensitive adhesive for the first pressure-sensitive adhesive layer is preferably a chronologically tackige, preferably repulpable adhesive used.
• Hochtackig in this context means that the pressure-sensitive adhesive in the final product has a rolling ball tack of less than 40 mm.
• the respective pressure-sensitive adhesive is applied to a standard polyester support (thickness 23 ⁇ m) with a PSA layer thickness of 50 g / m 2. An approximately 10 cm long strip of tape is attached with the adhesive side up horizontally on the test plane.
• a sample ball of steel (diameter: 1 1 mm, mass: 5.6 g) is cleaned with acetone and kept for 2 h in a room atmosphere (temperature: 23 ° C +/- 1 ° C; relative humidity: 50% +/- 1 %).
• the steel ball is accelerated by rolling down from a 65 mm high ramp (inclination angle: 21 °) in the gravitational field of the earth. From the ramp, the steel ball is directed directly onto the sticky surface of the sample. The distance traveled on the adhesive until the ball stops, ie the rolling ball tack, is measured. The respective measured value results (as length specification in mm) from the mean value of five individual measurements.
• the layer thickness of the first pressure-sensitive adhesive layer is preferably 30-60 g / m 2 .
• an adhesive comprising 25-45 wt .-% of a copolymer (a) and 55-75 wt .-% of a plasticizer (b), wherein the copolymer (a ) is obtainable by copolymerization of a mixture comprising 30-70% by weight of acrylic acid, 15-35% by weight of butyl acrylate and 15-35% by weight of ethylhexyl acrylate, and wherein the plasticizer (b) used is an ethoxylated C16-C18-alkylamine which preferably has 15 to 25 ethoxy units in the alkyl radical, for example Ethomeen C / 25® from Akzo Nobel.
• a shear-proof pressure-sensitive adhesive is preferably used, which is preferably also repulpable.
• a high-shear pressure-sensitive adhesive is understood as meaning a pressure-sensitive adhesive which has a static shear strength of more than 400 minutes on coated base paper and more than 1000 minutes on intaglio paper at 23 ° C. and 55% relative humidity. Humidity has.
• the adhesives to be tested are applied to a standard carrier (polyester film thickness: 25 ⁇ " ⁇ ) with a mass application of 25 g / m 2.
• a strip of 13 mm width and at least 20 mm length is applied cut and bonded to a defined paper (eg rotogravure paper Neopress T 54, 54g / m 2 , or coating paper Mediaprint, 135g / m 2 , the company Stora Enso) .
• the bonding surface is 13mm x 20mm
• the test specimen is rolled over twice slowly with a 2 kg roller and the test specimen is loaded at 23 ° C and 55% relative humidity with a weight of 1 kg parallel to the bonding plane and the time taken for the adhesive tape to reach the adhesive is measured Paper remains.
• the shear-strength PSA used for the second pressure-sensitive adhesive layer of the splicing tape is an acrylate self-adhesive comprising 25-45% by weight of a copolymer (a ' ) and 55-75% by weight of a plasticizer (b ' ) as plasticizer (b ' ) an ethoxylated C16 to C18 alkylamine is used which preferably has 15 to 25 ethoxy units in the alkyl radical, for example Ethomeen C / 25® from Akzo Nobel.
• the copolymer (a ' ) is obtainable in a free-radical polymerization reaction in polar solvents with ethanol as regulator, optionally under Use of an aluminum chelate as crosslinker (0.3 to 1, 2 wt .-%, based on the total amount) of a monomer mixture comprising 40-90 wt .-% acrylic acid and up to 60 wt .-% butyl acrylate and optionally up to 30 Wt .-% ethylhexyl acrylate.
• a preferred copolymer (a ' ) is obtainable from a monomer mixture comprising 40-90% by weight of acrylic acid and 10-60% by weight of butyl acrylate.
• a likewise preferred copolymer (a ' ) is obtainable from a mixture comprising 40-90% by weight of acrylic acid, 15-35% by weight of butyl acrylate and 15-35% by weight of ethylhexyl acrylate.
• the layer thickness of the second PSA layer is preferably 15-30 g / m 2 .
• the first and / or second pressure-sensitive adhesive layer are arranged over the entire surface of the first or second carrier of the splicing tape.
• the pressure-sensitive adhesive layers are coated with a release liner, i. occupied with separating carrier material, for. B. with both sides separating carrier material such. As siliconized paper.
• a carrier material which separates on both sides is used. It is sufficient in this case to use only such a carrier material, i. only to shoot a single liner and to wrap the so occupied Spliceband to roles.
• the splicing tape can be provided according to the invention in various embodiments.
• the width of the splicing tape is not particularly limited, but is preferably in a range of 20 mm to 100 mm, more preferably in a range of 30 mm to 80 mm, particularly preferably 38 mm - 75 mm. This width is particularly suitable for use with flying reel change.
• very fast-running machines paper-making coaters
• difficult-to-bond sheet-like materials e.g. Nonpolar films such as PE or PP
• wider splice tapes are needed.
• the width of the spliceband can be reduced.
• FIG. 1 shows a lateral, schematic view of a splicing tape which is used according to the invention.
• Figure 1 shows a splicing tape (10) with two carriers (14, 15), which are laminated together by means of two Kaschiermassestsammlung (17).
• a first pressure-sensitive adhesive layer is applied (13). Since this produces in the subsequent application, the contact between the running path of the rolling bale and new material web of the wound bale, this adhesive is advantageously set fructig.
• a second pressure-sensitive adhesive layer (16) is applied to the paper carrier (15).
• the pressure-sensitive adhesive used for this purpose has a high shear strength.
• the adhesive layer 13 is covered with a separation medium (1 1).
• the separation medium 1 1 has a slot (12), so that, by separate removal of the two separation media (1 1 a, 1 1 b), two defined areas on the adhesive 13 are formed.
• first of all the smaller area (11a) can be pulled off, and the end area of the uppermost layer of the wound bale is adhesively bonded to the partial area of the adhesive layer 13 exposed underneath.
• the second pressure-sensitive adhesive layer (16) to the transition from upper to second uppermost layer of the bale, i. in the transition region from upper to second uppermost position of the bale, then the larger area (1 1 b) is deducted, so that the larger surface of the pressure-sensitive adhesive layer 13 is available for the flying role change.
• the Kaschiermassest shapes (17) are offset from the edges towards the center of the Splicebandes (18, 19).
• the front offset in the application direction is necessary in order to separate the gluing time of the new web from the time beginning of the splitting process of the first laminating mass strip.
• the amount of offset depends on the application speed and the materials to be spliced. For use at high speeds (up to 1800 m / min), the offset is preferably 1 mm to 3 mm, preferably 2 mm.
• an offset of for example up to 15mm can be chosen.
• the rear offset (19) should always be chosen as small as possible, since the rear KaschiermassestMake also serves to ensure a secure and backlash-free bonding of Splicebandes with the uppermost layer of the wound bale.
• the strip should not protrude below the supports 14, 15, so that the offset 19 may result from the coating and laminating accuracy of the production lines.
• a splicing tape can be provided which, despite a non-full-surface gap system in the form of at least two laminating mass strips, has a higher splitting power, e.g. by higher mass order of the laminating compound, so that higher splitting velocities are possible, because the higher-splitting system can withstand greater centrifugal forces and aerodynamic forces.
• the splicing tape used according to the invention has the advantage that it is width-independent, since the work required to split the splicing tape (splitting work) is defined by the width of the strips and not by the width of the splicing tape itself.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Adhesive Tapes (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Treatment Of Fiber Materials (AREA)
• Replacement Of Web Rolls (AREA)

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• 2009
  • 2009-12-08 DE DE102009047680A patent/DE102009047680A1/de not_active Withdrawn
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• 2010
  • 2010-11-24 BR BR112012013657A patent/BR112012013657A2/pt not_active Application Discontinuation
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  • 2010-11-24 JP JP2012542442A patent/JP2013512832A/ja active Pending
  • 2010-11-24 ES ES10784767.5T patent/ES2649391T3/es active Active
  • 2010-11-24 WO PCT/EP2010/068103 patent/WO2011069824A1/de active Application Filing
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• 2015
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