AN ADHESIVE CLOSURE TAPE STRIP SYSTEM. PRESSURE SENSITIVE, PA DISPOSABLE CLOTH Description of the Invention The present invention relates to an adhesive closure structure composed of a fastening tape strip and a release tape strip for use in a disposable diaper ( disposable) or an item for adult incontinence. Most disposable or disposable diapers use pressure sensitive adhesive tape strips.The adhesive on the free end, or outer end of the fastener tape strip, requires protection from contamination before use. Originally, it was provided with a release liner, however, prior release liners were considered inconvenient for many reasons, including inconvenience, difficulty in use, and inadvertently swallowing the baby. Disposable disposable release liner In response to these problems numerous patent applications relating to various means of elimination or modification of the release liner have been filed, some of which are discussed in the US Patent. Mo, 4,168,196, U.S. Patent No. 4,168,196 refers to REF: 24692 re to a method to remove the disposable release liner while minimizing the amount of substrate film used to form the strip of diaper fastener tape. A single substrate film is coated in part with adhesive and release material, respectively, on opposite faces and ends of the substrate film. There are two adhesive regions on different faces, and opposite ends, of the substrate with two release-coated regions provided in the form of the two adhesive regions so that the substrate can be wound as a tape with the two adhesive regions in contact with the two release coatings. The fastening tape strip is adhered to the nonwoven top sheet of the napkin with a adhesive-adhesive region. The second adhesive region at the end and opposite sides of the fastening cinch strip is attached to the backsheet of the diaper by the wearer. This system, although relatively simple to use by the diaper manufacturer, is very difficult to manufacture, requiring a complicated coating of the area of two different release coatings and two adhesive cores - very close on both sides of a single one. Substance support A more delicate proposal was the use of a separate fastening tape strip and a separate strip of release tape or release liner where the release tape strip or release liner is permanently secured to the Damage, to the -touch strap, or both. For example, US Pat. No. 3,955, 576 proposes to join a strip > of fastening tape to a strip of release tape, strip of release tape that is also permanently attached to the diaper upper sheet. The permanent bond between the fastener tape strip and the release tape strip is created by superimposing and folding the tapes to form a region of adhesive to adhesive contact between the two strips. US Pat. No. 4,237,890 discloses a release liner which is permanently bonded on one side to a central section or zone of a fastener tape strip. An end section of the fastener tape strip is releasably attached to the release liner and the opposite end section of the fastener strip is attached to the back sheet of the diaper. The two joined strips would apparently be seen as a folded prelaced structure. Another bent prelaminate structure is discussed in US Patent No. 4,726,971, wherein a strip of release tape is secured to a fastener tape strip by means of a unifying band.
In addition »the fastening tape strip and the tape-release strip are firmly attached to faces or diaper diamonds. The fastening end section of the fastener tape strip is releasably secured to the release surface of the release tape strip. The end of the fastener tape strip permanently adhered to the diaper is provided with a more aggressive adhesive layer. US Pat. Nos. 4,060,085 and 4,029,098 disclose a release liner which is secured in adhesive form to a central portion of the fastener tape strip in an end section with the majority of the thermally sealed release liner being a the face of the inner lower sheet which is adhesively secured to a central portion of the fastener tape strip in an end section with the largest part of the release liner being thermally sealed to the inner top sheet side of the diaper. These constructions are much more difficult to imoperate for a diaper manufacturer and the thermal sealing of the diaper release vestment can effectively destroy the release characteristics of the release surface. The present invention relates to providing a tir? of adhesive tape and a laminated piece of strip - of adhesive release sensitive to pressure, of low eos to be simple to apply and use by the manufacturer of diapers and simple to manufacture forming a system of tape strip closure of High performance diaper, low cost. According to the present invention, a disposable garment, e.g. A diaper or an article for the incontinence of the adult is provided with a pressure-sensitive adhesive closure tape strip system comprising a laminated piece of closure strip, a portion of fastener tape and a portion of release strip and an articulated belt, "The portion of attachment band strip has a first side with an adhesive layer and a second face opposite without an adhesive layer, The release strip portion has a first face with an Release strip and a second face without release layer The release strip and the strip of fastening tape are rolled and rolled into a roll of closure sheet and subsequently unrolled and cut into laminated pieces of closure strip for application to a disposable garment The first side of the fastening tape strip and the first side of the release strip are laminated in a superimposed configuration in such a way that at least the adhesive tape The strip of fastening tape strip is covered by the release layer of the release strip, allowing the release. First face of fastener tape portion is removed from the first release strip portion face, The release strip portion is permanently adhered to the disposable garment by the second face of the release strip, the The fastening tape strip portion is removably attached to the first face of the release strip portion and permanently attached to the disposable garment with the attached tape. The first face of the jointed tape is attached at one end to the second face of the pull portion of the fastening tape. The second end of the articulated tape is attached to an outer face of the garment - unclutter. The release strip portion is attached to an interior face of the disposable garment by means of an adhesive layer on the second face of the release strip portion. When the laminated closure piece is formed, with the two strips flat and in the same plane, the first two faces of the strip are in face-to-face relationship and substantially completely overlapped. The two strips can be removed from each other in such a way that there is no adhesive contact between the adhesive tape of the fastening strip and a non-releasing coated surface of the first and second faces of the release portion of the strip. . If the laminated piece of closure has to be cut directly into laminated pieces of closure strip - and applied by a manufacturer of disposable gloves as a tape, the second face of the release strip is re-coated with a pressure-sensitive adhesive and the face of the fastener tape strip is coated-preferably with a release coating such that a laminated piece of tape The closure can be rolled into a roll, unrolled, then cut into laminated pieces of closure tape strip and applied to the dissalable piece as a laminated piece of adhesive strip of adhesive closure close to the nression. Alternatively, the manufacturer of disposable garments can adhesively coat the second release strip face of the laminated closure part after a laminated non-tape laminated piece is unwound and before applying the laminated strip laminate. closure on the disposable garment. The articulated belt can also be supplied as a roll of pressure-sensitive adhesive tape or formed of a film which is coated in adhesive form before being cut into strips. When used as a diaper tape strip closure system, the second face of the laminated film release portion of the closure strip is adhered to an upper sheet of diaper (the inner layer permeable to the liquid). ) in a first diaper border region. The adhesive layer of the fastener tape strip portion is releasably secured to a release surface on the first face of the release strip portion such that the fastener tape strip portion can be removed. to the portion of the release strip and subsequently adhered to the back sheet of the diaper in a second diagonal border region to form the diaper closure. The hinged strap secures the portion of the strip of fastening tape to the back sheet of the diaper in the first edge region of the diaper, Fig. 1 is a side sectional view of a diaper system. strip of closing tape of the technique ante- -. on a side edge of the diaper. FIG. 2 is a side sectional view of a first form of embodiment of the closure strip strip system of the invention on a side edge of the panel, FIG. 3 is a side sectional view of a first section of FIG. ^ embodiment of the closure strip strip system of the invention as would be used. Fig. 4 is a perspective view of the closure strip strip system of the invention in a diaper, Fig. 5 is a schematic view of a method of manufacturing a laminate closure piece used in the strip system. of closure tape of the invention. Fig. 6 is a schematic view of a second method of manufacturing a laminated closure piece used in the closure strip strip system of the invention with a side view of a laminated piece of closure strip of a second form of realization The pressure-sensitive adhesive closure tape strip system of the present invention will generally be described with reference to disposable diapers and adult incontinence articles, however, the closure tape strip system of the invention would be applicable to Other disposable items, for example, a hospital gown, a disposable cap or in 'vases, such as for an individual sanitary napkin wrap. Fig. 1 shows a conventional method of attaching a strip of fastening tape 1 to an outer-edge region 3 of the diaper. The outer edge region 3 would comprise a woven or laminated piece or a film and / or a piece, non-woven. The fastening tape strip 1 would comprise a backing 5 with a release surface and an adhesive layer 6 sensitive to pressure. One end of the fastening tape strip 1 would be attached in a "removable" manner to a strip of release tape 2 and a second opposite end of the fastening tape strip 1-is attached to the outer edge region 3 of the diaper , The two strips of tape 2 and 1 are applied from rolls of tapes separated, The problems of this construction include cost and performance. The adhesive tube 6 has to be designed to securely and permanently join the edge region 3 at the second end while releasably attaching to a front portion of the diaper-at the first end of a diaper. 1-adhesive strip of pressure-sensitive adhesive tape. These inherently inconsistent objects can cause problems are the adhesive bonding objects at one or both ends of the fastener tape 1, The fabrication may also be difficult due to the adhesive exposed on the fastener tape strip during the fabrication and the need T to accurately bend the fastening tape strip, at the junction between the first and second ends, on the adhesive coated face. Fig. 2 reveals a first embodiment of the. present invention wherein the closure strip strip system comprises a portion of release strip 2, a portion of fastener strip 41, and an articulated syntax 16, The closure syntax strip system is attached in a form permanent to a bor region of 3 of the diaper 10 comprising a top sheet layer permeable to liquid 12 and a backsheet layer i-permeable to liquid 11, of which two layers, or only one of these two layers, comprises the edge region 3 of the diaper 10. This outer edge region 3 is where the closure syntax strip system is attached, the two strip portions (41 and 21 are laminated together such that an adhesive layer in the The fastening tape strip portion 41 is releasably adhered to a release layer 9 in the release strip portion 2. The release strip 2 portion comprises a substrate 7 provided with its release 9 in a first sara are a segu The product is permanently bonded to the outer edge region 3, preferably - it is a pressure-sensitive adhesive web 8. The substrate 7 may be any conventional film, such as a single or multi-shell ply of a polymer or thermoplastic polymers. , such as polyolefins. In addition, a non-woven or woven substrate can be extrusion coated or laminated to additional layers, papers, skins or the like to form the substrate 7, The release surface 9 should typically be a release coating, which could be any type of convensional use, such as a release liner on a release tape or diaper release liner. The pressure sensitive adhesive layer 8, if used, is formulated with an adhesive that can permanently bond the release strip portion 2 to the outer edge region 3 and could be conventionally a sticky resin. adhesive type synthetic rubber. A preferred adhesive would yield the development in U.S. Patent No. 5,342,685 (Gobran), which discloses an adhesive that dyes 100 parts of an elastomeric phase having 78-98 parts of an AB-type block sopolymer diblock elastomer predominantly of polystyrene , or derivative of polystyrene, blocks A, and politl, 3-buta-diene blocks A, and poly-l, 3-butadiene B blocks. The remaining portion of the elastomeric phase produces multiblock type AB block polymers of three or more blocks , preferably a triblock copolymer ABA block b being a poly-l, 3-butadiene. The elastomeric phase is made sticky with a mixture of a solid resin that gives tackiness and an oil or liquid element that provides for lower temperatures, at least partially compatible are the R blocks B, to provide an adhesive having a transfer temperature of Intermediate glass block sompues ** to (CMTg). less than -10 ° C, other pressure-sensitive adhesives made of synthetic rubber made of natural rubber or natural rubber can be used provided that the release at 135 ß (tested as described in US Patent No, 5,342,685) to the upper sheet of the diaper, e.g. a nonwoven is at least 100 g / 25.4 mm, preferably at least 150 g / 25.4 mm. The fastening tape strip portion 41 is similarly composed of a substrate 44 which can be any suitable substrate, such as the dessritos for the substrate of the release strip portion 7, used conventionally as a syntax backing. The fastener tape strip adhesive layer 46 can be any conventional pressure sensitive adhesive used for a strip of diaper fastener tape that can be re-positioned. In a preferred embodiment, a less aggressive adhesive is used such as the adhesive of the grip tape 46. The adhesive of the grip tape is preferably a sticky elastomeric adhesive with the elastomer preferably being a polyisopolymer. block type AB terl block that has blocks A and bloaues B, such somo sopolí eros of block ABA and sopolímeros de -bloque AB. Block A is a monoalkenylarene, primarily polystyrene prinside, having a molecular weight between 4,000 and 50,000, preferably between 7,000 and 30,000. The stencil of block A is from about 10 to 50 percent, more preferably between 10 and 30 percent, - -Other suitable A blocks can be formed from alphamethylstyrene, t-butylstyrene and other ring alkylated styrenes as well as mixtures thereof. B is an elastomeric dyed body, such as isoprene or -butadiene or hydrogenated versions thereof, having an average cell weight of from about 5,000 to about. 500,000, preferably from approx. 50,000 to 200,000, -But preferably the type AB block polymers will comprise most of the elastomer of the adhesive, other sonorous diene turners can be used to a lesser extent, such as natural rubber »butadiene, isoprene or butadiene-styrene rubber; butadiene-naphonitrile; butyl rubber or block sopolymers of these diene elastomers. The block sopolimer is used in a sanity that ranges from approx. 30 to 95 per cent by weight, preferably 35 to 60 per cent by weight of the adhesive composition. The sticky resin tackifier generally comprises a mixture of a solid tackifying resin and a liquid tackifying resin, a solid tackifying resin, a tackifying liquid, or a mixture of a solid tackifying resin. and a liquid nlastifisador and / or a resignation of liquid tackiness. The tackifying resins can be selenized between the group of resins, at least partially, the B blocks of the elastomer materials. The adhesive is made sticky-preferably with a tackifying resin with a liquid nitride or a liquid resin. The adhesive can be applied by any conventional method including hot-cast coating, gravure coating, co-extrusion, solvent coating and the like. The fastening tape strip adhesive can generally have a CMTg of from 230 to 265 Kelvin. The polymer content is generally higher for lower and lower CMTg adhesive formulations for higher CMTg formulations. The CMTg can be salculated using the Fox Esuasion by measuring the Tg of the intermediate block of the elastomeric block copolymer and the Tg of the tackifying resin and liquid plasticizer. The actual brightness is measured using a differential scanning rimeter such as a DSC-7, manufactured by Perkint.lmer, less aggressive adhesives are useful by suing the fastening syntax strip portion 41 is directly adhered to. to a thin film, or the like, back layer to form the adhesive closure. This thin film, by e,, is generally a polyethylene polymer, cooler or mixed film, Optionally, a region 11 of pressure sensitive adhesive 13 can be provided at the outer end of the strip portion. of fastening tape 41 to provide a non-adhesive portion 13 for a user to grasp when removing the strip strip portion 41 from the release strip portion 2 of the rear sheet 11. Preferably, The attachment is provided with a release liner, which allows the fastening tape strip, or a laminating piece of fastening tape, including the fastening tape and a release strip provided with a cover layer. pressure-sensitive adhesive, e ^ or ^ e in a roll of syllable lant. A native saw blade is formed from the release strip and the strip of sin. ta of sujesión without healthy adhesive. in the release strip and preferably without release channel in the super fisie 5 of the fastening syntax strip. In this form of realization, the sawing laminate is cut into laminated faces of a closing tiaa and aided to a region of the outer edge 3 are a flooring adhesive or the like. In any case, the closing strip laminate -or the strip laminate (closing ink of the two strips (1 and 2) is attached to one side of the outer edge region 3 are a healthy adhesive 8 or some other middle of - unassisted union.
The holding strip portion 41 is attached to a second shoulder of the outer edge region 3 with a pressure-sensitive adhesive seam 16, the articulated belt 16 may be provided with a pressure-sensitive adhesive. more aggressive pressure, such as can be used for the pressure-sensitive sap 8, others-suitable adhesives are those such as were described for the adhesive layer 6 with a higher level of polymer (eg 50 to 95 per cent and / or are a CMTg of from 250 to 270 el elvin, the back 18 of the artisulated article 16 can be any suitable substrate, such as those used - for the backing of the fastening tape strip 44, Preferably, the back 18 of The artisulated tape is a thin, strong film such as an orbital film such as biaxially oriented polypropylene with a thickness ranging from 10 to 80 microns.The backing of the suture strip is preferably a whiter film. The film laminate of a non-oriented thermoplastic polymer, such as is disclosed in US Pat. No. 4,769,283 CSipi-nen et al.), Artisulated synth backing may be stiffer than the backing of the tape strip. of clamping already guß does not extend beyond the outer trellum 3 without being attached to the portion of the fastening strip t Therefore it is less likely that the backrest of the articulated tape with respect to the back of the porsión of subtraction syntax strip, put in -sontasto diresto are the user or carrier and sausa irritation, The artisulated syntax preferably has a number of 15 to 90 per cent of the feel of the strip tape strip orsion are at least 1.0 sm attached to the second layer of the outer edge region and which is preferably said sheet back sheet, FIG. 4 is an illustration of the diaper saw syllate strip system of the invention as it would appear when s and used in a diaper 10, the diaper 10 is of a convensional design is the strip strip portion of its portion 1 that is shown removably attached to a front region 14 and permanently attached to ears or. edge ruffles 3 in the diaper 10, the front region 14 may be provided with a reinforcement film, or the like, to increase the strength in this area, if required, as is known in the art, Fig. 5 illustrates schematically a method of manufacturing a saw laminate 28 of a release strip 27 and a fastener strip 25 used • • in the fastener strip system of the invention. The backing 24 for the holding strip 25 is provided with an aliasing roll 32 which is unwound on a cooling tong roll 31. The pressure sensitive adhesive is provided with an extruder or other medium of suitable feed 33 in the pinch roll or in the refrigerant roll 31 forming the layer 26 of adhesive 26 senslhle to the pressure The strip of the fastening tape 25 formed is laminated then a release strip 27 provided with a back roll 20 The release liner 21 that can be pre-re-coated is a release liner 29 or re-surfaced with a suitable release material in line to form the liner strip 27, the release-coated face 29 of the backing of the strip of release 21 is laminated to the pressure-sensitive adhesive layer 26 in the fastening strip 24 backing, The saw laminate t * 28 can then be collected in the form of a roll 35, a ca dhesiva could also be resurfaced in a release strip backing 21 and a beaded layer resurfaced in backing 24 to form a saw strip laminate that could also be collected in a roll as a syllable laminate, or used Directly on a diaper line is a laminate of sawing tape and cut into a laminate strip of blank, a roll of the sawing laminate 35 would be unraveled, then sorted in laminate strip and covered are adhesive (either before or after sorting the laminate into laminates of lanyard otherwise attached to a diaper in the diaper line. Alternative method of forming a saw laminate can be -surfaced in lamination strip laminates, as shown in FIG. 2, In this embodiment, the backing 21 of the release strip is supplied with a roll of Supplied 20 and coated with a release material 36, Subsequently, the release strip 27 is re-coated is a pressure-sensitive adhesive is a back-up 33 on the previously applied release material 36, forming a sensitive adhesive saoa 26 pressure The liberation material 36 forms the liration coating 29, having had sufficient time to suction, which avoids the mixing of the release coating and the pressure sensitive adhesive. The back 24 of the fastening tape strip, of the supply roll 32 is then laminated on the adhesive layer 26 and the closure laminate collected as a roll 35, When the closure laminate 28 is unwound and cut into laminates. With the closure strip and the fastening tape strip portion being subsequently removed from the release strip, the adhesive 26 will remain attached to the backing 24 of the fastener tape strip releasing the release strip backing 21. In Fig. 7 the release strip backrest 57 is shown as having a structured surface. The adhesive, suando, is applied to the backing 57 in a liquid or fluid form in the method of FIG. 6, it will adapt to this superposed surface forming an adhesive saucer 56 structured as a mirror image. The method of Fig. 5 could also be used to form an adhesive surface structured by the flu} or cold of the adhesive while it is in the roll 35, or preferably by passing the closure laminate 58 through a suitable pinch roller under pressure, and optionally salting, while the adhesive is still a fluid bed, Generally, the floor height The average basis of estrustura is from 15 to 500 misrons, preferably 25 to 250 misrons. In FIG. 7, the adhesive structure of the adhesive layer 56 of the fastening tape strip can be made rigid due to the exact adaptation of the adhesive web -56 are the contours in the release strip backing 57, while Saw laminate is in the form of a roll and while the laminated saw is in the diaper is a strip. As such, the fastening tape strip adhesive 56 can maintain the fidelity of its structure by pulling a portion of the fastener tape strip away from a release strip portion and placed on the diaper. The advantages of a structural adhesive in the insertion of the adhesive strip of insulation include the control of the adhesive properties such as stickiness, the level of release noise and the adaptation of the adhesive / substrate surface. These bonded adhesives are particularly useful for providing syntax strips are low levels of stripping noise when removed from a substrate, sorao is disclosed in the application PCT No, 94/10837 CBoyer and sol,), The provision of an adhesive Using a stripped release strip in a sonoresional saw system, as shown in Fig. 1, has to be performed using a pressure clamp roller in the diaper line. This is a less effec- tive method since the adhesive generally does not have enough time to adapt to the release rate of the release syntax strip. The form of embodiment of the Flg, 6 is generally preferred for releasing the shell on a sanding strip adhesive strip. It is noted that they are relasion to this date, the best method known by the applicant to implement said invention, 'is the one that is clear from the description of the invensifln, having dessrito the invention somo antesede, is claimed as property contained in the following:
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