MXPA97003185A - Closure tape closure system which will be subjected for a delg film article - Google Patents

Abstract

The present invention relates to a pressure sensitive adhesive closure system comprising at least two opposing closure surfaces and a pressure sensitive adhesive tape strip fastener releasably attached to a first face of a first surface of closing at a free first end of the strip strip fastener by means of a pressure sensitive adhesive layer on a first side of said strip strip fastener, a second opposite end of said strip strip fastener attached premanently to a first strip fastener face of a second opposing closure surface, characterized in that at least the first face of the first closure surface is printed with a low adhesion material based on aqueous solution or polar solvent, with 100 percent solids, curable, such so that the free end of the fastener tape strip can be releasably attached to the first fastening surface at least twice a an adhesion to 135§of at least approx. 70 grams / 25.4 mm in the same or in different places of the first closure surface provided with the material of low printed adhesion, said first closure surface comprising a thin thermoplastic or thermoplastic film laminated with a film thickness of less than approx. . 50 micron

Description

CLOSURE TAPE CLOSURE SYSTEM THAT CAN BE RETRACTED FOR A THIN FILM ARTICLE OFFCP.IPTION OF THE I ECTION The present invention relates to improved disposable articles such as diapers, incontinence products, disposable garments, feminine hygiene products, and the like, which have a strip tape system. pressure sensitive adhesive holder, which can be re-clamped. Disposable diapers or incontinence articles and other disposable garments that require resistance to liquid, are typically manufactured with a liquid-impermeable or ca. This impervious layer to the liquid is generally the most external layer in this disposable garment. To facilitate the use and the ability to conform to the disposable garment and minimize costs, the liquid impervious layer is typically an extremely thin nylon, or a laminate with a thin film layer, generally formed of a thermoplastic polymer such as a polyolefin similar to a polyethylene oxide, conolmer or mixture. This same thin polymer film is also generally used as the adhesion surface to which the pressure-sensitive adhesive strip adheres to effect the closure of the disposable waste or other garment. Typically one end of the pressure-sensitive adhesive fastening strip - REF: 24516 is permanently adhered to an edge region of the Orenda in the polymer film - with the second opposite end of the fastening tape - preferably designed to be joined in This way it is possible to remove an outer surface of the adjacent fabric-to an opposite edge of the garment. This second end, or free end, of the fastening strip will typically adhere to the thin thermoplastic film or film layer to form the jacket impervious to the liquid. A problem with the above system is that in order to provide a secure permanent joint at the first end of the fastening tape, the pressure-sensitive adhesive fastening tape is sufficiently aggressive as -for the second free end of the fastening strip Attachment is removed from the disposable garment will cause the thin polymer film or film film to break. Several solutions have been proposed in the art to treat this problem. For example, it has been proposed to increase the tensile strength of the backsheet of the diaper by increasing the thickness of the backsheet, using polymers having tensile strength to yrs, or some combination thereof; U.S. Patent No. 5,147,346 (co-extruded backsheet having a high modulus reinforcing layer), European patent No. 256 885 31 (proposes a backsheet diaper comprising a mixture of nolipropile resins and low density polyethylene that has a thickness from 1 to 1.5 mils, a range of thicknesses greater than that of typical commercial backsheets and a tensile strength of at least 550 g) , US Pat. No. 5,084,039 (proposes a mixture of polyethylene and a release-preventing material, such as an ethylene propylene copolymer) and US Pat. No. 4,880,422 (proposes a diaper backsheet formed from a mixture of - polypropylene and polyethylene to increase the adherence of the tape strip and increase the tensile strength). Although these stronger backsheets are less resistant to breakage, they are also - more rigid and less conformable and significantly - more expensive than a typical backsheet material of thin diaper. It has also been proposed to reduce the adhesion force of the fastening tape by using a less aggressive or less aggressive pressure-sensitive adhesive. Although this may decrease the occurrence of the breakage of the backsheet of the diaper, it also increases - significantly, the possibility that the strip of tape may become detached or fail during use. UsuallyIt has been found that it is difficult to absorb a pressure-sensitive adhesive with thin back sheets of disposable diapers to provide the desired levels of adhesion performance under a variety of conditions, the ability to re-fasten without friction and conformity and cost of the back sheet. As an alternative to reinforcement of the complete backsheet of the diaper there have been numerous proposals to reinforce only the portion of the backsheet-which is adhered to the strip of fastening tape. For example, U.S. Patent No. 3,867,940, (Mesek) proposes to reinforce the backsheet of the diaper with a thin lightweight cloth or film bonded to the inner or outer face of the back sheet of the diaper at the places in which it is placed. where the strip of fastening tape of the diaphragm is adhered. This reinforcement is to prevent the backsheet from being torn or distorted while the wheel is used or adjusted by the parents (eg, removing and adjusting the location of the strip of tape), A variation - of this is proposed by the Japanese Utility Model - "No, 74910 C1982), which proposes to use a small pressure-sensitive adhesive tape bonded only at the specific edge location of the diaper where it is most likely to be-the free end of the strip. The diaper fastening tape is removably attached. Wide areas of reinforcement ("as in Mesek) have been proposed, only in the place where the free end of the fastening tape strip is attached (as in the Japanese Utility No. 74910 mentioned above), for example, in U.S. Patent No. 4,643,730, which proposes a radiation curable coating on an inner face of the backsheet of the diaper, Similarly, the US Pat. No. 4,296,750 proposes to coat an inner surface of the back sheet of the diaper with a hot melt adhesive ("hot-melt") to provide a large area of reinforcement. U.S. Patent No. 4,210,144 also proposes to reinforce the inner face of the back sheet of the diaper with a coating, such as a hot melt adhesive. European Patent No. 80647 Bi proposes to stick a thin plastic material on an outer face of the backsheet of the diaper, which is also taught in the patent No. 2,1029,689 B which proposes to glue one or more plastic bands on the sheet. external front portion of the diaper, the same preferably being embossed to control the level of adhesion by the strip of the diaper fastening tape? * Japanese Patent Kokai No, 64-77604 and the Mode and Utility No, Showa No., 64-3405 proposes to coat the outer surface of a back sheet of diaper with heat-curable silicone heat-releasable material and long-chain alkylating material, respectively, to allow the strips of the fastening tape of the diaper to adhere and rejoin. The invention relates to an improved system for releasably and repeatedly joining a conventional high adhesion diaper fastening tape to thin and similar films such as those used as backsheets of diapers. FIG. 1 is a perspective view of a conventional construction of a diaper using the low adhesion coating of the invention as it would look-being placed on a wearer. FIG. 2 is a perspective view of a conventional construction of a diaper using another embodiment of the invention. The low adhesion printed back sheet adhesive closure system will be described with respect to a conventional baby diaper, however, such a closure system could be used in other discarded applications using adhesive fastening strips, such as press fasteners. for incontinence in adults, discarded medical gowns, caps, packaging systems, feminine hygiene items, and the like. A conventional diaper construction is described in Fig. 1. The diaper 10 is provided with a thin sheet-back 2, external, impermeable to liquid and of an internal coating sheet 3 permeable to liquid. Between the backsheet 2 and the cover sheet i-terna 3 is an absorbent core (not shown). Adhesive fastening tape strips 4 are provided in two laterally opposite lateral edge regions 7 of the back sheet 2 at a first end of the diaper. In a second end of the diaper, a printed coating 11 of little adhesion is permanently attached to the outer face of the thin backsheet 2 of the diaper, giving a surface to which the free ends 12 of the diaper are folded over the backsheet 2. the fastening tape strips 4 can repeatedly adhere, remove and re-attach in the same place. The low adhesion coating is located adjacent to an edge region 7 of the second end of the diaper so that when the free end 12 of a fastening tape strip 4 adheres to the coating of low adhesion, two edge regions 7 in opposite ends of the diaper will overlap to effect diaper closure. When the free end 12 of a fastening tape strip 4 is attached to the low adhesion printed cover 11, a leg opening 5 is formed, which is typically provided with resilient means to form a sealing joint with the user's legs. . The diaper can also be elasticated around the waist portion to provide an additional sealing joint with the wearer by elasticized portions 6, Before use, the adhesive surface at the free end 12 of a strip of fastening tape adhesive 4 is protected from contamination by detachable coated paper or a removable coated tape, which can be provided adjacent to the corner of an edge region and the first end and on the inner cover sheet 3. The printed coating of low adherence 11 - may have the form of a single band, or region, or multiple bands, or regions (eg, one for each free end of the holding strip 12), The band is a stoppage area of the sheet back printed with the material of adherence. The band (s) 11 should (s) be positioned so that a free end of the fastener strip adhere to the strip when the diaper is placed on the wearer. A strip can be of any suitable size. A larger single strip 21 and a diaper 20 are shown in Fig. 2, Larger strips have larger areas for the user to place the free end of the fastening strip with less risk of adhesion to a portion of the backsheet without the coating -impressed with little adhesion or removable. The backsheet 2 is of a conventional design and will typically be a water-impermeable thermoplastic film such as a polyolefin film, such as a polyethylene polymer film or a ur-to-polyethylene blend or other polyolefin or thermoplastic polymer. tico, or a co-extruded film, as they are known in the -technique. The backsheet could also be in the form of a laminate of two or more films or a film and a nonwoven or woven material or the like. Generally, a subsequent film 2 is thin, eg. a film less than 50 microns thick, preferably less than 35 microns thick. The outer face of the backsheet 2 is treated to have a surface energy greater than about 33 dynes / cm, preferably greater than about 40 d / cm. This surface energy can be achieved by an appropriate selection of polymers, additives or the like for the material forming the outer surface of the backsheet or by post-weaving techniques such as corona treatment, flame treatment, primer substances. ("primers") chemicals, or similar. Corona treatment is preferred. The low adhesion printed coating is - usually a low adhesion material based on an aqueous or polar solvent that can be applied with conventional printing techniques such as printing - -offset, photogravure, flexography, rotary printing, im-pressing by ink jet or similar. Flexography and gravure are preferred. Other removable materables that can be printed such as 100 percent curable solid systems are also possible. The low adhesion-printed material is preferably applied as a continuous pattern. That is to say, a separate 100-percent area coated with the adhesive adhesion material) but intermittent or discontinuous printed patterns are also possible over the separate printed area. If desired, the backsheet film can be printed with an ink jet, prior to low-adhesion printing, with an aesthetic design or figure (s), in random or repeated patterns on all or a portion of the - back sheet. Ink printing can be with any conventional ink based on an aqueous or polar solvent, such as those disclosed in U.S. Patent Nos. 5,302,193, 5,310,887 and 5,296,275. The low adhesion material is either - that can be suitably printed from a polar or aqueous solvent such that the solvent will not distort or dissolve the thermoplastic backsheet. Materials of low adherence can be printed from solutions, dispersions, emulsions or suspensions. The pressure sensitive adhesive selected for the fastening tape strip will be properly one that provides a strip of tape that adheres to the sheet - It is more resistant than the printed material of low adhesion, generally providing an adhesion - at least 1.2 times higher than the backing sheet than the printed area with poor adhesion. The adhesion of the strip of tape to the printed area of low adhesion may be any functional level of adhesion for the particular end use contemplated. For diapers, the adhesion tape 135 * fastening tape strip (described below) is generally at least 70 grams / 25.4 mm. (inch) and is preferably at least 100 grams / 25.4 mm. The repeated application of the strip of fastening tape in the same place or different places in the printed areas of low adherence provides adhesion values 135 ° within 30 percent of the initial value of adhesion, preferably within 20 percent of the initial value of adhesion, at room temperature. The adhesives may be any conventional pressure sensitive adhesive composition, however, an adhesive based on rubber resin is preferred. The pressure-sensitive adhesive in the fastening strip is preferably a bonded elastomer in which the elastomer is a block copolymer type A-B, wherein the A blocks and the B blocks are configured in linear, radial or star configurations. Block A is a monoalkenyl arene, preferably polystyrene, having a molecular weight between 4000 and 50000, preferably between 7000 and 30,000. The content of block A is preferably about 10 to 50 percent, more preferably about 10 to 30 percent. . Other suitable A blocks can be formed from alpha-ethylstyrene, t-butyl styrene and other alkylated ring styrenes, as well as mixtures thereof. The B-block is an elastomer conjugated diene, having an average molecular weight from about 50000 to about 500000, preferably from about 50000 to about 200000. The elastomer preferably comprises about 10 to 90 percent by weight, more preferably 40 to 80 weight percent, of any block copolymer having B end blocks, such as AB diblock copolymers, or pure B elastomer; more preferred are block copolymers A-B having end blocks B. The bonding components of the elastomer-based adhesives generally comprise solid-tack resin and / or a liquid or plasticizer adhesive. Preferably, the bonding resin is selected from the group of at least partially compatible resins with the B-block diene portion of the elastomeric polymer or block copolymer. Although a relatively minor portion of the resin resin is generally not preferred, it may include resins compatible with block A, if present, generally called end block reinforcing resins. Generally, these endblock resins are formed from aromatic species, liquid adhesives or plasticizers suitable for use in the adhesive composition of the fastening tape strip include naphthenic oils, paraffinic oils, aromatic oils, mineral oils or esters of low molecular weight resins, polyterpenes and resins Co. The glue portion of the pressure sensitive adhesive generally comprises from 20 to 300 parts per 100 parts of the elastomeric phase. Preferably, this is predominantly solid glue, however, from 0 to 25 weight percent, preferably 0 to 10-weight percent to adhere to polyethylene surfaces, of the adhesive, may be liquid glue and / or plas-tifier. Other conventional pressure sensitive adhesives can be used on the fastening tape strip - to adhere to the back sheet printed with low adhesion, such as acrylate-based adhesives or adhesives - based on other diene or non-diene elastomers or natural rubber -? - ral. Adhesion 135 of partially secured release film coated. The test panels consisted of 2-inch x 5-inch (5.1 cm x 12.7 cm) clean steel panels, which had a 0.5-inch (1.9 cm) strip of double-coated adhesive tape attached throughout of each edge of 2 inches (5, lcm). A sheet of the printed release film was spread loosely on the test panel so that it was flat without wrinkling. The transverse direction of the detached, low adhesion film was parallel to the long dimension of the test panel. The film was deployed firmly on the double-coated adhesive and any excess film that extended beyond the edge of the test panel was cut out. The adhesive composition of the pressure-sensitive adhesive tape used for the test was 40 percent by weight of Kraton MR 1111 (a polystyrene-polyisoprene linear block copolymer obtained from -Shell Chemical Co. which is approximately 15% by weight. per cent of diblock and 85 percent triblock and a styrene content of approximately 21 percent), 47 percent by weight of * 7instack '"' Plus Solid Cß glue resin resin that can be obtained from Goodyear Che icaJ Co., 13 percent by weight of Shell lexM'R 371 (a naphthenic oil can be obtained from Shell Chemical Co.) vi percent by weight of Irsanox MR 1076. An antioxidant hindered phenol obtainable from Ciba-Geigy) The adhesive was hot-melt coated on a base of fused polypropylene matte / clear matte (polypropylene homopolymer resin used to melt the nickel was # 5A95, which can be obtained from Shell Chemical Co.). The adhesive coating thickness was 44 microns. Each band of test tape averages 1 inch x 2.5 inches (2.5 cm x 6.5 cm) with a paper guide that is 1 inch x 8 inches (2.5 cm 20.3 cm) adhered to the 0.25 inches late (0.6 cm) of the tape. This tape assembly was stretched with its long dimension non-parallel to the long dimension of the panel so that the tape was approximately equidistant from each end of the panel and centered between each side. No additional pressure was exerted when laying the tape. The tape was unfolded immediately with two passes of a 4.5-pound (2-kilogram) rubber band and then rehearsed. An Instron MR tensile tester was used for the sample adhesion test.

The samples were tested in a 135-degree barrel through the layer at a constant transverse speed of 12.5 inches (30.5 cm) per minute. All adhesion values are given in width (grams / 2, 54 cm). Example 1 and Co-operative Example 1 A coil of 1 mil polyethylene film backing sheet engraved, which was supplied with a "M" crown on one side (" MICROFLEX "that can be obtained from Clopay Corporation) was applied corona treatment on the side that had no corona treatment of the film to give a surface energy of approximately 38 dynes / c (0.0038 M / sm). These films have no corona treatment on both sides because doing so results in the blocking of the film making it impossible to unwind the film in the form of a coil. The film of Example 1 was then photographed in separate areas, as shown in Fig. 1, with an aqueous solution of 5 percent solids of - - - "HITAC MR" RA-11 (a polyethylene release material). -retained resin obtainable from Mayzo, Inc., - -Norcross, Georgia) and oven-dried at 120 ° F (4 ßC). The roller used to print the release material was the Model No. 140 (straight-line, high-performance flat diagonal line striped cell) that can be obtained from International Engraving Corporation, Cedar Grove, New Jersey, Line Speed It was 40 feet / min (12 meters / min). Ideally, only enough release material should be applied to give consistent release characteristics to the printed areas of the film. The weight of the coating of the release material can be controlled more precisely with more appropriately designed equipment and processes. For comparison (comparative example 1), the polyethylene backsheet, diaper film samples were printed with the release material as described above except that the film had no corona treatment on the untreated side. crown before printing the release material on that side of the film. Five individual test tapes were used to test 135 degree adhesion against a single sample of each of the printed release films prepared above in the printed release area prepared above in the printed release area. The results are given in Table I.

Table I Tape of Example 1 Comparative example test (adhesion 135 ß) (adhesion 135 °) 1 99 64 2 109 847 3 101 787 4 118 622 112 734 The data shows that the adhesion does not significantly increase the removal of multiple test tapes from a single location in a single Example 1 film. This suggests that there is little or no transience of the release material to the tape adhesive of the test. On the other hand, the film sample -from Comparative Example 1, to which the corona treatment was not applied- showed a significant increase in adhesion after detaching numerous test tapes and a severe stretching of the film was observed. movie. This suggests that the release material did not adhere adequately to the film of Comparative Example 1, which resulted in the transfer of the disposable material to the adhesive of the test tape. The adhesion to 135"was also measured for the detachment of a single test strip from the detachable printing area of a single sample of the films of the example and the comparative example, followed by four subsequent reapplications of the same test tape. On the same area of the two films where the test tapes had been applied initially, the results are given in Table II.

Tabía II Example 1 Example comparati- (adhesion 135 °) vo (adhesion 13 ~ 5ß) Release initial 99 66 la. reapplication 106 96 2a. reapplication 108 125 3a. reapplication 104 146 4a. reapplication 120 164 The data shows that there was no significant increase in the adhesion values (the increase was within the experimental variation) in the removable printed film of Example 1. This suggests that there was little or no transfer of the peel-off impression to the - - Adhesive of the test tape. A more significant increase (2.5 times the initial value of adhesion) was observed for the peelable printed film of example-comparative 1. This indicates that there was a greater transience of the peel-off impression to the adhesive of the test tape. The adhesion to 135 * of a single test tape of five separate samples from the films of the example and from the comparative example was also tested. The results are given in Table III, Ta "bl III Example sample 1 Comparative film example (adhesion 135 °) (adhesion 135 ') 1 90 56 2 82 23 3 83 14 4 90 9 5 80 8 The data shows little variation in adherence after a single test tape had been released. of five separate film samples from example 1.

This suggests that there is little or no transfer of the release material to the adhesive on the test tape. In contrast, the adhesion decreased markedly for the test tape of comparative example 1 that had not undergone corona treatment before printing the release material. Adhesion to the peel-off impression was also tested after aging two sets of four tape / film laminates of Example 1 for 4 hours and 24 hours, respectively, at 100 * F (38 # C). Thermal aging did not result in significant changes in adhesion. The test results are given in Table IV. Table IV Adhesion 135 ° Initial 68 4 hs, 38 »C 102 24 hs, 38 «C 98 EXAMPLE 2 A reel of disposable printed polyethylene backsheet film was prepared as described in Example 1 except that the release material used was an organopolysiloxane-polyo urea copolymer. The copolymer used comprised the condensation reaction of an organosiloxane diamine with a diisocyanate and a diamine chain diluent. The silicone diamine segment had a molecular weight of approximately 5,000 and was prepared as described in US Pat Nos. 5,214,119 and 5,290,615. The -silicone diamine was then reacted with "JEFFAMINE MR" DU-700 (which can be obtained from Texaco Co.). 1,3-diami-nopentane and isophorone diisocyanate to provide a non-liming with about 20 weight percent silicone, 25 weight percent segment "JEFFAMINE MR" and 55 weight percent hard segment. The organopolysiloxane-polyourea was printed from an isopro-panol solution with 5 percent solids and oven-dried at -140 ° F (60 ° C). The speed of the line was 70 feet / minutes (21 meters / minute). Five individual test tapes were used to test for adhesion at 135 degrees against a single sample of the removable film as described in Example 1. The results are given in Table V.

Table V Test tape Example 2 (Desnrendi 135 °) 1 - . 1 - 89 2 90 3 92 4 94 96 The data shows that the adhesion does not increase significantly after detaching numerous test tapes from the same place in a single film sample. Adhesion at 135 degrees was also measured to remove a single test strip from the printed area - detachable from a single sample of the peelable printed film, followed by four subsequent reapplications of the test tape on the same area of the film. where the tape had initially been applied. The results are given in Table Vi.

Table VI Example 2 From: sprendible 135 °) Desprendim. initial 85 Ira. reapplication 70 2nd, reapplication 74 3rd reapplication 81 4th reaplisation 71 The data shows a small variation in adhesion after reapplying the test tape several times over the same area of the film of example 2, where the tape has been applied initially. The 135 ° adhesion was also measured to remove a single test tape from five stop samples of the release film printed from Example 2. The results are given in Table VII.

Table VII Sample of sample Example 2 (From; sprendim. 135 °) 1 78 2 79 3 75 4 76 79 The data shows little variation in adhesion after the single test tape had been detached from a number of the samples of the film of example 2. The adhesion was also tested after aging two sets of four tape / film laminates. of Example 2, 4 hours and 24 hours, respectively, at -100βF (38 C). The thermal aging did not result in significant changes in the adhesion. The test results are given in Table VIII.

Table VIII Desorendim .. 135 ° Initial 78 4 hours 100 ° F 69 24 hours 100ßF 87 Example 3-6 A reel of unprinted polyethylene-non-woven film was prepared in a manner similar to that described for Example 1 except that instead of applying corona treatment to the side of the untreated film with corona treatment, that side The film was coated with a primer solution and then with peel-off printing. The primer solutions used are indicated in Table IV. The primers were coated by etching from 5 percent by weight solutions using a Model No. 200 roller (pyrrhoid for flexographic printing) that can be obtained - of the International Engravins Corporation, Cedar Grove, New Jersey. The film coated with primer was then baked in the oven at 49 * C. The speed of the line was (12 m / minute). The film coated with primer was then etched by etching with an aqueous solution with 2 - percent solids of the "HITACMR" release material.

RA-11 and was baked in the oven at 120 ° F (49 ° C). The speed of the line was 40 feet / minute (12 / min). The roller used to print the release material was the same Model No. 200 roller that was used to coat the primer solution. Another reel of disposable printed polyethylene diaper sheet was prepared as described above except that instead of coating the non-corona treated side of the film with a primer solution, the side of the film did not The crown treatment was subjected to treatment - by flame. A ribbon burner at 4300 BTU / hr / inch was used. with a natural gas / pre-mixed air ratio (the ratio between air and natural gas was 10.3: 1), the distance between the tape burner and the film was 7 mm and the film was 7 mm and the film It was treated against a cooled clamp roller. The line speed was 150 meters / minute. This resulted in an energy level of the film of more than 52 dynes / cm. The adhesion to 135ß was measured to remove a single test strip from a single sample of the detached printed film, followed by four subsequent reapplications - from one of the test tapes over the same area of the film where that tape had been. applied initially. The results are given in Table IX, Table IX Film Example 3 Example 4 Example 5 Example 6 Imprint, Imorim, -, Imprim ,, Treatment to CP-347W CP-349W CP-310 by flame Initial detachment "" 236 254 172 252 lra.reapli cation ~ "¿: -jt 270 185 253 2nd step 301 300 208 257 3rd Reaccession 304 286 225 286 4th phase? 340 336 214 289 1 CP-347, CP-349 and CP310W can be obtained from Eastman Chemical Co., Kingsport, TN. They are dispersions that promote adhesion, which are oil-in-water emulsions based on Eastman CP0. The data shows a small increase in adhesion after re-applying the same tape in the same place on the same printed film sample detachable several times. The films stretched very slightly when they were removed and then recovered.

Example 7 and Comparative Example 2 A film reel of removable oleoethylene diaper backsheet film was prepared in a similar manner to that described in Example 1 plus - except that the film was printed with the ink based model. nolar solvent after corona treatment and before printing the release material. The ink printing model used was an area of 2 oulg. x 9 in. (5 cm x 20 cm) of teddy bears. This area printed with an ink model was similar in size to a typical front reinforcement band found in disposable diapers as shown in Fig. 1. Five models were printed spaced from each other through the coil which measured approx. 64 inches (1.63 meters) wide. The film printed with the model - »which was then printed with a removable material in and around the area printed with the model and dried in the oven. The release material used was a 5-percent by weight solution of "HITAC M" p "" RA-11 which was printed - using a 180-line laser-engraved ceramic flexographic printing roller (randomly engraved 45 degrees) which it had a volume of 3.51 trillion microns - 2 cubic / cm (which can be obtained from Stork Cellra ic), - The speed of the line was 183 m / min. of the five printed models and removable printed areas in the coil and were tested with adhesion resistance at 135 degrees.The adhesion at 135 degrees was measured by detaching a single test tape from each of the cyclic film samples, followed by four Subsequent reapplications of one of the test tapes over the same area - of each film sample where that tape was initially applied - the release data at 135"are summarized in Table X below. Table X Samples of 1 2 3 4 5 movies Despr, Despr. Desor. Despr. Despr 135 ° 135 ° 135ß 135"135 ° Initial detachment 71 95 75 99 78 Go to. reapplication 69 107 75 110 75 2a. reapplication 85 112 78 100 87 3a, reapplication 82 98 87 99 80 4th reapplication 81 107 81 114 85 The data shows a slight increase in adhesion after re-taping the same tape to the same place in the same film sample. There was no transfer of the ink and / or the release material to the adhesive and the backsheet of the diaper was not torn or torn when the tapes were peeled off. For comparison (comparative example 2), a film was also prepared that had not been subjected to corona treatment before printing the model and subsequent printing of the release material. This movie was tested as described above. The data is summarized in Table XI, Table XI 1st 2nd. 3rd 4th 5th. model model model model model Desprendim. initial 171 200 203 229 204 Ira.replica 205 241 239 249 252 2nd application 241 289 246 285 278 3rd application 297 293 283 310 337 4th reapplication 297 335 304 330 - - These data show a more significant increase in adhesion after reapplication of the adhesive tape T several times in the same place in the release films printed in Comparative Example 2. In all the T cases there was transfer of the ink to the adhesive tape which is not convenient. The films stretched - very little to be detached and then recovered. All the films of the example were formed in coils after printing with a model of the removable material of ooca adhesion. These film reels could easily be unrolled without being blocked despite the fact that more than 75 percent of the surface of the printed film for all the films was not printed with the low adhesion material. Generally at least 10 percent of the printed side of the film had removable printing. At lower levels than this film a block could occur. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, the contents of the following are claimed as co or property:

Claims (4)

= SIS I N D I C C I O E S

1. - A pressure-sensitive adhesive closure system comprising at least two opposite cylindrical surfaces and a pressure-sensitive adhesive tape strip fastener removably attached to a first face of a first closure surface in a first free end of the strip strip fastener by means of a pressure sensitive adhesive layer on a first face of said strip strip fastener, a second opposite end of said strip strip fastener permanently attached to the strip strip fastener; a first face of a second opposing closure surface, characterized in that at least the first face of the first closure surface is printed with a low adhesion material based on aqueous solution or in polar solvent, with 100 percent solids. lids, curable, in such a way that the free end of the fastener tape can be detachably attached to the first fastening surface at least twice at a level of adhesion. 35 ° of at least approx. 70 grams / 25.4 mm in the same or in different places of the first closure surface provided with the material of low printed adhesion, said first closure surface comprising a thermoplastic film or laminate of thin thermoplastic film with a film thickness of less than approx. 50 microns.

2. The pressure sensitive adhesive closure system according to claim 1, characterized in that the first closing surface is a film of polyolefin or thermoplastic polyolefin blend or co-extruded film, 3.- The adhesive closure system pressure sensitive according to claim 2, characterized in that the first sealing surface is a polyethylene polyethylene film or a film, the co-extruded one. 4, - The pressure-sensitive adhesive closure system according to claim 1, characterized in that the first face of the first closing surface before the application of the low adhesion printed material has a surface ener- gy of more than Approximately 33 dynes / cm and the low adhesion material covers at least 10 percent of the printed face of the first closure. 5. The pressure-sensitive adhesive closure system according to claim 1, characterized in that the first The face of the first sealing surface before the application of the material of small printed size has a surface ener- sity of more than approx. 40 dynes / cm. 6, - The pressure-sensitive adhesive closure system according to claim 1, characterized in that the low-adhesion printed material is a continuous printed pattern, 7, - The pressure-sensitive adhesive closure system in accordance with the claim 6, characterized in that the first face of the first closing surface is subjected to corona treatment, 8. The pressure-sensitive adhesive closure system according to claim 1, characterized in that the low-adhesion printed material is in the shape of one or more bands located in portions of the first face of the first closure surface where the free end of the fastener tape strip can be adhered by a user, 9.- The pressure sensitive adhesive closure system of according to claim 3, characterized in that the first closing surface film has a thickness of less than approx. 35 microns, 10. The pressure-sensitive adhesive closure system according to claim 3, characterized in that the first and second closure surfaces comprise the same film that forms a liquid impermeable layer in a disposable garment, 11, - The pressure-sensitive adhesive closure system according to claim 10, characterized in that the disposable garment comprises a diaper, and the fastener tape strip is permanently attached to said second fastening surface by means of said fastener. -pressure-sensitive layer in a place of said second -surface closure with material of low adhesion not -impressed, 12, - The pressure-sensitive adhesive closure system according to claim 1, characterized in that the pressure-sensitive adhesive comprises a sticky AB-type block copolymer elastomer wherein the block A comprises a monoalkenylarene and the B block is an elastomer conjugated diene, 13, - The pressure sensitive adhesive closure system according to claim 12, characterized in that the low adhesion material comprises a polyurethane release material. 14. The pressure sensitive adhesive closure system according to claim 12, characterized in that the low adhesion material comprises an organopolysiloxane-polyurea release material. 15, - A thermoplastic film coil does not block, the film having two faces that have a surface energy of more than approx. 33 dynes / cm 2, one side printed with a low adhesion material based on an aqueous solution or polar solvent, with 100 percent solids, curable, on 10 to 75 percent of the film's surface, being the Thickness of the film is about 50 microns, characterized in that the film can be unrolled without blocking. 16. The non-blooming thermoplastic film coil according to claim 15, characterized in that the film is a thermoplastic polyolefin film or polyolefin blend or co-extruded film. 17. The non-blooming thermoplastic film coil according to claim 16, characterized in that the polyolefin film is a polyethylene film or a polyethylene mixture or co-extruded film. 18, - The non-blocking thermoplastic film coil according to claim 15, characterized in that the face of the film printed with material of low adherence, has a surface energy of more than approx. 40 dynes / cm. 19.- The non-T-blocking thermoplastic film coil according to claim 15, curled character because the low adhesion printed material is a continuous printed pattern. 20, - The thermoplastic film coil does not -r >; blocking agent according to claim 18, characterized in that the first face of the film was subjected to corona treatment, 21 - The non-blocking thermoplastic film coil according to claim 18, characterized in that both sides of the film were subjected a-r corona treatment, 22, - The non-blocking thermoplastic film coil according to claim 15, characterized. It gives because the material of little printed adhesion is in the form of one or more bands. 2

3. The non-blocking thermoplastic film coil according to claim 15, characterized in that the film has a thickness of less than approx. 35 microns.