MXPA97003073A - Dependable seal controlled with individual characteristics - Google Patents

Abstract

A closure for a resealable plastic package with a removable seal that can not be closed again and reveals poor handling, which gives an obvious indication that it was broken when the package was first opened, and that it could not reseal after opening for the first time. The closure has a first network, to which is attached a first polymeric resin material, and a second network facing the first, and to which a second polymeric resin material is attached. The first polymeric resin material has a high affinity with a second polymeric resin material. One of the first and second polymer resin materials has a low cohesive strength, so that it will break instead of stretching under tension. Removable seal sealing rods join the first and second networks together, joining the polymer resin materials first and second one to the other. When the peelable seal is first opened, a portion of one of the first and second polymeric resin materials with low cohesive strength remains bonded to the other of the first and second polymeric resin materials, and is separated from the remainder. The separation causes a discoloration in the adhesive, giving a visual indication that the peelable seal broke. The invention also includes a method for making the seal removable that can not be resealed and reveals poor handling.

Description

DEPENDABLE SEAL CONTROLLED WITH INDICATOR CHARACTERISTIC Background of the Invention i. Field of the Invention The present invention relates, in general, to the packaging technique, and, more particularly, relates to a continuous plastic closure that can be closed, of a type that is used to close the entrance of a bag or package. , and that includes a detachable seal that reveals attempts to open it, and that can not be closed again, with a feature that gives a clear integration of the integrity of the removable seal. 2. Description of the Prior Art In the use of plastic bags and packages, particularly for food, it is important that the bag be hermetically sealed until the buyer acquires the bag and its contents, takes them home, and opens the bag or package for the first time. It is then commercially attractive and useful for the consumer, that the bag or package can be closed again, so that its contents can be protected. The flexible plastic closures proved to be excellent for reclosable bags, because they can be manufactured with high-speed equipment, and are reliable for repeated use. A typical closure is one that has a notch on one side of the bag's entrance and a rib on the other side, and this rib can be intertwined with the notch, when the sides of the bag's entrance press against each other . Alternatively, a member having a plurality of ribs may be on one side of the entrance of the bag, while a member with a plurality of channels may be on the other side, where the ribs are closed with the channels, when the sides from the entrance of the bag they press each other. In this case, there may be no difference in appearance between the two members, since the ribs may simply be the intervals between the channels in a strip that can be closed with another in the same class. In general, and in a few words, some form of male / female interaction is used to join the two sides of the entrance of the bag together. The so-called members or stripes, in some way join the material, of which the bags themselves are made. Generally, pull flanges extend over the rib and notch strips, and these pull flanges can be pulled and separated to gain access to the interior of the bag. Although the flexible closures of this variety are very popular, they do not always prevent the inadvertent or unwanted opening of a bag or package inside the store, and several additions have been made to provide seals that reveal mismanagement, which could reveal that it was opened. before the purchase.

U.S. Patent No. 5,425,825 to Rasko and Share, which is commonly assigned with the present application, and which is incorporated herein by reference, shows and provides a solution to these problems of a detachable seal that can not be returned to. close, and that reveals mishandling, suitable for use with plastic closures that can be resealed in plastic bags and other packages to provide an airtight seal, until the removable seal is opened for the first time, and to provide a removable seal that can not be closed again, after the package is opened. Specifically, in the invention shown in U.S. Patent No. 5,425,825, reclosable plastic bags and packages are joined using two interlocked notch and rib members sealing the plastic bag or package, and the seal can be reopened. In the process by which the reclosable plastic bags are assembled, an area of fringe adjacent and parallel to one of the interlaced rib or notch members continuously receives a treatment, eg, a flame or corona discharge treatment. , to make an adhesive preferably adhere to the treated area. The adhesive, which is applied to the treated area to form the peelable seal, is retained in the treated area, rather than in the opposite interlaced rib or notch member that is untreated, when the peelable seal is broken for the first time. Thereafter, the peelable seal remains broken, since the adhesive has no affinity for the untreated plastic of the opposite rib member or groove once it is separated from them. U.S. Patent No. 5,435,864 to Machacek and Share, which is also commonly assigned with the present application, and which is also incorporated herein by reference, shows and provides an alternative solution to the same problems, where the adhesive is co-extruded in an area of adjacent strip and parallel to one of the two intertwined rib or notch members of the interlocking closure profile. In this instance, the coextrusion causes the adhesive to adhere preferably to the fringe area, where s did the corona discharge or flame treatment. The adhesive retained in that area when the removable seal is broken for the first time. As before, the peelable seal remains broken, after it is broken for the first time, since the adhesive has no affinity for the plastic, the rib member or opposite notch from which it separated. While the inventions shown in U.S. Patent Nos. 5,425,825 and 5,435,864 have met with considerable success, recently the need arose for a removable seal that can not be closed again, and reveals mismanagement, that could give a clear indication of the integrity of the package after visual inspection. In this regard, it was shown that it is difficult to determine, after a quick visual inspection, whether the detachable seal shown in the US Patents noted above are closed broken. The present invention, which can be seen as a refinement of what it shows in these United States Patents, provides this removable seal that can not be closed again and reveals mishandling, which provides a positive indication that it was broken when a package it broke for the first time, and it provides a detachable seal that can not be closed again after opening for the first time. SUMMARY OF THE INVENTION According to this, the present invention is a closure for a resealable plastic bag, wherein the closure also has a removable seal that can not be closed again, and reveals poor handling, which gives an obvious indication that it was broken when the package was first opened, and that it can not be closed again after it was opened for the first time. The present invention is also a method for forming the releasable seal that can not be closed again and that reveals poor handling. essentially, the invention can be practiced by joining a first polymeric resin material to a lattice net, and by joining a second polymeric resin material to the opposite lattice, where the first and second polymeric resin materials have a high affinity one for the other. By applying the sealing handles of the release seal and through the film from which the package is formed to the networks in the region of the first and second polymeric resin materials, the portions of the first and second polymer resin materials directly under the Sealing handles adhere to each other. When the package is subsequently opened, the polymeric resin materials have an essential affinity to remain sealed to one another, and will not detach from there, in the region directly affected by the sealing handles. One of the first and second polymeric resin materials, in addition to having a high affinity for the other polymeric resin material, has a low cohesive strength. As a consequence, a section of the polymeric resin material is separated from the remaining portions, either completely or partially. The separation of that polymeric resin material in this manner causes the polymeric resin material to discolor or clear, giving an obvious visual indication that the seal was broken. Preferably, the width of the first and second polymeric resin material in the networks is greater than that of the sealing handles of the peelable seal to provide discrepancies in the location and alignment thereof, which may exist in conventional sealing equipment.

The present invention has as advantages that it provides a visual indication of the place of the seal (when breaking it) for placement, quality control, inspection and evidence of bad handling. It also provides a removable seal that has an opening force consistently in the range of 2.0 to 2.5 pounds / inch. More generally, the closure of the present invention comprises a first flexible notch and rib interlacing member with a first network, and a second flexible interlacing notch and rib member as a second network. The flexible first and second rib and notch interlacing members intertwine with each other; in such condition, the first and second networks face each other. The first and second rib and notch interlacing and flexible members are extruded from a conventional polyethylene material, such as low density polyethylene (LDPE). A first polymeric resin material is bonded to the surface of the first network facing the second network by coating or application thereon of a surface modifying treatment. The surface of the second network facing the first network is provided with a second polymeric resin material, whereby the adhesive has a high affinity. The second polymeric resin material is bonded to the surface of the second network facing the first network by coextrusion, by coating or by application thereto after a surface modifying treatment. During the manufacture of the package, at least a portion of the first polymeric resin material is bonded to the second polymeric resin material by release seal seals. Some of the first and second polymer resin materials have a low cohesive strength. When the package is opened for the first time, the polymeric resin material having the low cohesive strength is broken and separated from the rest. This initiates an internal stress within the polymeric resin material, causing the discoloration that finally functions as an indication that the removable seal was broken. The method for forming the removable seal that can not be closed again and that reveals poor handling, comprises the steps of extruding a first flexible member and interlacing of rib and notch with a first network, and of joining a first polymeric material to the first network . The method also comprises the steps of extruding a second flexible member and notch and rib interlacing with a second network, and of joining a second polymeric resin material to the second network. Finally, the first polymeric resin material is bonded to the second polymeric resin material by stapling the first and second networks together with heated first and second removable seal bars. The present invention will now be described in more detail, with reference to the figures identified below. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional and schematic view of the top part of the reclosable plastic bag with the detachable seal of the prior art. Figure 2 is a view similar to that of Figure 1, but showing the result of breaking the detachable seal of the prior art. Figure 3 is a cross-sectional view taken through the extruded profile used to make closures having the peelable seals of the present invention. Figure 4 is a cross section taken through an extruded profile used to make closures having the alternative embodiment of the peelable seals of the present invention. Figure 5 shows a section of the short networks of the profile shown in Figure 3. Figure 6 shows the appearance of the profile shown in Figure 3, after joining the short networks with the long networks. Figure 7 is a schematic cross-sectional view of the top of a reclosable plastic bag, which has the detachable seal of the present invention. Figure 8 is a view similar to that of Figure 7, but showing the result of breaking a variant of the peelable seal of the present invention. Figure 9 is a view similar to that of Figure 8, but showing the result of breaking another variant of the peelable seal of the present invention. Figure 10 is a schematic cross-sectional view of the top portion of a reclosable plastic bag having an alternative embodiment of the release seal of the present invention. Figure 11 is a view similar to that of Figure 10, but showing the result of breaking the peelable seal illustrated herein. Figure 12 is a schematic cross-sectional view of the top portion of a reclosable plastic bag with another embodiment of the release seal of the present invention. Figure 13 is a view similar to that of Figure 12, but showing the result of breaking the detachable seal illustrated herein. Detailed Description of the Preferred Modes Returning now to the various figures, Figures 1 and 2 illustrate the operation of the peelable seal, which can not be closed again, and which reveals mishandling, done in accordance with the methods shown in the patents of the United States Nos. 5,425,825 and 5,435,864. Figure 1 is a schematic cross-sectional view of the top part of a resealable plastic bag 10 having the detachable seal of the prior art. The bag 10, which is shown in sealed condition, comprises a front sheet 12 and a back sheet 14, and where both can be extruded from thermoplastic resin material, such as polyethylene. In fact, the sheets 12 and 14 can be physically part of a single folded sheet in the lower part of the bag 10. A closure 16, formed perhaps by interlacing rib and notch members 18 or 20, pass over the upper part of the bag. the bag 10 and provide it with an opening that can be closed again. A notch and rib interlacing member 18 has a short net 22 that can be joined to the front sheet 12 by heat sealing during the manufacture of the bag 10. Generally, this fabrication is done on a vertical horizontal machine in the form-filling-and - lock (FFS), simultaneously with the packaging of a consumer food product inside the bag 10. Similarly, the other notch and rib interlacing member 20 has a long net 24, by means of which it is attached to the back sheet 14 by heat sealing during the manufacture of the bag 10. The relative lengths of the networks 22, 24, have no particular meaning other than that of allowing one to be distinguished from the other in the following discussion. A releasable seal adhesive 26 is applied to the short net 22 during the manufacture of the closure 16. The Pierce & Stevens E4009D, a polyethylene / ethylenvinyl acetate composition having a high cohesive strength, but a low adhesive strength to polyethylene, can be used as a removable seal adhesive 26. In general, a polymeric resin material with a high cohesive strength, but a low adhesive strength to polyethylene, can be used as a removable seal adhesive 26. As discussed in U.S. Patent Nos. 5,425,825 and 5,435,864, the surface of the short network 22 which is ultimately facing the long network 24 in a manufactured bag 10, can be given a surface modification treatment, such as flame treatment or corona discharge. The treatment causes the peelable seal adhesive 26 to adhere to it when the bag 10 is first opened. Subsequently, the adhesive 26 does not adhere to the long net 24. Alternatively, the adhesive 26 may also be co-extruded into the short network 22, a process that also causes it to preferably adhere to it. During the manufacture of the bag 10 in an FFS machine, the peel-off seal bars 28, which are heated bars momentarily pressed against, and through the top of the bag 10, seal the adhesive 26 to the long network 24, and forms a removable seal on it. Figure 2 shows the result of breaking the removable seal in the prior art bag 10 shown in Figure 1, by pulling the front sheet 12, separating it from the back sheet 14 in the upper part of the bag 10 over the close 16, as the arrows suggest. The adhesive 26 remains attached to the short network 22, and leaves no residue in the long network 24. As noted above, this invention succeeded in providing a releasable seal that can not be re-adhered after opening for the first time. In addition, as illustrated in Figure 2, the adhesive that provides the peelable seal resides entirely in the network to which it preferably adheres without passing over the opening of the bag. Nevertheless, it has often not been readily apparent, upon inspection, whether the seal was broken, since the prior art stamps shown in U.S. Patent Nos. 5,425,825 and 5,435,864 do not give an obvious indication of rupture. The need for this obvious visual implication is satisfied with the present invention. Figure 3 is a cross section taken through an extruded profile 30, of which the closures having the removable seals of the present invention are made. The profile 30 has two short nets 32 and two long nets 34, which together make up a wide portion of the center that is finally cut at a point indicated by the dotted line. The profile 30 is extruded from a synthetic polymer resin material, such as polyethylene, specifically low density polyethylene (LDPE). The adhesive 36 is arranged in the short network 32, either by co-extrusion with it, or by coating its surface which can follow a surface modifying treatment, such as the flame or by corona discharge, where the adhesive 36 has a low adhesive resistance to polyethylene. The rib and notch members 38 separate the short ribs 32 from the broad portion of the center that provides the long webs 34. In general, the adhesive 36 is a polymeric resin material comprising a polyethylene / ethylene vinyl acetate composition. The profile 30 differs from what is shown in U.S. Patent Nos. 5,425,825 and 5,435,864, including another polymeric resin material 40 in each of the long nets 34. The polymeric resin material 40 can be coextruded into the long nets 34, or can be applied to a surface of the networks 34 after the extrusion of the profile 30, and which can also be a polyethylene / ethylene-vinylacetate composition. The adhesive Pierce &; Stevens Proxmelt E4051D can be used as adhesive 36 to provide removable seals. In general, the adhesive used can have a low internal tensile strength and a low elongation under tensile forces; that is, when put under tension, it breaks instead of stretching. The E4051D has a low cohesive strength, but a high adhesive resistance to polyethylene. The polymeric resin material 40 may be of an ethylene vinyl acetate copolymer (EVA) material, such as Quantum VE 625,000, a 19% EVA copolymer, which is also a polyethylene / ethylene vinyl acetate composition. This material is very attractive to the hot-active adhesive 36, and has a high cohesive strength and high adhesive strength to polyethylene. Figure 4 is a cross section taken through an extruded profile 44, from which the seals having the peelable seals of the present invention can also be made. As before, the profile 44 has two short nets 46 and two long nets 48, which together make the wide center portion finally cut at the point indicated by the dotted line. The profile 44 is very similar to the profile 30, and is extruded from a synthetic polymer resin material, such as polyethylene, specifically low density polyethylene (LDPE). The adhesive 50 is arranged in the short nets 46, either by co-extrusion with it, or by coating its surface which can follow a surface modifying treatment, such as by flame or by corona discharge, where the adhesive 50 has a low adhesive resistance to polyethylene, in the form of a plurality of parallel beads or lines. The application of the adhesive 50 in the form of beads or lines allows it to separate from the short nets 46 without fracturing the fiber beads, when the peelable seal is broken, as will be described below. As before, the adhesive 50 is a polymeric resin material consisting of a polyethylene / ethylene vinyl acetate composition. The rib and notch members 52 separate the short nets 46 from the wide center portion provided by the long nets 48. As before, another polymeric resin material 54, also a polyethylene / ethylene vinyl acetate composition, is included in each of the long networks 48, either by coextrusion or by coating. The adhesive 50 and the polymeric resin material 54 may be of the respective materials described above, and which are useful for this purpose. Figure 5 shows the separation of the short nets 32 from the long nets 34 in profile 30. Two cutting blades 60 cut the profile 30 longitudinally through the rib and notch members 38. The profile 44 of Figure 4 is cut off similarly. Figure 6 shows the appearance of the profile 30 when the two short nets 32 are joined to the two long nets 34, then the separation is shown in Figure 5. The two short nets 32, produced from the profile 30 by cutting blades 60, they are bent or inverted, and joined with the long nets 34 by the rib and notch members 38. The adhesive 36, as a consequence of this inversion, is disposed on the faces of the short nets 32 that are facing the nets 34. Finally, the long nets 34 are separated from one another by cutting through the center. It should be particularly noted that the adhesive 36 is facing the polymeric resin material 40, after inversion. The profile 44 of Figure 4 is processed in a similar manner. Finally, the adhesive 50 is facing the polymeric resin material 54 when the short nets 46 are inverted and attached to the long nets 48 in a manner similar to that shown in Figure 6. In a subsequent operation of packaging machinery, The removable seal is formed by the application of heat and pressure with the removable seal seal bars placed in parallel to the seal removable seal area. Referring to Figure 7, a schematic cross-sectional view of the top part of the resealable plastic bag 70, a closure 72, made of the profile 30 shown in Figures 3, 5 and 6, has a short network 74 and a long network 76, which are attached to the front sheet 78 and the back sheet 80, respectively. The adhesive 82 in the short net 74 and the polymeric resin material 84 in the long net 76 are placed facing each other, and are joined together by the removable seal 86 sealing bars. The latter is not necessarily as wide as the adhesive 82 and the polymeric resin material 84. Figure 8 shows the result of breaking the peelable seal in the bag 70 by pulling the front sheet 78 away from the back sheet 80 in the upper part of the bag 70 over the close 72, as the arrows suggest. Most of the adhesive 82 remains attached to the short net 74, except where the peel-off seal bars 86 cause a portion 88 of the adhesive 82 to bond to a polymer resin material 84. To open the bag 70, it was necessary to break the adhesive 82, allowing the portion 88 to remain attached to the polymeric resin material 84. The act of breaking the adhesive 82 creates an internal stress, causing discoloration therein. This discoloration makes the characteristic of the peel seal bars 86 visible, and provides a clear visual indication that the peelable seal is broken. The peelable seal shown in Figure 8 can be described as a cohesive peelable seal, because the peelable adhesive breaks or cracks on itself, leaving a portion on both sides of the open structure peeled off. Another removable seal, known as a lamination removable seal, appears in Figure 9, which is formed where the adhesive 82 is completely delaminated from the short network 74 in the region where the removable seal sealant bars 86 attach it to the polymeric resin material. 86. Again, most of the adhesive 82 remains attached to the short network 74, except where a portion 90 is completely delaminated therefrom. To open the bag 70, it is again necessary to break the adhesive 82, allowing the portion 90 to remain attached to the polymeric resin material 84. As before, the act of breaking the adhesive 82 creates an internal stress therein, causing a discoloration, causing the characteristic of the removable seal 86 sealing bars is visible, and providing an obvious visual indication that the peelable seal broke. The temperature of the seal bars of the peelable seal 86 governs whether a cohesive or delaminating peelable seal is ultimately obtained. At low temperatures (180 ° C or less, and a dwell time of 1.4 seconds) of the peelable seal seal rods 86, a detachable delamination seal will be obtained. On the other hand, at temperatures above 180 ° C for a time remains 1.4 seconds, and the release adhesive will bond with the other side to which it was originally applied, and will result in a cohesive release seal. In any of the removable seal classes, whether cohesive or delaminating, the breaking of the adhesive 82 in Figures 8 and 9 may cause the occurrence of small fibers 92 or pieces of adhesive on the edges of the break. This can be minimized by applying the adhesive to the short nets in the form of a plurality of parallel beads or lines, as discussed above in relation to Figure 4. Figure 10 is a schematic cross-sectional view of the upper part of a plastic bag that it can be resealed 100 with a closure 102 made of a profile 44 which is shown in Figure 4. A short network 104 and a long network 106 are attached to a front sheet 108 and a back sheet 110, respectively. The adhesive 112, arranged as a plurality of beads or parallel lines on a short net 104, and a polymeric resin material 114 on a long net 106 is facing each other, and are joined together by peel-off seal rods 116. The result of breaking the peelable seal in the bag 100 by pulling the front sheet 108 away from the backsheet 110 at the top of the bag 100 over the closure 102, as suggested by the arrows, it appears in Figure 11. The adhesive 112 remains attached to the short net 104, except where the peel-off seal bars 116 caused a portion of the adhesive 112 to bond to the polymeric resin material 114. For opening the bag 100, these lines or beads of adhesive 112 directly activated by the peel-off seal bars 116 are separated from the short net 104, and remain attached to the polymeric resin material 114. The act of separation initiates an internal stress within the the beads that remain attached to the polymeric resin material 114, causing discoloration. This discoloration makes the characteristic of peelable seal seal bars 116 visible, and provides a positive indication that the peelable seal was broken. The application of the adhesive 112 in the short network 104 in the form of beads or lines, minimizes the occurrence of fibers 92 when the peelable seal is broken. Figure 12 is a schematic cross-sectional view of the upper part of a reclosable plastic bag 120 with a closure 122. A short net 124 and a long net 126 are joined to a front sheet 128 and a back sheet 130, respectively. The closure 122, the short net 124, the long net 126 and the front and rear sheets 128, 130 are, as before, polyethylene. The short net 124 is coated with an adhesive 132, such as the Pierce &; Stevens E4009D, which comprises a polyethylene / ethylene vinyl acetate composition with a high cohesive strength, and a low adhesive resistance to polyethylene. As in the case of U.S. Patent Nos. 5,425,825 and 5,435,864, the surface of the short network 124, which finally faces the long network 126 in a manufactured bag 120, can receive a surface modification treatment, so that this polymeric resin material can preferably adhere thereto. On the other hand, the long net 126, as provided with ribs of a different adhesive 134, such as Pierce & Stevens, comprises a polyethylene / ethylene vinyl acetate composition with low cohesive strength, but high adhesive strength to polyethylene. In addition, the adhesive 134 has a high affinity for the adhesive 132. In this regard, the Pierce & Stevens E4009D has a great affinity for the Pierce & Stevens E4051D. After the peel-off seal bars seal the top of the plastic bag 120, the adhesive 132 forms a peelable seal with a long net 126 in the spaces between the ribs of the adhesive 134. In addition, the adhesive 134 is attached to the adhesive. adhesive 132. The result of breaking the peelable seal in the bag 120 by pulling the front sheet 128 away from the back sheet 130 in the upper part of the bag 120 over the closure 122, as suggested by the arrows, appears in the Figure 13. Adhesive 132, which does not have strong adhesion to polyethylene, is shed from long net 126. Adhesive 134, with strong adhesion to polyethylene and strong adhesion to adhesive 132, but low cohesive strength, breaks , and part of it remains in the long net 126, while the rest remains embedded in the adhesive 132. The breaking of the ribs of the adhesive 134 initiate therein an internal effort that causes the discoloration, which makes it visible. e the characteristic of the removable seal sealing bars, and provides an obvious indication that the peelable seal broke. For those skilled in the art, modifications to the foregoing may be obvious, but they could not cause the modified invention to be beyond the scope of the appended claims.

Claims (28)

1. A method for forming a re-releasable seal that can be resealed and reveals mishandling for a resealable plastic package, comprising the steps of: extruding a first flexible rib and notch interlacing member with a first network; joining a material of polymeric resin material to the first network of the first flexible member and mixer and rib interlacing; extruding a second flexible member and notch and rib interlacing with a second network; joining a second polymeric resin material to the second network of the second flexible rib and notch interlacing member, wherein the second polymeric resin material has a high affinity for the first polymeric resin material; joining the first polymeric resin material with the second polymeric resin material by stapling the first network and the second network together with heated first and second heated seal seals.

2. A method as defined in claim 1, wherein the first polymeric resin material is a polyethylene / ethylene vinyl acetate composition with high cohesive strength, and poor adhesion to polyethylene.

3. A method as defined in claim 1, wherein the first polymeric resin material is a polyethylene / ethylene vinyl acetate composition with low cohesive strength, and strong adhesion to polyethylene.

4. A method as defined in the claim 2, wherein the second polymeric resin material is a polyethylene / ethylene vinyl acetate composition with low cohesive strength, and strong adhesion to polyethylene.

5. A method as defined in the claim 3, wherein the second polymeric resin material is a polyethylene / ethylene vinyl acetate composition with high cohesive strength, and strong adhesion to polyethylene.

A method as defined in claim 1, wherein the first polymeric resin material is bonded to the first network of the first flexible member and notch and rib interlacing when coextruded therewith.

A method as defined in claim 6, wherein the first polymeric resin material is extruded into the first network in the form of a plurility of parallel beads.

8. A method as defined in claim 6, wherein the first polymeric resin material is coextruded with the first network in the form of a layer.

9. A method as defined in claim 1, wherein the second polymeric resin material is joined to the second network of the second flexible member and interlacing of notches and ribs by coextruding therewith.

A method such as the deifinid in claim 9, wherein the second polymeric resin material is coextruded into the second network in the form of a plurality of parallel beads.

11. A method as defined in claim 9, wherein the second polymeric resin material is coextruded into a second network in the form of a layer.

12. A method as defined in the claim 1, wherein the first of the joining steps comprises: treating a surface of the first network of the first flexible member and interlacing of notches and ribs to increase its receptivity to the first polymeric resin material; and applying the first polymeric resin material to the treated surface of the first network.

A method as defined in claim 1, wherein the second of the joining steps comprises: treating a surface of the second network of the second flexible member and interlacing of notches and ribs to increase its receptivity to the second polymeric resin material; and applying the second polymeric resin material to the treated surface of the second network.

14. A method as defined in claim 1, wherein the first polymeric resin material is attached to the first network of the first flexible member and interlacing of notches and ribs by coating it thereon.

15. A method like the d €? Finido in the claim 14, wherein the first polymeric resin material is coated on the first network in the form of a plurality of parallel beads.

16. A method as defined in claim 14, wherein the first polymeric resin material is coated in the first network in the form of a layer.

17. A method as defined in claim 1, wherein the second polymeric resin material is bonded to the second network of the second flexible member and interlacing of ribs and notches when coated thereon.

18. A method as defined in claim 17, wherein the second polymeric resin material is coated in the second network in the form of a plurality of parallel beads.

19. A method as defined in the claim 17, wherein the second polymeric resin material is coated in the second network in the form of a layer.

20. A closure for a reclosable plastic package, wherein the closure has a removable seal that can not be reclosed and reveals mishandling, wherein the closure comprises: a first flexible member and notched interlacing; ribs with a first network; a second flexible member and interlacing of notches and ribs with a second network, wherein the first flexible member and interlacing of notches and ribs is interlocked with the second interlacing member of notches and ribs, and wherein the first network is facing the second net; a first polymeric resin material bonded to a surface of the first network that faces a second network; and a second polymeric resin material is attached to a surface of the second network that faces the first network, wherein the second polymeric resin material has a high affinity with the first polymeric resin material to which it is attached, where a portion of at least one of the first and second polymeric resin materials is separated from the remainder thereof when the closure is opened to visually indicate that the peelable seal was broken.

21. A closure as defined in the claim 20, wherein the first polymeric resin material is a polyethylene / ethylene vinyl acetate composition with high cohesive strength, and low adhesion to polyethylene.

22. A closure as defined in claim 20, wherein the first polymeric resin material is a polyethylene / ethylene vinyl composition with low cohesive strength, and strong adhesion to polyethylene.

23. A closure as defined in the claim 21, wherein the second polymeric resin material is a polyethylene / ethylene vinyl composition with low cohesive strength, and strong adhesion to polyethylene.

24. A closure as defined in the claim 22, wherein the second polymeric resin material is a polyethylene / ethylene vinyl composition with a high cohesive strength, and strong adhesion to polyethylene.

25. A closure as defined in claim 20, wherein the first polymeric resin material forms a layer on the first network.

26. A closure as defined in claim 20, wherein the first polymeric resin material forms a plurality of parallel beads on the first network.

27. A closure as defined in claim 20, wherein the second polymeric resin material forms a layer on the second network.

28. A closure as defined in the claim 20, wherein the second polymeric resin material forms a plurality of parallel beads in the second network.