JP2007269370A - Separable lid material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid material which is supplied to a filling sealer in a rolled state and whose outside sheet is easily separable from a separation start point. <P>SOLUTION: The lid material 10 having the back face sealed on the flange 21 of a container body 20, and comprises an outside sheet 12 and an inside sheet 13 mutually separable, roughly in the same shapes as the flange and having the outside peripheral edge provided with a pull tab 11. A plurality of half cut lines a are formed in parallel from one side to the other neighboring side at the base of the pull tab going through the inside sheet from a sealant layer 131. The outside sheet comprises at least a barrier base material layer 121, a printing base material layer 122 and a separation layer 123 laminated in this order. The inside sheet has at least the sealant layer 131 on the innermost layer. A stretched film or aluminum foil is provided as an intermediate layer 132 toward the outside sheet of the sealant layer of the inside sheet. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a detachable lid, and in particular, seals a container once, separates an outer sheet having a barrier property at the time of use, and leaves an inner sheet including a sealant layer on the container side. In such a separable lid material, it is related to the provision of a peeling start function when supplied to the filling and sealing machine in a roll state.

  Conventionally, in non-food fields, deodorizers, fragrances, dehumidifiers, etc., and in the food field, instant noodle containers are peeled off and removed from the outer sheet containing the barrier substrate and printing substrate layer, and fused to the container. A separable lid is used to leave the finished inner sheet.

  In the former, the contents are stored in a plastic molded container with a flange, and the opening is covered with a breathable lid such as a heat-sealable non-woven fabric or a perforated film to form a breathable lid of an active ingredient. The technique of covering with an outer lid is taken. In the case of this lid material, since the outer lid and the inner lid are already separated, it is not necessary to provide a peeling trigger.

  In the latter, after laminating the outer sheet and the inner sheet, a half cut having a shape along the outer periphery of the seal is applied to the plurality of hot water cutting holes and the pull tab base so as to penetrate only the inner sheet. With this lid material, it is necessary that the half-cut line that triggers peeling is close to the outer periphery of the container seal. However, since these lid materials are sealed to the container with one surface removed, the container / half-cut position shift in the sealing process No peeling failure due to.

  As a technique for integrating the outer lid and the inner lid in order to avoid inconvenience at the time of filling in the former, there is a technique described in JP-A-2003-237811. In this technology, in the laminated structure of outer sheet / separation layer / inner sheet, the content solvent scattering amount is reduced in the sealant layer remaining as a permeable membrane in the container after the barrier layer is peeled off by performing a half cut process that penetrates the sealant layer. It is possible to provide a hole to be adjusted. Here, a half-cut line is provided on the pull tab base as in the case of the latter hot water lid member so that the air-permeable layer and the separation layer can be separated.

  However, the print pattern / half-cut pitch misalignment and the print pattern / container position misalignment in the case of half-cut processing and sealing are not specified, but the half-cut line provided at the base of the pull tab is sealed. The half-cut line does not function as a peeling start line when it goes outside from the outer periphery, and the half-cut line also re-bonds when it enters the seal area, and again no longer functions as a peeling start line. Problem occurs.

  The present invention has been made in view of the above-described problems related to a separable lid member, and can be supplied to a filling and sealing machine in a roll state, and can be easily separated from the separation start point by enabling separation of the outer sheet. An object is to provide a lid.

  The invention according to claim 1 of the present invention is a lid member whose back surface is easily sealed to the flange portion of the main body, and is substantially the same shape as the flange portion, and has a pull tab on the outer peripheral edge, and can be separated from each other. A plurality of half-cut lines are formed in parallel at a depth penetrating the inner sheet from the sealant layer from one side toward the other side adjacent to the base of the pull tab. It is the separable lid material characterized by these.

  Thus, according to the first aspect of the present invention, a plurality of half-cut lines are formed in parallel at a depth penetrating the inner sheet from the sealant layer from one side toward the other side adjacent to the base of the pull tab. Since it is formed, when covering and heat-sealing the lid material on the container body, the lid material can be peeled from the container body without any trouble even if a slight positional shift occurs.

  The invention according to claim 2 is the invention according to claim 1, wherein the outer sheet has a configuration in which at least a barrier substrate layer, a printing substrate layer, and a separation layer are sequentially laminated. The separable lid member according to claim 1, wherein the lid member has a sealant layer as an inner layer.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, a stretched plastic film or an aluminum foil is provided as an intermediate layer near the outer sheet of the sealant layer of the inner sheet. It is a separable lid.

  As described above, according to the invention described in claim 3, since the stretched plastic film or the aluminum foil is provided as the intermediate layer near the outer sheet of the sealant layer of the inner sheet, the half-cut line is completely re-fused by the heat of sealing. Thus, the half-cut line can function as a peeling trigger line.

  According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the region where the half-cut line is formed is a region outside the inner periphery of the seal. It is a lid.

  Thus, according to the invention of claim 4, since the region where the half-cut line is formed is a region outside the inner periphery of the seal, it avoids the complete re-fusion of the half-cut line due to the seal heat, The half-cut line can function as a peeling trigger.

  Further, the invention of claim 5 is the invention according to claim 1, 2, 3 or 4, wherein the inner sheet and the outer sheet forming the lid member are supplied in a continuous roll shape, and the printed pattern applied to the outer sheet It is a separable lid member characterized in that it is processed by tracking the pitch.

  Thus, according to the fifth aspect of the invention, the inner sheet and the outer sheet forming the lid material are supplied in a continuous roll shape, and are processed by tracking the pitch of the printed pattern applied to the outer sheet. It is possible to improve production efficiency and reduce costs in each process.

  According to a sixth aspect of the invention, in the first, second, third, fourth, or fifth aspect of the invention, the inner sheet has a plurality of inflow / scattering amount adjustment holes surrounded by an inner periphery of a seal to the container. It is a separable lid member characterized in that it is perforated in the region.

  Thus, according to the sixth aspect of the invention, the inner sheet is provided with a plurality of inflow / scattering amount adjustment holes in a region surrounded by the inner periphery of the seal to the container. The separable lid material of the invention is a lid material with an inflow / scattering amount adjustment function.

  As described above, in the separable lid material of the present invention, by providing a plurality of half-cut lines at narrow intervals at the peeling start location, the printed pattern / half-cut pitch shift at the time of half-cut processing, or at the time of container sealing Even if the printed pattern / container position shift occurs, the frequency can be increased so that the outer periphery of the seal portion is in contact with one of the half-cut lines, and the tolerance of alignment in the container sealing process can be widened.

  Further, in the separable lid material of the present invention, it is essential that the seal part and the half-cut line are in contact with each other when sealing to the container, but relatively heat resistance such as stretched polyethylene terephthalate film or aluminum foil is good. By inserting the base material layer into the inner sheet, it is possible to avoid complete re-fusion of the half-cut line due to the sealing heat, and the half-cut line can function as a peeling trigger line. Further, by inserting a stretched film or aluminum foil into the inner sheet, it is possible to improve the deformation of the inner sheet when the outer sheet is peeled off.

  Through the above-mentioned ideas, it is possible to supply the raw material in a roll state, perform half-cut processing by tracking the pitch of the printed pattern, and seal processing to the container, improving the production efficiency in each process and reducing the cost. It is possible to take down.

The present invention will be described in detail below based on one embodiment.
The separable lid material (10) of the present invention is a lid material (10) whose back surface is easily sealed to the flange portion of the main body, as shown in FIGS. It is a lid having the same shape and having a pull tab (11) on the outer peripheral edge and comprising an outer sheet (12) and an inner sheet (13) that are separable from each other.

  And the half cut line (a) at the base (14) of the pull tab is equidistant in parallel with a depth of penetrating the inner sheet from the sealant layer toward the other side adjacent to one side. It is a separable lid member characterized by being formed by.

The outer sheet (12) has a configuration in which at least a barrier substrate layer (121), a printing substrate layer (122), and a separation layer (123) are sequentially laminated.
The inner sheet (13) has a structure having a sealant layer (131) in at least the innermost layer.

  A stretched plastic film or aluminum foil may be provided as an intermediate layer (132) near the outer sheet of the sealant layer (131) of the inner sheet (13). By providing the intermediate layer (132), it is possible to avoid complete re-fusion of the half-cut line due to the heat of sealing, and the half-cut line can function as a peeling trigger line.

  In addition, the half-cut lines (a, a, a,...) Formed on the inner sheet (13) are outside the seal inner periphery (heat seal region (H)) when the lid material is heat sealed to the container body. It is necessary to be formed in the region. Half cut lines (a, a, a, ...) are provided in the area outside the inner circumference of the seal, thereby avoiding complete re-fusion of the half cut lines due to the heat of sealing when the lid is heat sealed to the container body. In addition, the half-cut line can function as a peeling trigger line.

  Further, the inner sheet and the outer sheet forming the cover material are supplied to the filling and sealing machine in a continuous roll shape, and the sealing of the container body is performed by tracking the pitch of the printed pattern printed on the outer sheet.

  Further, a plurality of inflow / scattering amount adjustment holes (133, 133, 133,...) Are formed in a region surrounded by the inner sheet (13) sealed inside the container. This inflow / scattering amount adjustment hole is used to determine the volatilization / scattering amount of medicinal and aroma components from deodorants, fragrances, hygroscopic agents, insect repellents, etc. contained in the container, or the outside air is the contents in the container. This is for adjusting the amount of inflow flowing into the object.

  Since the separable lid material of the present invention has such a configuration, the separable lid material is placed on, for example, an opening of a plastic molding container with a flange, and heat sealing is performed between the lid material and the flange of the molding container. When the container is sealed and then opened, when the pull tab is lifted, the half-cut line (a) triggers the peeling, and the outer sheet and the inner sheet of the lid are separated, and the inner sheet is attached to the container body. Only the outer sheet can be separated and peeled from the container body (see FIG. 5).

  Hereinafter, the present invention will be described in detail by way of specific examples.

  [Outside of container] Polyethylene tereflate film (12 μm) / ink layer / nylon film (15 μm) / easy peel sealant polypropylene resin-based multilayer easy peel sealant film (30 μm) / polyethylene (15 μm) / intermediate layer (133) A composite film having a layer structure of stretched polyethylene terephthalate film (12 μm) / polypropylene (30 μm) [inner side of the container] was produced. In this composite film, the polyethylene terephthalate film (12 μm) to the easy peel sealant (30 μm) corresponds to the outer sheet (12), and the polyethylene (15 μm) to polypropylene (30 μm) corresponds to the inner sheet (13).

  The pitch of the printed pattern provided on the outer sheet was tracked in the composite film, and a plurality of half-cut lines (a) having a depth through which the inner sheet penetrated were provided as shown in FIG.

  A polypropylene surface of this processed raw roll is used as an adhesive surface, and the printed pattern pitch is also tracked, and a 180 ° C. × 0.2 MPa × 1 sec. X Heat-sealed under twice conditions, trimmed as shown in Fig. 8, and a polypropylene molded container of Example 1 was produced in which a separable lid was heat-sealed to the flange portion.

  In the composite film of Example 1, the same composite film as in Example 1 was prepared except that the stretched polyethylene terephthalate film (12 μm) of the intermediate layer was replaced with a stretched polypropylene film (20 μm). In the same manner as in Example 1, the polypropylene surface of this processed raw roll was used as the adhesive surface, and the printed picture pitch was also tracked, and a separately prepared polypropylene resin molded container with a flange was prepared. 180 ° C. × 0.2 MPa × 1 sec. X Heat-sealed under twice conditions, trimmed as shown in Fig. 8, and a polypropylene molded container of Example 2 was produced in which a separable lid was heat-sealed to the flange portion.

  In the composite film of Example 1, a composite film having a layer structure in which no intermediate layer is provided, that is, [the outside of the container] a polypropylene resin system that is a polyethylene terephthalate film (12 μm) / ink layer / nylon film (15 μm) / easy peel sealant A composite film having a layer structure of multilayer easy peel sealant film (30 μm) / polyethylene (15 μm) / polypropylene (30 μm) [inside the container] was prepared.

Thereafter, a half-cut line is provided in the same manner as in Example 1 and punching is performed. Similarly to Example 1, the polypropylene surface of this processed raw fabric roll is used as an adhesive surface, and the printed pattern pitch is also tracked separately. A 180 ° C. × 0.2 MPa × 1 sec. X Heat-sealed under two conditions, trimmed as shown in Fig. 8, and a polypropylene molded container of Example 3 was produced as a comparative example in which a separable lid was heat-sealed to the flange portion.

  Using the same composite film as in Example 1, the pitch of the printed pattern provided on the outer sheet is tracked, and one half-cut line (a) having a depth through which the inner sheet penetrates is provided as shown in FIG. did.

  Using the polypropylene surface of this processed raw roll as the adhesive surface, the printed pattern pitch was also tracked, and the flanged polypropylene resin molded container prepared separately in the same manner as in Example 1 was subjected to 180 ° C. × 0.2 MPa. X 1 sec. X Heat-sealed under twice conditions, trimmed as shown in Fig. 8, and a polypropylene molded container of Example 4 serving as a comparative example in which a separable lid was heat-sealed to the flange portion was produced.

  With respect to the polypropylene molded containers of Examples 1 to 4 thus produced, 1000 pieces of seals and surplus trimmings were continuously produced, the pull tabs of each lid member were lifted upward, and the outer sheet had an appropriate peel strength Samples that could be peeled off and remained the inner sheet fused to the polypropylene molded container were regarded as normal (O), and the number of samples showing an appropriate peeled state was measured. The results are shown in Table 1.

It is a fragmentary sectional explanatory view showing one example of the state where the separable lid material of the present invention was placed in the plastic molding container, and was heat-sealed. FIG. 2 is an explanatory plan view showing the state of FIG. 1 viewed from above. It is sectional explanatory drawing which shows one Example of the separable lid | cover material of this invention. It is sectional explanatory drawing which shows another Example of the separable lid | cover material of this invention. It is explanatory drawing which shows the state which has peeled the separable lid | cover material of this invention from the plastic molding container. It is partial explanatory drawing which shows the state which mounted the separable cover material of this invention in the opening part of the plastic container, and was heat-sealed from the top. It is another partial explanatory drawing which shows the state which mounted the separable cover material of this invention in the opening part of the plastic container, and was heat-sealed from the top. It is explanatory drawing which shows the state which mounted the separable lid | cover material of this invention in the opening part of the plastic container, and was heat-sealed from the top.

Explanation of symbols

10 ... Separable lid 11 ... Pull tab 12 ... Outer sheet 121 ... Barrier base layer 122 ... Print base layer 123 ... Separation layer 13 ... Inner sheet 131 ... Sealant layer 132 Intermediate Layer 133 ··················································································································

Claims (6)

It is a lid material whose back surface is sealed to the flange part of the container body, has a pull tab on the outer peripheral edge substantially in the same shape as the flange part, and is composed of an outer sheet and an inner sheet that can be separated from each other,
Separable, characterized in that a plurality of half-cut lines are formed in parallel at a depth penetrating the inner sheet from the sealant layer from one side toward the other side adjacent to the base of the pull tab. Lid material. The outer sheet has a configuration in which at least a barrier substrate layer, a printing substrate layer, and a separation layer are sequentially laminated,
The separable lid member according to claim 1, wherein the inner sheet has a sealant layer as an innermost layer.   The separable lid member according to claim 1 or 2, wherein a stretched film or an aluminum foil is provided as an intermediate layer near the outer sheet of the sealant layer of the inner sheet.   The separable lid member according to claim 1, 2 or 3, wherein the region where the half-cut line is formed is a region outside the inner periphery of the seal.   The inner sheet and the outer sheet forming the lid material are supplied in a continuous roll shape, and are processed by tracking the pitch of a printed pattern applied to the outer sheet. Or the separable lid | cover material of 4.   A plurality of inflow / scattering amount adjustment holes are formed in the inner sheet in a region surrounded by an inner periphery of a seal to the container. Or the separable lid | cover material of 5.

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