JP2013141999A - Partially openable lid member and packaging body for storing powder and granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partially openable lid member configured to be cut out along a half-cut provided on a surface of a lid, which has a half-cut shape such that the lid member can be easily cut in opening without roughing a sectional surface, and a trouble due to breakage of the lid material is never caused.SOLUTION: The partially opening lid member includes a composite sheet and a surface sheet, and is thermally fused and sealed to an opening outer edge of a container body. The composite sheet and the surface sheet are partitioned by an easy-to-peel area and the other adhesive area, and mutually laminated and bonded. The composite sheet in the easy-to-peel area includes an adhesive area corresponding to the shape of a discharge port, a discharge port forming half-cut, and a peeling starting half-cut. The surface sheet includes a cutting portion by a non-linear half-cut in a boundary area between the easy-to-peel area and the adhesive area.

Description

  TECHNICAL FIELD The present invention relates to a lid for a container that seals an article, and by opening a part of the lid at the time of opening use, the lid is sealed by storing granular or powdered contents and powder particles using the lid The present invention relates to a body storage package. In particular, the present invention relates to a package that contains and encloses powder particles such as a powder bath.

Since the powder bath is easily deteriorated by moisture absorption, it is marketed in a sealed state inside a container having low moisture permeability.
Patent Documents 1 and 2 are technical documents relating to a package containing a powder bath agent. In the package described in these documents, the cylindrical body side wall and the bottom wall of the container constitute a container body, and the opening is covered. It is sealed with a seal.
The cylindrical side wall is made of laminated material of paper and polyethylene terephthalate film (PET film), and the bottom wall is laminated with paper and PET film as the central layer and heat sealable resin on both sides It is made of a material, and a bottom wall is bonded to the inside of the cylindrical side wall to seal the bottom.
The lid seal is made of polyethylene terephthalate film (PET film). The lid seal made of PET film is sealed by heat-sealing the periphery of the opening of the cylindrical side wall, and an overcap is placed on the lid seal. ing.

  FIG. 4 is a perspective view of the package containing a bath agent. FIG. 5 is a perspective view with the overcap removed.

  As can be seen from these drawings, the package is composed of a container and an overcap (2), and the container has a container body (1) composed of a cylindrical side wall and a bottom wall (not shown). The opening is sealed with a lid seal (3).

The lid seal (3) is heat-sealed at the periphery of the opening of the container body (1) and includes a pull tab (3a) protruding outward from the periphery of the opening.
A cut line (3b) is provided starting from the pull tab (3a).

  When opening the package, first remove the overcap (2), then pull it from the pull tab (3a) with your fingers to cut the lid seal (3) along the tear line (3b). Open.

However, depending on the method of cutting the lid seal (3) by pulling it from the pull tab (3a), the cutting direction cannot be controlled with high accuracy, and therefore the size of the opening changes every time it is opened. There was a problem that.
And when the opening is small, it was difficult to take out the bathing agent which is the contents.

  In addition, an easy peeling layer must be provided partially at the peeling interface, and the complexity of the printing process and the positional accuracy between the post-processing and the peeling part greatly affect the product quality.

From the above circumstances, it is possible to eliminate the need for extremely high positional accuracy, and the lid material and the container body can be completely welded and sealed, the opening as intended can be created, and can be opened easily. There has been a demand for a lid and a package for storing powder fluid using the same.

Moreover, in the conventional lid | cover material, the boundary line which peels and removes the surface sheet of an easily peelable area at the time of opening of a discharge port was provided as a linear perforation or a linear half cut (patent document 2) )Met.
That is, in the former method of providing a linear perforation that penetrates the surface sheet, the resistance was somewhat high because the half-cuts that were intermittently inserted were broken, and the generation of paper dust was inevitable. .
In the latter method in which a linear half cut that penetrates the surface sheet is provided as a boundary line, there is a possibility that the lid material is folded along the straight line on the manufacturing and filling line, causing a problem.

In view of the above, a lid material that is cut along the surface of the lid after half-cutting, is easy to cut at the time of opening, the cross-section is not rough, and the lid material is bent at the time of filling (especially when sealing to a container). Thus, a lid material having a half-cut shape that does not cause a manufacturing defect is also desired.

JP 2000-309330 A JP 2001-58627 A

The present invention is intended to solve the above-mentioned problems, and in particular, a lid material which is cut along the surface of the lid described later and cut along the surface. The lid material is easily cut off at the time of opening and the lid material is bent. It is an object of the present invention to provide a partially opened lid material having a half-cut shape that does not cause any problems.

  Therefore, the present inventor makes the half-cut shape penetrating the surface sheet inserted as a separation line from the surface of the lid material which is the outer surface of the container into an arc shape so that it is easy to cut at the time of opening and the cross-section is not rough, The present invention has been completed by finding that the lid can be bent without being bent due to the lid being bent at the time of sealing.

  As described above, when putting a half-cut separation line from the surface of the lid material, the shape of the half-cut separation line is not limited to an arc shape, but may be a linear shape including a wave shape or a bend, and particularly the width and height of the shape. We have found that it becomes more effective by forming the relationship within a certain range.

The invention according to claim 1 of the present invention for solving the above-mentioned problem is a lid material comprising a composite sheet and a surface sheet that are thermally welded and sealed to the outer edge of the opening of the container body, and is a composite sheet And the topsheet are laminated and bonded to each other in a predetermined shape region, which is partitioned by an easy peel region formed by applying an easy peel agent in a pattern and an adhesive region other than that.
The composite sheet in the easy peel region is provided with an adhesive region corresponding to the shape of the discharge hole, a discharge hole forming half cut, and a peel start half cut, and the top sheet has a boundary region between the easy peel region and the adhesive region. A partially opening lid material in which a cut-off portion is formed by a non-linear half-cut.

In the invention according to claim 2 of the present invention, the relationship between the width a and the height b of the shape of the cut portion formed by the half cut formed in the boundary region between the easily peelable region and the adhesive region of the topsheet is (1/10). ) <(B / a) <(1/3). The partial opening lid material according to claim 1, wherein:

  The invention according to claim 3 of the present invention is the partial opening lid member according to claim 1 or 2, wherein the peeling start half-cut comprises a plurality of intermittent half-cuts.

  The invention according to claim 4 of the present invention is a granular material storing package using the partial opening lid material according to any one of claims 1 to 3.

  The partial opening lid material of the present invention according to claim 1 is formed by forming a separation part by a non-linear half-cut formed in a boundary region between an easily peelable region and an adhesive region on the surface sheet. Compared to the case where the cut-off part is formed in a straight line, it is easier to cut off when opening, the cross-section is not rough, and the lid material is bent when filling (especially when sealing to a container). It can be a lid that does not occur.

  Moreover, it is a cover material which consists of a composite sheet and a surface sheet which are thermally welded and sealed to the outer edge of the opening of the container body, and the composite sheet and the surface sheet apply an easy-release agent in a predetermined shape region in a pattern shape Because it is partitioned by the easy peeling region by the easy peeling layer formed by this and the other adhesive region and laminated and bonded to each other, and the composite sheet on the inner surface side is tightly sealed over the entire circumference of the opening of the container body In addition to securing the content protection during storage, the force applied to the lid material at the time of opening is also dispersed, so that deformation of the opening caused by local breakage can be prevented.

  Further, the composite sheet in the easy-peeling region is provided with an adhesive region corresponding to the shape of the discharge hole and a discharge hole forming half cut, so that the discharge hole is not drilled in advance in the composite sheet. A desired discharge hole corresponding to the shape can be formed at the time of opening. Since it is not necessary to make a discharge hole in the composite sheet beforehand, the characteristics as a packaging material such as barrier properties required at the time of storage are not deteriorated.

In the partially opening lid material of the invention according to claim 2, the relationship between the width a and the height b of the shape of the cut portion formed by the half cut formed in the boundary region between the easily peelable region and the adhesive region of the topsheet is (1 / 10) <(b / a) <(1/3), it is easy to open and the lid itself can be made into a shape that is not easily bent.
When the height b of the half cut is shorter than the range of 1/10 to 1/3 with respect to the width a, the lid material tends to bend, and when the height b is longer than this range, the resistance at the time of opening increases. The possibility of unsuccessful opening due to catching or the like increases.

According to the partial opening lid material of the invention according to claim 3, it is possible to give a width to the position of the seal by inserting a plurality of intermittent half cuts as described above, and the positions of the half cut and the seal are high. Does not require accuracy. And since the half cut is intermittent, the member between the half cuts does not fall off.
In this way, the peeling start half-cut is composed of a plurality of intermittent half-cuts, so it is possible to completely seal the lid and the container body without having to seek very high positional accuracy. A lid material that can be easily opened and a package for storing powder fluid using the same can be formed.

As described above, according to the partially opened lid material of the present invention, the shape of the half cut that penetrates the surface sheet inserted as a separation line from the surface of the lid material that is the outer surface of the container is a non-linear shape such as an arc shape. The lid can be easily cut off at the time of opening and the cross section is not roughened, and the lid can be bent at the time of filling (especially at the time of sealing to a container), etc., so that a manufacturing defect does not occur.

It is a general-view figure when the example of the partial opening lid | cover material of this invention is seen from the front. It is a section schematic diagram of the example of the partial opening lid material of the present invention. It is an expanded sectional schematic diagram in the X-X 'line of the example of the partial opening lid | cover material of this invention. It is a general-view figure when the example of the conventional lid | cover material is seen from the front. It is a general-view figure when the example of the conventional lid | cover material is seen from the front. It is a general-view figure when it sees from the front of the example of the conventional lid | cover material. The top is before opening, the bottom is when opening.

An example of an embodiment of a lid according to the present invention will be described with reference to FIGS.
The partially peeled lid material (41) of the present invention is a lid material composed of a composite sheet (52) and a surface sheet (51) that is thermally welded and sealed to the outer edge of the opening flange (42) of the container body (40). It is.
Easy peelable area (A) by easy peelable layer (55) formed by applying easy peelable agent in pattern to composite sheet (52) and topsheet (51) and other adhesive areas (B) and are laminated and bonded together.

An adhesive region corresponding to the shape of the discharge hole (47) and a discharge hole forming half cut (47a) surrounding the discharge hole (47) are provided at one or a plurality of positions of the composite sheet (52) in the easy peeling region (A). In the surface sheet (51), a cut-off portion by a half cut (46a) is formed in a boundary region between the easy-peeling region (A) and the bonding region (B).
This half cut (46a) has a pull tab (4) in a part thereof, and the base of the pull tab is an opening start portion (5).
Further, a peeling start half cut (48a) comprising a plurality of intermittent half cuts penetrating the composite sheet is formed at the opening start portion. It should be noted that at least two or more peeling start half cuts (48a) may be formed, and the number and shape are not particularly limited.

  The partial opening lid material (41) of the present invention has a cut-off portion by a half cut (46a) provided in a boundary region between the easy-peeling region (A) and the bonding region (B) of the topsheet (51) in FIG. As shown, the central portion is formed in a bulging shape with respect to the container width direction. By doing in this way, when peeling a cover material from an opening start part, it can open easily, without breaking.

  There are no particular restrictions on the material and configuration of the top sheet (51) and the composite sheet (52), but various performances required for the entire lid member, operability when peeling the top sheet, and further economics, etc. In order to be satisfied, the most preferred configuration is determined.

Pulling the topsheet (51) in the easy-release region (A) by pulling the topsheet (51) at the opening start portion along the cut-off portion by the halfcut (46a) starting from the halfcut (48a) for starting peeling By removing the composite sheet (52) inside the discharge hole half cut (47a) along with the top sheet (51), the discharge hole (47) can be exposed.

At this time, the ease of opening and the opening state differ depending on the shape of the half cut surrounding the separation part, and the shape swelled from the easily peelable region toward the adhesive region like the partially opened lid material of the present invention is broken or folded. It can be opened easily with few defects at the time of peeling.
The shape of the half-cut need not be an arc shape, and may be a curved line that is wavy in the width direction or a shape that is formed by a straight bend from the point of preventing middle folding, but is a continuous half-cut. It is desirable.

FIG. 4 shows a schematic diagram of an example of a conventional lid material in which the shape of the half cut is a straight line. Thus, when the shape of the half-cut is a straight line, the lid material is easily broken (half-folded) at the position of the half-cut at the time of the manufacturing process or opening, and troubles are likely to occur particularly when sealing to a container or the like.
FIG. 5 shows a schematic diagram of an example of a conventional lid member in the case of an intermittent straight line in which the shapes of the half-cut lines are randomly arranged. Thus, when the half cut is intermittently provided, there is a problem that not only a large force is required for peeling, but also the generation of paper powder at the manufacturing process and opening cannot be ignored. The same applies to the case where the shape of the half-cut line is an intermittent curve.

On the other hand, according to the partially opened lid material of the present invention shown in FIG. 1, the above problems are solved or reduced. However, the effect varies depending on the characteristics of the half-cut shape. If the ratio of the half-cut height (b) to the half-cut width (a) shown in FIG. 1 is small and 1/10 or less, the half-cut is close to a straight line and is likely to be bent. If this ratio is 1/3 or more, it will be more difficult to bend halfway, but not only will more force be required for peeling, but the cover will also be peeled off and unintentionally broken.
Therefore, the ratio of the half cut height (b) to the half cut width (a) is preferably in the range of 1/10 to 1/3.

  As shown in FIG. 1, the position and shape of the peeling start half-cut (48a) are a plurality of intermittent half-cuts (48a) in the direction substantially perpendicular to the peeling direction at the base of the pull tab (4). Is formed. In the figure, a half cut (46a) from the front that penetrates the top sheet (51) for partial peeling, and a half cut (47a) from the back that penetrates the composite sheet (52) for forming the opening hole (47). ), And a flange (42) serving as an edge of the container main body, and a peeling start half cut (48a) that is a half cut from the back that penetrates the composite sheet (52), which is a starting point of peeling.

  When a plurality of continuous half cuts are inserted as the peeling start half cuts, there is a possibility that the cover material between the plurality of half cuts partially falls off and is mixed into the container. In addition, when only one half-cut for starting peeling is inserted, there is a risk that peeling may not occur due to the overlap with the seal part on the flange part of the container body. Very high accuracy is required for the position and the sealing position to the container.

  On the other hand, according to the partially peeled lid material of the present invention, it is possible to give a width to the position of the seal by inserting a plurality of intermittent half cuts as described above, and the half cut is intermittent. Parts between cuts do not fall off. And high accuracy is not required for the positions of the half cut and the seal. Also, it is desirable that these intermittent half cuts are alternately inserted as seen from the peeling direction as shown in FIG.

Next, the usage method of the container using the partial opening lid | cover material (41) which concerns on this embodiment is demonstrated with reference to FIG.1, FIG.2, FIG.3.
The container (40) is filled with contents such as a powder bath, and the partially peeled lid (41) is heat-sealed to the flange (42) of the container body (40). At the time of opening, the pull tab (4) is first lifted, and after opening a little along the half cut (46a) of the opening start portion starting from a plurality of peeling start half cuts (48a), the top sheet (51) The part of the easy peeling area (A) is pulled up to remove only the top sheet (51). At this time, a discharge hole half cut (47a), which is a half cut penetrating only the composite sheet, is provided in a portion corresponding to the periphery of the discharge hole (47), so that the discharge hole (47) is exposed by this operation. To do. The container is then tilted to discharge the required amount of contents from the discharge hole.

As the most general layer structure of the partially peeled lid material of the present invention, for example, as shown in FIG. 3, as a surface sheet (51), stretched film (21) / paper (22) / polyolefin adhesive Resin (25) / easy release layer (55), composite sheet (52) in the order of biaxially stretched film (26) / adhesive / gas barrier layer (23) / adhesive resin layer / sealant layer (27) Is mentioned. In addition, you may provide an easily peelable layer (55) in any of a surface sheet (51) or a composite sheet (52).
Lamination of these layer configurations can be performed by a known method such as dry lamination or extrusion lamination.

As the stretched film (21) used for the partially peeled lid material of the present invention, a biaxially stretched polyethylene terephthalate resin (PET) film, a biaxially stretched PP film (OPP), a biaxially stretched nylon film, or the like is used.
The paper (22), a basis weight of ^75g / ^{m 2 ~130g} / m 2 about one-sided art paper or single-sided coated paper, quality paper, or the like. Further, the surface of the paper is usually subjected to printing necessary as a final product, protective varnish, or the like.

Examples of the polyolefin adhesive resin (25) include a low density polyethylene (LDPE) resin, a high density polyethylene (HDPE) resin, a linear low density polyethylene (LLDPE) resin, a polypropylene (PP) resin, and a polyolefin elastomer. A polyolefin resin is used.
As the biaxially stretched film (26), a biaxially stretched polyethylene terephthalate resin (PET) film, a biaxially stretched PP film (OPP), a biaxially stretched nylon film, or the like is used.

As the gas barrier layer (23), a metal foil such as an aluminum foil, or a gas barrier film such as a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate film, Inorganic oxide vapor-deposited film in which inorganic oxide such as aluminum oxide or silicon oxide is vapor-deposited on PET film, etc., or film or metal alkoxide containing polyvinylidene chloride coating, water-soluble resin and inorganic layered compound or its hydrolysis A gas barrier coating layer such as a resin layer made of a film obtained by reacting a product with an isocyanate compound can be used.

In the case where an aluminum foil having a thickness of 5 μm or more and 15 μm or less is used for the composite sheet as the gas barrier layer (23), the light shielding property is sufficiently ensured in addition to the gas barrier property. Especially when using a soft aluminum foil, when the upper sheet of the discharge hole part is peeled off, the elastic repulsion force generated in the direction in which the lower sheet inside the discharge hole half cut is separated from the upper sheet is reduced, and The opening retention required when opening the discharge hole can be imparted.
If the aluminum foil has a thickness of more than 15 μm, it is not preferable because it has too much waist, and it is economically inferior.

As the sealant layer (27), polyolefin resin is generally used. Specifically, low density polyethylene, medium density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / α-olefin are used. Copolymers, ethylene resins such as ethylene-methacrylic acid resin copolymers, blend resins of polyethylene and polybutene, homopolypropylene, propylene / ethylene random copolymers, propylene / ethylene block copolymers, propylene / α Polypropylene resins such as olefin copolymers are used.

As an easy-release agent for forming the easy-release layer (55), an edible surfactant such as lecithin, a coating agent composed of a mixture of digested cotton adhesive and wax or silicon (0.2 to 20 μm thick) Etc.) can be used, and an easily peelable layer can be obtained by applying and drying by a known method such as gravure printing.
The method of laminating the easy-peeling layer (55) is preferably a method of laminating a varnish made of the above-described easy-peeling agent on one side of the biaxially stretched film by gravure printing and laminating another substrate.

Next, the processing method of a laminated body is demonstrated.
As a component of the laminate used for the partially peeled lid material of the present invention, first, as shown in FIG. 3, a linear low-density polyethylene resin having low-temperature adhesiveness that facilitates thermal welding with the container body (40) in advance. A composite sheet (52) produced by applying a sealant (27) comprising a gas barrier layer such as an aluminum foil (23) and laminating a biaxially stretched film (26) to the opposite surface via a urethane adhesive. create.

Separately, a stretched film (21) is bonded to the rolled paper (22) by the dry laminating method through the urethane adhesive layer on the front side in the same process on the front and back by the gravure printing method, and edible on the back side. A surface sheet (51) produced by printing an easy-release agent formed by mixing silicon with a surfactant is exposed to an adhesive layer composed of the composite sheet (52) and a polyethylene resin (not shown). A laminated material is produced by laminating using a ruder.

  Subsequently, the laminated roll-shaped laminated material is largely cut into a single sheet, and then a half cut process (46a) that penetrates the top sheet having the shape shown in FIG. 1 and a half cut process that penetrates the composite sheet ( 47a), (48a), and (48a) are performed (there is a case where half-cut processing is performed in the form of a winding). Is made. (Small cutting and punching may be performed at the same time as half-cutting.)

Then, the powder using the lid material of the present invention is prepared by filling the contents of the partially peeled lid material into a pre-molded container body (made of foamed polystyrene, polystyrene, polypropylene, etc.) and then sealing with a heat seal method. A particle storage package can be prepared.

<Example 1>
As a component of the laminate, a sealant (27) made of a linear low-density polyethylene resin having a thickness of 25 μm was applied to an aluminum foil (23) having a thickness of 9 μm, and a biaxially stretched polyethylene terephthalate having a thickness of 12 μm was formed on the opposite surface. A composite sheet (52) was prepared by laminating the film (26) with a urethane adhesive.

Separately, stretched polyethylene terephthalate with a thickness of 12 μm by gravure art paper (22) with a grammage of 84.9 g / m ^{2 in} the same front and back by gravure printing method and dry lamination method with urethane adhesive layer on the surface side The surface sheet (51) was created by laminating the film (21) and printing on the back side an easy-release agent obtained by mixing edible surfactant with silicon.
The surface sheet (51) and the composite sheet (52) were laminated using an extruder with an adhesive layer made of a polyethylene resin (not shown) having a thickness of 25 μm to produce a laminated material.

  Subsequently, the laminated roll-shaped laminated material is largely cut into a single sheet, and then a half cut process (46a) that penetrates the top sheet having the shape shown in FIG. 1 and a half cut process that penetrates the composite sheet ( 47a), (48a), and (48a) were performed, and after the half-cut was completed, it was cut into small pieces and subjected to a punching process to produce a partially peeled lid material (41) of the present invention. At this time, the ratio b / a of the width (a) to the height (b) of the half cut process (46a) penetrating the surface sheet was set to 1/6.

Then, the container body (height 145.8 mm, upper size 85 mm × 116 mm) filled with a powder bathing agent as a content is filled in the partially peeled lid material, and sealed by a heat seal method. Thus, a filled container using the lid material of the present invention was prepared.

<Example 2>
The present invention is the same as in Example 1 except that the ratio b / a of the width (a) to the height (b) of the half cut processing (46a) having the shape shown in FIG. A filled container using the lid material of was prepared.

<Example 3>
The present invention is the same as in Example 1 except that the ratio b / a of the width (a) to the height (b) of the half cut process (46a) having the shape shown in FIG. A filled container using the lid material of was prepared.

<Comparative Example 1>
As a component of the laminate, a sealant (27) made of a linear low-density polyethylene resin having a thickness of 25 μm was applied to an aluminum foil (23) having a thickness of 9 μm, and a biaxially stretched polyethylene terephthalate having a thickness of 12 μm was formed on the opposite surface. A composite sheet (52) was prepared by laminating the film (26) with a urethane adhesive.

Separately, stretched polyethylene terephthalate with a thickness of 12 μm by gravure art paper (22) with a grammage of 84.9 g / m ^{2 in} the same front and back by gravure printing method and dry lamination method with urethane adhesive layer on the surface side The surface sheet (51) was created by laminating the film (21) and printing on the back side an easy-release agent obtained by mixing edible surfactant with silicon.
The surface sheet (51) and the composite sheet (52) were laminated using an extruder with an adhesive layer made of a polyethylene resin (not shown) having a thickness of 25 μm to produce a laminated material.

  Subsequently, the laminated roll-shaped laminated material is largely cut into a sheet, and then half cut processing (46a) that penetrates the linear surface sheet having the shape shown in FIG. 4 and half penetration that penetrates the composite sheet. The cut-off processing (47a), (48a), and (48a) were performed, and after the half-cut was completed, the cut piece was cut and punched out to prepare a partially peeled lid material (41).

Then, the container body (height 145.8 mm, upper size 85 mm × 116 mm) filled with a powder bathing agent as a content is filled in the partially peeled lid material, and sealed by a heat seal method. A filled container was created.

<Comparative example 2>
A filled container was prepared in the same manner as in Comparative Example 1 except that the shape of the half-cut process (46a) penetrating the surface sheet was changed to an intermittent linear shape as shown in FIG.

Using the filled containers created in Examples 1 to 3 and Comparative Examples 1 and 2, a comparative evaluation was performed on the ease of handling at the time of opening due to the shape of a half cut penetrating the top sheet of each lid member. .
As evaluation items, there were three points of foreign matter generation, defects at the time of peeling, and difficulty in breaking, and each was rated as “O” when there was no problem, “X” when there was a problem, and “△” when there was a problem. The results are shown in Table 1.

From this evaluation result, filled in Example 1 in which the ratio b / a of the width (a) to the height (b) of the half-cut processing (46a) of the shape of FIG. In the container, no foreign matter was generated at the time of opening, there was no problem due to high resistance at the time of peeling, and the lid material was difficult to break.
Moreover, in the filled container of Example 2 in which the ratio b / a of the width (a) to the height (b) of the half-cut processing is 1/10, there is no generation of foreign matters at the time of opening, and resistance at the time of peeling. However, the lid material was less likely to be broken, but the difficulty of folding was slightly inferior to that of Example 1.
Further, in the filled container of Example 3 in which the ratio b / a of the width (a) to the height (b) of the half-cut processing is 1/3, no foreign matter is generated at the time of opening, and the lid material is medium. Although it became a container that did not break easily, the resistance at the time of peeling was slightly higher, and there were signs of paper peeling.

  From the above results, it is desirable that the ratio b / a of the width (a) to the height (b) of the half cut process (46a) penetrating the top sheet is in the range of 1/10 to 1/3. It has been shown that when (b) is shorter than that range, it becomes easier to bend, and when it is longer than that range, the resistance at the time of opening increases, and the possibility of poor opening due to catching or the like increases.

In the filled container of Comparative Example 1 in which the shape of the half-cut processing (46a) is linear, no foreign matter is generated at the time of opening and there is no problem due to high resistance at the time of peeling, but the lid material is folded halfway. It became a container to end up.
In the filled container of the comparative example 2 of the linear shape in which the shape of the half-cut processing (46a) is intermittent, the occurrence of foreign matters such as paper dust at the time of opening occurs, and there is a problem such as paper peeling due to high resistance at the time of peeling. However, it was a container that was difficult to use, although there was no break in the lid.

  As described above, according to the partially opened lid material of the present invention, there is no generation of foreign matter at the time of opening, there is no problem due to high resistance at the time of peeling, and the lid material becomes a container that is not easily broken, which can be easily opened. We were able to provide a partial opening lid that can be used.

  The partially opened lid material of the present invention is a container for storing granular and powder contents, and the lid material used is mainly paper, and only a part along the half cut formed on the top of the lid material. The container can be applied to a container that needs to prevent the lid from being bent while reducing the resistance at the time of opening.

A ... Easy peeling area B ... Adhesion area 1 ... Container body 2 ... Cover material 3 ... Sealing part 4 ... Pull tab 5 ... Opening start point 21 ... Stretched film 22 ... Paper 23 ... Gas barrier layer 26 ... Biaxially stretched film 27 ... Sealant 40 ... Container body 41 ... Cover material 42 ... Flange 46a ... Half cut 47 ... Discharge hole 47a ... Half cut 48a for forming discharge hole ... Half cut 51 for peeling start ... Top sheet 52 ... Composite sheet 55 ... Easy peel layer

Claims (4)

  A cover material composed of a composite sheet and a surface sheet that are thermally welded and sealed to the outer edge of the opening of the container body, and the composite sheet and the surface sheet are applied to the predetermined shape region by applying an easy-release agent in a pattern. The composite sheet in the easy-peeling region is divided into an easy-peeling region formed by the easy-peeling layer and the other adhesive region, and is laminated and bonded to each other. A partial opening lid characterized in that a half cut and a half cut for initiating peeling are provided, and the top sheet is formed with a non-linear half cut separating portion in a boundary region between the easy peeling region and the adhesive region Wood.   The relationship between the width “a” and the height “b” of the shape of the cut portion formed by the half cut formed in the boundary region between the easily peelable region and the adhesive region of the topsheet is (1/10) <(b / a) <(1 / The partial opening lid material according to claim 1, which falls within the range of 3).   The partial opening lid member according to claim 1 or 2, wherein the peeling start half-cut comprises a plurality of intermittent half-cuts.   A package for storing granular materials, wherein the partially opened lid material according to any one of claims 1 to 3 is used.