JP6531358B2 - Inner seal material - Google Patents

Description

  The present invention relates to an inner sealing material for sealing the mouth of a container body filled with coffee powder, cream powder, chemical seasoning and the like.

  For example, an inner seal material for sealing is sealed in a mouth such as a glass bottle filled with coffee powder, cream powder, etc. in order to protect the contents from moisture. Further, the container is screwed or fitted with a cap from above the inner sealing material to form a sealed container.

  In order to open the inner sealing material, as shown in FIG. 8A, there is a method in which the inner sealing material 50 is partially removed from the container opening 6 to form the opening 5. However, there is a problem that it is difficult to pick the outer peripheral edge of the inner seal material and to form the opening. Although there is also a method of providing a protruding portion on the outer peripheral edge of the inner sealing material to make it a knob, there is a problem that the presence of the protruding portion makes it difficult to screw or fit with the cap.

  There is also a method of forming an opening on a part of the inner sealing material with a cutter blade or the like, but it takes time and there is also a risk of injury.

  There is also a proposal in which an easy-breaking line for forming an opening in advance is provided in the inner sealing material (Patent Document 1). It is proposed that the easy break line formed in the inner seal member 50 is broken and the portion surrounded by the break line is removed to form the opening 5. An example is shown in FIG. 8-2. However, there is a problem that the part to be removed falls into the container.

  In addition, there is a proposal separately providing a breakable line for forming an opening in advance in the inner sealing material (Patent Document 1). This is to break away with a finger along the easy break line to form an opening. However, due to the pushing force, the opening may be broken in an unintended direction and a desired opening may not be made.

Unexamined-Japanese-Patent No. 1-267167 JP 2002-337920 A

  An object of the present invention is to provide an inner sealing material which can stably form a desired opening in view of the problems of the background art.

  In order to solve the above-mentioned subject, inventors conducted earnest examination and completed the present invention.

The invention according to claim 1 of the present invention is an inner seal material comprising a laminated sheet in which at least a gas barrier layer, an intermediate layer and a sealant layer are laminated and sealed at a container opening to form a sealed container, the inner seal An opening forming portion is formed in the material by a U-shaped opening cutting line whose both ends are directed in the peripheral direction, and an opening which is disposed on the extension of both ends of the opening cutting line and at least a part of which is linear. It is an inner seal material characterized in that a stop line is formed, and an end of the open stop line is formed outside the end of the open score line .

The invention according to claim 2 of the present invention is the inner seal material according to claim 1, characterized in that the opening stop line is formed in a V shape.

The invention according to claim 3 of the present invention is the inner sealing material according to claim 2 , wherein the distance between the opening stop lines is 0.5 to 1.5 mm.

In the invention according to claim 5 of the present invention, the opening stop line is inclined toward the container opening at an angle of 0 to 30 ° with respect to a line connecting both ends of the opening cut line. The inner seal material according to any one of claims 1 to 4 , characterized in that

The invention according to claim 4 of the present invention, an end portion of the opening stop line, outside the end of the opening score line, according to claim 1 to 3, characterized in that formed by spaced apart respectively 3mm or more It is an inner seal material given in any 1 paragraph.

  The invention according to claim 7 of the present invention is characterized in that the open score line and the open stop line are half-cut from the sealant layer to the intermediate layer of the laminated sheet. It is an inner sealing material described in item 1.

  The inner seal material of the present invention can break the opening formation portion along the opening score line, and even if the opening is formed, the opening stop line can receive the pushing force and form the opening. The openings can form desired openings without breaking in an unintended direction.

  Further, the shape of the opening stop line is formed from the both ends of the opening stop line toward the inside of the container opening from the outside of the opening cutting line respectively, and the intersecting points connect the both ends of the opening cutting line By forming a V shape formed near the container opening close to the center line of the line, the force that pushes the opening formation part is firmly received by the opening stop line, and the tear in an unintended direction Can be formed to form the desired opening.

  In addition, an opening stop line is disposed at the end of the opening cutting line and both ends, and the distance between the end of the opening cutting line and the opening stop line is 1.5 to 2 mm, respectively. The force to break through can be firmly received by the opening stop line, to prevent tearing in an unintended direction, and the opening can be formed.

  In addition, when the opening stop lines are three or more at equal intervals in parallel and the interval is 0.5 to 1.5 mm, it is possible to firmly receive the force pushing the opening formation portion. The desired opening can be formed stably.

  Further, the opening stop line is inclined toward the container opening at an angle of 0 to 30 ° with respect to the line connecting the both ends of the opening cutting line, and thus the force to break the opening formation portion Can be concentrated inside the open stop line to prevent tearing in an unintended direction.

  In addition, the end of the open score line is formed 3 mm or more apart on the outer side than the end section of the open score line, thereby making it easy for the open stop line to receive the force that breaks the opening formation portion. Can.

  In addition, it is possible to impart an easy-breakability by forming the open score line and the open stop line from the sealant layer of the laminated sheet to the intermediate layer. Moreover, the bendability in an opening stop line can be provided.

  In the inner seal material of the present invention, the desired opening can be obtained without tearing in an unintended direction even if the opening forming portion is broken by a finger along the opening cutting line to form the opening. is there.

It is a top view which shows an example of the inner sealing material of this invention. It is explanatory drawing which shows an example which formed the opening in the inner sealing material of FIG. It is explanatory drawing which shows an example of the laminated constitution of the inner sealing material of this invention. It is explanatory drawing which shows the state which forms an opening in inner sealing material. It is explanatory drawing which shows an example of the sealed container which used the inner sealing material. It is explanatory drawing of an opening stop line. It is explanatory drawing which shows the state of the opening of a comparative example. It is explanatory drawing which shows an example of the conventional opening.

  Hereinafter, modes for carrying out the present invention will be described.

  FIG. 1 is a plan view showing an example of the inner seal material of the present invention. The inner sealing material 1 shown in FIG. 1-1 is formed in a shape substantially equivalent to the shape of the container opening of the container body. In the inner seal member, the opening score line 2 is formed in a U-shape in which the tip of the opening score line 2 faces the central direction, and the opening formation portion 4 is formed. Moreover, it is distribute | arranged at the tip of the both ends of the opening broken line 2. Three linear open stop lines 3 are formed in parallel at equal intervals. The opening stop lines 3 are formed in parallel at equal intervals.

  Further, in FIG. 1-2, the opening stop line 3 is formed in the direction of the container opening 6 from the outside to the inside of the opening cutting line 2, respectively, and the intersection point is the center connecting the both ends of the opening cutting line It is formed in a V-shape formed close to the adjacent container port 6 on the line.

  FIG. 2 is an explanatory view showing an example in which an opening is formed in the inner sealing material of FIG. The figure shows a state in which the opening 5 is formed by breaking the opening forming portion along the 20 opening broken line with a finger. It is shown that the force for pushing the opening forming portion along the opening broken line with the finger is received by the opening stop line 3 and there is no tear in an unintended direction, and the desired opening 5 is formed. FIG. 2A shows the opening when a straight open stop line is formed at the end of each end of the open score line. Moreover, FIGS. 2-2 is distribute | arranged at the tip of the both ends of the opening score line, and has shown the opening when the letter-like opening stop line formed of the score line is formed.

FIG. 3 is an explanatory view showing an example of the layer configuration of the inner sealing material of the present invention. The laminated sheet 10 shown in FIG. 3-1 includes at least a gas barrier layer 11 / adhesive layer 15 / intermediate layer 12 / adhesive layer 15 / sealant layer 13. In the laminated sheet 10, the opening forming portion 4 is formed by the opening cutting line 2, and the opening stop line 3 is formed. The open score line 2 and the open stop line 3 are half cut from the surface of the sealant layer to the intermediate layer. Also, Figure 3
The laminated sheet 10 shown in FIG. 2 shows an example in which the printing layer 14 is provided on the surface of the gas barrier layer 11 on the upper part of the opening cutting line 2 and the opening stop line 3. The print layer 14 can display the open score lines and the open stop lines to clarify the pushing positions.

  FIG. 4 is an explanatory view showing an example of forming an opening in the inner sealing material. An example is shown in which the opening formation portion is broken apart along the opening cut line of the inner sealing material to form the opening. FIG. 4A shows a state where the finger 20 is pressed against the surface of the gas barrier layer 11 with the print layer 14 printed on the surface of the gas barrier layer 11 as a guide. FIG. 4B shows a state in which the opening forming portion 4 is pushed and broken along the opening cutting line 2. When the finger 20 is pushed in and the opening forming portion 4 is pushed out, the opening 5 is formed. FIG. 4-3 shows a state in which the opening fixing wire 3 receives the pushing force and pushes the opening forming portion 4 inward. The formed opening 5 is formed in the desired shape.

  FIG. 5 is an explanatory view showing an example of a sealed container using an inner sealing material. The inner seal member 1 is sealed and sealed at the container opening 6 of the container main body 32 in which the content which dislikes moisture is stored. Furthermore, the container body is screwed or fitted with a cap from above the inner seal material. Thus, the sealed container 30 is formed. In addition, sealed containers can be formed in the same manner for contents that dislike oxygen.

  FIG. 6 is an explanatory view of the opening stop line. The opening score line 2 is formed in a U-shape whose tip is directed in the central direction, and an opening formation portion 4 is formed. An example is shown which is disposed at the end of both ends of the opening cutting line 2 and three V-shaped opening stop lines 3 are formed in parallel at equal intervals. It is preferable that the distance L of the both ends of the opening cutting line 2 and the opening stop line 3 is 1.5-2 mm, respectively. Moreover, it is preferable that the space | interval M of the opening stop line 3 is 0.5-1.5 mm. Moreover, it is preferable that the opening stop line 3 is inclined in the container opening direction at an angle θ of 0 to 30 ° with respect to a line 7 connecting the both ends of the opening cutting line. In addition, it is preferable that the end of the opening stop line is separated by 3 mm or more from the end of the opening cutting line. By doing so, the opening stop line can firmly receive the force that pushes the opening formation portion, and the desired opening can be formed.

  Furthermore, a mode for carrying out the present invention will be described.

  A water vapor barrier property and an oxygen barrier property are required as the gas barrier layer 11 forming the laminated sheet. Aluminum foil, a film on which aluminum is vapor-deposited, a film on which an inorganic oxide is vapor-deposited, an ethylene-vinyl alcohol copolymer film, a vinylidene chloride film, a polyester film, a polypropylene film and the like can be mentioned.

  As the inorganic oxide, oxides of metals such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide and yttrium oxide can be used. . Among them, silicon oxide, aluminum oxide and magnesium oxide are preferable in terms of productivity and cost.

The sealant layer 13 may be low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-methacrylic acid copolymer (EMAA), ethylene- A film made of a polyolefin resin such as ethyl acrylate copolymer (EAA), ethylene-vinyl acetate copolymer (EVA), ionomer, polypropylene (PP) can be used. These resins can be formed into films by an extruder and used. It can be used in a single layer or multiple layers using the above resin.
Alternatively, these resins may be dissolved in a solvent to form a coating solution, and the coating solution may be laminated by a printing method or a coating method.

  As the adhesive layer 15, an adhesive for dry lamination can be used. For example, two-part curable urethane-based adhesives, polyester urethane-based adhesives, polyether urethane-based adhesives, acrylic adhesives, polyester-based adhesives, polyamide-based adhesives, epoxy-based adhesives, etc. can be used. . The laminating method can be a dry lamination method. Moreover, when bonding an intermediate | middle layer and a sealant layer together, polyethylene resin can also be bonded together by the extrusion sand poly method with an extruder other than the dry laminating method.

  The intermediate layer 12 is laminated to improve the rigidity and tensile strength of the inner seal material. For example, polyester film, polyethylene film, propylene film, etc. can be used.

  In addition, a printing layer 14 such as a pattern is provided on the surface of the gas barrier layer. As a method of forming a printing layer, it is possible by well-known methods, such as gravure, an offset printing, flexographic printing, silk printing, an inkjet printing.

  Next, in order to form an open score line and an open stop line, half cutting is performed so as to penetrate from the surface of the sealant layer of the laminated sheet to the intermediate layer. A half cut can use a well-known method. For example, it can be performed by a punching machine using a Thomson blade, a rotary die cutter, or the like. A slit of a perforation-like discontinuous line etc. are mentioned.

  Hereinafter, specific examples of the present invention will be described.

  9 μm of aluminum foil and 12 μm of polyester film were laminated by a dry lamination method using a two-component curable urethane adhesive.

  Next, on the surface of the aluminum foil, a printing layer was formed by gravure printing using a gravure ink as a standard for forming the aperture score lines and aperture stop lines.

  Next, on the polyester film surface, a linear low density polyethylene film of 30 μm was laminated by a dry lamination method using a two-component curable urethane adhesive and a laminate sheet was prepared.

  Next, the above-mentioned laminated sheet was punched into a shape substantially equivalent to the shape of the container opening of the container body, to form a circular inner sealing material. Under the present circumstances, the opening cut line was formed in U shape where the front-end | tip of this opening cut line turned to center direction, and the opening formation part was formed. As the U-shape, the distance between both ends of the opening score line is 20 mm, and the distance between the tip and the line connecting the both ends is 15 mm. In addition, an opening stop line is formed in a V-shape prior to the end of the opening break line, the length in the horizontal direction is 28 mm, three parallelly formed at equal intervals, and the interval thereof is 1.5 mm. . At this time, the distance between the end of the open cut line and the open stop line was 2 mm. Further, the opening stop line was formed to be inclined in the direction of the container opening at an angle of 15 ° with respect to the line connecting the both ends of the opening cutting line.

  The open score line and the open stop line were formed by half-cutting through the surface of the linear low density polyethylene film of the laminated sheet to the polyester film with a laser. The external shape was performed by a punching machine using a Thomson blade. Under the present circumstances, according to the shape of the container opening part, it pierce | punched so that the inner dimension of the sealing surface in a container opening part might be a perfect circle 80 mm in diameter in circular shape, and the inner sealing material was created.

  Next, the linear low density polyethylene film side of the above inner sealing material was placed on the container mouth of the glass container, and the container was sealed by applying heat pressure, sealing and sealing. A sealed container was produced in which the inner dimension of the sealing surface at the container mouth was a perfect circle with a diameter of 80 mm.

  A sealed container was produced in the same manner as in Example 1 except that the distance between the opening stop lines was 1.0 mm.

  A sealed container was produced in the same manner as in Example 1 except that the distance between the end of the open score line and the open stop line was 1.5 mm and the distance between the open stop lines was 0.5 mm.

  A sealed container was produced in the same manner as in Example 1 except that the distance between the end of the open score line and the open stop line was 1.5 mm, and the distance between the open stop lines was 1.0 mm.

  Example of Example except that the distance between the opening stop lines is 1.0 mm, and the opening stop lines are inclined toward the container opening at an angle of 30 ° with respect to the line connecting both ends of the opening cut line. A sealed container was made in the same manner as 1).

  The example of Example except that the distance between the opening stop lines is 1.0 mm and the opening stop lines are inclined toward the container opening at an angle of 0 ° with respect to the line connecting both ends of the opening break line. A sealed container was made in the same manner as 1).

  Below, the comparative example of this invention is demonstrated.

Comparative Example 1
A sealed container was produced in the same manner as in Example 1 except that the number of the open stop lines was two and the distance between them was 1.0 mm.

Comparative Example 2
A sealed container was produced in the same manner as in Example 1 except that the open score line and the open stop line were not formed.

Comparative Example 3
A sealed container was produced in the same manner as in Example 1 except that a laminated sheet was formed using 30 g / m 2 of paper instead of the polyester film 12 μm, and the open cut line and the open stop line were not formed.

<Evaluation method>
The state where the opening was formed was evaluated by breaking the opening forming part with a finger and breaking the inner sealing material. The opening stop line received the opening, the one capable of forming the opening was ○, and the one not capable was を.

  The evaluation results are shown in Table 1.

実施例１〜６の結果から、開口口は、開口止め線で開封が止まり、問題なく形成できた。

From the results of Examples 1 to 6, the opening stopped at the opening stop line and could be formed without any problem.

DESCRIPTION OF SYMBOLS 1 inner sealing material of this invention 2 opening line 3 opening stop line 4 opening formation part 5 opening 6 container opening 7 line connecting end of opening line 10 laminated sheet 11 gas barrier layer 12 intermediate layer 13 sealant layer 14 printing layer 15 adhesive layer 20 finger 30 sealed container 31 cap 32 container body 40 state of opening of comparative example 50 conventional inner sealing material L distance between end of opening score line and opening stop line M between opening stop line Distance N Distance between the end of the open score line and the end of the open stop line θ The inclination angle of the open stop line (with respect to the line connecting the ends of the open break line)

Claims (6)

  An inner sealing material comprising at least a laminated sheet in which a gas barrier layer, an intermediate layer, and a sealant layer are laminated, and sealed at a container opening to form a sealed container, wherein the inner sealing material has both ends facing in the circumferential direction An opening forming part is formed by the letter-like opening cutting line, and an opening stopping line which is disposed on the extension of both ends of the opening cutting line and at least a part of which is linear is formed. An inner seal member characterized in that an end portion is formed outside the end portion of the opening score line.   The inner seal material according to claim 1, wherein the opening stop line is formed in a V-shape. The inner sealing material according to claim 2 , wherein a distance between the opening stop lines is 0.5 to 1.5 mm. The inner seal member according to any one of claims 1 to 3 , wherein the end of the opening stop line is formed at a distance of 3 mm or more outside the end of the opening score line. . Said aperture stop line, relative to a line connecting both ends of the opening cut line, any claim 1-4, characterized in that inclined container opening direction at angles of 0 to 30 ° Inner seal material described in 1 or 2. The inner seal material according to any one of claims 1 to 5 , wherein the open score line and the open stop line are half-cut from the sealant layer to the intermediate layer of the laminated sheet.

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