JP2006240653A - Easily unsealable container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily unsealable container which is easy to unseal when it is unsealed, less in adhesion of a content at an unsealed opening and staining of hands, and capable of avoiding generation of pin holes at a half-cut line. <P>SOLUTION: Two sheet-forming container bodies 100 peripherally provided with a content storing part 110 on the center side and a heat sealing flange part 120 on its outer periphery overlap on upper faces of the heat sealing flange part each other, and are communicated with an unsealing port of the content storing part to form a non-heat sealed part 130 not reaching an outer peripheral end of the heat sealing flange part on the outer side thereof and heat sealed. A half-cut line 121 passing over the non-heat sealed part from a left end of the heat sealing flange part and reaching a right end of the heat sealing flange part is formed on an outer face of both or one heat sealing flange parts of the sheet forming container bodies. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an easily openable container for storing liquid contents such as shampoo and liquid chocolate.

  Conventionally, as a sealing method of a sheet molding container body in which a flange portion for heat fusion is provided around the outer periphery of the content storage portion, the upper surfaces of the flange portions for heat fusion of the two sheet molding container bodies are overlapped with each other. A sheet-like lid material is heat-sealed and sealed on the upper surface of the heat-sealing flange portion of the sheet-molded container main body containing the contents and sealed in a state where the objects are stored. It was sharp. In addition, an easy peel resin layer is formed on the container inner layer of the lid material sheet so that it can be easily opened when using the container, and an easy peel property is formed on the container inner side of the molding sheet of the sheet molded container body. What formed the resin layer was used.

  By the way, in the conventional opening method using the easy-peeling resin layer, the contents adhered to the upper surface of the heat-sealing flange portion of the sheet-molded container body, and the hands were contaminated. In particular, in the case of a portion pack (disposable small-sized single-use container), the ratio of the flange portion to the content storage portion increases, so that the content on the upper surface of the flange portion is conspicuous and the hands are contaminated. It was easy. For this reason, for example, as shown in FIGS. 4 (a) and 4 (b), the upper surfaces of the heat-sealing flange portions (120) of the two sheet-molded container bodies (100) are overlapped to store the contents. In the container to be heat-sealed and sealed, on the upper and lower outer surfaces including the opening (111) of the contents storage portion (110) and the flange portion for heat fusion, the left side of the flange portion for heat fusion When a half-cut line (121) (cut to the middle position of the wall thickness) that passes from the end to the right end of the heat-welding flange portion through the content storage portion is applied with a cutter blade or a laser beam and opened. It has been studied to fold and open the half-cut line. Moreover, as shown to Fig.5 (a) or (b), a sheet-like lid | cover material (200) is provided in the upper surface of the flange part (120) for heat fusion of the sheet forming container main body (100) which stored the content. The container to be heat-sealed and sealed includes a heat-sealing outer surface including an opening portion (111) and a heat-sealing flange portion (120) of the contents storage portion (110) of the sheet forming container main body. It has been studied to apply a half-cut line (121) processing from the left end of the wearing flange portion to the right end of the heat-melting flange portion with a cutter blade or a laser beam. However, if half-cut line processing is performed on the raw sheet before forming the sheet-forming container body, there is a concern that the half-cut line is opened during forming and a pinhole is generated. In addition, it is difficult to perform half-cut wire processing with a cutter blade in succession to the outer surface to be opened including the opening opening portion of the content storage portion of the molded sheet body after molding and the flange portion for heat fusion. Even in the half-cut line processing, the half-cut line with a uniform depth is processed by focusing on the outer surface of the opening part of the three-dimensional contents storage part and the outer surface of the flat heat-sealing flange part. That was difficult.

  The present invention solves the problems of the above-mentioned conventional container body formed by sheet molding, and is easy to open when opening, with less adhesion of contents of the opening and hand contamination, half cut It is an object of the present invention to provide an easily openable container that can avoid the occurrence of pinholes in the wire.

That is, according to the first aspect of the present invention, the content storage portion on the center side and the two sheet-molded container bodies having the heat-welding flange portion around the outer periphery thereof are overlapped with the upper surfaces of the heat-welding flange portions. The unsealed fusion part that does not reach the outer peripheral end of the flange part for heat fusion by communicating with the opening part of the contents storage part, and both the sheet molding container main body or An easily openable container characterized in that a half cut line is formed on the outer surface of one of the heat-welding flange portions from the left end of the heat-welding flange portion to the right end through the non-heat-welded portion. It is.

  Next, according to a second aspect of the present invention, an easily openable container according to the first aspect is characterized in that the sheet-molded container body is formed from a single-layer sheet of a thermoplastic resin that can be heat-sealed. It is.

  Next, the third invention of the present invention is the first invention characterized in that the sheet-molded container body is formed by sheet-molding a multilayer sheet having a thermoplastic resin layer capable of being thermally fused to the heat-sealing side layer. It is an easy-open container described in 1.

  Next, the fourth invention of the present invention is capable of heat-sealing on the upper surface of the heat-welding flange portion of the sheet-molded container body in which the center content storage portion and the heat-welding flange portion are provided on the outer periphery thereof. A sheet-like cover material is overlaid, and communicated with the opening of the contents storage part to form an unheated fusion part that does not reach the outer peripheral edge of the flange part for thermal fusion to the outside. In addition, a half cut line is formed which passes from the left end of the lower outer surface of the heat-welding flange portion of the sheet-molding container body and / or the upper outer surface of the lid material to the right end through the non-heat-bonded portion. This is an easy-open container.

  Next, according to a fifth aspect of the present invention, the easily-openable container according to the fourth aspect is characterized in that the sheet-molded container body is formed by sheet-molding a single-layer sheet of a thermoplastic resin that can be heat-sealed. It is.

  According to a sixth aspect of the present invention, there is provided the fourth aspect of the invention, wherein the sheet-molded container body is formed by sheet-molding a multilayer sheet having a thermoplastic resin layer that can be thermally fused to the heat-sealing side layer. It is an easy-open container described.

  The easily openable container in which the top surfaces of the heat-sealing flange portions of the two sheet-forming container bodies of the present invention are overlapped and heat-sealed is heated on the outer surface of both or one of the heat-sealing flange portions of the sheet-forming container body. A half-cut line is formed to open from the left end of the fusing flange part to the right end through the unheated fused part. Since it is formed on the outer surface of the fusing flange part, it is easy to process with a cutter blade or laser beam at a uniform depth, the opening force can be controlled uniformly and it is easy to open, and pinholes etc. are generated on the half cut line There is little fear to do.

  In addition, the easy-open container formed by heat-sealing a sheet-like lid material on the top surface of the heat-sealing flange portion of the sheet-forming container body of the present invention has a lower outer surface of the heat-sealing flange portion of the sheet-forming container body and A half cut line that passes from the left end of the upper outer surface of the lid material to the right end through the unheated portion is formed, and this half cut line is formed into a flat sheet at an unformed portion. Because it is formed on the lower surface of the flange part for heat fusion of the container body or the upper surface of the lid material, it is easy to process with a cutter blade or a laser beam at a uniform depth, the opening force can be controlled uniformly, and opening is easy. There is little risk of pinholes on half-cut lines.

  In addition, the easy-open container of the present invention, when opening, bends and breaks the half-cut line to open the unheat-sealed portion of the heat-sealing flange portion that communicates with the opening opening portion of the contents storage portion. Since the opening is small and the contents are less attached, there is little chance of contaminating hands when opened. In addition, since the opening is small, it is used by pressing the contents storage part from the outside to push out the contents, but even if the contents remain in the contents storage part, the contents are removed from the container. Is difficult to spill.

  Next, an embodiment of the easy-open container of the present invention will be described in detail with reference to the drawings.

  Fig.1 (a) is a top view of the easily openable container of one Embodiment or Example 1, FIG.1 (b) is the sectional drawing. Fig.2 (a) is a bottom view of the easily openable container of other one Embodiment or Example 2, FIG.2 (b) is the sectional drawing. Fig.3 (a) is explanatory drawing which shows the laminated structure of the sheet | seat for sheet forming of an Example and a comparative example, FIG.3 (b) is explanatory drawing which shows the laminated structure of the sheet | seat for lid | cover materials. 4A is a plan view of the easy-open container of Comparative Example 1, and FIG. 4B is a cross-sectional view thereof. Fig.5 (a) is a top view of the easy-open container of the comparative example 2, FIG.4 (b) is the sectional drawing.

  In the easy-open container (10) of the present invention, as shown in FIGS. 1 (a) and (b), a center-side content storage part (110) and a heat-welding flange part (120) are provided on the outer periphery thereof. Two sheet-molded container bodies (100) to be placed around are overlapped with the upper surfaces of the flange portions for heat fusion, communicated with the opening (111) of the contents storage portion, and the outer periphery of the flange portion for heat fusion to the outside An unheat-bonded portion (130) (shown by a dotted line) that does not reach the end is formed and heat-sealed, and a heat-welding flange portion is provided on the outer surface of both or one of the sheet-forming container main bodies. Forming the half-cut line (121) from the left end of the sheet to the right end through the unheated portion, and the contents on the center side as shown in FIGS. A sheet component in which a storage portion (110) and a flange portion (120) for heat fusion are provided around the outer periphery of the storage portion (110). A heat-sealable sheet-like lid (200) is superimposed on the upper surface of the heat-welding flange part of the container body (100), and communicated with the opening opening part of the contents storage part so that the heat-seal flange is on the outside. From the left end of the lower outer surface of the flange portion and / or the upper outer surface of the lid member of the sheet forming container main body, the non-heat-sealed portion (130) that does not reach the outer peripheral end of the portion is formed and heat-sealed. Some of them form a half-cut line (121) that passes over the unheat-bonded portion and reaches the right end.

  And the sheet | seat for sheet | seat shaping | molding which forms a container main body into a sheet | seat is a multilayer sheet | seat which has the thermoplastic resin layer which can be heat-seal | fused to the single-layer sheet | seat of the thermoplastic resin which can be heat-seal | fused, or a heat-seal | fusing side layer. In the multilayer sheet, barrier layers such as an ethylene-vinyl alcohol copolymer layer and a silicon oxide vapor deposition film layer are provided in the constituent layers in accordance with the intended use of the container. The container inner layer is provided with a heat-sealable thermoplastic resin layer, for example, α / β polyethylene such as polyethylene, polypropylene, polybutene, ethylene-α / β unsaturated carboxylic acid and ester. Compound resin, ethylene-vinyl acetate copolymer, ionomer, or the like, or a thermoplastic resin layer that can be heat-sealed as an ethylene copolymer resin composition layer with polyacrylonitrile or polyvinyl alcohol using these as a base resin It is.

  The lid sheet is a single-layer sheet of a thermoplastic resin that can be heat-sealed or a multilayer sheet that has a thermoplastic resin layer that can be heat-sealed to the heat-sealing side layer, depending on the intended use of the container. In the constituent layers, barrier layers such as an ethylene-vinyl alcohol copolymer layer and a silicon oxide vapor deposited film layer are provided. Moreover, a stretched nylon film layer, a stretched polyethylene terephthalate film layer, etc. are laminated | stacked in a structural layer as a printing base material layer. The container inner layer is provided with a thermoplastic resin layer capable of heat sealing (heat sealing).

  The shape of the half-cut line is not particularly limited, but is processed into a straight line or a curved line by a continuous line, a broken line, or a dotted line according to the purpose of use of the container. It is processed with a blade or a laser beam.

  Specific examples of the present invention will be described below.

<Example 1>
First, as shown in FIG. 3A, [outside of container] 300 μm thick amorphous polyethylene terephthalate layer (310) / adhesive layer (320) / 10 μm thick ethylene-vinyl alcohol copolymer layer (330) / 10 μm thick nylon layer ( 340) / 35 μm-thick linear low-density polyethylene layer (350) [inner side] sheet-forming sheet (300) is formed into a sheet, and a bottle half-shaped content storage part at the center side and heat at the outer periphery thereof A sheet-molded container body having a flange portion for fusion was prepared. Next, as shown in FIGS. 1 (a) and 1 (b), the two sheet-molded container bodies (100, 100) are overlapped with the top surfaces of the flange portions (120, 120) for heat fusion. (No shampoo preparation 15 ml) in the state where the contents storage part (110) is stored, the heat is not communicated with the opening part (111) of the contents storage part and does not reach the outer peripheral edge of the flange part for heat fusion to the outside. Fusing part (1309 is formed and heat-sealed and sealed, and non-heat-sealing from the left end of the heat-fusing flange part to the corresponding outer surface position of both heat-fusing flange parts of the sheet forming container body A half-cut line (121) passing through the part and reaching the right end was formed with a laser beam to produce an easy-open container (10) (portion pack) of Example 1. coherent Inc. pulse wave equation CO ² Za oscillator, using a scanning system manufactured by GSI · Rumonikusu Japan KK, processing conditions, the oscillator maximum output: 50W, Output: 10~50%, 750mm / sec (SS10 JS10 SP50), frequency: was 5kHz.

<Example 2>
First, as in Example 1, [outside of container] 300 μm thick amorphous polyethylene terephthalate layer / adhesive layer / 10 μm thick ethylene-vinyl alcohol copolymer layer / 10 μm thick nylon layer / 35 μm thick linear low density polyethylene layer [ The inside of the container] was formed using a sheet forming sheet, and a sheet forming container main body having a bottle half body-shaped content storage portion at the center side and a flange portion for heat fusion at the outer periphery thereof was produced. Next, as shown in FIG. 3B, [outside of the container] 15 μm thick stretched nylon layer (410) / adhesive layer (420) / 9 μm thick aluminum foil layer (430) / 20 μm thick ethylene-methacrylic acid copolymer layer (440) / 25 μm-thick linear low-density polyethylene layer (450) [inner side of the container] The cover sheet (400) is punched into a size of the outer peripheral shape of the heat-sealing flange portion of the sheet-molded container body A lid was prepared. And in the state which stored the contents (shampoo formulation 15ml) in the contents storage part, as shown to Fig.2 (a) and (b), the heat-fusing flange part (120) of a sheet forming container main body (100) A non-heat-sealed part that overlaps the top surface of the lid (200) and communicates with the opening part (111) of the contents storage part (110) and does not reach the outer peripheral end of the heat-sealing flange part. (130) is formed, heat-sealed and sealed, and a half-cut from the left end of the lower outer surface of the heat-welding flange portion of the sheet-forming container body to the right end after passing over the non-heat-sealing portion A line (121) was formed to prepare an easily openable container (10) (portion pack) of Example 2. The half cut line processing is the same as that in the first embodiment.

<Comparative Example 1>
First, a sheet forming container body is prepared by forming a sheet using a sheet forming sheet having the same configuration as in Example 1 and surrounding a bottle half-body-shaped content storage portion on the center side and a heat-sealing flange portion on the outer periphery thereof. did. Next, as shown in FIGS. 4 (a) and 4 (b), the two sheet-molded container bodies (100, 100) are overlapped with the upper surfaces of the heat-sealing flange portions (120, 120). In a state in which (shampoo preparation 15 ml) is stored in the content storage portion (110), the mating surface of the heat-sealing flange portion is heat-sealed and sealed, and the opening (111) of the content storage portion (110) is sealed. ) And the upper and lower outer surfaces including the heat-welding flange portion, the half-cut line (121) passing from the left end of the heat-welding flange portion to the right end of the heat-welding flange portion through the content storage portion , 121) was applied with a laser beam to produce an easy-open container (10) (portion pack) of Comparative Example 1. The half cut line processing is the same as that in the first embodiment.

<Comparative example 2>
First, a sheet forming container body is prepared by forming a sheet using a sheet forming sheet having the same configuration as in Example 1 and surrounding a bottle half-body-shaped content storage portion on the center side and a heat-sealing flange portion on the outer periphery thereof. did. Next, a lid material sheet having the same configuration as that of Example 2 was punched to produce a lid material having a size of the outer peripheral shape of the flange portion for heat fusion of the sheet molded container body. And in the state which stored the contents (shampoo formulation 15 ml) in the contents storage part, as shown to Fig.5 (a) and (b), the heat-fusing flange part (120) of a sheet forming container main body (100) A cover material (200) is superposed on the upper surface of the sheet, and a heat fusion flange portion is formed on the outer surface to be opened including the opening portion (111) of the content storage portion (110) of the sheet forming container body and the heat fusion flange portion. An easy-open container (10) of Comparative Example 2 (portion pack) by applying a laser beam to a half-cut line (121) that passes from the left end to the right end of the flange portion for heat fusion. ) Was produced. The half cut line processing is the same as that in the first embodiment.

<Comparison evaluation>
Next, after processing half-cut lines for four types of easy-open containers having different structures and half-cut line positions in Examples 1, 2 and Comparative Examples 1 and 2 shown in Table 1 above. The presence or absence of occurrence of pinholes, leakage at the time of dropping, and openability with a half-cut wire were comparatively evaluated. The number of each sample was 20.

４種類の易開封性容器の比較評価は、表２に示すように、実施例１及び実施例２については、ハーフカット線加工後のピンホールの発生は皆無であり、落下時の漏れの発生も確認されなかった。また、開封性も全て良好であった。一方、比較例１及び比較例２については、ハーフカット線加工後のピンホールの発生及び落下時の漏れの発生が数本確認された。また、開封性が良好なものが少なかった。

As shown in Table 2, the comparative evaluation of the four types of easy-open containers is that no occurrence of pinholes after half-cut wire processing occurred in Example 1 and Example 2, and leakage occurred when dropped Also not confirmed. Moreover, all the openability was also favorable. On the other hand, about the comparative example 1 and the comparative example 2, several generation | occurrence | production of the generation | occurrence | production of the pinhole after half-cut wire processing and the generation | occurrence | production of the leak at the time of fall were confirmed. Moreover, there were few things with favorable openability.

(A) is a top view of the easily openable container of one Embodiment or Example 1 of this invention, (b) is sectional drawing. (A) is a bottom view of the easily openable container of other one Embodiment or Example 2 of this invention, (b) is sectional drawing. (A) is explanatory drawing which shows the laminated structure of the sheet | seat for sheet forming of Examples 1 and 2 and Comparative Examples 1 and 2, (b) is explanatory drawing which shows the laminated structure of the sheet | seat for lid | cover materials. (A) is a top view of the easy-open container of the example examined conventionally or the comparative example 1, (b) is sectional drawing. (A) is a bottom view of the easily openable container of another example or the comparative example 2 considered conventionally, (b) is sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Easy-open container 100 ... Sheet-molding container main body 110 ... Container storage part 111 ... Opening part 120 ... Heat-welding flange 121 ... Half-cut wire 130 ... Unheat-sealing part 200 ... Lid 300 ... Sheet molding sheet 310 ... Amorphous polyethylene terephthalate layer 320, 420 ... Adhesive layer 330 ... Ethylene-vinyl alcohol copolymer layer 340, 410 ... Nylon layer 350, 450 ... Linear Low density polyethylene layer 430 ... Aluminum foil layer 440 ... Ethylene-methacrylic acid copolymer layer 400 ... Cover sheet

Claims (6)

  Two sheet-molded container bodies with a center-side content storage section and a heat-welding flange section on the outer periphery of the contents-stacking section are overlapped with each other and communicated with the opening of the contents storage section. Let the outer side of the flange part for heat fusion to the outside to form the non-heat fusion part that does not reach the outer peripheral end, and heat fusion, and on the outer surface of both or one of the heat fusion flange parts of the sheet molding container body, An easily openable container characterized by forming a half-cut line from the left end of the heat-welding flange portion over the non-heat-bonded portion to the right end.   The easily openable container according to claim 1, wherein the sheet-molded container body is formed by sheet-molding a single-layer sheet of a thermoplastic resin that can be heat-sealed.   The easily openable container according to claim 1, wherein the sheet-molded container body is formed by sheet-molding a multilayer sheet having a thermoplastic resin layer that can be thermally fused to the heat-sealing side layer.   A heat-weldable cover material is overlaid on the upper surface of the heat-welding flange portion of the sheet-molded container main body that surrounds the center-side content storage portion and the heat-welding flange portion on the outer periphery thereof. The lower outer surface of the flange part for heat fusion of the sheet molding container main body is heat-sealed by forming a non-heat-fusion part that communicates with the opening part and does not reach the outer peripheral edge of the flange part for heat-fusing to the outside. And / or the easily openable container which formed the half cut line which passes on the non-heat-fusion part from the left end of the upper outer surface of a cover material, and reaches the right end.   The easily openable container according to claim 4, wherein the sheet-molded container body is formed by sheet-molding a single-layer sheet of a thermoplastic resin that can be heat-sealed.   The easily-openable container according to claim 4, wherein the sheet-molded container body is formed by sheet-molding a multilayer sheet having a thermoplastic resin layer capable of being thermally fused to the heat-sealing side layer.

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