JP6325196B2 - Fusion bonding structure of resin film and method of forming fusion bonding structure of resin film - Google Patents
Fusion bonding structure of resin film and method of forming fusion bonding structure of resin film Download PDFInfo
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- JP6325196B2 JP6325196B2 JP2013065606A JP2013065606A JP6325196B2 JP 6325196 B2 JP6325196 B2 JP 6325196B2 JP 2013065606 A JP2013065606 A JP 2013065606A JP 2013065606 A JP2013065606 A JP 2013065606A JP 6325196 B2 JP6325196 B2 JP 6325196B2
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- 239000011347 resin Substances 0.000 title claims description 119
- 229920005989 resin Polymers 0.000 title claims description 119
- 230000004927 fusion Effects 0.000 title claims description 76
- 238000000034 method Methods 0.000 title claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 description 15
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 239000000155 melt Substances 0.000 description 9
- 230000008602 contraction Effects 0.000 description 7
- 238000005304 joining Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Lining Or Joining Of Plastics Or The Like (AREA)
- Cell Separators (AREA)
Description
本発明は樹脂フィルムの融着接合構造に関し、特に融着により袋状に成型し、内部にシート状の構造体を収納する樹脂フィルムの融着接合構造、及び樹脂フィルムの融着接合構造形成方法に関する。 TECHNICAL FIELD The present invention relates to a resin film fusion-bonding structure, and in particular, a resin film fusion-bonding structure in which a sheet-like structure is housed by molding into a bag shape by fusion, and a resin film fusion-bonding structure forming method About.
薄いシート状の構造体を格納するために、樹脂フィルムを袋状に成型し、それらを合わせてユニットとする場合がある。この場合に用いる樹脂フィルムに、ポリプロピレンやポリエチレンなどの高分子材料からなる多孔性フィルムを使用することがある。ここで、樹脂フィルムの製造時の延伸方向を「流れ方向(MD：Machine Direction、以降MDと記載)」、樹脂フィルムの幅方向を「垂直方向(TD：Transverse Direction、以降TDと記載)」とすると、MDとTDは一般に熱収縮率が異なる。このように、樹脂フィルムの熱収縮率が方向性を有しているのが一般的である。例えば、市販されているポリプロピレン製の製品の一例をあげると、熱収縮率がMD：<5.0%、TD：0.0%となっている。 In order to store a thin sheet-like structure, a resin film may be molded into a bag shape and combined to form a unit. The resin film used in this case may be a porous film made of a polymer material such as polypropylene or polyethylene. Here, the stretching direction during the production of the resin film is “flow direction (MD: Machine Direction, hereinafter referred to as MD)”, and the width direction of the resin film is “vertical direction (TD: Transverse Direction, hereinafter referred to as TD)”. Then, MD and TD generally have different heat shrinkage rates. As described above, the heat shrinkage rate of the resin film is generally directional. For example, as an example of a commercially available product made of polypropylene, the heat shrinkage ratio is MD: <5.0%, TD: 0.0%.
また、樹脂フィルムを袋状とするため、重ねた樹脂フィルムの周囲を融着する必要がある。融着方法の例として、融着時の樹脂フィルム、シート状構造体及び加熱ツールの位置関係を図１３に示す。樹脂フィルム２ａ，２ｂ同士が重なっている融着代７を加熱ツール５とステージ６で挟み込むように加熱し、格納するシート状構造体１周りの樹脂フィルム２ａ、２ｂを接合し、シート状構造体１を包む袋状の樹脂フィルムを形成する。 Moreover, in order to make a resin film into a bag shape, it is necessary to fuse | melt the circumference | surroundings of the laminated | stacked resin film. As an example of the fusing method, FIG. 13 shows the positional relationship between the resin film, the sheet-like structure, and the heating tool during fusing. The fusion allowance 7 where the resin films 2a and 2b overlap each other is heated so as to be sandwiched between the heating tool 5 and the stage 6, and the resin films 2a and 2b around the sheet-like structure 1 to be stored are joined. 1 to form a bag-like resin film.
このような袋状の樹脂フィルムの一例が、特許文献１に記載されている。 An example of such a bag-shaped resin film is described in Patent Document 1.
上述のように、熱収縮率が樹脂フィルム内の方向によって異なるということは、加熱ツール５により直接加熱される融着部の縮む方向に片寄りが生じるということである。樹脂フィルムの熱収縮方向に対する加熱の位置、融着部の形状によっては、融着部が縮みにより変形し、融着部の品質を劣化させることに繋がる可能性がある。 As described above, the fact that the thermal shrinkage rate varies depending on the direction in the resin film means that a deviation occurs in the shrinking direction of the fused portion directly heated by the heating tool 5. Depending on the position of heating in the heat shrink direction of the resin film and the shape of the fused part, the fused part may be deformed due to shrinkage, leading to deterioration of the quality of the fused part.
特許文献１には、図１４のように、融着部３の端部が樹脂フィルム２の外縁に接している融着形状が示されている。図１５に示すように、融着部３の端部が樹脂フィルム２の外縁に接している融着形状で、熱収縮率が大きい方向(図１５中はMD)と融着部３の長手方向が一致している場合、実証実験により融着部３が外縁から内側に溶け込む現象が発生する可能性が示唆されている。融着部３が溶け込むと、融着部３の面積を減少することから、融着部３の強度が低下するなどの問題が起こる。 Patent Document 1 shows a fusion shape in which the end of the fusion part 3 is in contact with the outer edge of the resin film 2 as shown in FIG. 14. As shown in FIG. 15, the end of the fusion part 3 is in a fusion shape in contact with the outer edge of the resin film 2, and the direction in which the heat shrinkage is large (MD in FIG. 15) and the longitudinal direction of the fusion part 3. In the case where the two coincide, it is suggested by the demonstration experiment that a phenomenon may occur in which the fused portion 3 melts inward from the outer edge. When the fused part 3 is melted, the area of the fused part 3 is reduced, and thus problems such as a decrease in strength of the fused part 3 occur.
このように、特許文献１には樹脂フィルムの熱収縮率の異方性に対して加熱方法、融着部３の形状を工夫した記述はされておらず、前述の融着部３の変形による品質劣化する課題が内在している。 As described above, Patent Document 1 does not describe a method for devising the heating method and the shape of the fused portion 3 with respect to the anisotropy of the thermal contraction rate of the resin film. The problem of quality deterioration is inherent.
本発明の目的は、上述した課題を解決し、融着部の変形による品質劣化を低減する樹脂フィルムの融着接合構造及び融着接合構造形成方法を提供することにある。 An object of the present invention is to solve the above-described problems and provide a resin film fusion-bonding structure and a fusion-bonding structure forming method that reduce quality deterioration due to deformation of a fusion part.
本発明の樹脂フィルムの融着接合構造は、１枚を折りたたんだまたは２枚の樹脂フィルムの、周辺部を融着することにより形成され、前記周辺部は、融着部と、非融着部が交互に連なるように融着され、かつ前記融着部は、前記樹脂フィルムの外縁を含まない位置に形成され、かつ長軸方向と短軸方向を有する形状であり、前記長軸方向は、同一方向に向かって配列しており、前記同一方向は、前記樹脂フィルムの直交する２方向のうち、熱収縮率がより小さい方向であり、前記周辺部を融着することによって袋状に成型された内部に、シート状構造体が配置される。 The resin film fusion-bonding structure of the present invention is formed by folding one sheet or two sheets of resin film and fusing the peripheral part, and the peripheral part includes a fused part and a non-fused part. Are fused so that they are alternately connected, and the fused part is formed at a position not including the outer edge of the resin film and has a major axis direction and a minor axis direction, and the major axis direction is Arranged in the same direction, the same direction is a direction having a smaller thermal shrinkage rate among two orthogonal directions of the resin film, and is molded into a bag shape by fusing the peripheral part. In addition, a sheet-like structure is disposed inside.
また、本発明の樹脂フィルムの融着接合構造形成方法は、１枚を折りたたんだまたは２枚の樹脂フィルムの内部に、シート状構造体を配置する工程と、前記樹脂フィルムの周辺部を融着する工程と、を有し、前記周辺部に形成された融着部は、融着部と、非融着部が交互に連なるように形成され、前記融着部は、前記方形の樹脂フィルムの外縁を含まない位置に形成され、かつ長軸方向と短軸方向を有する形状であり、前記長軸方向は、同一方向に向かって配列しており、前記同一方向は、前記樹脂フィルムの直交する２方向のうち、熱収縮率がより小さい方向である。 In addition, the method for forming a fusion bonded structure of resin films according to the present invention includes a step of arranging a sheet-like structure inside one folded or two resin films, and fusing a peripheral portion of the resin film. A fusion part formed on the peripheral part is formed so that a fusion part and a non-fusion part are alternately connected, and the fusion part is formed of the rectangular resin film. It is formed in a position that does not include an outer edge and has a major axis direction and a minor axis direction. The major axis direction is arranged in the same direction, and the same direction is orthogonal to the resin film. Of the two directions, the heat shrinkage rate is smaller.
本発明の樹脂フィルムの融着接合構造は、融着部の変形に起因した品質劣化による、融着部の強度の低下を低減し、さらに、外縁を含むように融着部を設けた場合の外縁から内側に溶け込む現象を無くし、融着部の強度の低下を低減することができる。 The fusion bonded structure of the resin film of the present invention reduces the decrease in the strength of the fused part due to quality deterioration due to deformation of the fused part, and further, when the fused part is provided so as to include the outer edge It is possible to eliminate the phenomenon of melting from the outer edge to the inside, and to reduce the decrease in the strength of the fused portion.
［第一の実施形態］以下に、本発明を実施するために好ましい形態について図面を用いて説明する。ただし、以下に述べる実施形態には、本発明を実施するために技術的に好ましい限定がされているが、発明の範囲を以下に限定するものではない。 [First Embodiment] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. However, the preferred embodiments described below are technically preferable for carrying out the present invention, but the scope of the invention is not limited to the following.
[構成の説明]図１（ａ）は、本実施形態における樹脂フィルムの融着接合構造を備える樹脂フィルムと、内包されるシート状構造体の上面図である。 [Description of Configuration] FIG. 1A is a top view of a resin film having a resin film fusion-bonding structure in this embodiment and a sheet-like structure included therein.
図１（ａ）に示すように、本実施形態における樹脂フィルム２の融着接合構造は、２枚の樹脂フィルム２の周辺部に形成され、融着部３と、非融着部４を有する。袋状に成型された樹脂フィルム２は、シート状構造体１を内包する。シート状構造体１からは、樹脂フィルム２の外側に端子１aが引きだされている。なお、樹脂フィルム２の形状は長方形とした。 As shown in FIG. 1A, the fusion bonding structure of the resin film 2 in the present embodiment is formed in the peripheral part of the two resin films 2 and has a fusion part 3 and a non-fusion part 4. . The resin film 2 molded into a bag shape encloses the sheet-like structure 1. A terminal 1 a is drawn from the sheet-like structure 1 to the outside of the resin film 2. The shape of the resin film 2 was a rectangle.
シート状構造体１は、その両面を樹脂フィルム２に覆われており、さらに、樹脂フィルム２外に引きだされる端子１aを有する。シート状構造体１の周囲を囲むように、樹脂フィルム２の周辺部のうち少なくとも三辺が融着部３によって接合されている。ここで三辺とは、シート状構造体１の四辺のうち、端子１aが引きだされている一辺を除いた三辺を指す。このようにシート状構造体１は、袋状に成型された樹脂フィルム２に内包されるため、樹脂フィルム２の外側に容易に脱落しない。 The sheet-like structure 1 is covered with a resin film 2 on both sides, and further has a terminal 1 a drawn out of the resin film 2. At least three sides of the peripheral part of the resin film 2 are joined by the fusion part 3 so as to surround the periphery of the sheet-like structure 1. Here, the three sides refer to three sides of the four sides of the sheet-like structure 1 excluding one side from which the terminal 1a is drawn. Thus, since the sheet-like structure 1 is included in the resin film 2 molded in a bag shape, it does not easily fall off the outside of the resin film 2.
樹脂フィルム２は、端子１aが樹脂フィルム２の外側に引きだされている領域を含む一辺を除き、樹脂フィルム上面側２aと樹脂フィルム下面側２b（図１（ｂ）参照）によって内包するシート状構造体１の周辺部のうち少なくとも三辺に融着部３と非融着部４を交互に配置している。図１（ｃ）のように、端子１ａが引きだされている領域以外の、樹脂フィルム２の周辺部に融着部３と非融着部４を交互に配置してもいい。樹脂フィルム２は２枚用いてシート状構造体１を内包するだけでなく、１枚の樹脂フィルム２を２つに折りたたみ、その内部にシート状構造体１を内包するようにしてもよい。この場合、図２に示すように折り返し部８に融着部３を設けなくてもよい。樹脂フィルム２には、ポリプロピレンやポリエチレンなどの高分子材料からなる多孔性フィルムが使用される。樹脂フィルム２は、その製造時の延伸方向であるMDと、MDと直交しフィルムの幅方向であるTDの２方向を有する。MDとTDの熱収縮率が異なるのが一般的である。また、樹脂フィルム２の形状は方形でなくてもよく、シート状構造体１を内包し、シート状構造体１を取り囲む周辺部に融着部３と非融着部４を交互に配置できればよい。 The resin film 2 is a sheet that is encapsulated by the resin film upper surface side 2a and the resin film lower surface side 2b (see FIG. 1B) except for one side including the region where the terminal 1a is drawn to the outside of the resin film 2. The fused portions 3 and the non-fused portions 4 are alternately arranged on at least three sides of the peripheral portion of the structure 1. As shown in FIG. 1C, the fused portions 3 and the non-fused portions 4 may be alternately arranged in the peripheral portion of the resin film 2 other than the region where the terminals 1a are drawn. The two resin films 2 may be used not only to enclose the sheet-like structure 1 but also to fold one resin film 2 into two and enclose the sheet-like structure 1 therein. In this case, as shown in FIG. 2, the fusion part 3 may not be provided in the folded part 8. As the resin film 2, a porous film made of a polymer material such as polypropylene or polyethylene is used. The resin film 2 has two directions of MD, which is the stretching direction at the time of manufacture, and TD, which is orthogonal to the MD and is the width direction of the film. In general, MD and TD have different heat shrinkage rates. Further, the shape of the resin film 2 may not be a square, and it is sufficient that the fused portion 3 and the non-fused portion 4 can be alternately arranged in a peripheral portion that encloses the sheet-like structure 1 and surrounds the sheet-like structure 1. .
融着部３は、樹脂フィルム２において、シート状構造体１の周囲に位置する周辺部の少なくとも三辺の辺上に形成される。融着部３と非融着部４は交互に連なるように形成され、かつ樹脂フィルム２の外縁を含まない位置に形成される。融着部３の形状は、長軸方向と短軸方向を有する形状であればよい。例えば、図１（ａ）に示す略長方形、他には略楕円形、略角丸長方形（陸上競技のトラックの形状）などが挙げられる。融着部３の形状が略長方形の場合は長辺方向、略楕円形であるときは長軸方向が、同一方向に向かって配列している。前記同一方向とは、MDとTDのうち、熱収縮率が小さい方向である。本実施形態の場合は、TDが熱収縮率の小さな方向であり、端子１ａを取り出す方向と一致している。樹脂フィルム２のMDが端子１ａの取り出し向きと同一の場合は、融着部３の長辺方向、もしくは長軸方向を図２のようにTDに向けて配置すると、同様の効果が得られる。また、融着部３は長軸方向が長ければよい。例えば図３のように、長軸と短軸の比が異なる融着部３を混在させてもよい。 The fused part 3 is formed on at least three sides of the peripheral part located around the sheet-like structure 1 in the resin film 2. The fused portions 3 and the non-fused portions 4 are formed so as to be alternately arranged, and are formed at positions that do not include the outer edge of the resin film 2. The shape of the fusion | melting part 3 should just be a shape which has a major axis direction and a minor-axis direction. For example, a substantially rectangular shape shown in FIG. 1 (a), a substantially elliptical shape, a substantially rounded rectangular shape (track shape of track and field), and the like can be given. When the shape of the fused part 3 is substantially rectangular, the long side direction is arranged, and when it is substantially elliptical, the long axis direction is arranged in the same direction. The same direction is a direction in which MD and TD have a small thermal shrinkage rate. In the case of this embodiment, TD is the direction in which the thermal contraction rate is small, and coincides with the direction in which the terminal 1a is taken out. When the MD of the resin film 2 is the same as the direction in which the terminal 1a is taken out, the same effect can be obtained by arranging the long side direction or the long axis direction of the fused portion 3 toward the TD as shown in FIG. Moreover, the fusion | fusion part 3 should just have a long-axis direction. For example, as shown in FIG. 3, fusion parts 3 having different ratios of the major axis and the minor axis may be mixed.
図１〜図３では、略方形のシート状構造体１の一端の一部が端子１ａとして樹脂フィルム２の外側に引きだされている形状を例として挙げた。さらに、図４及び図５のように略方形のシート状構造体１の一端のすべてが端子１ａとして引きだされている形状においても、本実施形態における発明を適用することが可能である。 In FIGS. 1 to 3, a shape in which a part of one end of the substantially square sheet-like structure 1 is drawn out to the outside of the resin film 2 as a terminal 1 a is given as an example. Furthermore, the invention in this embodiment can also be applied to a shape in which all one ends of the substantially rectangular sheet-like structure 1 are drawn out as terminals 1a as shown in FIGS.
≪融着接合構造の形成工程≫本実施形態における発明の融着接合構造の形成工程は、記述の融着部３を形成するものである。 << Formation Process of Fusion Bonding Structure >> The fusion bonding structure formation process of the present invention in this embodiment is to form the described fusion part 3.
樹脂フィルム２を袋状とするため、重ねたもしくは折りたたんだ樹脂フィルム２の周辺部を融着する必要がある。ここでは一例として熱圧着で融着部３を形成する工程を示す。融着時の樹脂フィルム２、シート状構造体１及び加熱ツール５の位置関係を図６に示す。まず、２枚の樹脂フィルム２を重ねた、もしくは１枚の樹脂フィルム２を折りたたんだものの内部に、あらかじめ用意されたシート状構造体１を配置する。ここで図６に示したように、重ねたもしくは折りたたんだ樹脂フィルム２の周辺部には、樹脂フィルム２同士が対向する融着代７がある。すなわち、内包されるシート状構造体１は、融着代７より内側の領域に配置できる大きさに設計されている。次に、この融着代７を加熱ツール５とステージ６で挟み込むように加熱し、シート状構造体１周りの樹脂フィルム２同士を接合する。接合の際、周辺部の少なくとも三辺の辺上に融着部３を形成することで、シート状構造体１を内包する袋状の樹脂フィルム２を形成する。 In order to make the resin film 2 into a bag shape, it is necessary to fuse the peripheral portion of the overlapped or folded resin film 2. Here, as an example, a process of forming the fused portion 3 by thermocompression bonding is shown. The positional relationship among the resin film 2, the sheet-like structure 1, and the heating tool 5 at the time of fusion is shown in FIG. First, a sheet-like structure 1 prepared in advance is placed inside a laminate of two resin films 2 or a single resin film 2 folded. Here, as shown in FIG. 6, there is a fusion allowance 7 where the resin films 2 face each other in the peripheral portion of the overlapped or folded resin film 2. That is, the encapsulated sheet-like structure 1 is designed to have a size that can be disposed in a region inside the fusion allowance 7. Next, the fusion allowance 7 is heated so as to be sandwiched between the heating tool 5 and the stage 6, and the resin films 2 around the sheet-like structure 1 are joined together. At the time of joining, the bag-shaped resin film 2 that encloses the sheet-like structure 1 is formed by forming the fused part 3 on at least three sides of the peripheral part.
融着部３は、加熱ツール５によって、融着部３と、非融着部４が交互に連なるように形成する。さらに、前記方形の樹脂フィルム２の外縁を含まない位置に形成する。 The fusion part 3 is formed by the heating tool 5 so that the fusion part 3 and the non-fusion part 4 are alternately connected. Further, the rectangular resin film 2 is formed at a position not including the outer edge.
融着部３の形成は、先述の熱圧着だけでなく、超音波融着、熱融着などの他の溶接方法によって行うことも可能である。 The fusion part 3 can be formed not only by the above-described thermocompression bonding but also by other welding methods such as ultrasonic fusion and thermal fusion.
融着部３を形成する際、融着部３の形状の長軸方向が同一方向に向くように、予め加熱ツール５を調節する。ここで同一方向とは、樹脂フィルム２における２方向、MDとTDのうち、熱収縮率が小さい方向である。加熱された後の融着部３を上から見た形状を図８に、断面形状を図９に示す。 When the fusion part 3 is formed, the heating tool 5 is adjusted in advance so that the major axis direction of the shape of the fusion part 3 is in the same direction. Here, the same direction is a direction in which the thermal shrinkage rate is small among the two directions in the resin film 2, MD and TD. FIG. 8 shows a shape of the fused part 3 after being heated as viewed from above, and FIG. 9 shows a cross-sectional shape thereof.
本形成工程は一例であり、発明の範囲を限定するものではない。他の工程により製造した場合でも、製造物が本発明に係る構成を有すればその効果を得ることができる。 This formation process is an example and does not limit the scope of the invention. Even when manufactured by other steps, the effect can be obtained if the product has the configuration according to the present invention.
[効果の説明]本実施形態の効果について説明する。本実施形態における融着接合構造は、樹脂フィルム２を接合する際に、融着部３の長辺もしくは長軸方向を、MDとTDのうち樹脂フィルム２の熱収縮率が小さい方向に向かって配列させたものである。加えて、融着部３を、樹脂フィルム２の外縁を含まない位置に設けたものである。 [Explanation of Effects] The effects of this embodiment will be described. In the fusion bonding structure in the present embodiment, when bonding the resin film 2, the long side or the long axis direction of the fusion bonding portion 3 is directed toward the direction in which the thermal contraction rate of the resin film 2 is small between MD and TD. Arranged. In addition, the fusion part 3 is provided at a position not including the outer edge of the resin film 2.
上記構成により、熱収縮率の大きい方向に融着部３の長辺もしくは長軸方向を向けた場合に起こる、融着部３の変形に起因した品質劣化による融着部３の強度の低下を低減することができる。さらに、外縁を含むように融着部３を設けた場合の外縁から内側に溶け込む現象を無くし、融着部３の面積を保持でき、融着部３の強度の低下を低減することができる。 With the above configuration, the strength of the fused part 3 is reduced due to the quality deterioration caused by the deformation of the fused part 3 that occurs when the long side or the long axis direction of the fused part 3 is directed in the direction in which the thermal contraction rate is large. Can be reduced. Furthermore, when the fusion part 3 is provided so as to include the outer edge, the phenomenon of melting inward from the outer edge can be eliminated, the area of the fusion part 3 can be maintained, and a decrease in strength of the fusion part 3 can be reduced.
樹脂フィルム２の外縁より内側に融着部３がある融着形状の例として、特許３３８０９３５号がある。その融着形状を、図１０に示す。このように熱収縮率が大きい方向(図１１中はMD)と融着部３の長手方向が一致している場合、図１２に示すような溶け溜まり３’が発生する。この溶け溜まり３’が、加熱時の温度条件によっては加熱ツール５側に付着して、加熱ツール５の上昇とともに糸引き現象を起こすことが、実証実験により判明している。融着部３に糸引きがあると、樹脂フィルム２、もしくはシート状構造体１と樹脂フィルム２とのユニットを後工程に回した際などに糸くず等が問題になる場合がある。 Japanese Patent No. 3380935 is an example of a fusion shape in which the fusion part 3 is located inside the outer edge of the resin film 2. The fused shape is shown in FIG. Thus, when the direction in which the thermal contraction rate is large (MD in FIG. 11) and the longitudinal direction of the fused portion 3 coincide with each other, a melt pool 3 'as shown in FIG. 12 occurs. It has been proved by a demonstration experiment that the melt pool 3 ′ adheres to the heating tool 5 side depending on the temperature condition at the time of heating and causes a string drawing phenomenon as the heating tool 5 rises. If there is stringing at the fused portion 3, there is a case where thread waste or the like becomes a problem when the resin film 2 or the unit of the sheet-like structure 1 and the resin film 2 is turned to a subsequent process.
本実施形態により、熱収縮率の大きい方向に融着部３の長辺もしくは長軸方向を向けた場合に起こる、融着時の融着部３に生じる糸引きを低減できる。
[他の実施形態]第一、第二の実施形態では樹脂フィルム２は長方形としたが、正方形でもよいし、それらの角を丸くした形状などでもよい。
According to this embodiment, it is possible to reduce stringing that occurs in the fused portion 3 at the time of fusion, which occurs when the long side or the long axis direction of the fused portion 3 is directed in the direction in which the thermal contraction rate is large.
[Other Embodiments] In the first and second embodiments, the resin film 2 is rectangular. However, the resin film 2 may be square or may have a shape with rounded corners.
１ シート状構造体
１ａ 端子
２ 樹脂フィルム
２ａ 樹脂フィルム上面側
２ｂ 樹脂フィルム下面側
３ 融着部
３’ 融着部の溶け溜まり
４ 非融着部
５ 加熱ツール
６ ステージ
７ 融着代
８ 折り返し部
DESCRIPTION OF SYMBOLS 1 Sheet-like structure 1a Terminal 2 Resin film 2a Resin film upper surface side 2b Resin film lower surface side 3 Fusion part 3 'Fusion | melting pool of a fusion part 4 Non-fusion part 5 Heating tool 6 Stage 7 Fusion margin 8 Folding part
Claims (5)
前記周辺部は、融着部と、非融着部が交互に連なるように融着され、かつ
前記融着部は、前記樹脂フィルムの外縁を含まない位置に形成され、かつ長辺方向と短辺方向または長軸方向と短軸方向を有する形状であり、
前記長辺方向または長軸方向は、同一方向に向かって配列しており、
前記同一方向は、前記樹脂フィルムの直交する２方向のうち、熱収縮率がより小さい方向であり、
前記熱収縮率が大きい方向と小さい方向が、前記１枚を折りたたんだ樹脂フィルムの折辺同士ないし前記２枚の樹脂フィルム同士で同一となるようにし、
前記周辺部を融着することによって袋状に成型された内部に、シート状構造体が配置されることを特徴とする樹脂フィルムの融着接合構造。 Of a certain direction and the resin film of the folded or two sheets of one of the thermal shrinkage ratio in a direction perpendicular thereto are different resin film is formed by fusing the peripheral portion,
The peripheral portion is fused so that fused portions and non-fused portions are alternately connected, and the fused portion is formed at a position not including the outer edge of the resin film, and has a long side direction and a short side direction. A shape having a side direction or a major axis direction and a minor axis direction,
The long side direction or the long axis direction is arranged in the same direction,
The same direction is a direction having a smaller heat shrinkage ratio among the two orthogonal directions of the resin film,
The direction in which the heat shrinkage rate is large and the direction in which the heat shrinkage rate is small are the same between the fold sides of the resin film in which the one sheet is folded or between the two resin films,
A resin film fusion-bonding structure, wherein a sheet-like structure is disposed inside a bag-like shape formed by fusing the peripheral portion.
前記樹脂フィルムの周辺部を融着する工程と、を有し、
前記周辺部に形成された融着部は、融着部と、非融着部が交互に連なるように形成され、
前記融着部は、前記方形の樹脂フィルムの外縁を含まない位置に形成され、かつ長辺方向と短辺方向または長軸方向と短軸方向を有する形状であり、
前記長辺方向または長軸方向は、同一方向に向かって配列しており、
前記同一方向は、前記樹脂フィルムの直交する２方向のうち、熱収縮率がより小さい方向であり、
前記熱収縮率が大きい方向と小さい方向が、前記１枚を折りたたんだ樹脂フィルムの折辺同士ないし前記２枚の樹脂フィルム同士で同一となるようにして、前記樹脂フィルムの折辺同士または前記２枚の樹脂フィルム同士を融着することを特徴とする、樹脂フィルムの融着接合構造形成方法。 A step of folding a sheet of resin film having a different thermal shrinkage rate in a certain direction and a direction perpendicular thereto , or placing a sheet-like structure inside two resin films;
Fusing the peripheral part of the resin film,
The fusion part formed in the peripheral part is formed so that the fusion part and the non-fusion part are alternately connected,
The fused portion is formed at a position not including the outer edge of the rectangular resin film, and has a shape having a long side direction and a short side direction or a long axis direction and a short axis direction,
The long side direction or the long axis direction is arranged in the same direction,
The same direction, of the two orthogonal directions of the resin film, thermal shrinkage Ri smaller direction der,
The direction in which the heat shrinkage rate is large and the direction in which the heat shrinkage rate is small are the same between the folded sides of the resin film folded from the one sheet or between the two resin films, or between the folded sides of the resin film or the 2 A method for forming a fusion bonded structure of resin films, comprising fusing two resin films together .
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