JP5433140B2 - Punching method for composite sheet member - Google Patents
Punching method for composite sheet member Download PDFInfo
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- JP5433140B2 JP5433140B2 JP2007185983A JP2007185983A JP5433140B2 JP 5433140 B2 JP5433140 B2 JP 5433140B2 JP 2007185983 A JP2007185983 A JP 2007185983A JP 2007185983 A JP2007185983 A JP 2007185983A JP 5433140 B2 JP5433140 B2 JP 5433140B2
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Description
本発明は複合シート部材の打ち抜き方法に関するものであり、特に、フレキシブルプリント配線板（以下ＦＰＣという）をキャリアに貼り合わせるときに使用される粘着剤シートなど、粘着剤層を有する複合シート部材をパンチで打ち抜く方法に関するものである。 The present invention relates to a method for punching a composite sheet member, and particularly punches a composite sheet member having an adhesive layer such as an adhesive sheet used when a flexible printed wiring board (hereinafter referred to as FPC) is bonded to a carrier. It is related to the method of punching out.
ＦＰＣを納品する場合、所要形状に打ち抜いた粘着剤を個々のＦＰＣに貼り合わせ、これら複数枚のＦＰＣをＰＥＴ（Polyethylene Terephthalate）フィルムなどのキャリアシートに整列させて貼り付ける。前記粘着剤は、フィルム基材に粘着剤成分が塗布され、さらにリリースシートが貼り合わされた３層構造からなる複合シート部材となっている。 When the FPC is delivered, an adhesive punched into a required shape is bonded to each FPC, and the plurality of FPCs are aligned and bonded to a carrier sheet such as a PET (Polyethylene Terephthalate) film. The pressure-sensitive adhesive is a composite sheet member having a three-layer structure in which a pressure-sensitive adhesive component is applied to a film substrate and a release sheet is further bonded.
図６は粘着剤層を有する複合シート部材１０の使用工程を示し、図６(1)に示すように、ＰＥＴなどからなるフィルム基材１１の一方の面に、例えばアクリル系樹脂の粘着剤を塗布して粘着剤層１２を形成し、さらに、粘着剤層１２にクラフト紙などからなるリリースシート１３を貼り合わせて、複合シート部材１０が構成されている。 FIG. 6 shows a process of using the composite sheet member 10 having an adhesive layer. As shown in FIG. 6 (1), for example, an acrylic resin adhesive is applied to one surface of a film substrate 11 made of PET or the like. The composite sheet member 10 is configured by applying the adhesive layer 12 by coating and then bonding a release sheet 13 made of kraft paper or the like to the adhesive layer 12.
次に、パンチにより所要形状に打ち抜くが、図６(2)に示すように、打ち抜き時の撓みを抑制するために、複合シート部材１０を上下反転して、厚い部材を下側（ダイス側）にする。クラフト紙は打ち抜き性が良いのでリリースシート１３に使用する。 Next, a punch is punched into a required shape. As shown in FIG. 6 (2), the composite sheet member 10 is turned upside down in order to suppress bending at the time of punching, and the thick member is placed on the lower side (die side). To. Kraft paper is used for the release sheet 13 because it has good punchability.
パンチで打ち抜いた後は、図６(3)に示すように、粘着剤層１２からリリースシート１３を剥がして除去する。そして、図６(4)に示すように、一方の面が露出した粘着剤層１２にＦＰＣ１４を位置決めして貼り合せる。 After punching with a punch, the release sheet 13 is peeled off from the adhesive layer 12 and removed as shown in FIG. Then, as shown in FIG. 6 (4), the FPC 14 is positioned and bonded to the adhesive layer 12 with one surface exposed.
さらに、図６(5)に示すように、フィルム基材１１を除去して粘着剤層１２の他方の面を露出させ、ＰＥＴフィルムなどからなるキャリアシート１５へ粘着剤層１２を介してＦＰＣ１４を所定位置に貼り付ける。このように、複数枚のＦＰＣ１４をキャリアシートに整列させて貼り付けた構成は特許文献１に記載されている。 Further, as shown in FIG. 6 (5), the film base 11 is removed to expose the other surface of the pressure-sensitive adhesive layer 12, and the FPC 14 is attached to the carrier sheet 15 made of PET film or the like via the pressure-sensitive adhesive layer 12. Paste in place. A configuration in which a plurality of FPCs 14 are aligned and pasted on a carrier sheet is described in Patent Document 1.
ここで、図７〜図１１にしたがって、前記複合シート部材１０をパンチで打ち抜く工程について説明する。図７に示すように、パンチ２０とダイス２１との間には、打ち抜かれる部材の材質や厚みに応じて所定のクリアランスＣを設けてある。複合シート部材１０の上方には、パンチ２０の動きに連動して下降するストリッププレート２３が配置されている。なお、この説明では、リリースシート１３を下側（ダイス側）にして打ち抜くものとする。 Here, the process of punching out the composite sheet member 10 with a punch will be described with reference to FIGS. As shown in FIG. 7, a predetermined clearance C is provided between the punch 20 and the die 21 according to the material and thickness of the member to be punched. Above the composite sheet member 10 is disposed a strip plate 23 that descends in conjunction with the movement of the punch 20. In this description, it is assumed that the release sheet 13 is punched with the lower side (die side).
図８に示すように、パンチ２０の下降が始まって複合シート部材１０を押圧すると、打ち抜き境界部分Ｂ１で粘着剤層１２が押しつぶされる。押された粘着剤は打ち抜かれる部分Ｂ２に集まり、上部のフィルム基材１１と下部のリリースシート１３に挟まれて加圧状態となる。 As shown in FIG. 8, when the lowering of the punch 20 starts and the composite sheet member 10 is pressed, the adhesive layer 12 is crushed at the punching boundary portion B1. The pressed adhesive gathers in the part B2 to be punched out and is sandwiched between the upper film base 11 and the lower release sheet 13 to be in a pressurized state.
図９に示すように、パンチ２０がさらに下降して複合シート部材１０のリリースシート１３およびフィルム基材１１の両方が裁断されると、加圧されていた粘着剤が裁断部分からダイス２１の孔壁面Ｂ３に染み出す。 As shown in FIG. 9, when the punch 20 is further lowered and both the release sheet 13 and the film substrate 11 of the composite sheet member 10 are cut, the pressure-sensitive adhesive is removed from the cut portion to the hole of the die 21. The wall B3 oozes out.
図１０に示すように、パンチ２０が上昇を始めると、染み出した粘着剤２２が引き上げられて、ダイス２１の孔壁面および複合シート部材１０の開口側面Ｂ４に付着してバリ状に固まる。また、打ち抜かれた粘着剤層１２の裁断口Ｂ５からも粘着剤２２が染み出てくる。 As shown in FIG. 10, when the punch 20 starts to rise, the oozed adhesive 22 is pulled up and adheres to the hole wall surface of the die 21 and the opening side surface B4 of the composite sheet member 10 and hardens in a burr shape. Further, the adhesive 22 also oozes out from the cut opening B5 of the punched adhesive layer 12.
図１１に示すように、複合シート部材１０の搬送の際に、前記染み出した粘着剤２２の一部が複合シート部材１０の下面Ｂ６にも付着し、さらに搬送工程で他物にも粘着剤２２が転写する。 As shown in FIG. 11, when the composite sheet member 10 is transported, a part of the sticking adhesive 22 adheres to the lower surface B6 of the composite sheet member 10, and further the adhesive is applied to other materials in the transport process. 22 is transferred.
図１２は複合シート部材のパンチ打ち抜き部分に粘着剤が染み出した状態を示す写真であり、この粘着剤の染み出し（バリ）がＦＰＣの部品実装端子に付着すると、部品との接続信頼性が損なわれる重大な欠陥となる。また、図１３は粘着剤の染み出し（バリ）がパンチ型のダイスに付着した状態を示す写真であり、この状態で長尺の複合シート部材を連続して打ち抜くと、複合シート部材の送りに支承をきたし、打ち抜き位置精度が悪くなるという不具合がある。 FIG. 12 is a photograph showing a state in which the adhesive oozes out to the punched-out portion of the composite sheet member. When this adhesive oozes out (burr) adheres to the FPC component mounting terminal, the connection reliability with the component is improved. It becomes a serious defect that is damaged. Further, FIG. 13 is a photograph showing a state in which the sticking out of the adhesive (burr) is attached to the punch die, and when a long composite sheet member is continuously punched in this state, the composite sheet member is fed. There is a problem that the bearing comes in and the punching position accuracy becomes worse.
このため、粘着剤の染み出し（バリ）がパンチ型のダイスに付着した場合は、その都度、パンチ型を清掃して粘着剤の染み出し（バリ）を除去し、またＦＰＣに粘着剤の染み出し（バリ）が転写したかどうかを目視で確認しなければならなかった。 For this reason, each time the adhesive seepage (burr) adheres to the punch die, the punch mold is cleaned to remove the adhesive exudation (burr), and the FPC has an adhesive stain. It was necessary to visually check whether the burrs were transferred.
特に、近年は、より柔軟性のよいＦＰＣが求められており、部品実装の容易さから、キャリアシートに貼り付けて納品する出荷状態が増加しており、粘着剤の染み出し（バリ）が生産性向上の妨げとなっている。 In particular, in recent years, FPCs with better flexibility have been demanded, and due to the ease of component mounting, the shipment state of being attached to a carrier sheet for delivery has been increasing, and adhesive sticking out (burrs) has been produced. It is a hindrance to improvement of sex.
此種、複合シート部材を打ち抜く方法として、シート部材における軟質シートの表面上に、少なくとも一面が滑面である伸縮性のない硬質フィルムの他面を接触させて配置し、該硬質フィルムを介して軟質シートをダイス上に載置し、この状態で軟質シートを打ち抜く方法が知られている（特許文献２参照）。 As a method of punching out this kind of composite sheet member, on the surface of the soft sheet in the sheet member, at least one surface is arranged in contact with the other surface of the non-stretchable hard film, and through the hard film A method is known in which a soft sheet is placed on a die and the soft sheet is punched out in this state (see Patent Document 2).
また、ストリッププレートのダイス孔周りに突起刃を設け、この突起刃で被打ち抜きテープ（シート部材）を切断あるいは切り目を入れることにより、打ち抜きバリの発生を防止しようとする方法も知られている（特許文献３参照）。
特許文献１は、複数枚のＦＰＣをキャリアシートに整列させて貼り付けた構成の一例であり、パンチで打ち抜く方法についての記載はない。 Patent Document 1 is an example of a configuration in which a plurality of FPCs are aligned and pasted on a carrier sheet, and there is no description of a punching method.
特許文献２は、通気用の少円孔（Ｏ．１〜１．０ｍｍ）を開口する方法であり、フィルムとピン挿入孔（ダイス）の壁面との間の摩擦力に局部的な差が生じないように、フィルムの一面を滑面にする必要がある。したがって、打ち抜き形状が円形に限定され、他の形状で上記摩擦力に局部的な差が生じると、打ち抜き辺の挙動が変わって効果を示さなくなる。ＦＰＣに貼り合せる粘着剤シートの場合、複雑な形状に打ち抜かなければならないこともあり、フィルムとダイスの孔壁面との間の摩擦力に局部的な差が発生しないようにするのは無理である。 Patent Document 2 is a method of opening a small circular hole (O.1-1.0 mm) for ventilation, and a local difference occurs in the frictional force between the film and the wall surface of the pin insertion hole (die). It is necessary to make one side of the film smooth so that it does not. Therefore, if the punching shape is limited to a circle and a local difference occurs in the frictional force in other shapes, the behavior of the punching side changes and the effect is not shown. In the case of the pressure-sensitive adhesive sheet to be bonded to the FPC, it may be necessary to punch into a complicated shape, and it is impossible to prevent a local difference from occurring in the frictional force between the film and the hole wall surface of the die. .
特許文献３は、ストリッププレートのダイス孔周りに突起刃を設けてバリを防止しようとするものであるが、長尺の複合シート部材の打ち抜き工程でシート部材が撓むことがあり、ストリッププレートの下面に突起があると、打ち抜き後の開口部がこの突起刃に引っかかって損傷するおそれがある。 In Patent Document 3, an attempt is made to prevent a burr by providing a protruding blade around the die hole of the strip plate. However, the sheet member may be bent in the punching process of the long composite sheet member, and the strip plate If there is a protrusion on the lower surface, the opening after punching may be caught by the protrusion blade and damaged.
ここで、本願出願人は、此種複合シートを打ち抜く際に、裁断箇所からの粘着剤の染み出しを防止するために、下記に述べるような種々の試験を行った。 Here, the applicant of the present application conducted various tests as described below in order to prevent the adhesive from oozing out from the cut portion when punching out this kind of composite sheet.
パンチとダイスとのクリアランスを少なくして、粘着剤の染み出しを防止しようと試みたが、ほとんど効果がなかった。また、パンチとダイスの刃を新しいものに交換したり、パンチのストロークを変えたりしたが、これもほとんど効果がなかった。さらに、粘着剤が柔らかすぎるのではないかと考え、粘着剤を冷蔵庫に投入してみたが、まったく効果がなかった。 An attempt was made to reduce the clearance between the punch and the die to prevent the sticking of the adhesive, but there was little effect. Also, the punch and die blades were replaced with new ones, and the punch stroke was changed, but this also had little effect. Furthermore, I thought that the pressure-sensitive adhesive was too soft and tried to put the pressure-sensitive adhesive into the refrigerator, but it had no effect.
一方、図６に示したように、複合シート部材を上下反転するとともに、リリースシートをクラフト紙にし、打ち抜き時の撓みを抑制しようと試みたところ、粘着剤の染み出しが少なくなり、よい状態であることを確認できた。しかし、粘着剤の染み出し（バリ）を100%なくすことはできなかった。 On the other hand, as shown in FIG. 6, when the composite sheet member was turned upside down and the release sheet was made into kraft paper and an attempt was made to suppress bending at the time of punching, the bleeding of the adhesive was reduced, and in a good condition I was able to confirm that there was. However, 100% of the sticking out of the adhesive (burr) could not be eliminated.
このことから、本願出願人は、柔らかい粘着剤の上に比較的硬いシートを配置して打ち抜くと、粘着剤の染み出しが少なくなると考えた。 From this, the applicant of the present application considered that when a relatively hard sheet is placed on a soft adhesive and punched out, the bleeding of the adhesive is reduced.
そこで、本発明は、粘着剤層を有する複合シート部材をパンチで打ち抜く際、裁断箇所から粘着剤の染み出しを防止できるような打ち抜き方法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a punching method that can prevent bleeding of an adhesive from a cut portion when a composite sheet member having an adhesive layer is punched out.
本発明は上記目的を達成するために提案されたものであり、請求項１記載の発明は、粘着剤層を有する複合シート部材をパンチで打ち抜く方法において、
前記複合シート部材をダイス上に載置し、該複合シート部材の上に、打ち抜かれた際にダイス孔壁面との隙間が開かず、かつダイス孔内に詰まらない程度の適度な伸度を有するフィルムシートを載せて打ち抜くことを特徴とする複合シート部材の打ち抜き方法を提供する。
The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a method of punching a composite sheet member having an adhesive layer with a punch,
The composite sheet member is placed on a die, and has an appropriate degree of elongation so that when punched on the composite sheet member , there is no gap between the die hole wall surface and the die hole is not clogged. Provided is a method for punching a composite sheet member, which is characterized by placing and punching a film sheet.
この構成によれば、複合シート部材の上に、打ち抜かれた際にダイス孔壁面との隙間が開かず、かつダイス孔内に詰まらない程度の適度な伸度を有するフィルムシートを載せることにより、フィルムシートを介してパンチが当接するので、打ち抜かれるまでの荷重が増加し、パンチがより強く押し込まれる。したがって、ダイス孔周りの粘着剤層が、複合シート部材のフィルム基材とフィルムシートとによって押しつぶされ、打ち抜かれるまでの間の粘着財の染み出しを抑止する。
According to this configuration, on the composite sheet member, by placing a film sheet having an appropriate degree of elongation that does not open a gap with the wall surface of the die hole when punched and does not clog in the die hole , Since the punch abuts through the film sheet, the load until punching increases, and the punch is pushed more strongly. Therefore, the adhesive layer around the die hole is crushed by the film base material and the film sheet of the composite sheet member, and the sticking out of the adhesive goods until it is punched out is suppressed.
請求項２記載の発明は、上記フィルムシートは、厚み０．０５〜０．３ｍｍ、引張強度０．４〜０．８ｋＮ／ｍ、伸度１〜５％、引裂強度２０〜６０ｍＮの特性値を有していることを特徴とする請求項１記載の複合シート部材の打ち抜き方法を提供する。 The invention according to claim 2 is characterized in that the film sheet has a characteristic value of thickness 0.05 to 0.3 mm, tensile strength 0.4 to 0.8 kN / m, elongation 1 to 5%, tear strength 20 to 60 mN. The composite sheet member punching method according to claim 1, wherein the composite sheet member is punched out.
この構成によれば、厚み０．０５〜０．３ｍｍ、引張強度０．４〜０．８ｋＮ／ｍ、伸度１〜５％、引裂強度２０〜６０ｍＮのフィルムシートを使用した場合は、打ち抜かれた際にダイス孔壁面との隙間が開かず、かつダイス孔内に詰まらない程度の適度な伸度を有するフィルムシートが複合シート部材の上にあるので、打ち抜かれた部分から粘着剤の染み出しがあったとしても、打ち抜きの過程で適度にフィルムシートが伸びるため、打ち抜かれたフィルムシートがダイス孔を通過する間に、粘着剤を掻きとって降下していく。 According to this configuration, when a film sheet having a thickness of 0.05 to 0.3 mm, a tensile strength of 0.4 to 0.8 kN / m, an elongation of 1 to 5%, and a tear strength of 20 to 60 mN is used, Since there is a film sheet on the composite sheet member that does not open a gap with the wall surface of the die hole and does not clog in the die hole, the adhesive sticks out from the punched part. Even if there is, the film sheet is appropriately stretched during the punching process, so that the punched film sheet is scraped down while passing through the die hole.
これに対して、引張強度０．４ｋＮ／ｍおよび引裂強度２０ｍＮに満たないフィルムシートを使用した場合は、粘着剤の押しつぶしが不十分となり、粘着剤の染み出しを抑えられなくなる。一方、引張強度０．８ｋＮ／ｍおよび引裂強度６０ｍＮより高いフィルムシートを使用した場合は、打ち抜かれるまでに過度の荷重がかかり、ダイス孔周りの粘着剤層にしわが発生する。 On the other hand, when a film sheet having a tensile strength of 0.4 kN / m and a tear strength of 20 mN is used, the pressure-sensitive adhesive is not sufficiently crushed, and the pressure-sensitive adhesive cannot be oozed out. On the other hand, when a film sheet having a tensile strength of 0.8 kN / m and a tear strength of 60 mN is used, an excessive load is applied before punching and wrinkles are generated in the adhesive layer around the die hole.
請求項３記載の発明は、上記フィルムシートは、厚み０．０３〜０．２０ｍｍの紙基材の両面にポリプロピレン樹脂をそれぞれ０．０１〜０．０５ｍｍ被覆したものであることを特徴とする請求項１記載の複合シート部材の打ち抜き方法を提供する。 The invention described in claim 3 is characterized in that the film sheet is obtained by coating polypropylene resin on 0.01 to 0.05 mm on both sides of a paper base having a thickness of 0.03 to 0.20 mm. A method for punching a composite sheet member according to Item 1 is provided.
この構成によれば、上記厚みの範囲にある紙基材によって適度の引張強度、伸度、および引裂強度が得られるとともに、ポリプロピレン樹脂が紙基材の両面に被覆されているので、搬送も滑らかに行うことができ、最適な材料といえる。 According to this configuration, moderate tensile strength, elongation, and tear strength can be obtained by the paper base within the above-mentioned thickness range, and since the polypropylene resin is coated on both sides of the paper base, the conveyance is also smooth. It can be said that it is an optimal material.
本発明は、複合シート部材の上に適度な伸度、即ち、打ち抜かれた際にダイス孔壁面との隙間が開かず、かつダイス孔内に詰まらない程度の適度な伸度を有するフィルムシートを載せて打ち抜くようにしたので、打ち抜かれた部分から粘着剤の染み出しがあったとしても、打ち抜きの過程で適度にフィルムシートが伸びて粘着剤を掻きとっていくため、打ち抜き部分から粘着剤が染み出すことを防止できる。したがって、粘着剤の染み出しがバリとなって実装品に付着したり、パンチ型のダイスなどに付着して打ち抜き精度が悪化したりするような不具合を解消することができる。
The present invention provides a film sheet having an appropriate degree of elongation on the composite sheet member, that is, an appropriate degree of elongation that does not open a gap with the wall surface of the die hole when punched and does not clog the die hole. Since it was placed and punched out, even if the adhesive oozes out from the punched part, the film sheet stretches appropriately during the punching process and scrapes the adhesive, so the adhesive is removed from the punched part. It can prevent exudation. Therefore, it is possible to eliminate such a problem that the sticking out of the adhesive becomes a burr and adheres to the mounted product, or adheres to a punch die or the like and the punching accuracy deteriorates.
また、所定厚みの紙基材の両面にポリプロピレン樹脂を被覆して上記フィルムシートを形成した場合には、上述の効果に加えて、紙基材により適度の引張強度、伸度、および引裂強度が得られるとともに、ポリプロピレン樹脂の被覆により搬送も滑らかに行うことができる。 In addition, when the film sheet is formed by coating a polypropylene resin on both sides of a paper base having a predetermined thickness, in addition to the above effects, the paper base has an appropriate tensile strength, elongation, and tear strength. In addition to being obtained, it can be smoothly conveyed by coating with polypropylene resin.
以下、本発明に係る複合シート部材の打ち抜き方法について、好適な実施例をあげて説明する。粘着剤層を有する複合シート部材をパンチで打ち抜く際、裁断箇所から粘着剤の染み出しを防止できるようにするという目的を達成するために、本発明は粘着剤層を有する複合シート部材をパンチで打ち抜く方法において、
前記複合シート部材をダイス上に載置し、該複合シート部材の上に適度な伸度を有するフィルムシートを載せて打ち抜くことにより実現した。
Hereinafter, the punching method of the composite sheet member according to the present invention will be described with reference to preferred examples. In order to achieve the purpose of preventing the adhesive from bleeding out from the cut portion when punching out a composite sheet member having an adhesive layer, the present invention provides a punch for a composite sheet member having an adhesive layer. In the punching method,
The composite sheet member was placed on a die, and a film sheet having an appropriate elongation was placed on the composite sheet member and punched out.
図１〜図４にしたがって、本発明にかかる複合シート部材の打ち抜き方法について説明する。なお、説明の都合上、背景技術の図面と同一構成部分には同一符号を使用する。 A method for punching a composite sheet member according to the present invention will be described with reference to FIGS. For convenience of explanation, the same reference numerals are used for the same components as those in the background art drawings.
粘着剤層を有する複合シート部材１０は、ＰＥＴなどからなるフィルム基材１１の一方の面に、例えばアクリル系樹脂の粘着剤を塗布して粘着剤層１２を形成し、さらに、粘着剤層１２にクラフト紙などからなるリリースシート１３を貼り合わせて構成されている。 The composite sheet member 10 having an adhesive layer forms an adhesive layer 12 by applying, for example, an acrylic resin adhesive on one surface of a film substrate 11 made of PET or the like. And a release sheet 13 made of kraft paper or the like.
図１に示すように、フィルム基材１１を上にして複合シート部材１０をダイス２１に載置し、さらに、複合シート部材１０の上に適度な伸度を有するフィルムシート３０を載せる。 As shown in FIG. 1, the composite sheet member 10 is placed on a die 21 with the film base 11 facing up, and a film sheet 30 having an appropriate elongation is placed on the composite sheet member 10.
このフィルムシート３０は、厚み０．０５〜０．３ｍｍ、引張強度０．４〜０．８ｋＮ／ｍ、伸度１〜５％、引裂強度２０〜６０ｍＮの特性値を有している。
好ましくは、厚み０．１〜０．１５ｍｍ、引張強度０．５〜０．６５ｋＮ／ｍ、伸度１．２〜２％、引裂強度３０〜４５ｍＮの特性値のフィルムシートが推奨される。
This film sheet 30 has characteristic values of thickness 0.05 to 0.3 mm, tensile strength 0.4 to 0.8 kN / m, elongation 1 to 5%, and tear strength 20 to 60 mN.
Preferably, a film sheet having a thickness of 0.1 to 0.15 mm, a tensile strength of 0.5 to 0.65 kN / m, an elongation of 1.2 to 2%, and a tear strength of 30 to 45 mN is recommended.
図２に示すように、パンチ２０の下降が始まってフィルムシート３０を介して複合シート部材１０が押圧されると、打ち抜き境界部分Ａ１で粘着剤層１２がフィルムシート３０とフィルム基材１１によって押しつぶされる。したがって、打ち抜かれるまでの間、粘着剤の染み出しが抑えられる。 As shown in FIG. 2, when the punch 20 starts to descend and the composite sheet member 10 is pressed through the film sheet 30, the adhesive layer 12 is crushed by the film sheet 30 and the film substrate 11 at the punching boundary portion A <b> 1. It is. Therefore, the bleeding of the pressure-sensitive adhesive is suppressed until it is punched out.
図３に示すように、打ち抜きの過程でフィルムシート３０が適宜に伸びるため、打ち抜かれたフィルムシート３０がダイス孔を通過する間に、ダイス２１の孔壁面および複合シート部材１０の開口側面Ａ２を擦りながら粘着剤を掻き取っていく。 As shown in FIG. 3, since the film sheet 30 is appropriately stretched during the punching process, the hole wall surface of the die 21 and the opening side surface A2 of the composite sheet member 10 are formed while the punched film sheet 30 passes through the die hole. Scrape off the adhesive while rubbing.
図４に示すように、パンチ２０がさらに下降して複合シート部材１０とフィルムシート３０の両方が裁断されると、染み出した粘着剤２２はフィルムシート３０の外端部で掻き取られて抜きかすと一緒に落下する。したがって、ダイス２１の孔壁面および複合シート部材１０の開口側面Ａ３に粘着剤が付着してバリ状に固まることがない。 As shown in FIG. 4, when the punch 20 is further lowered and both the composite sheet member 10 and the film sheet 30 are cut, the oozed adhesive 22 is scraped and removed at the outer end of the film sheet 30. Fall with the dregs. Therefore, the adhesive does not adhere to the hole wall surface of the die 21 and the opening side surface A3 of the composite sheet member 10 and harden in a burr shape.
図５は本発明に係る打ち抜き方法で打ち抜いた複合シート部材の写真であり、パンチ打ち抜き部分には粘着剤の染み出し（バリ）がまったく発生していなかった。 FIG. 5 is a photograph of the composite sheet member punched by the punching method according to the present invention, and no adhesive bleeding (burrs) occurred at the punch punched portion.
なお、前述したように、フィルムシート３０は、厚み０．０５〜０．３ｍｍ、引張強度０．４〜０．８ｋＮ／ｍ、伸度１〜５％、引裂強度２０〜６０ｍＮの特性値のものが、打ち抜きの過程で適度にフィルムシート３０が伸びて、粘着剤を掻きとって降下していく。 As described above, the film sheet 30 has a characteristic value of thickness 0.05 to 0.3 mm, tensile strength 0.4 to 0.8 kN / m, elongation 1 to 5%, and tear strength 20 to 60 mN. However, the film sheet 30 stretches moderately during the punching process, and the adhesive is scraped down.
このような特性値を有するフィルムシートとして推奨されるフィルムシートは、厚み０．０３〜０．２０ｍｍの紙基材の両面にポリプロピレン樹脂をそれぞれ、０．０１〜０．０５ｍｍ被覆したものである。そして、もっとも搬送しやすく入手が容易なフィルムシートとして、厚み０．０７ｍｍの紙基材の両面にポリプロピレン樹脂をそれぞれ０．０２ｍｍ被覆したものが特に推奨される。なお、被覆する材料としてはポリエチレン、ポリエステル、およびそれらの複合材料などがあげられる。 A film sheet recommended as a film sheet having such a characteristic value is one in which a polypropylene resin is coated on 0.01 to 0.05 mm on both sides of a paper base having a thickness of 0.03 to 0.20 mm. And as a film sheet which is most easily transported and easily available, a film sheet having a 0.07 mm thickness coated with a polypropylene resin on both sides is particularly recommended. Examples of the material to be coated include polyethylene, polyester, and composite materials thereof.
引張強度０．４ｋＮ／ｍおよび引裂強度２０ｍＮに満たないフィルムシートを使用した場合は、粘着剤の押しつぶしが不十分となり、粘着財の染み出しを抑えられなくなる。一方、引張強度０．８ｋＮ／ｍおよび引裂強度６０ｍＮより高いフィルムシートを使用した場合は、打ち抜かれるまでに過度の荷重がかかり、ダイス孔周りの粘着剤層にしわが発生する。 When a film sheet having a tensile strength of 0.4 kN / m and a tear strength of 20 mN is used, the pressure-sensitive adhesive is not sufficiently crushed, and the sticking out of the adhesive goods cannot be suppressed. On the other hand, when a film sheet having a tensile strength of 0.8 kN / m and a tear strength of 60 mN is used, an excessive load is applied before punching and wrinkles are generated in the adhesive layer around the die hole.
伸度が１％に満たないフィルムシートを使用した場合は、打ち抜かれたフィルムシートとダイス孔壁面との隙間が開いて、染み出してきた粘着剤を掻き取りきれなくなる。また、伸度が５％よりも高いフィルムシートを使用すると、ダイス孔内に打ち抜かれたフィルムシートが詰まってしまい、抜きカスの排出が困難になる。
When a film sheet having an elongation of less than 1% is used, a gap between the punched film sheet and the die hole wall surface is opened, and the sticking adhesive cannot be scraped off. Moreover, when a film sheet having an elongation higher than 5% is used, the film sheet punched into the die hole is clogged, and it is difficult to discharge the punched residue.
なお、本発明は、本発明の精神を逸脱しない限り種々の改変を為すことができ、そして、本発明が該改変されたものに及ぶことは当然である。 It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.
１０ 複合シート部材
１１ フィルム基材
１２ 粘着剤層
１３ リリースシート
１４ ＦＰＣ
１５ キャリアシート
２０ パンチ
２１ ダイス
２２ 染み出した粘着剤
２３ ストリッププレート
３０ フィルムシート
DESCRIPTION OF SYMBOLS 10 Composite sheet member 11 Film base material 12 Adhesive layer 13 Release sheet 14 FPC
15 Carrier sheet 20 Punch 21 Die 22 Exuded adhesive 23 Strip plate 30 Film sheet
Claims (3)
前記複合シート部材をダイス上に載置し、該複合シート部材の上に、打ち抜かれた際にダイス孔壁面との隙間が開かず、かつダイス孔内に詰まらない程度の適度な伸度を有するフィルムシートを載せて打ち抜くことを特徴とする複合シート部材の打ち抜き方法。 In the method of punching out a composite sheet member having an adhesive layer,
The composite sheet member is placed on a die, and has an appropriate degree of elongation so that when punched on the composite sheet member, there is no gap between the die hole wall surface and the die hole is not clogged. A method of punching a composite sheet member, wherein a film sheet is placed and punched.
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| JPS6114027A (en) * | 1984-06-28 | 1986-01-22 | Yokohama Rubber Co Ltd:The | Blanking method of composite plate and blanking die |
| JPH11297769A (en) * | 1998-04-10 | 1999-10-29 | Hitachi Cable Ltd | Manufacture of bga wiring tape |
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