JPH0244552Y2 - - Google Patents
Info
- Publication number
- JPH0244552Y2 JPH0244552Y2 JP8280886U JP8280886U JPH0244552Y2 JP H0244552 Y2 JPH0244552 Y2 JP H0244552Y2 JP 8280886 U JP8280886 U JP 8280886U JP 8280886 U JP8280886 U JP 8280886U JP H0244552 Y2 JPH0244552 Y2 JP H0244552Y2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- aluminum foil
- heat
- film
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011888 foil Substances 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229920003002 synthetic resin Polymers 0.000 claims description 14
- 239000000057 synthetic resin Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 6
- 230000037303 wrinkles Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、射出成形によつて得られた成形
体、特に、電子、電気機器類を収納して、これら
を電磁波からシールドできる射出成形体に関す
る。[Detailed description of the invention] [Industrial application field] This invention is a molded object obtained by injection molding, especially an injection molded object that can house electronic and electrical equipment and shield them from electromagnetic waves. Regarding.
従来、電磁波シールド性を有する成形体として
は、合成樹脂の表面に、導電性粉末を混入した塗
料を塗布したり、金属メツキや金属蒸着を施し
て、導電性被膜を表面に形成するものや、金属粉
や炭素繊維などの導電性フイラーを練り込んでお
くものがある。
Conventionally, molded products with electromagnetic shielding properties have been made by coating the surface of a synthetic resin with a paint containing conductive powder, or by applying metal plating or metal vapor deposition to form a conductive film on the surface. Some are kneaded with conductive fillers such as metal powder or carbon fiber.
上記のうち、導電性被膜を形成する方法は、成
形体に一個づつ被膜形成処理を施さなければなら
ないので、作業性が悪く、コストが高くなり、ま
た、取り扱い中に、被膜が剥離し易い問題があ
る。 Among the methods mentioned above, the method of forming a conductive film requires coating forming treatment on each molded object one by one, which results in poor workability and high cost, and also has the problem that the film easily peels off during handling. There is.
一方、後者は、フイラーによつて合成樹脂の物
性が低下し、また充分な電磁波シールド性が得ら
れない問題がある。 On the other hand, the latter has the problem that the filler deteriorates the physical properties of the synthetic resin and that sufficient electromagnetic shielding properties cannot be obtained.
上記のほか、金属板又は金属箔を用いたものも
あるが、電磁性シールド性に優れているものの、
複雑な形状に加工するのが難しいという問題があ
る。 In addition to the above, there are also products using metal plates or metal foils, but although they have excellent electromagnetic shielding properties,
There is a problem in that it is difficult to process into complex shapes.
この考案の目的は、上記のような問題を解決
し、電磁波シールド性が良好で複雑な形状が得ら
れる成形体を提供することである。 The purpose of this invention is to solve the above-mentioned problems and provide a molded article that has good electromagnetic shielding properties and can be formed into a complex shape.
上記の目的を達成するため、この考案において
は、アルミニウム箔の少くとも片面に、間欠的貼
着層を介して熱収縮性合成樹脂フイルムを積層し
た積層体を加熱収縮させ、これをインサート基材
として、熱可塑性合成樹脂を射出成形して、電磁
波シールド成形体を形成したのである。
In order to achieve the above object, in this invention, a laminate in which a heat-shrinkable synthetic resin film is laminated on at least one side of an aluminum foil through an intermittent adhesive layer is heated and shrunk, and this is used as an insert base material. As a result, an electromagnetic shielding molded body was formed by injection molding a thermoplastic synthetic resin.
上記のようにアルミニウム箔を用いているた
め、電磁波シールド性に優れ、また予めアルミニ
ウム箔には多数の細かい皺が形成されているの
で、成形時の展延をこの皺が吸収して箔が破断せ
ず、複雑な形状に成形することができる。
As mentioned above, since aluminum foil is used, it has excellent electromagnetic shielding properties, and since the aluminum foil has many fine wrinkles formed in advance, these wrinkles absorb the spreading during molding and the foil breaks. It can be molded into complex shapes.
まず、アルミニウム箔を含む積層体について、
第１図及び第２図に基いて説明する。
First, regarding the laminate containing aluminum foil,
This will be explained based on FIGS. 1 and 2.
第１図に示すように、積層体１は、アルミニウ
ム箔２に、間欠的貼着層３を介して、熱収縮性合
成樹脂フイルム４を積層したものである。なお、
後に述べる射出成形時の樹脂との接合性を良くす
るため、接着性フイルムまたはコーテイング層５
を設けることができる。 As shown in FIG. 1, the laminate 1 is made by laminating a heat-shrinkable synthetic resin film 4 on an aluminum foil 2 with an intermittent adhesive layer 3 interposed therebetween. In addition,
In order to improve the bondability with the resin during injection molding, which will be described later, an adhesive film or coating layer 5 is added.
can be provided.
上記熱収縮性合成樹脂フイルム４は、ポリエチ
レン、ポリプロピレン、塩化ビニル、ポリスチレ
ン、ポリエステル、エチレン−酢酸ビニル共重合
体等の樹脂から成り、出来る限り熱収縮率の大き
い例えば50％程度のものを用いるのが好ましい。
なお、このフイルム４は、単体のほか、２種類以
上のフイルムの積層体であつてもよい。 The heat-shrinkable synthetic resin film 4 is made of a resin such as polyethylene, polypropylene, vinyl chloride, polystyrene, polyester, ethylene-vinyl acetate copolymer, etc., and it is preferable to use a film with as high a heat shrinkage rate as possible, for example, about 50%. is preferred.
The film 4 may be a single film or a laminate of two or more types of films.
上記間欠的貼着層３は、アルミニウム箔２とフ
イルム４を貼り合せることのできる手段を用いれ
ばよく、接着剤のほかに、フイルム４の特性を利
用して、加熱融着や超音波融着などによつてもよ
い。この貼着層３のパターンは、第３図イに示す
ような格子状、ロに示すような点状など、いずれ
でもよく、要は全面に設けることなく間欠部６が
存在するパターンであればよい。なお、この間欠
部６に、加熱によつて流動する樹脂層が存在して
いてもよい。 The intermittent adhesion layer 3 may be formed by any means capable of bonding the aluminum foil 2 and the film 4. In addition to adhesives, the properties of the film 4 may be used to form heat fusion or ultrasonic fusion. etc. The pattern of this adhesive layer 3 may be either a lattice pattern as shown in FIG. 3A or a dot pattern as shown in FIG. good. Note that a resin layer that flows by heating may be present in the intermittent portion 6.
第２図に示すように、アルミニウム箔２の両面
に、フイルム４，４を積層してもよい。 As shown in FIG. 2, films 4, 4 may be laminated on both sides of the aluminum foil 2.
上記のような積層体１を加熱すると、第４図に
示すようにフイルム４，４が収縮する。一方、ア
ルミニウム箔２は、間欠的貼着層３を介してフイ
ルム４，４に貼り合されているので、フイルム
４，４の収縮に伴つて、それぞれの間欠部６にお
いて引き寄せられ、細かい皺が生じ、インサート
基材１０が出来上る。 When the laminate 1 as described above is heated, the films 4, 4 contract as shown in FIG. On the other hand, since the aluminum foil 2 is bonded to the films 4, 4 through the intermittent adhesion layer 3, as the films 4, 4 shrink, they are pulled together at the intermittent portions 6, and fine wrinkles are formed. The insert base material 10 is completed.
このようにして細かい皺を生ぜしめた基材１０
を第５図に示すように、成形用金型１１と１２の
間に挿入し、両金型を圧着した後、溶融した熱可
塑性合成樹脂をノズル１３から注入し、冷却固化
した後に取り出すと、第６図に示すような成形体
１４が得られる。図中、１５は、注入した合成樹
脂層である。 Base material 10 with fine wrinkles created in this way
As shown in FIG. 5, after inserting between the molding molds 11 and 12 and pressing the two molds together, molten thermoplastic synthetic resin is injected through the nozzle 13, cooled and solidified, and then taken out. A molded body 14 as shown in FIG. 6 is obtained. In the figure, 15 is an injected synthetic resin layer.
上記成形体の形状は、任意である。円形、楕円
形、多角形など、いずれでもよい。 The shape of the molded body is arbitrary. It may be circular, oval, polygonal, etc.
この考案によれば、以上のように、アルミニウ
ム箔に熱収縮性フイルムを貼り合せて、これを加
熱収縮させ、アルミニウム箔に細かい皺を形成し
たものをインサート基材として、これに熱可塑性
合成樹脂層を設けたものであるから、成形によつ
てシートが展延しても、アルミニウム箔の皺が、
伸びを吸収して、破断等が生じず、複雑な形状に
成形可能で、かつアルミニウム箔が有する優れた
電磁波シールド性がそのまま維持され、また、ア
ルミニウム箔の両面が合成樹脂で被われているの
で、電気絶縁性を有し、かつ箔の腐食のおそれも
なく、取り扱い中に電磁波シールド性が害される
こともない等の効果があげることができる。
According to this invention, as described above, a heat-shrinkable film is attached to aluminum foil, and this is heated and shrunk to form fine wrinkles on the aluminum foil.The insert base material is used as an insert base material, and a thermoplastic synthetic resin is attached to this. Since the aluminum foil has layers, even if the sheet is expanded during molding, the wrinkles in the aluminum foil will not be removed.
It absorbs elongation, does not break, can be molded into complex shapes, maintains the excellent electromagnetic shielding properties of aluminum foil, and is coated with synthetic resin on both sides of the aluminum foil. It has electrical insulation properties, there is no fear of corrosion of the foil, and the electromagnetic shielding properties are not impaired during handling.
第１図及び第２図はインサート基材に用いる積
層体の例を示す断面図、第３図は貼着層のパター
ンを示す平面図、第４図は同上の積層体を加熱収
縮されたインサート基材を示す断面図、第５図は
成形方法の例を示す断面線図、第６図は射出成形
体の断面図である。
１……積層体、２……アルミニウム箔、３……
間欠的貼着層、４……熱収縮性合成樹脂フイル
ム、６……間欠部、１０……インサート基材、１
４……成形体、１５……熱可塑性合成樹脂層。
Figures 1 and 2 are cross-sectional views showing an example of a laminate used as an insert base material, Figure 3 is a plan view showing a pattern of the adhesive layer, and Figure 4 is an insert in which the same laminate is heat-shrinked. FIG. 5 is a sectional view showing a base material, FIG. 5 is a sectional diagram showing an example of a molding method, and FIG. 6 is a sectional view of an injection molded product. 1... Laminated body, 2... Aluminum foil, 3...
Intermittent adhesive layer, 4... Heat-shrinkable synthetic resin film, 6... Intermittent portion, 10... Insert base material, 1
4... Molded body, 15... Thermoplastic synthetic resin layer.
Claims (1)
層を介して熱収縮性合成樹脂フイルムを積層した
積層体を加熱収縮され、これをインサート基材と
して、熱可塑性合成樹脂を射出成形した電磁波シ
ールド射出成形体。 Electromagnetic shield injection made by heat-shrinking a laminate in which a heat-shrinkable synthetic resin film is laminated on at least one side of aluminum foil via an intermittent adhesive layer, and injection-molding a thermoplastic synthetic resin using this as an insert base material. Molded object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8280886U JPH0244552Y2 (en) | 1986-05-29 | 1986-05-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8280886U JPH0244552Y2 (en) | 1986-05-29 | 1986-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62193798U JPS62193798U (en) | 1987-12-09 |
| JPH0244552Y2 true JPH0244552Y2 (en) | 1990-11-27 |
Family
ID=30935798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8280886U Expired JPH0244552Y2 (en) | 1986-05-29 | 1986-05-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244552Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525280Y2 (en) * | 1986-09-19 | 1993-06-25 |
-
1986
- 1986-05-29 JP JP8280886U patent/JPH0244552Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62193798U (en) | 1987-12-09 |
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