Manufacture of electrical laminated sheet

[Detailed Description of the Invention]

[Field of the Invention] This invention relates to the process of the laminate sheet for electricity used for electronic equipment etc. [Background of the Invention] Generally the laminate sheet for electricity is built by carrying out lamination fabrication of the resin impregnating substrate (pre-preg) with metallic foil predetermined leaves and if needed. [Objects of the Invention] An object of this invention is to provide the process of the laminate sheet for electricity which can obtain what was very excellent in fabrication nature. [An indication of an invention] By improving the conventional process, the artificer was going to achieve the above-mentioned object and repeated research. As a result, the fluoro-resin with sufficient mobility in which the melting point is lower than tetrafluoroethylene resin and tetrafluoroethylene resin is used as a fluoro-resin impregnated with a substrate, A fluoro-resin layer is provided in the outside of the resin impregnating substrate of the outermost layer between resin impregnating substrates, When carrying out lamination fabrication, using a fluoro-resin with mobility lower the melting point than tetrafluoroethylene resin and tetrafluoroethylene resin and sufficient also as resin of a fluoro-resin layer, fabrication nature found out that Fun of excel [ very much ] improves further, and completed this invention. Therefore, this invention is a basis (Establishment(ing) a fluoro-resin layer also on the outside of the resin impregnating substrate of both Ri 1 Therefore, and being made to make the resin impregnating substrate made to come to impregnate 4 into it, while making a fluoro-resin layer intervene in between) about a fluoro-resin. As the fluoro-resin which it is a process of the laminate sheet for electricity which carries out predetermined-leaves lamination fabrication, and impregnates with the above-mentioned substrate, and the resin of the above-mentioned fluoro-resin layer, The melting point makes the gist the process of the laminate sheet for electricity using a fluoro-resin with mobility low and sufficient rather than tetrafluoroethylene resin and tetrafluoroethylene resin. the following -- this -- a detailed description of the invention is carried out. Here, that fabrication nature is excellent means that there is no portion unfused (opaque) in appearance, and board thickness accuracy is excellent. As the fluoro-resin with sufficient mobility in which the melting point is lower than the tetrafluoroethylene resin (it abbreviates to "PTFE" hereafter) used by this invention, Although not limited in particular, they are tetrafluoroethylene 6 fluoridation propylene copolymerization resin (it abbreviates to rFEPJ hereafter), tetrafluoroethylene perfluoroalkyl vinyl ether copolymerization resin (it abbreviates to rPFAJ hereafter), and polychloro-trifluoroethylene (PCTFF.), for example. Polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), A tetrafluoro ethylene ethylenic copolymer (ETFB), a chloro trifluoro ethylene ethylenic copolymer (E CT F E), etc. are raised, and it is independent respectively, or two or more sorts are mixed, and it is used. Since FEP and PFA are closely excellent in the characteristics other than the melting point especially in PTFE, it is desirable. The resin impregnating substrate which makes the fluoro-resin with sufficient mobility in which the melting point is low come to impregnate a substrate is used for the process of the laminate sheet for electricity concerning this invention rather than PTFE and PTFE. Dispersion of the resin with which such a resin impregnating substrate specifically mixes a fluoro-resin with mobility lower the melting point than PTFE and PTFE and sufficient for a substrate, for example, Or it soaks in what etc. mixed the fluorocarbon resin dispersion with sufficient mobility in which the melting point is lower than P TF E to PTFE dispersion, Dispersion of the resin which mixes the fluoro-resin with sufficient mobility in which the melting point is lower than PTFE and P T F E, or P Apply to a substrate what mixed the fluorocarbon resin dispersion with sufficient mobility in which the melting point is lower than P'rFg to T F FE dispersion. A substrate is heated and it is made to dry, after impregnating a substrate with the fluoro-resin with sufficient mobility in which the melting point is lower than P T r"FE and P T F E. Or although it can obtain by fusing the fluoro-resin and PTFE with sufficient mobility in which the melting point is lower than PTFE (calcination), it is not restricted to these methods. As the fluoro-resin which is used by this invention and which is impregnated with a substrate, Especially if it is a fluoro-resin with mobility lower power-proof than PTFE and PTFE and sufficient, it will not limit, but what mixed the fluoro-resin with mobility lower the melting point to 100 weight sections (it abbreviates to a "part" hereafter) than P T F E in PTFE and sufficient at a rate of 0.5~100 copies is preferred. The whole melting point falls in case of more rates than being [ a possibility that it may become impossible to aim at improvement in fabrication nature in case of rates fewer than the minimum of the range ]"-Limit, and there is a possibility that heat resistance etc. may worsen. As a substrate used by this invention, what is generally used as an object for manufacture of nonwoven fabric 2 papers, such as cloth, such as a woven glass fabric, and a nonwoven glass fabric, and the other laminate sheets for electricity is used. While making a fluoro-resin layer intervene between resin impregnating substrates and making and piling up the above resin impregnating substrate predetermined leaves, a fluoro-resin layer is provided also in the outside of the resin impregnating substrate of both the external surfaces. And if needed, metallic foil, such as copper foil, is piled up at least on the one side, lamination fabrication is carried out, and the laminate sheet for electricity is obtained. As the resin of a fluoro-resin layer used by this invention, If the fluoro-resin with sufficient mobility in which the melting point is lower than PTI4 and PTFE is used and a fluoro-resin layer is seen separately, Both are used only either of these both (these both may be mixed, it may be used and these both of each other may be together put in 7Ij in the separate layer.).]

If it sees with the whole laminate sheet for electricity of One, both these both will be used. Although Establishment &J To is also made by application etc. as a fluoro-resin layer, it is good to be used in the form of a film (fluorine system film) etc. When it uses in the form of fill J-, the thickness regulation of a fluoro-resin layer is Tooth and watermelons. A film is the cutting method. Produce by the calendar method 7 casting method etc., and it uses, or a commercial item is used. the case where a film is used -- I T F F -- also depending -- although the use number of sheets of the film which consists of a fluoro-resin with sufficient mobility in which the melting point is low is based also on the thickness of a film, and the number of sheets of the resin impregnating substrate to be used, it is effective by the range grade below one sheet, with -1= resin impregnating substrate number of sheets. I) When it may provide in arbitrary positions when the use number of sheets of the film which consists of a fluoro-resin with sufficient mobility in which the melting point is lower than T F E is about 1~4 sheets, but fabrication nature is thought as important, An effect becomes large, so that the position in which the melting point provides the film which consists of a low fluoro-resin with sufficient mobility rather than PTFE is close to the surface of the laminate sheet for electricity. For example, the film which consists of a fluoro-resin with sufficient mobility in which the melting point is lower than PTFE, Although it is good to make it the outside of the resin impregnating substrate of both the external surfaces and/or its resin impregnating substrate, and its provide immediately between inside resin impregnating substrates (between [ when only two sheets use a resin impregnating substrate ] these), it does not restrict to this. Although the conditions in particular of lamination fabrication are not limited, they are preferred. [ of temperature 340~400degreeC, pressure 1~100 kg/aJ, and time 10~180 minutes ] According to the process of the laminate sheet for electricity of this invention, the above resin impregnating substrates are used, Since it is made to carry out lamination fabrication as the above fluoro-resin layers are provided also in the outside of the resin impregnating substrate of both the external surfaces while making the above fluoro-resin layers intervene between resin impregnating substrates, It has not fused, and there is no opaque portion, and moreover board thickness accuracy improved, namely, it can obtain the laminate sheet for electricity which was very excellent in fabrication nature. The obtained laminate sheet for electricity is punching processability. Other characteristics, such as moisture resistance, heat resistance, and an electrical property, are carried out Toward] 2. Below, an example and a comparative example are shown. (Example 1) It calcinated, after impregnating a woven glass fabric (Nitto Boseki @WE 05 F) with the fluoro-resin mixed at a rate shown in the 1st table, and the resin impregnating substrate of W and Mi 0.061■ was built resin content 60%. While making film (thickness 0.030+u) 3 which consists of PTFE(s) intervene one sheet at a time between resin impregnating substrates 1 using this resin impregnating substrate so that it may see to Drawing 1, it provides one sheet at a time film 3 which consists of PTFR(s) in the outside of resin impregnating substrate l of both the external surfaces, It provides one sheet at a time film (thickness 0.0251-) 2 which consists of PFA(s) in the outside, They are 11 sheets about film 3 which consists of two sheets and P T F E film 2 which consists resin impregnating substrate 1 of ten sheets and P FA, And two sheets were piled up, lamination fabrication of the 114 foil (thick Mi 0.018 dragon) 4 was carried out on temperature 360"C, the pressure of 20kg/cd, and the conditions for time 30 minutes, and the laminate sheet for electricity was built. (Example 2) It calcinates, after impregnating a woven glass fabric (Nitto Boseki @WE 05 F) with the fluoro-resin mixed at a rate shown in the 1st table, and they are resin content 50% and thickness (a 1 or 05-mm resin impregnating substrate was built.). While making film (thickness 0.0301*) 3 which consists of PTFF(s) intervene one sheet at a time between resin impregnating substrates 1 using this resin impregnating substrate so that it may see to Drawing 2, It provides one sheet at a time film (thickness 0.025■ Seal) 2 which consists of PFA(s) in the outside of resin impregnating substrate 1 of an inside-and-outside side, and provides one sheet at a time further film 3 which consists of P T F E in the outside, Film 3 which consists of two sheets and PTFE film 2 which consists resin impregnating substrate 1 of ten sheets and PFA is piled up for 11 sheets, two sheets are piled up for copper foil (thickness 0.0181) 4, and it is temperature 360degreeC. Lamination fabrication was carried out on pressure 20 kg/cJ and the conditions for time 30 minutes, and the laminate sheet for electricity was built. (Example 3) It calcinated, after impregnating a woven glass fabric (Nitto Boseki ■WE 05 B) with the fluoro-resin mixed at a rate shown in the 1st table, and the resin impregnating substrate of thickness 0.05 dragon was built resin:l Intent 50%. Every one sheet of only that film (thickness 0.025+u) 2 that consists of PFA(s) between inside resin impregnating substrates 1 is made to intervene immediately with resin impregnating substrate 1 of an inside-and-outside side using this resin impregnating substrate, so that it may see to Drawing 3. While making film (thickness 0.030 crane) 3 which consists of PTFE(s) intervene one sheet at a time among other resin impregnating substrates 1, It provides one sheet at a time film 3 which consists of P T F I? in the outside of resin impregnating substrate l of both another side, Fill J which consists of two sheets and PTFE film 2 which consists resin impregnating substrate 1 of ten sheets and P FA Nine sheets were piled up for 3, two sheets were piled up for copper foil (thickness 0.018m5) 4, lamination fabrication was carried out on temperature 360degreeC, pressure 29 kg/cJ, and the conditions for time 30 minutes, and the laminate sheet for electricity was built. (Comparative example) It calcinated, after impregnating a woven glass fabric ([1 east spinning @wEo 5E) with the fluoro-resin of only PTFF:, as shown in the 1st table, and thickness 0 and the resin impregnating substrate of 06 mm were built resin content 60%. While making film (thickness 0.0301 Grace) 3 which consists of PTFE(s) intervene one sheet at a time between resin impregnating substrates 1 using this resin Gold dipping substrate, without using the film which consists of PFA(s) so that it may see to Drawing 4, It provides one sheet at a time film 3 which consists of PTFE(s) also in the outside of resin impregnating substrate 1 of an inside-and-outside side, film 3 which consists resin impregnating substrate 1 of ten sheets and PTFE -- 11 sheets and copper foil (0.018 mm in thickness) -- two sheets were piled up, lamination fabrication of 4 was carried out on temperature 370degreeC and the conditions for pressure'l Q kg /cla 2 hours and 50 minutes, and the laminate sheet for electricity was built. ]

2 The fabrication nature of each laminate sheet t Hold it for electricity obtained by the above-mentioned example and the comparative example, an unfused ratio, and board thickness accuracy, moisture resistance, insulation resistance, heat resistance, and punching processability were investigated, and the result was united with the 1st table and shown. An electrical property is insulation II (it was made to represent with Anti). The unfused ratio judged the translucent portion by surface ratio [%] near as a non-fusion zone except for copper foil of both sides of each laminate sheet for electricity after fabrication. Board thickness accuracy showed the variation in board thickness at a time by the milli number about each five laminate sheets for electricity, when the laminate sheet for electricity of the board thickness of 0.8 mm was built. Moisture resistance was investigated on the conditions of 96 hours by 90degreeC and 65%RH. The processing conditions before measuring insulation resistance were D-2/100. Heat resistance showed the temperature which is maintained into oven for 30 minutes and abnormalities do not generate, and the temperature which abnormalities generated at intervals of 10 degreeC. While a thing of a comparative example is 10~95% of an unfused ratio, a laminate sheet for electricity obtained in Example 1~3 has no unfused ratio as 0%, so that it may see to the 1st table. And board thickness accuracy is improving compared with a thing of a comparative example. That is, fabrication nature is very excellent. Moisture resistance, insulation resistance, heat resistance, and punching processability of the laminate sheet for electricity obtained in Example 1~3 are also improving compared with the thing of a comparative example. [Effect of the Invention] the process of the laminate sheet for electricity of this invention -- with -- as the fluoro-resin of the fluoro-resin layer provided in the outside of the resin impregnating substrate of both the affairs side while making basis H intervene between an impregnating To judge fluoro-resin and a resin impregnating substrate as seen to"- I) Since he is trying to use the fluoro-resin with sufficient mobility in which the melting point is lower than T F E and I T F R, according to this process, there is no opaque portion by un-fusing, and moreover, board thickness accuracy is Towardl. - The laminate sheet for electricity carried out can be obtained. the obtained laminate sheet for electricity -- except for those fabrication nature -- punching processability, moisture resistance, and heat resistance -- it is that whose L Electrical characteristics also improved.

[Brief Description of the Drawings]

It is hail Side view typically about the composition at the time of hail Side view and Drawing 4 building the laminate sheet for electricity in a comparative example for the composition at the time of 1st [ The ] figure~figure 3 building the laminate sheet for electricity in an example typically. 1 [ Takehiko Matsumoto ] ... Resin impregnating substrate 2 ... Film 3 which consists of PFA(s) ... Film representative patent attorney who consists of PTFE(s) G