Summary of the invention
The technical problem to be solved by the present invention is to the shortcomings that overcoming the prior art, provide the production work of high frequency CCL a kind ofSkill, it is easy that this production process is simple, and the hybrid ceramic powder stability used is reliable, and the CCL performance produced is good, meets market needIt asks.
In order to solve the above technical problems, the present invention provides the production technology of high frequency CCL a kind of, following step is specifically includedIt is rapid:
(1) progress of hybrid ceramic powder is pre-dispersed, high speed dispersion is carried out at 1000rpm/min；
Hybrid ceramic powder includes following components by mass percentage: ceramic powder: 10-50%, dispersing agent: 50-70%, surplus areWater；
(2) pre-dispersed liquid that step (1) obtains is added in PTFE emulsion and is stirred again, mixing velocity control exists600rpm/min；
(3) mixture is subjected to glass-fiber-fabric dip forming technology, in which:
Temperature is set when dipping are as follows: 50 DEG C, 70 DEG C, 100 DEG C, 240 DEG C, 340 DEG C, 370 DEG C；
Speed: 1m/min；
Dipping time: glass-fiber-fabric impregnates 2 times；
Upper doses: 166g/ ㎡, wherein 45g/ ㎡ glass-fiber-fabric；
(4) CCL is hot-forming；
The glass-fiber-fabric impregnated sheet of step (3) is hot-forming, finished product CCL is obtained, the size of finished product CCL are as follows:
Long > 100mm, wide 100mm, thick 1mm.
The technical solution that the present invention further limits is:
Further, in the production technology of aforementioned high frequency CCL, ceramic powder is SiO2 in step (1).
In the production technology of aforementioned high frequency CCL, dispersing agent is nonionic surfactant in step (1).
Technical effect needs to exclude cation, solvent and electrolyte since PD is easy the characteristic of demulsification, so selecting non-Ionic surface active agent is avoided that drawbacks described above as dispersing agent.
In the production technology of aforementioned high frequency CCL, powder of scoring in mass ratio in step (1): water=3:23.
In the production technology of aforementioned high frequency CCL, step (2) PTFE emulsion is lotion D210.
In the production technology of aforementioned high frequency CCL, glass-fiber-fabric is 1080 electronics cloths when step (3) glass-fiber-fabric dip forming.
In the production technology of aforementioned high frequency CCL, PTFE emulsion: ceramic powder=4:6 is counted in mass ratio.
In the production technology of aforementioned high frequency CCL, when step (4) is hot-forming, molding pressure is 0-10Mpa, and temperature is0-360 DEG C, molding time 0-79min.
In the production technology of aforementioned high frequency CCL, the CCL substrate D k:2.97, Df:0.002 that produce.
The beneficial effects of the present invention are:
Original process do not have pre-dispersed, directly add ceramic powder in PD mixing, and dispersion is uneven, there is a particle, and the technique of the applicationFirst pre-dispersed, then mixed at high speed adds disperse materials, be uniformly dispersed, and under this technique, stability can be kept 1 month or moreIt does not precipitate.
Embodiment 1
The production technology of high frequency CCL provided in this embodiment a kind of, specifically includes the following steps:
(1) progress of hybrid ceramic powder is pre-dispersed, high speed dispersion is carried out at 1000rpm/min；
Hybrid ceramic powder includes following components by mass percentage: ceramic powder: 10-50%, dispersing agent: 50-70%, surplus areWater；
(2) pre-dispersed liquid that step (1) obtains is added in PTFE emulsion and is stirred again, mixing velocity control exists600rpm/min；
(3) mixture is subjected to glass-fiber-fabric dip forming technology (dip forming uses the prior art), in which:
Temperature is set when dipping are as follows: 50 DEG C, 70 DEG C, 100 DEG C, 240 DEG C, 340 DEG C, 370 DEG C；
Speed: 1m/min；
Dipping time: glass-fiber-fabric impregnates 2 times；
Upper doses: 166g/ ㎡ (glass-fiber-fabric of ㎡ containing 45g/)；Amount of the mixture together with glass-fiber-fabric
(4) CCL is hot-forming；
The glass-fiber-fabric impregnated sheet of step (3) is hot-forming, finished product CCL is obtained, the size of finished product CCL are as follows:
Long > 100mm, wide 100mm, thick 1mm.
In the present embodiment, ceramic powder is SiO2 in step (1).
In the present embodiment, dispersing agent is nonionic surfactant in step (1).
Since PD is easy the characteristic of demulsification, needs to exclude cation, solvent and electrolyte, therefore choose non-ionic surface activeAgent is as dispersing agent.
As a result: 1. being distinguished according to the HLB value of dispersing agent, HLB value can maintain great Jin product preferably steady 10.5 or moreIt is qualitative；
2. HLB value 8.2 is inclined oiliness, immiscible with water, so that it is unable to maintain that the stabilization of mixed liquor, admittedly select non-ionic surfaceActivating agent is as dispersing agent.
In the present embodiment, it scores in mass ratio in step (1) powder: water=3:23.
Dispersing agent does not embody otherness, therefore discusses formula, finds out stability critical point, main to discuss deionized water and dispersionThe additive amount of agent.
As a result: formulation deionised water additive amount is directly proportional to dispersing agent additive amount, simultaneously, it is contemplated that the control of cost, it is excellentFirst select the proportion of a small amount of dispersing agent Yu a small amount of deionized water, in mass ratio score powder: water=3:23.
In the present embodiment, step (2) PTFE emulsion is that lotion D210 is purchased from great Jin fluorination work (China) Co., Ltd.
Morning twilight SFN-1 at present, SFN-1H be had respectively using client using more competitive product in the market Zhejiang China just,The prosperous spirit in Taizhou, Sino-British science and technology, Gauss Bell etc..Morning twilight product lotion is obtained to compare.
As a result: 1. D210 mixing stability is better than morning twilight material；
2. D210 applicable dispersing agent range is wider, when HLB value is greater than 13.3, it is still able to maintain mixing stability, and and morning twilightProduct stability when HLB value is greater than 13.3 is poor.
In the present embodiment, glass-fiber-fabric is 1080 electronics cloths when step (3) glass-fiber-fabric dip forming.
In the present embodiment, PTFE emulsion: ceramic powder=4:6 is counted in mass ratio.
In the present embodiment, when step (4) is hot-forming, molding pressure is 0-10Mpa, and temperature is 0-360 DEG C, moldingTime is 0-79min, as shown in Fig. 1-2.
In the present embodiment, test condition: GB/T 12636-1990
Temperature range: 0~100 DEG C；
Swept frequency range: 7GHz ~ 13GHz；
Test pressure: 350Kg；
Measure the CCL substrate D k:2.97, Df:0.002 produced.
It is hot-forming to be executed by the prior art, the thickness of material requested is such as pressed, by glass-fiber-fabric impregnated sheet laying, is superimposed,It is placed in and hot-forming on vulcanizing press the material is made.
Original process in compared to the prior art, original process do not have it is pre-dispersed, PD mixing when directly add ceramic powder, pointUnevenness is dissipated, has particle, the technique of the application is first pre-dispersed, then mixed at high speed adds disperse materials, is uniformly dispersed, and in this workUnder skill, stability can keep 1 month or more not precipitating；Hybrid ceramic powder of the invention is used to prepare CCL, by dip forming,Hot pressing CCL and Dk, Df test, can meet existing market requirement.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shapeAt technical solution, fall within the scope of protection required by the present invention.