CN104553224B - Manufacturing method of viscous varnished cloth, viscous varnished cloth manufactured with method and copper-clad plate - Google Patents
Manufacturing method of viscous varnished cloth, viscous varnished cloth manufactured with method and copper-clad plate Download PDFInfo
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- CN104553224B CN104553224B CN201410839915.1A CN201410839915A CN104553224B CN 104553224 B CN104553224 B CN 104553224B CN 201410839915 A CN201410839915 A CN 201410839915A CN 104553224 B CN104553224 B CN 104553224B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
- B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
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Abstract
The invention discloses a manufacturing method of viscous varnished cloth. The manufacturing method comprises steps as follows: steeping of glass fiber fabric, drying of the glass fiber fabric, high-temperature sintering, forming of middle varnished cloth, glue coating of the middle varnished cloth, drying of the middle varnished cloth, forming of the viscous varnished cloth and the like. The invention further discloses the viscous varnished cloth manufactured with the method and a copper-clad plate. The copper-clad plate comprises a varnished cloth layer and copper foil covering the varnished cloth layer, wherein the varnished cloth layer is formed by stacking pieces of middle varnished cloth and pieces of the viscous varnished cloth, and the viscous varnished cloth is arranged in the position, contacted with the copper foil, of the varnished cloth layer. The bonding capacity of the viscous varnished cloth manufactured with the manufacturing method and the copper foil is high, the bonding force of the varnished cloth and the copper foil is effectively improved, the peel strength of the varnished cloth and the copper foil can be improved if the viscous varnished cloth is used for manufacturing the copper-clad plate, and the problem of difficult bonding of the varnished cloth and the copper foil is solved.
Description
Technical field
The present invention relates to varnished cloth and copper-clad plate technical field, more particularly to a kind of sticky varnished cloth preparation method, using the party
Sticky varnished cloth and copper-clad plate that method is made.
Background technology
Polytetrafluoroethylene (PTFE) (PTFE) from 1945 by E.I.Du Pont Company's merchandized handling since, due to the unique physics of the material
Performance and chemical property, people just constantly open up application of the material in every field, wherein using the outstanding of PTFE material
Dielectric properties (low-k and low dielectric loss) make the copper-clad plate of frequency applications history for many years.
The preparation method of traditional PTFE copper-clad plates is, with PTFE emulsion impregnated glass fiber cloth, to be made PTFE varnished cloths, so
Several PTFE varnished cloths are overlapped afterwards, and Copper Foil is covered on two sides, finally carry out high temperature lamination, be made PTFE copper-clad plates.But by
It is inert condition in the molecular structure surface after PTFE sintering, it is more difficult directly to be bonded with Copper Foil, therefore is usually at present to use fluorine
Resin film (such as polyfluorinated ethylene membrane) bonds PTFE varnished cloths and Copper Foil as binding agent.The performance of fluorine resin film with
PTFE is close, but fusing point is relatively low, with the bond effect of Copper Foil than the PTFE varnished cloths after sintering more preferably, but the production technology at present
It is more complicated, it is relatively costly.
Chinese patent literature CN201010181737 describes the copper-clad plate that a kind of fluoro-resin mixture makes, program master
If adding a certain proportion of perfluoroethylene-propylene (FEP) in PTFE emulsion, the PTFE emulsion mixture can be less than PTFE
Repeatedly dipping glass-fiber-fabric is obtained varnished cloth, the copper-clad plate combination property suppressed by above-mentioned varnished cloth under the conditions of sintering temperature (330 DEG C)
Well, preparation method process is simple.But, because the sintering temperature of PTFE is higher, if the ratio of perfluoroethylene-propylene is relatively low, paint
Cloth has a certain degree of degumming after less than (330 DEG C) shapings of PTFE sintering temperatures, and this phenomenon is in lower one immersing glue process
It is especially apparent；If improving the ratio of perfluoroethylene-propylene, degumming phenomenon makes moderate progress, but material cost can be higher.
The content of the invention
It is an object of the present invention to：A kind of sticky varnished cloth preparation method is provided, be made with the cementitiousness of Copper Foil compared with
Strong sticky varnished cloth, effectively improves the bonding force of varnished cloth and Copper Foil, solves the problems, such as varnished cloth and Copper Foil bond difficult.
It is another object of the present invention to：The sticky varnished cloth that offer is made up of above-mentioned sticky varnished cloth preparation method.
A further object of the present invention is：A kind of copper-clad plate is provided, by setting sticky varnished cloth, effectively improve varnished cloth with
The peel strength of Copper Foil.
It is that, up to this purpose, the present invention uses following technical scheme：
On the one hand, there is provided a kind of sticky varnished cloth preparation method, at least comprise the following steps：
Varnished cloth in the middle of S10, making：Will glass fabric impregnate fluoro-resin emulsion after be dried, bakee, at high temperature sintering
Reason, and repetition is dried, bakeed, high temperature sintering is processed 3-10 times and obtains middle varnished cloth；
S20, middle varnished cloth cover glue：By middle varnished cloth dipping or fluororesin-coated emulsion, it is ensured that at least one side is covered with fluorine
Resin emulsion；
S30, middle varnished cloth drying：To dipping or fluororesin-coated emulsion after middle varnished cloth be dried and baking at
Reason, removes moisture removal and each analog assistant；
S40, sticky varnished cloth shaping：Middle varnished cloth after order drying processes 1-10min, institute under low-temperature sintering temperature environment
Low-temperature sintering temperature is stated less than 0-80 DEG C of high temperature sintering temperature, dipping or the fluoro-resin emulsion of coating in step S20 is in
Slight sintering or un-sintered state, are made sticky varnished cloth.
Further, the low-temperature sintering temperature is less than 20-60 DEG C of high temperature sintering temperature.
Further, step S10 specifically includes following steps：
S11, glass-fiber-fabric dipping：Glass fabric and fluoro-resin emulsion are provided, glass fabric is impregnated into fluoro-resin emulsion；
S12, glass-fiber-fabric drying：The glass fabric impregnated after fluoro-resin emulsion is dried into 1- under the conditions of 50 DEG C -150 DEG C
10min, removes moisture removal, and 1-10min is then bakeed under the conditions of 200 DEG C -320 DEG C, removes each analog assistant；
S13, high temperature sintering：The glass fabric after drying is set to process 1-10min under the conditions of being in 350 DEG C -400 DEG C, will
Fluoro-resin emulsion sinter molding, is made transition varnished cloth；
S14, intermediate coat molding with cloth：Transition varnished cloth is replaced into glass fabric, S11, S12, S13 step is repeated 3-10 times,
It is made middle varnished cloth；
Further, a kind of sticky varnished cloth preparation method, comprises the following steps：
S11, glass-fiber-fabric dipping：Glass fabric and fluoro-resin emulsion are provided, glass fabric is impregnated into fluoro-resin emulsion；
S12, glass-fiber-fabric drying：The glass fabric impregnated after fluoro-resin emulsion is dried into 1- under the conditions of 50 DEG C -150 DEG C
10min, removes moisture removal, and 1-10min is then bakeed under the conditions of 200 DEG C -320 DEG C, removes each analog assistant；
S13, high temperature sintering：The glass fabric after drying is set to process 1-10min under the conditions of being in 350 DEG C -400 DEG C, will
Fluoro-resin emulsion sinter molding, is made transition varnished cloth；
S14, intermediate coat molding with cloth：Transition varnished cloth is replaced into glass fabric, S11, S12, S13 step is repeated 3-10 times,
It is made middle varnished cloth；
S20, middle varnished cloth cover glue：By middle varnished cloth dipping or fluororesin-coated emulsion, it is ensured that at least one side is covered with fluorine
Resin emulsion；
S30, middle varnished cloth drying：Will impregnate or fluororesin-coated emulsion after middle varnished cloth in 50 DEG C of -150 DEG C of conditions
Under dry 1-10min, remove moisture removal, then bakee 1-10min under the conditions of 200 DEG C -320 DEG C, remove each analog assistant；
S40, sticky varnished cloth shaping：Middle varnished cloth after order drying processes 1-10min under the conditions of being in 320-350 DEG C, makes
The fluoro-resin emulsion for being impregnated in step S20 or being coated is in slight sintering or un-sintered state, is made sticky varnished cloth.
Specifically, a kind of intermediateness of transition varnished cloth, middle varnished cloth representative products in processing procedure, sticky varnished cloth generation
Table is a kind of with the stronger varnished cloth of Copper Foil adhesive power.
Specifically, each analog assistant of removal is bakeed in step S12 and step S30 under the conditions of 200 DEG C -300 DEG C, helps to carry
The process based prediction model stability of fluororesin layer high.
Specifically, in step S14 depending on thickness requirement of the number of times of repeat step S11, S12, S13 according to different varnished cloths,
I.e. depending on requirement of the number of times of transition varnished cloth dipping fluoro-resin emulsion according to different varnished cloths for thickness.
Specifically, the molecular structure of the fluororesin layer of high temperature sintering shaping is in inert condition in step s 13, and surface is glued
Knot ability is weaker, and the surface of the fluororesin layer in slight sintering or un-sintered state for being formed in step s 40 bonds
Ability is remarkably reinforced, and the bond effect when being bonded with Copper Foil is especially apparent.Further, in step s 12, fluorine tree will be impregnated
Glass fabric after fat liquor dries 4-7min under the conditions of 80-120 DEG C, moisture removal is removed, then under the conditions of 250-300 DEG C
4-7min is bakeed, each analog assistant is removed.Further, in step s 13, the glass fabric after drying is made to be in 360-380
4-7min is processed under the conditions of DEG C, by fluoro-resin emulsion sinter molding, transition varnished cloth is made.
Further, in step s 30, will impregnate or fluororesin-coated emulsion after middle varnished cloth in 80-120 DEG C of bar
4-7min is dried under part, moisture removal is removed, 4-7min is then bakeed under the conditions of 280-320 DEG C, remove each analog assistant.Further
Ground, in step s 40, the middle varnished cloth after order drying processes 4-7min under the conditions of being in 330-340 DEG C, makes to be soaked in step S20
Stain or the fluoro-resin emulsion of coating are in slight sintering or un-sintered state, are made sticky varnished cloth.
Further, a fluororesin-coated emulsion in side of the middle varnished cloth.
Only in a fluororesin-coated emulsion in side of the middle varnished cloth, i.e., described sticky varnished cloth only one of which side tool
Have the fluororesin layer in slight sintering or un-sintered state, will have during using the sticky varnished cloth in slightly sintering or
The side of the fluororesin layer of person's un-sintered state bonds with Copper Foil, can improve the adhesion reliability of sticky varnished cloth and Copper Foil, and
The consumption of fluoro-resin emulsion can be saved, production cost is effectively reduced.
Further, whole sides dipping or fluororesin-coated emulsion of the middle varnished cloth.
As a kind of perferred technical scheme, the fluoro-resin emulsion is based on 100 weight portions, including 80-100 parts of PTFE
Emulsion, and 0-20 parts of perfluoroethylene-propylene emulsion FEP, polytetrafluoroethylene (PTFE) perfluoroalkyl vinyl ether emulsion PFA, tetrafluoro second
Any group of one or more in copolymer ETFE, Kynoar PVDF, the polytrifluorochloroethylene PCTFE of alkene and ethene
Close.
As a kind of perferred technical scheme, the fluoro-resin emulsion also includes inorganic filler and diluent, wherein described
Inorganic filler is silica, aluminum oxide, aluminium nitride, boron nitride, titanium dioxide, barium titanate, barium sulfate, talcum powder, hydroxide
Any one in aluminium, lithopone, calcium carbonate, wollastonite, kaolin, shepardite, diatomite, bentonite, silicon powder, ground pumice
Or at least two mixture, the diluent be nonionic surface active agent or distilled water.
Further, the inorganic filler is any one in silica, titanium dioxide, barium titanate or at least two
The mixture planted.Further, the inorganic filler is silica or/and titanium dioxide.
Further, the particle diameter of the inorganic filler is within 12 μm.Further, the particle diameter of the inorganic filler is
Within 8 μm.Yet further, the particle diameter of the inorganic filler is within 5 μm.
Further, the surface of the inorganic filler is processed using coupling agent.Further, the coupling agent is
Coupling agent with vinyl.
Further, the fluoro-resin emulsion be 90 parts PTFE emulsion and 10 parts of perfluoroethylene-propylene emulsion FEP.
Further, the fluoro-resin emulsion is 100 parts of PTFE emulsion and silica.
Further, the fluoro-resin emulsion is 100 parts of PTFE emulsion and distilled water.
Further, the fluoro-resin emulsion is 100 parts of PTFE emulsion.
As a kind of perferred technical scheme, the high temperature sintering temperature is 350 DEG C -400 DEG C, the low-temperature sintering temperature
It is 320 DEG C -350 DEG C.
As a kind of perferred technical scheme, during the middle varnished cloth dipping or fluororesin-coated emulsion, control
The one side thickness of system dipping or the fluororesin layer of coating after moisture removal and auxiliary agent is removed is 3-20 μm.
Specifically, the one side thickness of fluororesin layer is too small, it will cause the sticky varnished cloth to be dropped with the adhesive power of Copper Foil
It is low, but the one side thickness of fluororesin layer is bigger, and drying temperature, stoving temperature and the forming temperature needed in production process are got over
Height, while the drying time for needing, baking time and molding time are more long, production control difficulty is also bigger, so as to cause entirety
Production cost is improved.
Further, one side thickness of the outermost layer fluororesin layer after moisture removal and auxiliary agent is removed is 5~15 μm.
Further, one side thickness of the outermost layer fluororesin layer after moisture removal and auxiliary agent is removed is 10 μm.
On the other hand, a kind of sticky varnished cloth being made up of above-mentioned sticky varnished cloth preparation method, including glass fabric and
If the dried layer fluororesin layer being coated on the outside of glass fabric, the outermost layer fluororesin layer of the sticky varnished cloth is in slight sintering
Or un-sintered state.
Further, middle varnished cloth is made up of step S11, S12, S13 and S14, and the middle varnished cloth includes glass fibre
If cloth and the dried layer fluororesin layer being coated on the outside of glass fabric, the fluororesin layer on the outside of the middle varnished cloth is sintering shape
State.
Specifically, the sticky varnished cloth outermost layer is in the fluororesin layer and Copper Foil of slight sintering or un-sintered state
Adhesive power is stronger, and the fluororesin layer that the middle varnished cloth outermost layer is in sintering state is weaker with the adhesive power of Copper Foil.
But the production process of the middle varnished cloth is simple, low production cost, therefore, it is fully sharp on the basis of using the sticky varnished cloth
With the middle varnished cloth, overall use cost is advantageously reduced.
As a kind of perferred technical scheme, the one side thickness of the outermost layer fluororesin layer of the sticky varnished cloth is 3-20 μ
m。
Another aspect, a kind of copper-clad plate being made up of above-mentioned sticky varnished cloth, including varnished cloth layer, and cover in the varnished cloth
Copper Foil on layer, the position that the varnished cloth layer contact with the Copper Foil be the sticky varnished cloth outermost layer be in slightly sinter or
The fluororesin layer of un-sintered state.
As a kind of perferred technical scheme, the varnished cloth layer is main by some middle varnished cloths and sticky varnished cloth overlapping
Into the side of the varnished cloth layer has covered the Copper Foil, and outermost layer of the varnished cloth layer near the Copper Foil side is sticky paint
Cloth, the sticky varnished cloth outermost layer is in the fluororesin layer and the Copper Foil directly contact of slight sintering or un-sintered state.
Further, the position that the varnished cloth layer contact with the Copper Foil be middle varnished cloth or viscosity varnished cloth or
Any combination of middle varnished cloth and sticky varnished cloth.
Specifically, although the middle varnished cloth outermost layer be in the adhesive power of fluororesin layer and the Copper Foil of sintering state compared with
It is weak, but should be in the fluororesin layer of sintering state can make between middle varnished cloth and between middle varnished cloth and sticky varnished cloth it is real
Existing durable bond.Therefore, the inside of the varnished cloth layer sets the middle varnished cloth, can effectively reduce the entirety of the varnished cloth layer
Cost, while ensureing the bonding effect inside the varnished cloth layer.
As a kind of perferred technical scheme, the middle varnished cloth and the sticky varnished cloth include glass fabric, institute
Glass fabric is stated using electron level alkali-free glass fiber cloth.
Further, the glass fabric uses 106,1080,2116 or 7628 electron level alkali-free glass fiber cloths.
Beneficial effects of the present invention are：A kind of sticky varnished cloth preparation method is provided, is made stronger with the cementitiousness of Copper Foil
Sticky varnished cloth, effectively improve the bonding force of varnished cloth and Copper Foil, solve the problems, such as varnished cloth and Copper Foil bond difficult.There is provided by upper simultaneously
State the sticky varnished cloth that sticky varnished cloth preparation method is made.The present invention also provides a kind of copper-clad plate, by setting sticky varnished cloth, effectively
Improve the peel strength of varnished cloth and Copper Foil.
Brief description of the drawings
The present invention is described in further detail below according to drawings and Examples.
Fig. 1 is the flow chart of the sticky varnished cloth preparation method according to one embodiment of the invention；
Fig. 2 is the cross-sectional view of the copper-clad plate according to first embodiment of the invention；
Fig. 3 is the cross-sectional view of the copper-clad plate according to third embodiment of the invention；
Fig. 4 is the cross-sectional view of the copper-clad plate according to fourth embodiment of the invention.
In Fig. 2 to Fig. 4：
1st, middle varnished cloth；2nd, sticky varnished cloth；3rd, Copper Foil.
Specific embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by specific embodiment.
Fig. 1 is the flow chart of the sticky varnished cloth preparation method provided according to one embodiment of the invention.As shown in figure 1, in this
In embodiment, sticky varnished cloth preparation method is comprised the following steps：S11, glass-fiber-fabric dipping：Glass fabric and fluororesin breast are provided
Liquid, fluoro-resin emulsion is impregnated by glass fabric；S12, glass-fiber-fabric drying：The glass fabric impregnated after fluoro-resin emulsion is existed
1-10min is dried under the conditions of 50 DEG C -150 DEG C, moisture removal is removed, then 1-10min is bakeed under the conditions of 200 DEG C -320 DEG C, removed
Each analog assistant；S13, high temperature sintering：The glass fabric after drying is set to process 1-10min under the conditions of being in 350 DEG C -400 DEG C, will
Fluoro-resin emulsion sinter molding, is made transition varnished cloth；S14, intermediate coat molding with cloth：Transition varnished cloth is replaced into glass fabric, weight
Multiple S11, S12, S13 step 3-10 times, is made middle varnished cloth；S20, middle varnished cloth cover glue：Middle varnished cloth is impregnated or coated
Fluoro-resin emulsion, it is ensured that at least one side is covered with fluoro-resin emulsion；S30, middle varnished cloth drying：Will dipping or fluororesin-coated breast
Middle varnished cloth after liquid dries 1-10min under the conditions of 50 DEG C -150 DEG C, removes moisture removal, then under the conditions of 200 DEG C -320 DEG C
1-10min is bakeed, each analog assistant is removed；S40, sticky varnished cloth shaping：Middle varnished cloth after order drying is in 320-350 DEG C of condition
Lower treatment 1-10min, makes dipping or the fluoro-resin emulsion of coating in step S20 be in slight sintering or un-sintered state,
It is made sticky varnished cloth.
Embodiments of the invention additionally provide sticky varnished cloth product, and the sticky varnished cloth is combined with of the invention a kind of or many
Plant the production of varnished cloth preparation method.The sticky varnished cloth be used to make copper-clad plate, and the copper-clad plate includes varnished cloth and Copper Foil, thus makes
Copper-clad plate varnished cloth it is high with the peel strength of copper foil layer.
Fluoro-resin emulsion of the invention is based on 100 weight portions, including 80-100 parts of PTFE emulsion, and 0-20 parts poly-
The copolymer of perfluoroethylene-propylene (copolymer) emulsion FEP, polytetrafluoroethylene (PTFE) perfluoroalkyl vinyl ether emulsion PFA, tetrafluoroethene and ethene
One or more in ETFE, Kynoar PVDF, polytrifluorochloroethylene PCTFE of any combination.The fluoro-resin emulsion
Also include inorganic filler and diluent, wherein the inorganic filler is silica, aluminum oxide, aluminium nitride, boron nitride, titanium dioxide
It is titanium, barium titanate, barium sulfate, talcum powder, aluminium hydroxide, lithopone, calcium carbonate, wollastonite, kaolin, shepardite, diatomite, swollen
Profit soil, silicon powder, in ground pumice any one or at least two mixture, the surface of the inorganic filler uses and carries
The coupling agent of vinyl is processed, and the particle diameter of the inorganic filler is within 12 μm.The diluent is non-ionic surface
Activating agent or distilled water.
Fig. 2 is the cross-sectional view of copper-clad plate described according to a first embodiment of the present invention.As shown in Fig. 2 in
In one embodiment, method for manufacturing cover clad laminate of the invention is as follows：
The 1st, Copper Foil and glass fabric are provided, and prepare fluoro-resin emulsion
The Copper Foil of the 1oz that Copper Foil is provided using Suzhou Feitian.Glass fabric uses 1080 electron level alkali-free glass fibres
Cloth.Fluoro-resin emulsion is based on 100 weight portions, including 95 parts of PTFE emulsion and 5 parts of perfluoroethylene-propylene emulsion FEP.Fluorine tree
Fat liquor adjusts solids content and viscosity using nonionic surface active agent, and the solids content for making fluoro-resin emulsion is 35-
60%, viscosity is 15-40mPas (under the conditions of 20 DEG C).
2nd, varnished cloth in the middle of preparing
1080 electron level alkali-free glass fiber cloths are impregnated using above-mentioned fluoro-resin emulsion, makes all surfaces of glass fabric
It is covered with the fluoro-resin emulsion；Then the glass fabric impregnated after fluoro-resin emulsion is dried into 3- under the conditions of 80-120 DEG C
4min, removes moisture removal, and 4-5min is bakeed under the conditions of 290-310 DEG C, removes the auxiliary agent of all kinds of low temperature volatilizations；Then after making drying
Glass fabric be in 360-380 DEG C under the conditions of process 3-4min, by fluoro-resin emulsion sinter molding, be made transition varnished cloth；
Transition varnished cloth is finally replaced into glass fabric, is repeated the above steps 5 times, be made the middle varnished cloth that thickness is 70-80 μm.
3rd, sticky varnished cloth is prepared
Middle varnished cloth is impregnated using above-mentioned fluoro-resin emulsion, all surfaces of middle varnished cloth is covered with the fluoro-resin emulsion；
Then the middle varnished cloth impregnated after fluoro-resin emulsion is dried into 3-4min under the conditions of 80-120 DEG C, moisture removal is removed, in 290-310
4-5min is bakeed under the conditions of DEG C, the auxiliary agent of all kinds of low temperature volatilizations is removed；Middle varnished cloth after finally order drying is in 330-340 DEG C
Under the conditions of process 3-4min, this fluoro-resin emulsion for impregnating is in slight sintering or un-sintered state, and control this
The thickness of the fluororesin layer being covered with is 5-10 μm, is made sticky varnished cloth.
4th, copper-clad plate is prepared
Structure for covering copper plate shown in reference picture 2, varnished cloth in the middle of 12 pieces is superimposed together, and at 12 blocks the two of middle varnished cloth
The each sticky varnished cloth of one block of laminating in side, forms varnished cloth layer, is then fitted respectively one block of Copper Foil of 1oz in the both sides of varnished cloth layer,
360-380 DEG C/2-5h, pressure is made copper-clad plate to be laminated under conditions of 50-100kg/cm2.
First comparative example is corresponding with the first embodiment of the present invention, and the copper-clad plate of the first comparative example uses traditional fabrication side
Method, it is specific as follows：
The 1st, Copper Foil and glass fabric are provided, and prepare fluoro-resin emulsion.
The Copper Foil of the 1oz that Copper Foil is provided using Suzhou Feitian.Glass fabric uses 1080 electron level alkali-free glass fibres
Cloth.Fluoro-resin emulsion is based on 100 weight portions, including 95 parts of PTFE emulsion and 5 parts of perfluoroethylene-propylene emulsion FEP.Fluorine tree
Fat liquor adjusts solids content and viscosity using nonionic surface active agent, and the solids content for making fluoro-resin emulsion is 35-
60%, viscosity is 15-40mPas (under the conditions of 20 DEG C).
2nd, varnished cloth in the middle of preparing
1080 electron level alkali-free glass fiber cloths are impregnated using above-mentioned fluoro-resin emulsion, makes all surfaces of glass fabric
It is covered with the fluoro-resin emulsion；Then the glass fabric impregnated after fluoro-resin emulsion is dried into 3- under the conditions of 80-120 DEG C
4min, removes moisture removal, and 4-5min is bakeed under the conditions of 290-310 DEG C, removes the auxiliary agent of all kinds of low temperature volatilizations；Then after making drying
Glass fabric be in 360-380 DEG C under the conditions of process 3-4min, by fluoro-resin emulsion sinter molding, be made transition varnished cloth；
Transition varnished cloth is finally replaced into glass fabric, is repeated the above steps 5 times, be made the middle varnished cloth that thickness is 70-80 μm.
3rd, copper-clad plate is prepared
Varnished cloths in the middle of 14 pieces are superimposed together, varnished cloth layer is formed, then fitted respectively one piece of 1oz in the both sides of varnished cloth layer
Copper Foil, in 360-380 DEG C/2-5h, pressure is to be laminated under conditions of 50-100kg/cm2, is made copper-clad plate.
Two kinds of copper-clad plates being made in first embodiment and the first comparative example are carried out into varnished cloth layer and peel strength of copper foil
Contrast experiment, it is as a result as follows：
Peel strength of copper foil during the copper-clad plate with sticky varnished cloth being made in first embodiment is tested at four times is distinguished
It is 1.72,1.69,1.75,1.8, average value is 1.74, the Copper Foil of copper-clad plate for being all higher than being made in the first comparative example is peeled off strong
Degree, it can be seen that, the varnished cloth layer of the copper-clad plate that the inventive method makes is high with copper foil layer peel strength.
The second embodiment of the present invention and the second comparative example respectively by the Copper Foil in first embodiment and the first comparative example more
The Copper Foil of the 1oz of Luxembourg's offer is provided, two kinds of copper-clad plates is respectively prepared, and carry out the contrast of varnished cloth layer and peel strength of copper foil
Experiment, it is as a result as follows：
Peel strength of copper foil during the copper-clad plate with sticky varnished cloth being made in second embodiment is tested at four times is distinguished
It is 3.2,3.1,3.24,3.27, average value is 3.2, is all higher than the peel strength of copper foil of copper-clad plate being made in the second comparative example,
As can be seen here, preparation method of the invention can improve the varnished cloth layer and copper foil layer peel strength of copper-clad plate.
Fig. 3 is the cross-sectional view of copper-clad plate described according to a third embodiment of the present invention.As shown in figure 3, this reality
The preparation method for applying the copper-clad plate of example is as follows：
The 1st, Copper Foil and glass fabric are provided, and prepare fluoro-resin emulsion
The Copper Foil of the 1oz that Copper Foil is provided using Suzhou Feitian.Glass fabric uses 106 electron level alkali-free glass fibres
Cloth.Fluoro-resin emulsion is based on 100 weight portions, including 100 parts of PTFE emulsion and silica.Fluoro-resin emulsion uses nonionic
Type surfactant adjusts solids content and viscosity, makes the solids content of fluoro-resin emulsion for 40-65%, and viscosity is 20-
45mPas (under the conditions of 20 DEG C).
2nd, varnished cloth in the middle of preparing
106 electron level alkali-free glass fiber cloths are impregnated using above-mentioned fluoro-resin emulsion, makes all surfaces of glass fabric
It is covered with the fluoro-resin emulsion；Then the glass fabric impregnated after fluoro-resin emulsion is dried into 1- under the conditions of 50-100 DEG C
3min, removes moisture removal, and 3-4min is bakeed under the conditions of 250-300 DEG C, removes the auxiliary agent of all kinds of low temperature volatilizations；Then after making drying
Glass fabric be in 350-370 DEG C under the conditions of process 1-3min, by fluoro-resin emulsion sinter molding, be made transition varnished cloth；
Transition varnished cloth is finally replaced into glass fabric, is repeated the above steps 5 times, be made the middle varnished cloth that thickness is 70-80 μm.
3rd, sticky varnished cloth is prepared
Middle varnished cloth is impregnated using above-mentioned fluoro-resin emulsion, all surfaces of middle varnished cloth is covered with the fluoro-resin emulsion；
Then the middle varnished cloth impregnated after fluoro-resin emulsion is dried into 1-3min under the conditions of 50-100 DEG C, moisture removal is removed, in 250-300
3-4min is bakeed under the conditions of DEG C, the auxiliary agent of all kinds of low temperature volatilizations is removed；Middle varnished cloth after finally order drying is in 320-330 DEG C
Under the conditions of process 1-3min, this fluoro-resin emulsion for impregnating is in slight sintering or un-sintered state, and control this
The thickness of the fluororesin layer being covered with is 3-5 μm, is made sticky varnished cloth.
4th, copper-clad plate is prepared
Structure for covering copper plate shown in reference picture 3, varnished cloth in the middle of 6 pieces and 5 blocks of sticky varnished cloths are superimposed and staggered, and
The sticky varnished cloth of each one block of the laminating in 11 pieces of both sides of varnished cloth, forms varnished cloth layer, is then fitted respectively one piece in the both sides of varnished cloth layer
The Copper Foil of 1oz, in 360-380 DEG C/2-5h, pressure is made copper-clad plate to be laminated under conditions of 50-100kg/cm2.
Fig. 4 is the cross-sectional view of copper-clad plate described according to a fourth embodiment of the present invention.As shown in figure 4, this reality
The preparation method for applying the copper-clad plate of example is as follows：
The 1st, Copper Foil and glass fabric are provided, and prepare fluoro-resin emulsion
The Copper Foil of the 1oz that Copper Foil is provided using Suzhou Feitian.Glass fabric uses 7628 electron level alkali-free glass fibres
Cloth.Fluoro-resin emulsion is based on 100 weight portions, including 100 parts of PTFE emulsion.Fluoro-resin emulsion is contained using distilled water regulation solid
Amount and viscosity, make the solids content of fluoro-resin emulsion for 35-60%, and viscosity is 15-40mPas (under the conditions of 20 DEG C).
2nd, varnished cloth in the middle of preparing
7628 electron level alkali-free glass fiber cloths are impregnated using above-mentioned fluoro-resin emulsion, makes all surfaces of glass fabric
It is covered with the fluoro-resin emulsion；Then the glass fabric impregnated after fluoro-resin emulsion is dried into 4- under the conditions of 90-130 DEG C
6min, removes moisture removal, and 6-7min is bakeed under the conditions of 290-320 DEG C, removes the auxiliary agent of all kinds of low temperature volatilizations；Then after making drying
Glass fabric be in 370-390 DEG C under the conditions of process 4-6min, by fluoro-resin emulsion sinter molding, be made transition varnished cloth；
Transition varnished cloth is finally replaced into glass fabric, is repeated the above steps 5 times, be made the middle varnished cloth that thickness is 70-80 μm.
3rd, sticky varnished cloth is prepared
Middle varnished cloth is impregnated using above-mentioned fluoro-resin emulsion, all surfaces of middle varnished cloth is covered with the fluoro-resin emulsion；
Then the middle varnished cloth impregnated after fluoro-resin emulsion is dried into 4-6min under the conditions of 90-130 DEG C, moisture removal is removed, in 290-320
6-7min is bakeed under the conditions of DEG C, the auxiliary agent of all kinds of low temperature volatilizations is removed；Middle varnished cloth after finally order drying is in 330-340 DEG C
Under the conditions of process 4-6min, this fluoro-resin emulsion for impregnating is in slight sintering or un-sintered state, and control this
The thickness of the fluororesin layer being covered with is 10-15 μm, is made sticky varnished cloth.
4th, copper-clad plate is prepared
Structure for covering copper plate shown in reference picture 4, varnished cloth in the middle of 7 blocks of sticky varnished cloths and 6 pieces is superimposed and staggered, and is formed
Varnished cloth layer, then in one block of Copper Foil of 1oz of side laminating of varnished cloth layer, in 360-380 DEG C/2-5h, pressure is 50-100kg/
It is laminated under conditions of cm2, is made copper-clad plate.
In description of the invention, it is to be understood that term " first ", " second ", " the 3rd ", " the 4th " is used only for
It is distinguish between in description, not special implication.
It is to be understood that, above-mentioned specific embodiment is only former presently preferred embodiments of the present invention and institute's application technology
Reason, in technical scope disclosed in this invention, change that any one skilled in the art is readily apparent that or
Replace, should all cover within the scope of the present invention.
Claims (10)
1. a kind of sticky varnished cloth preparation method, it is characterised in that at least comprise the following steps：
Varnished cloth in the middle of S10, making：It is dried after glass fabric is impregnated into fluoro-resin emulsion, bakeed, high temperature sintering is processed,
And repetition is dried, bakeed, high temperature sintering is processed 3-10 times and obtains middle varnished cloth；
S20, middle varnished cloth cover glue：By middle varnished cloth dipping or fluororesin-coated emulsion, it is ensured that at least one side is covered with fluororesin
Emulsion；
S30, middle varnished cloth drying：Middle varnished cloth after dipping or fluororesin-coated emulsion is dried and baking treatment,
Remove moisture removal and each analog assistant；
S40, sticky varnished cloth shaping：Middle varnished cloth after order drying processes 1-10min under low-temperature sintering temperature environment, described low
Warm sintering temperature is less than 0-80 DEG C of high temperature sintering temperature, is in dipping or the fluoro-resin emulsion of coating in step S20 slight
Sintering or un-sintered state, are made sticky varnished cloth.
2. sticky varnished cloth preparation method according to claim 1, it is characterised in that the fluoro-resin emulsion presses 100 weight
Part meter, including 80-100 parts of PTFE emulsion, and 0-20 parts of perfluoroethylene-propylene emulsion FEP, polytetrafluoroethylene (PTFE) perfluor alkane
Copolymer ETFE, Kynoar PVDF, the polytrifluorochloroethylene PCTFE of base vinyl ethers emulsion PFA, tetrafluoroethene and ethene
In one or more of any combination.
3. sticky varnished cloth preparation method according to claim 2, it is characterised in that the fluoro-resin emulsion also includes inorganic
Filler and diluent, wherein the inorganic filler be silica, aluminum oxide, aluminium nitride, boron nitride, titanium dioxide, barium titanate,
Barium sulfate, talcum powder, aluminium hydroxide, lithopone, calcium carbonate, wollastonite, kaolin, shepardite, diatomite, bentonite, silicon are micro-
In powder, ground pumice any one or at least two mixture, the diluent be nonionic surface active agent or steaming
Distilled water.
4. sticky varnished cloth preparation method according to claim 1, it is characterised in that the high temperature sintering temperature is 350 DEG C-
400 DEG C, the low-temperature sintering temperature is 320 DEG C -350 DEG C.
5. the sticky varnished cloth preparation method according to any one of Claims 1-4, it is characterised in that in the middle varnished cloth
During dipping or fluororesin-coated emulsion, the one side of dipping or the fluororesin layer of coating after moisture removal and auxiliary agent is removed is controlled
Thickness is 3-20 μm.
6. a kind of sticky varnished cloth, it is characterised in that by the sticky varnished cloth preparation method system described in any one of claim 1 to 5
Into if sticky varnished cloth includes glass fabric and the dried layer fluororesin layer being coated on the outside of glass fabric, the sticky varnished cloth
Outermost layer fluororesin layer be in slight sintering or un-sintered state.
7. sticky varnished cloth according to claim 6, it is characterised in that the list of the outermost layer fluororesin layer of the sticky varnished cloth
Face thickness is 3-20 μm.
8. the copper-clad plate that a kind of sticky varnished cloth as described in claim 6 or 7 is made, it is characterised in that including varnished cloth layer, and
The Copper Foil on varnished cloth layer is covered, the position that the varnished cloth layer is contacted with the Copper Foil is at the sticky varnished cloth outermost layer
In slight sintering or the fluororesin layer of un-sintered state.
9. copper-clad plate according to claim 8, it is characterised in that the varnished cloth layer is main by some middle varnished cloths and viscosity
Varnished cloth is formed by stacking, and the side of the varnished cloth layer has covered the Copper Foil, outermost of the varnished cloth layer near the Copper Foil side
Layer is sticky varnished cloth, and the sticky varnished cloth outermost layer is in slight sintering or the fluororesin layer of un-sintered state is straight with the Copper Foil
Contact.
10. copper-clad plate according to claim 9, it is characterised in that the middle varnished cloth and the sticky varnished cloth include
Glass fabric, the glass fabric uses electron level alkali-free glass fiber cloth.
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| CN105572947A (en) * | 2016-03-18 | 2016-05-11 | 京东方科技集团股份有限公司 | Array base plate and manufacturing method thereof as well as display device |
| CN105862395B (en) * | 2016-04-28 | 2018-01-16 | 江苏富仕德科技发展有限公司 | High thermal conductivity coefficient glass fabric and its manufacture method |
| CN106274007B (en) * | 2016-07-30 | 2018-12-25 | 龙宇电子(梅州)有限公司 | Preparation method for multilayer printed wiring board and the cushion of copper-clad plate process for pressing |
| CN107385936B (en) * | 2017-07-12 | 2019-12-17 | 广东生益科技股份有限公司 | method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, PTFE varnished cloth prepared by method and metal foil-clad laminated board |
| CN112248595A (en) * | 2020-09-22 | 2021-01-22 | 瑞声新能源发展(常州)有限公司科教城分公司 | Insulating plate and preparation method thereof, laminated plate and preparation method and application thereof |
| CN112223868B (en) * | 2020-09-22 | 2022-01-07 | 瑞声新能源发展(常州)有限公司科教城分公司 | Insulating plate and preparation method thereof, laminated plate and preparation method and application thereof |
| CN112519357A (en) * | 2020-11-30 | 2021-03-19 | 瑞声新能源发展(常州)有限公司科教城分公司 | Method for producing flexible insulating plate, flexible insulating plate obtained by the method, flexible laminated board, method for producing the flexible laminated board, and application of the flexible laminated board |
| CN114179461A (en) * | 2021-11-08 | 2022-03-15 | 安徽鸿海新材料股份有限公司 | Glass fiber cloth reinforced copper-clad plate and preparation method thereof |
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| CN101857708B (en) * | 2010-05-21 | 2011-11-30 | 广东生益科技股份有限公司 | Fluoro-resin mixture, copper-clad plate made of same and making method thereof |
| CN102166852A (en) * | 2010-12-31 | 2011-08-31 | 广东生益科技股份有限公司 | Preparation method of PTFE (polytetrafluoroethylene) copper-clad plate with high elastic modulus |
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