CN113276454A - Preparation method of flame-retardant copper-clad plate - Google Patents
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- CN113276454A CN113276454A CN202110433851.5A CN202110433851A CN113276454A CN 113276454 A CN113276454 A CN 113276454A CN 202110433851 A CN202110433851 A CN 202110433851A CN 113276454 A CN113276454 A CN 113276454A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/12—Compression moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/105—Coating or impregnating independently of the moulding or shaping step of reinforcement of definite length with a matrix in solid form, e.g. powder, fibre or sheet form
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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Abstract
The invention provides a preparation method of a flame-retardant copper-clad plate, and relates to the technical field of copper-clad plates. The preparation method of the flame-retardant copper-clad plate comprises the following steps: s1, preparing a flame retardant: adding polypropylene, chlorinated paraffin and vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 180-200 ℃, drying after melting, crushing and sieving to obtain the flame-retardant powder. According to the preparation method of the flame-retardant copper-clad plate, the flame-retardant layer is arranged, so that the high-temperature resistance of the copper-clad plate is greatly improved, and the heat generated by the work of part of the copper-clad plate is blocked, so that the heat resistance and the safety performance of the whole equipment are improved, the phenomenon of softening is avoided, the stability and the reliability of the equipment in the using process are ensured, the process is simple and environment-friendly in the dipping bath process, the copper-clad plate is convenient to process, the cost is reduced, and the practicability is increased.
Description
Technical Field
The invention relates to the technical field of copper-clad plates, in particular to a preparation method of a flame-retardant copper-clad plate.
Background
In the copper-clad plate preparation technology in the prior art, the resin layer has poor high-temperature resistance, so that the phenomenon of softening is easy to occur, the copper-clad plate is easy to burn out at high temperature, and on the other hand, the anti-torsion performance of the existing resin agent is poor, and the process is complex and the smell is unpleasant in the dipping bath process, so that the performance of the copper-clad plate is not high, and the practicability is not high.
In order to solve the problems, the inventor provides a preparation method of a flame-retardant copper-clad plate, which greatly improves the high-temperature resistance of the copper-clad plate and blocks heat generated by the working of part of the copper-clad plate by arranging a flame-retardant layer, thereby improving the heat resistance and the safety of the whole equipment, avoiding the softening phenomenon, ensuring the stability and the reliability of the equipment in the using process, having simple process and high environmental protection in the dipping bath process, facilitating the processing of the copper-clad plate, reducing the cost and increasing the practicability.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the preparation method of the flame-retardant copper-clad plate, which has the advantages of high practicability and high reliability and solves the problems of low practicability and low reliability.
(II) technical scheme
In order to achieve the purposes of high practicability and high reliability, the invention is realized by the following technical scheme: the preparation method of the flame-retardant copper-clad plate comprises the following steps:
s1, preparing a flame retardant: adding polypropylene, chlorinated paraffin and vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 180-200 ℃, drying after melting, crushing and sieving to obtain flame retardant powder;
s2, preparing epoxy modified resin: mixing flame-retardant powder with epoxy resin, continuously adding modified aluminum hydroxide powder and ceramic zinc borate, stirring for 20min at 60 ℃ in a heating reaction device, continuously heating to 80 ℃, continuously stirring for reaction for 1h to obtain a modified epoxy resin prepolymer, continuously adding m-phenylenediamine and alicyclic polyamine, curing for 1-3h at 80-110 ℃, checking the curing condition, and continuously curing for 2-6h at 120-180 ℃ to obtain a flame-retardant epoxy resin material;
s3, manufacturing a substrate: uniformly mixing glass fibers and polypropylene fibers to obtain a mixed fiber material, and cutting the mixed fiber material into corresponding sizes after hot pressing and cold pressing to obtain glass fiber cloth;
s4, coating: soaking glass fiber cloth in the flame-retardant epoxy resin material glue solution to obtain a prepreg, drying the prepreg, and drying for 1min at the temperature of 160 ℃;
s5, superposition: copper foils were stacked on both sides of the prepreg sheet by N2Hot pressing at 28-35MPa and 170 ℃ for 70-90min, cooling, setting the temperature at 60-90 ℃ for 35-55min by a polishing and glue removing device, rechecking the conditions of plate surface residual glue and star point residual glue, and polishing the residual glue.
Preferably, the volume of the polypropylene in the step S1 is 89-94 wt%, the volume of the chlorinated paraffin is 1-3 wt%, and the volume of the vinyl phosphite is 5-8 wt%, so that the flame retardance is facilitated and the heat resistance is improved.
Preferably, the average particle diameter of the flame-retardant powder in the step S1 is 0.1 to 20 μm, thereby allowing the flame-retardant powder to be easily mixed.
Preferably, in the step S2, the mass ratio of the flame-retardant powder to the epoxy resin to the modified aluminum hydroxide powder to the ceramic zinc borate is 1: 2: (4-6): therefore, the environmental protection is improved by modifying the aluminum hydroxide powder and the ceramized zinc borate.
Preferably, in the step S3, the mass ratio of the glass fibers to the polypropylene fibers is 1: 2-1: 3, therefore, the flame retardancy is improved by the polypropylene fiber.
Preferably, in the step S4, the amount of the glue solution of the flame-retardant epoxy resin material is 127g/m2The gel content is controlled to be 50 +/-1%, the fluidity is controlled to be 10 +/-1%, the volatile matter is less than or equal to 3.5%, and the thickness of the flame-retardant layer is 0.05-0.06 mm.
Preferably, the glue removing speed in the step S5 is 0.2-0.4mg/cm2。
(III) advantageous effects
Compared with the prior art, the invention provides a preparation method of a flame-retardant copper-clad plate, which has the following beneficial effects:
1. according to the preparation method of the flame-retardant copper-clad plate, the flame-retardant layer is arranged, so that the high-temperature resistance of the copper-clad plate is greatly improved, and part of heat generated by the work of the copper-clad plate is blocked, so that the heat resistance and safety performance of the whole equipment are improved, the phenomenon of softening is avoided, and the stability and reliability of the equipment in the using process are ensured.
2. According to the preparation method of the flame-retardant copper-clad plate, the glass fiber and the polypropylene fiber are uniformly mixed, so that the substrate material has high thermal conductivity, high insulativity and electric breakdown strength, the copper-clad plate is not easy to burn out at high temperature, the process is simple in dipping bath process, the environmental protection performance is high, the copper-clad plate is convenient to process, and the cost is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is further described below by way of examples:
the first embodiment is as follows:
the preparation method of the flame-retardant copper-clad plate comprises the following steps:
s1, preparing a flame retardant: adding 89 wt% of polypropylene, 1 wt% of chlorinated paraffin and 5 wt% of vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 180 ℃, drying after melting, crushing, and sieving to obtain flame-retardant powder with the average particle size of 0.1 mu m;
s2, preparing epoxy modified resin: mixing the flame-retardant powder with the epoxy resin, continuously adding the modified aluminum hydroxide powder and the ceramic zinc borate, wherein the mass ratio of the flame-retardant powder to the epoxy resin to the modified aluminum hydroxide powder to the ceramic zinc borate is 1: 2: 4: 1, stirring for 20min at 60 ℃ in a heating reaction device, continuously heating to 80 ℃, continuously stirring for reaction for 1h to obtain a modified epoxy resin prepolymer, continuously adding m-phenylenediamine and alicyclic polyamine, curing for 1h at 80 ℃, checking the curing condition, and continuously curing for 2h at 120 ℃ to obtain a flame-retardant epoxy resin material;
s3, manufacturing a substrate: mixing glass fiber and polypropylene fiber according to the mass ratio of 1:2, mixing to obtain a mixed fiber material, and cutting the mixed fiber material into corresponding sizes after hot pressing and cold pressing to obtain glass fiber cloth;
s4, coating: soaking glass fiber cloth in flame-retardant epoxy resin material glue solution to obtain a prepreg, drying the prepreg, wherein the using amount of the flame-retardant epoxy resin material glue solution is 127g/m2Drying for 1min at 160 ℃, controlling the gel content to be 50%, the fluidity to be 10%, the volatile matter to be 3.5%, and the thickness of the flame-retardant layer to be 0.05 mm;
s5, superposition: copper foils were stacked on both sides of the prepreg sheet by N2Hot pressing at 28MPa and 160 deg.C for 70min, cooling, and polishing to remove glue at 60 deg.C for 35-55min at a speed of 0.2mg/cm2And the conditions of plate surface residual glue and star point residual glue are reviewed, and the residual glue is polished.
Example two:
s1, preparing a flame retardant: adding 90 wt% of polypropylene, 2 wt% of chlorinated paraffin and 6 wt% of vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 190 ℃, drying after melting, crushing, and sieving to obtain flame-retardant powder with average particle size of 10 μm;
s2, preparing epoxy modified resin: mixing the flame-retardant powder with the epoxy resin, continuously adding the modified aluminum hydroxide powder and the ceramic zinc borate, wherein the mass ratio of the flame-retardant powder to the epoxy resin to the modified aluminum hydroxide powder to the ceramic zinc borate is 1: 2: 5: 1, stirring for 20min at 60 ℃ in a heating reaction device, continuously heating to 80 ℃, continuously stirring for reaction for 1h to obtain a modified epoxy resin prepolymer, continuously adding m-phenylenediamine and alicyclic polyamine, curing for 2h at 100 ℃, checking the curing condition, and continuously curing for 4h at 150 ℃ to obtain a flame-retardant epoxy resin material;
s3, manufacturing a substrate: mixing glass fiber and polypropylene fiber according to the mass ratio of 1:2, mixing to obtain a mixed fiber material, and cutting the mixed fiber material into corresponding sizes after hot pressing and cold pressing to obtain glass fiber cloth;
s4, coating: soaking glass fiber cloth in flame-retardant epoxy resin material glue solution to obtain a prepreg, drying the prepreg, wherein the using amount of the flame-retardant epoxy resin material glue solution is 127g/m2Drying for 1min at 160 ℃, controlling the gel content to be 50.5%, the fluidity to be 10.5%, the volatile matter to be 2%, and controlling the thickness of the flame-retardant layer to be 0.06 mm;
s5, superposition: copper foils were stacked on both sides of the prepreg sheet by N2Hot pressing at 30MPa and 165 deg.C for 80min, cooling, and removing glue by polishing at 80 deg.C for 35-55min at a speed of 0.3mg/cm2And the conditions of plate surface residual glue and star point residual glue are reviewed, and the residual glue is polished.
Example three:
s1, preparing a flame retardant: adding 94 wt% of polypropylene, 3 wt% of chlorinated paraffin and 8 wt% of vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 200 ℃, drying after melting, crushing, and sieving to obtain flame-retardant powder with the average particle size of 20 mu m;
s2, preparing epoxy modified resin: mixing the flame-retardant powder with the epoxy resin, continuously adding the modified aluminum hydroxide powder and the ceramic zinc borate, wherein the mass ratio of the flame-retardant powder to the epoxy resin to the modified aluminum hydroxide powder to the ceramic zinc borate is 1: 2: 6: 1, stirring for 20min at 60 ℃ in a heating reaction device, continuously heating to 80 ℃, continuously stirring for reaction for 1h to obtain a modified epoxy resin prepolymer, continuously adding m-phenylenediamine and alicyclic polyamine, curing for 3h at 110 ℃, checking the curing condition, and continuously curing for 6h at 180 ℃ to obtain a flame-retardant epoxy resin material;
s3, manufacturing a substrate: mixing glass fiber and polypropylene fiber according to the mass ratio of 1: 3, mixing to obtain a mixed fiber material, and cutting the mixed fiber material into corresponding sizes after hot pressing and cold pressing to obtain glass fiber cloth;
s4, coating: soaking glass fiber cloth in flame-retardant epoxy resin material glue solution to obtain a prepreg, drying the prepreg, wherein the using amount of the flame-retardant epoxy resin material glue solution is 127g/m2Drying for 1min at 160 ℃, controlling the gel content to be 51%, the fluidity to be 11%, the volatile matter to be 1% and the thickness of the flame-retardant layer to be 0.06 mm;
s5, superposition: copper foils were stacked on both sides of the prepreg sheet by N2Hot pressing at 35MPa and 170 deg.C for 90min, cooling, and passing through polishing and degumming device at 90 deg.C for 35-55min at degumming speed of 0.4mg/cm2And the conditions of plate surface residual glue and star point residual glue are reviewed, and the residual glue is polished.
In conclusion, according to the preparation method of the flame-retardant copper-clad plate, the flame-retardant layer is arranged, so that the high-temperature resistance of the copper-clad plate is greatly improved, and heat generated by the work of part of the copper-clad plate is blocked, so that the heat resistance and the safety performance of the whole equipment are improved, the phenomenon of softening is avoided, and the stability and the reliability of the equipment in the use process are ensured.
According to the preparation method of the flame-retardant copper-clad plate, the glass fiber and the polypropylene fiber are uniformly mixed, so that the substrate material has high thermal conductivity, high insulativity and electric breakdown strength, the copper-clad plate is not easy to burn out at high temperature, the process is simple in dipping bath process, the environmental protection performance is high, the copper-clad plate is convenient to process, and the cost is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The preparation method of the flame-retardant copper-clad plate comprises the following steps of:
s1, preparing a flame retardant: adding polypropylene, chlorinated paraffin and vinyl phosphite into a reaction vessel, stirring and mixing, placing in a heating reaction device, melting at 180-200 ℃, drying after melting, crushing and sieving to obtain flame retardant powder;
s2, preparing epoxy modified resin: mixing flame-retardant powder with epoxy resin, continuously adding modified aluminum hydroxide powder and ceramic zinc borate, stirring for 20min at 60 ℃ in a heating reaction device, continuously heating to 80 ℃, continuously stirring for reaction for 1h to obtain a modified epoxy resin prepolymer, continuously adding m-phenylenediamine and alicyclic polyamine, curing for 1-3h at 80-110 ℃, checking the curing condition, and continuously curing for 2-6h at 120-180 ℃ to obtain a flame-retardant epoxy resin material;
s3, manufacturing a substrate: uniformly mixing glass fibers and polypropylene fibers to obtain a mixed fiber material, and cutting the mixed fiber material into corresponding sizes after hot pressing and cold pressing to obtain glass fiber cloth;
s4, coating: soaking glass fiber cloth in the flame-retardant epoxy resin material glue solution to obtain a prepreg, drying the prepreg, and drying for 1min at the temperature of 160 ℃;
s5, superposition: copper foils were stacked on both sides of the prepreg sheet by N2Hot pressing at 28-35MPa and 170 ℃ for 70-90min, cooling, and introducingAnd (4) polishing the glue removing device, setting the temperature to be 60-90 ℃, and the time to be 35-55min, rechecking the conditions of plate surface glue residue and star point glue residue, and polishing the glue residue.
2. The preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: in the step S1, the volume of the polypropylene is 89-94 wt%, the volume of the chlorinated paraffin is 1-3 wt%, and the volume of the vinyl phosphite is 5-8 wt%.
3. The preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: in step S1, the average particle diameter of the flame-retardant powder is 0.1-20 μm.
4. The preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: in the step S2, the mass ratio of the flame retardant powder to the epoxy resin to the modified aluminum hydroxide powder to the ceramic zinc borate is 1: 2: (4-6): 1.
5. the preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: in the step S3, the mass ratio of the glass fibers to the polypropylene fibers is 1: 2-1: 3.
6. the preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: the using amount of the glue solution of the flame-retardant epoxy resin material in the step S4 is 127g/m2The gel content is controlled to be 50 +/-1%, the fluidity is controlled to be 10 +/-1%, the volatile matter is less than or equal to 3.5%, and the thickness of the flame-retardant layer is 0.05mm-0.06 mm.
7. The preparation method of the flame-retardant copper-clad plate according to claim 1, which is characterized in that: the glue removing speed in the step S5 is 0.2-0.4mg/cm2。
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