CN105898984A - Production technology for baseplate made of polytetrafluoroethylene glass fiber composite - Google Patents
Production technology for baseplate made of polytetrafluoroethylene glass fiber composite Download PDFInfo
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- CN105898984A CN105898984A CN201610288349.9A CN201610288349A CN105898984A CN 105898984 A CN105898984 A CN 105898984A CN 201610288349 A CN201610288349 A CN 201610288349A CN 105898984 A CN105898984 A CN 105898984A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention relates to a production technology for a baseplate made of a polytetrafluoroethylene glass fiber composite. The technology comprises the steps that at first, 65-75 parts by weight of polytetrafluoroethylene emulsion, 20-30 parts by weight of inorganic filler, 0.5-2 parts by weight of surfactant, 2-3 parts by weight of thickener and 1-2 parts by weight of dispersant are mixed to form a polytetrafluoroethylene dispersion solution; then the polytetrafluoroethylene dispersion solution is pumped into a soaking trough of a vertical gluing machine; glass fiber cloth passes the soaking trough and a high-precision measurement wheel via a transmission mechanism of the gluing machine; and finally, the glass fiber cloth soaked with the polytetrafluoroethylene dispersion solution successively passes through the vertical gluing machine for baking, and the cloth is then overlaid and compressed with steel plates and copper foils according to a certain sequence, so that the baseplate made of the polytetrafluoroethylene glass fiber composite is obtained. The technology provided by the invention has the advantages that the preparation method is simple; operational steps are easy; the defect in a traditional technology that repeated soaking is required during preparation of adhesive sheets is solved; the prepared baseplate has a stable dielectric constant and low medium losses; a thermal expansion coefficient of the baseplate is low; and mechanical performance, electric performance and size stability of the baseplate are good.
Description
Technical field
The present invention relates to the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate, belong to technical field of composite preparation.
Background technology
Along with electronics and IT products gradually develop towards volume miniaturization, transmission high-frequency high-speed direction.Traditional epoxy resin sheet material is high due to its material dielectric constant, the shortcoming that dielectric loss is big, cannot meet the demand that circuit is designed by engineers, baseplate material will gradually be replaced by the material with high-frequency high-speed and high reliability, in recent years, the most urgent to the demand of high-frequency high-speed baseplate material.
Polytetrafluoroethylmaterial material has physical property and the chemical property of uniqueness, politef has excellent electrical characteristic, its chemical stability is the highest, high temperature resistant, water absorption is extremely low, politef is dielectric constant, dielectric loss excellent stability in high-frequency range, most suitable using politef as the matrix material of high-frequency high-speed baseplate material.Produce copper-clad plate with politef, be currently mainly divided into two big classes: a kind of composite medium substrate for strengthening without glass fabric, another kind is the ptfe substrate containing glass fabric enhancement mode.
The preparation method of the composite medium substrate of enhancement mode without glass fabric: first fluororesin powder is mixed with inorganic filler, it is subsequently adding organic lubricant, stir into dough object, carry out again extruding, the operation such as calendering, obtain sheet material, this sheet material is carried out heat (250 DEG C/6h) and processes, then impregnate this sheet material with fluororesin dispersion emulsion, and be dried, bake and bank up with earth, sinter, obtain the sheet material that hole is few, one layer of resin molding has been covered on surface.The preparation method of the another kind of composite medium substrate containing glass fabric enhancement mode: glass fabric is immersed in ptfe emulsion, polytetrafluoroethylglass glass fiber cloth film is obtained through impregnation repeatedly, again through manual stacking film, after high-temperature laminating, obtain substrate sheet material.
Summary of the invention
The invention aims to solve the problem that traditional epoxy resin sheet material preparation method complexity, the bonding sheet repeated multiple times impregnation of need and the substrate high frequency stability prepared are poor, it is provided that the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate.
The present invention adopts the following technical scheme that the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate, comprises the steps:
(1) preparation of polytetrafluoroethyldispersion dispersion: the most respectively by 65～75 parts of ptfe emulsions, 20～30 parts of inorganic fillers, 0.5～2 part of surfactant, 2～3 parts of thickening agents, 1～2 part of dispersant, it is uniformly dispersed through homogenizer, obtain polytetrafluoroethyldispersion dispersion, adding solvent, the viscosity adjusting polytetrafluoroethyldispersion dispersion is 600～800mPa.s；
(2) polytetrafluoroethyldispersion dispersion is pumped in the impregnating groove of vertical gluing machine, by glass fabric through vertical gluing machine transmission mechanism through impregnating groove and high-precision measuring wheel；
(3) gluing baking: vertical gluing machine baking temperature is set, the temperature of vertical gluing machine is divided into first paragraph baking zone, second segment baking zone and three humidity provinces of the 3rd section of baking zone to arrange, first paragraph baking zone is dry section, temperature is set to 180～220 DEG C, contained humidity in film can be evaporated after impregnation, second segment baking zone is for bakeing district, temperature is set to 260～300 DEG C, some auxiliary agents can be removed, 3rd section of baking zone is sintering zone, temperature is set to 300～340 DEG C, it is possible to make polytetrafluoroethyldispersion dispersion combine closely with glass fabric；
(4) gap of high-precision measuring wheel is adjusted according to required bonding sheet thickness, glass fabric impregnated groove extrudes through high accuracy measurement wheel after the coating of polytetrafluoroethyldispersion dispersion, resin content is fixed and uniformly penetrating enters in glass fabric, then the glass fabric after Impregnation dispersions is sequentially passed through the first paragraph baking zone of vertical gluing machine, second segment baking zone and the 3rd section of baking zone, cool down through chill roll and air knife again, entangle Ji Jishou limit, limit machine through EPC, on winder, finally obtain web-like polytetrafluoroethylglass glass fiber cloth bonding sheet；
(5) by polytetrafluoroethylglass glass fiber cloth bonding sheet after overlapping, the most successively then steel plate-Copper Foil-polytetrafluoroethylglass glass fiber cloth bonding sheet-Copper Foil-steel plate lay is neatly combined through full-automatic return wire, after obtain polytetrafluoroethylglass glass fiber cloth composite substrate through vacuum high-temperature press pressing.
Further, the mixture of the one or two kinds of during described inorganic filler is silicon dioxide, aluminium hydroxide, aluminium oxide.
Further, described surfactant is nonionic surfactant.
Further, one or both during described thickening agent is the distyrenated phenyl ether of polyoxyethylene groups or NPE.
Further, one or both during described dispersant is Quadrafos, silicate, alkylphenol polyoxyethylene, polycarboxylate.
Further, the rotating speed of described step (1) high speed blender is 600～900 revs/min, and mixing time is 150～240min.
Further, in described step (5), the vacuum of vacuum high-pressure is 30～40torr, and temperature is 200～410 DEG C, and high temperature section is 390～410 DEG C, is incubated 180～220min, and pressing time is 5～6h.
Further, in described step (4), glass fabric carries out the coating of polytetrafluoroethyldispersion dispersion in impregnating groove with the speed of 1.5-2.2m/min.
Preparation method of the present invention is simple, step is easily operated, improve the resin content of polytetrafluoroethylglass glass fiber cloth adhesive sheet, overcome traditional handicraft to prepare bonding sheet and need repeated multiple times impregnation could prepare the deficiency of bonding sheet, improve the quality of polytetrafluoroethylglass glass fiber cloth bonding sheet, the excellent performance of the polytetrafluoroethylglass glass fiber composite substrate prepared is stable, there is stable dielectric constant and relatively low dielectric loss, relatively low thermal coefficient of expansion, mechanical performance, electric property and good stability of the dimension, disclosure satisfy that domestic air mail, space flight, mobile phone receives the development of society's advanced IT application such as base station, the demand of the high speed development of information processing.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment one: the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate, comprises the steps:
(1) preparation of polytetrafluoroethyldispersion dispersion: the most respectively by 65 parts of ptfe emulsions, 30 parts of inorganic fillers, 0.5 part of surfactant, 3 parts of thickening agents, 1 part of dispersant, it is uniformly dispersed through homogenizer, the rotating speed of homogenizer is 600 revs/min, mixing time is that 240min obtains polytetrafluoroethyldispersion dispersion, adding solvent, the viscosity adjusting polytetrafluoroethyldispersion dispersion is 600～800mPa.s；
Wherein, machine filler is silicon dioxide and aluminium hydroxide；Surfactant is nonionic surfactant；Thickening agent is the distyrenated phenyl ether of polyoxyethylene groups；Dispersant is Quadrafos；
(2) polytetrafluoroethyldispersion dispersion is pumped in the impregnating groove of vertical gluing machine, by glass fabric through gluing machine transmission mechanism through impregnating groove and high-precision measuring wheel；
(3) gluing baking: gluing machine baking temperature is set, the temperature of gluing machine is divided into first paragraph baking zone, second segment baking zone and three humidity provinces of the 3rd section of baking zone to arrange, first paragraph baking zone is dry section, temperature is set to 180 DEG C, contained humidity in film can be evaporated after impregnation, second segment baking zone is for bakeing district, temperature is set to 300 DEG C, some auxiliary agents can be removed, 3rd section of baking zone is sintering zone, temperature is set to 340 DEG C, it is possible to make polytetrafluoroethyldispersion dispersion combine closely with glass fabric；
(4) gap of high-precision measuring wheel is adjusted according to required bonding sheet thickness, glass fabric extrudes through high accuracy measurement wheel after carrying out the coating of polytetrafluoroethyldispersion dispersion in impregnating groove with the speed of 1.5m/min, resin content is fixed and uniformly penetrating enters in glass fabric, then the glass fabric after Impregnation dispersions is sequentially passed through the first paragraph baking zone of vertical gluing machine, second segment baking zone and the 3rd section of baking zone, cool down through chill roll and air knife again, Ji Jishou limit, limit machine is entangled through EPC, finally on winder, obtain web-like polytetrafluoroethylglass glass fiber cloth bonding sheet；
(5) by polytetrafluoroethylglass glass fiber cloth bonding sheet after overlapping, the most successively then steel plate-Copper Foil-polytetrafluoroethylglass glass fiber cloth bonding sheet-Copper Foil-steel plate lay is neatly combined through full-automatic return wire, polytetrafluoroethylglass glass fiber cloth composite substrate is obtained through vacuum high-temperature press pressing after, the vacuum of vacuum high-pressure is 30torr, temperature is 200 DEG C, high temperature section is 390 DEG C, is incubated 180min, and pressing time is 6h.
Embodiment two: the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate, comprises the steps:
(1) preparation of polytetrafluoroethyldispersion dispersion: the most respectively by 70 parts of ptfe emulsions, 25 parts of inorganic fillers, 1 part of surfactant, 2.5 parts of thickening agents, 1.5 parts of dispersant, it is uniformly dispersed through homogenizer, the rotating speed of homogenizer is 800 revs/min, mixing time is that 200min obtains polytetrafluoroethyldispersion dispersion, adding solvent, the viscosity adjusting polytetrafluoroethyldispersion dispersion is 600～800mPa.s；
Wherein, machine filler is silicon dioxide and aluminium hydroxide；Surfactant is nonionic surfactant；Thickening agent is the distyrenated phenyl ether of polyoxyethylene groups and NPE；Dispersant is silicate and alkylphenol polyoxyethylene；
(2) polytetrafluoroethyldispersion dispersion is pumped in the impregnating groove of vertical gluing machine, by glass fabric through gluing machine transmission mechanism through impregnating groove and high-precision measuring wheel；
(3) gluing baking: gluing machine baking temperature is set, the temperature of gluing machine is divided into first paragraph baking zone, second segment baking zone and three humidity provinces of the 3rd section of baking zone to arrange, first paragraph baking zone is dry section, temperature is set to 200 DEG C, contained humidity in film can be evaporated after impregnation, second segment baking zone is for bakeing district, temperature is set to 280 DEG C, some auxiliary agents can be removed, 3rd section of baking zone is sintering zone, temperature is set to 300 DEG C, it is possible to make polytetrafluoroethyldispersion dispersion combine closely with glass fabric；
(4) gap of high-precision measuring wheel is adjusted according to required bonding sheet thickness, glass fabric extrudes through high accuracy measurement wheel after carrying out the coating of polytetrafluoroethyldispersion dispersion in impregnating groove with the speed of 2m/min, resin content is fixed and uniformly penetrating enters in glass fabric, then the glass fabric after Impregnation dispersions is sequentially passed through the first paragraph baking zone of vertical gluing machine, second segment baking zone and the 3rd section of baking zone, cool down through chill roll and air knife again, Ji Jishou limit, limit machine is entangled through EPC, finally on winder, obtain web-like polytetrafluoroethylglass glass fiber cloth bonding sheet；
(5) by polytetrafluoroethylglass glass fiber cloth bonding sheet after overlapping, the most successively then steel plate-Copper Foil-polytetrafluoroethylglass glass fiber cloth bonding sheet-Copper Foil-steel plate lay is neatly combined through full-automatic return wire, polytetrafluoroethylglass glass fiber cloth composite substrate is obtained through vacuum high-temperature press pressing after, the vacuum of vacuum high-pressure is 35torr, temperature is 300 DEG C, high temperature section is 400 DEG C, is incubated 200min, and pressing time is 5.5h.
Embodiment three: the production technology of a kind of polytetrafluoroethylglass glass fiber composite substrate, comprises the steps:
(1) preparation of polytetrafluoroethyldispersion dispersion: the most respectively by 75 parts of ptfe emulsions, 20 parts of inorganic fillers, 2 parts of surfactants, 2 parts of thickening agents, 2 parts of dispersant, it is uniformly dispersed through homogenizer, the rotating speed of homogenizer is 900 revs/min, mixing time is that 150min obtains polytetrafluoroethyldispersion dispersion, adding solvent, the viscosity adjusting polytetrafluoroethyldispersion dispersion is 600～800mPa.s；
Wherein, machine filler is silicon dioxide and aluminium oxide；Surfactant is nonionic surfactant；Thickening agent is NPE；Dispersant is alkylphenol polyoxyethylene and polycarboxylate；
(2) polytetrafluoroethyldispersion dispersion is pumped in the impregnating groove of vertical gluing machine, by glass fabric through gluing machine transmission mechanism through impregnating groove and high-precision measuring wheel；
(3) gluing baking: gluing machine baking temperature is set, the temperature of gluing machine is divided into first paragraph baking zone, second segment baking zone and three humidity provinces of the 3rd section of baking zone to arrange, first paragraph baking zone is dry section, temperature is set to 220 DEG C, contained humidity in film can be evaporated after impregnation, second segment baking zone is for bakeing district, temperature is set to 260 DEG C, some auxiliary agents can be removed, 3rd section of baking zone is sintering zone, temperature be set to 300～DEG C, it is possible to make polytetrafluoroethyldispersion dispersion combine closely with glass fabric；
(4) gap of high-precision measuring wheel is adjusted according to required bonding sheet thickness, glass fabric extrudes through high accuracy measurement wheel after carrying out the coating of polytetrafluoroethyldispersion dispersion in impregnating groove with the speed of 2.2m/min, resin content is fixed and uniformly penetrating enters in glass fabric, then the glass fabric after Impregnation dispersions is sequentially passed through the first paragraph baking zone of vertical gluing machine, second segment baking zone and the 3rd section of baking zone, cool down through chill roll and air knife again, Ji Jishou limit, limit machine is entangled through EPC, finally on winder, obtain web-like polytetrafluoroethylglass glass fiber cloth bonding sheet；
(5) by polytetrafluoroethylglass glass fiber cloth bonding sheet after overlapping, the most successively then steel plate-Copper Foil-polytetrafluoroethylglass glass fiber cloth bonding sheet-Copper Foil-steel plate lay is neatly combined through full-automatic return wire, polytetrafluoroethylglass glass fiber cloth composite substrate is obtained through vacuum high-temperature press pressing after, the vacuum of vacuum high-pressure is 40torr, temperature is 410 DEG C, high temperature section is 410 DEG C, is incubated 220min, and pressing time is 5h.
Claims (8)
1. the production technology of a polytetrafluoroethylglass glass fiber composite substrate, it is characterised in that: comprise the steps:
(1) preparation of polytetrafluoroethyldispersion dispersion: the most respectively by 65～75 parts of ptfe emulsions, 20～30 parts of inorganic fillers, 0.5～2 part of surfactant, 2～3 parts of thickening agents, 1～2 part of dispersant, it is uniformly dispersed through homogenizer, obtain polytetrafluoroethyldispersion dispersion, adding distilled water, the viscosity adjusting polytetrafluoroethyldispersion dispersion is 600～800mPa.s；
(2) polytetrafluoroethyldispersion dispersion is pumped in the impregnating groove of vertical gluing machine, by glass fabric through vertical gluing machine transmission mechanism through impregnating groove and high-precision measuring wheel；
(3) gluing baking: vertical gluing machine baking temperature is set, the temperature of vertical gluing machine is divided into first paragraph baking zone, second segment baking zone and three humidity provinces of the 3rd section of baking zone to arrange, first paragraph baking zone is dry section, temperature is set to 180～220 DEG C, contained humidity in film can be evaporated after impregnation, second segment baking zone is for bakeing district, temperature is set to 260～300 DEG C, some auxiliary agents can be removed, 3rd section of baking zone is sintering zone, temperature is set to 300～340 DEG C, it is possible to make polytetrafluoroethyldispersion dispersion combine closely with glass fabric；
(4) gap of high-precision measuring wheel is adjusted according to required bonding sheet thickness, glass fabric impregnated groove extrudes through high accuracy measurement wheel after the coating of polytetrafluoroethyldispersion dispersion, resin content is fixed and uniformly penetrating enters in glass fabric, then the glass fabric after Impregnation dispersions is sequentially passed through the first paragraph baking zone of vertical gluing machine, second segment baking zone and the 3rd section of baking zone, cool down through chill roll and air knife again, entangle Ji Jishou limit, limit machine through EPC, on winder, finally obtain web-like polytetrafluoroethylglass glass fiber cloth bonding sheet；
(5) by polytetrafluoroethylglass glass fiber cloth bonding sheet after overlapping, the most successively then steel plate-Copper Foil-polytetrafluoroethylglass glass fiber cloth bonding sheet-Copper Foil-steel plate lay is neatly combined through full-automatic return wire, after obtain polytetrafluoroethylglass glass fiber cloth composite substrate through vacuum high-temperature press pressing.
2. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: described inorganic filler is the mixture of the one or two kinds of in silicon dioxide, aluminium hydroxide, aluminium oxide.
3. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: described surfactant is nonionic surfactant.
4. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: described thickening agent is one or both in the distyrenated phenyl ether of polyoxyethylene groups or NPE.
5. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: described dispersant is one or both in Quadrafos, silicate, alkylphenol polyoxyethylene, polycarboxylate.
6. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: the rotating speed of described step (1) high speed blender is 600～900 revs/min, and mixing time is 150～240min.
7. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterized in that: in described step (5), the vacuum of vacuum high-pressure is 30～40torr, temperature is 200～410 DEG C, high temperature section is 390～410 DEG C, insulation 180～220min, pressing time is 5～6h.
8. the production technology of polytetrafluoroethylglass glass fiber composite substrate as claimed in claim 1, it is characterised in that: in described step (4), glass fabric carries out the coating of polytetrafluoroethyldispersion dispersion in impregnating groove with the speed of 1.5-2.2m/min.
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Cited By (11)
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| CN108250634A (en) * | 2017-12-13 | 2018-07-06 | 浙江理工大学 | For the preparation method and product of glass fiber impregnated modified Teflon dispersion liquid |
| CN108265517A (en) * | 2017-12-13 | 2018-07-10 | 浙江理工大学 | A kind of preparation method of fold resistant polytetrafluoroethylene (PTFE)/glass fibre membrane material |
| CN108410167A (en) * | 2018-04-09 | 2018-08-17 | 贵州省材料产业技术研究院 | Low dielectric nylon material of a kind of fiberglass reinforced and preparation method thereof |
| CN110892018A (en) * | 2017-07-14 | 2020-03-17 | 阿科玛股份有限公司 | High strength polyvinylidene fluoride composites |
| CN112477363A (en) * | 2020-11-17 | 2021-03-12 | 中国电子科技集团公司第四十六研究所 | Preparation method of low-warpage copper-clad plate |
| CN112477359A (en) * | 2020-11-17 | 2021-03-12 | 中国电子科技集团公司第四十六研究所 | Preparation process of polytetrafluoroethylene glass fiber copper-clad plate with high gluing amount |
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| CN113881171A (en) * | 2021-09-29 | 2022-01-04 | 浙江华正新材料股份有限公司 | Resin composition, adhesive sheet, circuit board, and printed wiring board |
| CN114161741A (en) * | 2021-12-06 | 2022-03-11 | 中国电子科技集团公司第四十六研究所 | Method for forming polytetrafluoroethylene impregnated sheet with high filler content |
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