CN103342037B - Production method for improving roughness of one surface of reinforcement plate - Google Patents
Production method for improving roughness of one surface of reinforcement plate Download PDFInfo
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- CN103342037B CN103342037B CN201310301443.XA CN201310301443A CN103342037B CN 103342037 B CN103342037 B CN 103342037B CN 201310301443 A CN201310301443 A CN 201310301443A CN 103342037 B CN103342037 B CN 103342037B
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- mould release
- release membrance
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Abstract
The invention relates to the technical field of preparation of copper-clad plates, and particularly relates to a production method for improving roughness of one surface of a reinforcement plate. A sandwich unit structure is prepared by adopting a mode of sequentially matching a release film/a prepreg/a release film/a prepreg/a release film through overlapping in a hot pressing procedure, then isolated by using a mirror surface steel plate and then subjected to hot-pressing curing; and the release films in each sandwich unit structure are removed after the hot pressing curing is completed so that the two reinforcement plates can be obtained. According to the production method, the reinforcement plate with roughness on one surface can be prepared, the cost of raw materials is saved, the procedures are saved, and the production efficiency is increased.
Description
Technical field
The present invention relates to copper-clad plate technical field, especially a kind of production method improving stiffening plate one side roughness.
Background technology
Stiffening plate is one of the main material during FPC plate is produced.In the hot-press solidifying operation of stiffening plate, mainly foldedly respectively on the two sides of individual or multiple prepreg stacked structures join mould release membrance and form sandwich cellular construction, putting into hot press after this kind of sandwich cellular construction uses mirror steel plate to isolate again, to carry out hot-press solidifying shaping, after having solidified, take off single sandwich cellular construction and remove mould release membrance and obtain finished product.
At present, in stiffening plate production process lamination, its stacked system as shown in Figure 1, namely the lower hot supporting plate in the same opening of press arranges cushion, then stacked mirror steel plate 2, mould release membrance 12, prepreg 11, mould release membrance 12, mirror steel plate 2 successively on the buffer layer, is so cycled to repeat stacked.
In prior art, because mirror steel plate smoothness and hardness are all very high, therefore the mould release membrance contacted with mirror steel plate is after hot pressing, also become light face from the cloudy surface or dull surface with certain roughness, thus cause the prepreg side contacted with mould release membrance to become smooth in its surface after hardening.But in subsequent technique prepared by FPC plate, in order to improve the one side adhesion of stiffening plate, need again to use chemical method or physical grinding method to carry out roughening treatment to the one side of finished product.The drawing method of traditional stiffening plate is that folded mould release membrance of joining forms sandwich structure respectively on the two sides of individual or multiple prepreg stacked structures in addition, this kind of sandwich structure uses mirror steel plate to carry out isolating and put into hot press again to carry out hot-press solidifying shaping, remove mould release membrance after having solidified and obtain finished product, and the drawback of the method is often produce a stiffening plate just to need two mould release membrances, can not continue after mould release membrance removes to use.Its production cost of stiffening plate production method traditional generally expends greatly.
Summary of the invention
For above-mentioned the deficiencies in the prior art, an object of the present invention, provides a kind of production method improving stiffening plate one side roughness, and the method obtains while one side has roughness stiffening plate, not only save the cost of raw material, and saved process, enhance productivity.
To achieve these goals, technical scheme of the present invention is as follows:
Improve a production method for stiffening plate one side roughness, first by prepreg and internal layer mould release membrance, outer mould release membrance according to: the order of outer mould release membrance/prepreg/internal layer mould release membrance/prepreg/outer mould release membrance is folded is made into a sandwich cellular construction;
Then, by described sandwich cellular construction and mirror steel plate according to: mirror steel plate/sandwich structure unit/mirror steel plate/... the order of/mirror steel plate stacks, and obtains board component;
Then, the board component stacked is put into hot press and carries out hot-press solidifying, after hot-press solidifying is shaping, removes mirror steel plate and obtain sandwich cellular construction described in multiple, separately each sandwich cellular construction tears internal layer mould release membrance and outer mould release membrance, namely obtains the described stiffening plate that two one sides are coarse.
Preferably, the coating on both sides of described internal layer mould release membrance has silicon class mould release.Silicon class mould release is selected from alkyl silicone oil.Silicon alkyl oil meter surface tension is between 15 ~ 22mN/m, and the surface tension flowing out resin during prepreg hot pressing is greater than 30mN/m, and the resin that therefore prepreg hot pressing is flowed out cannot be combined with silicon alkyl oil phase.
Preferably, described internal layer mould release membrance is PET mould release membrance or PA mould release membrance.These two kinds of mould release membrances are thermoplasticity, can soften time between the hot pressing gummosis stage both 100 DEG C ~ 160 DEG C of prepreg.
Preferably, described internal layer mould release membrance thickness is 25 μm ~ 150 μm; (conventional thickness has: 12 μm, 19 μm, 25 μm, 38 μm, 50 μm, 75 μm, 100 μm, 125 μm, 188 μm)
Preferably, described internal layer mould release membrance is cloudy surface or dull surface, and its roughness is between 0.3 μm ~ 2.0 μm.
Wherein, the prepreg be located in described between outer mould release membrance and internal layer mould release membrance is multiple prepregs of individual prepreg or hot-press solidifying obtained by molding.
Wherein, the process conditions of described hot press hot-press solidifying: pressure is 10kg/cm
2~ 35kg/cm
2, temperature is progressively warming up to solidification temperature from room temperature according to the heating rate of 1 DEG C/min ~ 3 DEG C/min, and solidification temperature is 160 DEG C ~ 190 DEG C.
Preferably, described solidification temperature is progressively warming up to described solidification temperature from room temperature according to the heating rate of 1 DEG C/min ~ 3 DEG C/min.
A kind of stiffening plate, the production method employing described raising stiffening plate one side roughness obtains.
The present invention is made into sandwich cellular construction according to the mode of mould release membrance/prepreg/mould release membrance/prepreg/mould release membrance is folded, then mirror steel plate isolation is used to carry out hot-press solidifying again this sandwich cellular construction, after hot-press solidifying is shaping, unload sandwich cellular construction, finally each sandwich cellular construction mould release membrance is removed, the stiffening plate that two one sides are coarse can be obtained.
Use this kind of method, in prepreg hot-press solidifying process, prepreg near the side of mirror steel plate is due to mirror steel plate smooth surface, therefore the outer mould release membrance contacted with mirror steel plate is after hot pressing, also become light face from the cloudy surface or dull surface with certain roughness, thus cause the prepreg side that contacts with outer mould release membrance due to resin flows after hardening its surface become smooth.Internal layer mould release membrance both sides prepreg when resin flows, its microcosmic there are differences and produces pressure differential, and now therefore internal layer mould release membrance can produce deformation on microcosmic owing to being in softening state, in addition mould release membrance surface is cloudy surface or dull surface, cause internal layer mould release membrance surface to form the projection of more crypto set and recessed, namely produce coarse mode of appearance.Along with the lifting of hot pressing temperature and the accumulation of time, the rough surface form of internal layer mould release membrance is transferred to the prepreg the solidified surface of both sides.Internal layer mould release membrance and outer mould release membrance are removed, the stiffening plate with one side alligatoring effect can be obtained.
After testing, the stiffening plate that the present invention obtains, its stiffening plate surface roughness Ra contacted with internal layer mould release membrance can reach 10 ~ 15 μm, and the stiffening plate surface roughness Ra contacted with outer mould release membrance only has 3 ~ 5 μm.Mirror steel plate: the steel plate using high-carbon steel or alloy steel rolling, thickness 2mm ~ 5mm, surface roughness Ra is generally between 0.01 μm ~ 0.05 μm.
In a word, tool of the present invention has the following advantages: prepare in stiffening plate, and while saving production cost, the one side met needed for subsequent processing has the requirement of roughness stiffening plate.It saves production cost and is mainly reflected in two aspects, and on the one hand, relative conventional method, often producing a stiffening plate just needs two mould release membrances, has saved the consumption of mould release membrance.On the other hand, no longer need to polish or chemical coarse process to stiffening plate in addition, while saving the operation of processing preparation, saved the consumption manually expended with chemical agent and production equipment thereof of polishing; Thus greatly saved overall manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that in existing preparation method's hot pressing, board component stacks,
Fig. 2 is the structural representation that in hot pressing of the present invention, board component stacks.
Detailed description of the invention
Below in conjunction with accompanying drawing, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.
Embodiment 1
A kind of production method improving stiffening plate one side roughness, see Fig. 2, first by prepreg 11 and internal layer mould release membrance 121, outer mould release membrance 122 according to: the form of the outer mould release membrance 122 of outer mould release membrance 122/ prepreg 11/ internal layer mould release membrance 121/ prepreg 11/ is folded is made into a sandwich cellular construction 1; Wherein, prepreg 11 can be individual prepreg, and internal layer mould release membrance 121 is PET mould release membrance or PA mould release membrance, and can carry out selection thickness according to final FPC plate to the requirement of stiffening plate roughness is 100 μm, the different mould release membrances of surface roughness 1.2 μm.
Then, by described sandwich cellular construction 1 and mirror steel plate 2 according to mirror steel plate 2/ sandwich structure unit 1/ mirror steel plate 2/ ... the order of/mirror steel plate 2 stacks, and obtains board component;
Then, the board component stacked is put into hot press and carry out the shaping (process conditions: pressure is 10kg/cm of hot-press solidifying
2~ 35kg/cm
2temperature is progressively warming up to solidification temperature from room temperature according to the heating rate of 1 DEG C/min ~ 3 DEG C/min, solidification temperature is 160 DEG C ~ 190 DEG C), after solidification, remove mirror steel plate 2 and obtain sandwich cellular construction 1 described in multiple, separately namely each sandwich cellular construction 1 obtains the coarse stiffening plate of described two one sides.
Mirror steel plate is generally the same to minute surface through careful Throwing light, typically uses the steel plate of high-carbon steel or alloy steel rolling, thickness 2mm ~ 5mm, and surface roughness Ra is generally between 0.01 μm ~ 0.05 μm.Because resin flows makes the prepreg 11 after solidifying near the roughness of the side 11b of mirror steel plate 2 close to mirror steel plate.And prepreg 11 is away from the side 11a of mirror steel plate 2, owing to there is no mirror steel plate effect, the pressure differential of its prepreg gummosis process and middle mould release membrance roughness create side 11a that final prepreg 11 solidify to form stiffening plate and have roughness (being at least greater than 10 μm) required for subsequent processing, enable to carry out good combination with glued membrane or liquid glue, can not occur being separated in follow-up process.
Embodiment 2
First by prepreg and internal layer mould release membrance, outer mould release membrance according to: the order of outer mould release membrance/prepreg/internal layer mould release membrance/prepreg/outer mould release membrance is folded is made into a sandwich cellular construction; Wherein, to be that multiple prepregs are stacking form prepreg; Then by described sandwich cellular construction and mirror steel plate according to: the order of mirror steel plate/sandwich structure unit/mirror steel plate/sandwich structure unit/mirror steel plate stacks, and obtains board component; Then the board component stacked is put into hot press and carry out hot-press solidifying, after hot-press solidifying is shaping, remove mirror steel plate and obtain sandwich cellular construction described in multiple, separately each sandwich cellular construction tears internal layer mould release membrance and outer mould release membrance, namely obtains two stiffening plates.
Embodiment 3
With embodiment 1, its difference is, selects thickness to be 150 μm, surface roughness be the PET mould release membrance of 0.3 μm as internal layer mould release membrance, carry out stiffening plate production according to enforcement 1, the stiffening plate that one side roughness is 10 μm can be obtained;
Embodiment 4
With embodiment 1, its difference is, selects thickness to be 25 μm, surface roughness be the PA mould release membrance of 2.0 μm as internal layer mould release membrance, carry out stiffening plate production according to enforcement 1, the stiffening plate that one side roughness is 15 μm can be obtained;
Embodiment 5
With embodiment 1, its difference is, selects thickness to be 50 μm, surface roughness be the PA mould release membrance of 1.0 μm as internal layer mould release membrance, carry out stiffening plate production according to enforcement 1, the stiffening plate that one side roughness is 12 μm can be obtained;
Above disclosedly be only the preferred embodiments of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the present patent application the scope of the claims does, still belong to the scope that the present invention is contained.
Comparative example 1
In stiffening plate production process lamination, its stacked system as shown in Figure 1, namely the lower hot supporting plate in the same opening of press arranges cushion, then stacked mirror steel plate 2, mould release membrance 12, prepreg 11, mould release membrance 12, mirror steel plate 2 successively on the buffer layer, be so cycled to repeat stacked.
By contrast, calculate to produce 16 stiffening plates, need 32 mould release membrances and 17 mirror steel plates altogether; And the present invention, produce 16 stiffening plates, only need 24 mould release membrances to save the mould release membrance consumption of 25%, only need 9 mirror steel plates to save the mirror steel plate consumption of nearly 50%.
Claims (7)
1. improve a production method for stiffening plate one side roughness, it is characterized in that,
First by prepreg and internal layer mould release membrance, outer mould release membrance according to: the order of outer mould release membrance/prepreg/internal layer mould release membrance/prepreg/outer mould release membrance is folded is made into a sandwich cellular construction;
Then, by described sandwich cellular construction and mirror steel plate according to: mirror steel plate/sandwich structure unit/mirror steel plate/sandwich structure unit/... the order of/mirror steel plate stacks, and obtains board component;
Then, the board component stacked is put into hot press and carries out hot-press solidifying, after hot-press solidifying is shaping, removes mirror steel plate and obtain sandwich cellular construction described in multiple, separately each sandwich cellular construction tears internal layer mould release membrance and outer mould release membrance, namely obtains the described stiffening plate that two one sides are coarse;
Described internal layer mould release membrance thickness is 25 μm ~ 150 μm, and described internal layer mould release membrance is cloudy surface or dull surface, and its roughness is between 0.3 μm ~ 2.0 μm.
2. improve the production method of stiffening plate one side roughness as claimed in claim 1, it is characterized in that: the coating on both sides of described internal layer mould release membrance has silicon class mould release.
3. improve the production method of stiffening plate one side roughness as claimed in claim 2, it is characterized in that: the alkyl silicone oil of described silicon class mould release to be surface tension be 15 ~ 22mN/m.
4. improve the production method of stiffening plate one side roughness as claimed in claim 3, it is characterized in that: described internal layer mould release membrance is PET mould release membrance or PA mould release membrance.
5. improve the production method of stiffening plate one side roughness as claimed in claim 1, it is characterized in that: described in the prepreg be located between outer mould release membrance and internal layer mould release membrance be multiple prepregs of individual prepreg or hot-press solidifying obtained by molding.
6. as improved the production method of stiffening plate one side roughness in Claims 1 to 5 as described in any one, it is characterized in that: the process conditions of described hot press hot-press solidifying: pressure is 10kg/cm
2~ 35kg/cm
2, solidification temperature is 160 DEG C ~ 190 DEG C.
7. improve the production method of stiffening plate one side roughness as claimed in claim 6, it is characterized in that: described solidification temperature is progressively warming up to described solidification temperature from room temperature according to the heating rate of 1 DEG C/min ~ 3 DEG C/min.
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| CN103342037B true CN103342037B (en) | 2015-07-22 |
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| CN103552347A (en) * | 2013-10-29 | 2014-02-05 | 鑫永铨股份有限公司 | Manufacturing method of fibre reinforced plate material |
| CN104244595A (en) * | 2014-09-09 | 2014-12-24 | 苏州米达思精密电子有限公司 | Method for manufacturing adhesive indentation reinforcing sheet |
| CN106313839A (en) * | 2015-07-08 | 2017-01-11 | 苏州泽成电子科技有限公司 | FPC (flexible printed circuit) press-fitting high-temperature-resistant composite release film and manufacturing method thereof |
| CN105644107A (en) * | 2015-12-28 | 2016-06-08 | 深圳市景旺电子股份有限公司 | Multilayer flexible board and laminating method thereof |
| JP6371460B1 (en) * | 2017-12-06 | 2018-08-08 | タツタ電線株式会社 | Reinforcing board for wiring board |
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| CN101522812A (en) * | 2006-10-06 | 2009-09-02 | 住友电木株式会社 | Resin composition, insulating sheet with base, prepreg, multilayer printed wiring board and semiconductor device |
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| JPH01248685A (en) * | 1988-03-30 | 1989-10-04 | Shin Kobe Electric Mach Co Ltd | Manufacture of single-sided metallic-foil-clad laminated board and manufacture of single-sided printed circuit board |
| JPH06252549A (en) * | 1993-03-01 | 1994-09-09 | Hitachi Chem Co Ltd | Manufacture of laminated board covered with bonding agent |
| JPH07256669A (en) * | 1994-03-28 | 1995-10-09 | Hitachi Chem Co Ltd | Manufacture of laminated sheet |
| JP3080542B2 (en) * | 1994-07-18 | 2000-08-28 | デンセイ・ラムダ株式会社 | Inverter system of carrier frequency modulation by high frequency transformer coupling |
| CN103029169B (en) * | 2012-12-21 | 2016-01-20 | 深圳市柳鑫实业股份有限公司 | A kind of boring blind flange of PCB and manufacture method |
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| CN101522812A (en) * | 2006-10-06 | 2009-09-02 | 住友电木株式会社 | Resin composition, insulating sheet with base, prepreg, multilayer printed wiring board and semiconductor device |
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