CN102775716A - Preparation method for polymer conductive shielding material and product - Google Patents
Preparation method for polymer conductive shielding material and product Download PDFInfo
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- CN102775716A CN102775716A CN2012102328628A CN201210232862A CN102775716A CN 102775716 A CN102775716 A CN 102775716A CN 2012102328628 A CN2012102328628 A CN 2012102328628A CN 201210232862 A CN201210232862 A CN 201210232862A CN 102775716 A CN102775716 A CN 102775716A
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Abstract
The invention discloses a preparation method for a polymer conductive shielding material and a product. The preparation method comprises the following steps of preparation of raw materials, material weighing, internal mixing, open mill, curing and forming, secondary curing treatment and checking, sealing and warehousing of the prepared polymer conductive shielding material sheet. The product prepared by the preparation method of the polymer conductive shielding material disclosed by the invention can solve the problem of electromagnetic wave leakage and achieve the functions of water resistance, moisture resistance and dust resistance. The whole protected space forms an airtight independent electromagnetic space, and thus an electromagnetic signal is protected and the pollution to surrounding environment due to electromagnetic waves is avoided. No special requirement on an application environment is needed to be met; and on the premise that inherent performances are retained, the excellent stability of product performances is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of conductive polymer shielding material, be specifically related to this preparation technology's flow process, also comprise the goods that form through this technical process preparation method.
Background technology
The world today has got into the flourish epoch with depth development of communication electronics, and the application of high frequency, ultra-high frequency electromagnetic signal is in expansion development rapidly, the stretching, extension that the field of application and scope are unlimited.In this flourishing high-frequency signal development, also with some negative effects, EMI, the hertzian wave of electromagnetic compatibility and leakage has more and more caused human concern and attention to the influence of the mankind's orthobiosis.
The thinking of traditional solution electromagnetic-wave leakage and method are on product structure, to do some considerations; For example open some apertures as far as possible or add metal cap at the position that needs perforate; Or the shielding product of comparative maturity on the employing market, metal shield materials, conducting foam; This series products very easily receives the influence of surrounding enviroment and progressively loses itself electro-magnetic screen function, and work-ing life is shorter.In the relatively harsh place of some applied environment conditions, such as, in the open air stand the communication base station that exposes to the sun and rain, common electromagnetic shielding condition is difficult to satisfy it should realize the waterproof and dampproof requirement that solves electromagnetic leakage again.
Summary of the invention
To above-mentioned prior art deficiency, the object of the present invention is to provide a kind of preparation method of conductive polymer shielding material, also comprise the goods of producing by this method.
The present invention realizes that the technical scheme that above-mentioned purpose adopts is:
A kind of preparation method of conductive polymer shielding material is characterized in that, comprises following method steps:
(1) raw material preparing: prepare nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material respectively;
(2) take by weighing material: the weight according to nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material 1:3 takes by weighing, and is subsequent use;
(3) carry out banburying: with Banbury mixer preheating 10 minutes, stablize 5 fens clock times after, add the modified high-molecular silastic material earlier, and then add nickel plating graphite Ni-C conductive powder, at the discharge after 5-20 minute of maintenance rotating speed 60-80rpm under, make glue stuff compounding;
(4) open refining: 2-3mm is transferred in the roll spacing of mill, turns on the power switch, make the mill running; Open the recirculated water valve, will throw into mill from the sizing material that Banbury mixer is discharged again and wrap roller, further mixing; Mix until sizing material, material surface is glossy, discharges sizing material;
(5) curing molding: the sizing material that will open after the refining drops into the precision extrusion molding machine; In temperature is that 300 ℃, pressure are under the 6.5Mpa condition; Extruded velocity is 13 ~ 17cm/min; Be 8-12 second set time, and sizing material is extruded, and the forming area through mould under condition of cure is molded into the conductive articles with shielding properties;
(6) regelate is handled: to the cured prod that makes, be 180 ℃ in temperature, solidify once more under the recirculated air condition that be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of cured prod, finally make the conductive polymer shielding product after the setting.
(7) the conductive polymer shielding material sheet that makes is checked, sealed and put in storage.
Described step (1) also comprises the step of preparation nickel plating graphite Ni-C conductive powder, at first prepares graphite particulate, after hydrophilic treatment, is adopting chemically coated nickel method to plate even nickel granular layer on its surface, forms nickel plating graphite Ni-C conduction microballon.
Described step (1) also comprises the step of preparation modified high-molecular silastic material, adopts hydroxy-end capped YSR 3286, under the Diisopropyl azodicarboxylate action of evocating; Carry out solution copolymerization with methylacrylic acid (ester) class; Obtain organic-silicon-modified methacrylic (ester) resin, it has snappiness, water-proof organosilicon segment, has good sticking power again; High with the conjugation of nickel plating graphite Ni-C conductive powder, good fluidity in the course of processing.
Described step (5) also comprises the operation under the mold pressing situation: the sizing material input that will open after the refining is solidified machine, is that 165 ℃, pressure are under the 170Kg condition in temperature, and sizing material is pressed into die for molding, and be 120-160 second set time, and depanning makes the curing blob of viscose;
Described step (6) also comprises the cured prod to making, and is 180 ℃ in temperature, and regelate is handled under the recirculated air condition, and be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of product, finally makes the conductive polymer shielding product after the setting.
A kind of conductive polymer shielding material of implementing the said preparation method of aforesaid method step; It is characterized in that; Its starting material by following weight ratio are processed: nickel plating graphite Ni-C conductive powder 1: modified high-molecular silastic material 3; Wherein said nickel plating graphite Ni-C conductive powder is a nickel plating graphite Ni-C conduction microballon, and described modified high-molecular silastic material is organic-silicon-modified methacrylic (ester) resin.
Described conductive polymer shielding material is characterized in that its volume resistance is less than 10 ohmcms, and specific conductivity is greater than 0.001S/m.
The goods of described conductive polymer shielding material is characterized in that, it comprises a body; This body is provided with a cavity layer; Be filled with described conductive polymer shielding material elastomerics in this cavity layer, its packing ratio is 1.2:1, and conductive polymer shielding material elastomerics is closely contacted with cavity wall; Form enclosed space and favorable conductive path, realize, waterproof effect airtight, dustproof, moistureproof spatial in the body.
The goods of described conductive polymer shielding material is characterized in that, it is high-frequency high-speed communication electric connector.
Beneficial effect of the present invention: the application of preparing method's preparing product in the higher frequency electromagnetic field through the conductive polymer shielding material both can reach the problem that solves electromagnetic-wave leakage; Also can use simultaneously the waterproof of macromolecular material itself; Protection against the tide, the dust-proof function forms an airtight independent electromagnetic space with whole guarded space; Both protected electromagnetic signal, avoided the pollution of hertzian wave again surrounding enviroment.The siliconoxygen bond stability of polymer Zylox is very good; Therefore this series products correspondence does not have particular requirement with environment, even in abominable open-air atmosphere, under the prerequisite of not losing its inherent function; Also have and reach the work-ing life in 10 years, product performance stable very good.
Description of drawings
Fig. 1 preparation technology's method flow of the present invention synoptic diagram;
The curve synoptic diagram of Fig. 2 product material rate elongation of the present invention.
Embodiment
Referring to Fig. 1 and Fig. 2, the preparation method of a kind of conductive polymer shielding material that the embodiment of the invention provides comprises following method steps:
A kind of preparation method of conductive polymer shielding material is characterized in that, comprises following method steps:
(1) raw material preparing: prepare nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material respectively;
(2) take by weighing material: the weight according to nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material 1:3 takes by weighing, and is subsequent use;
(3) carry out banburying: with Banbury mixer preheating 10 minutes, stablize 5 fens clock times after, add the modified high-molecular silastic material earlier, and then add nickel plating graphite Ni-C conductive powder, at the discharge after 5-20 minute of maintenance rotating speed 60-80rpm under, make glue stuff compounding;
(4) open refining: 2-3mm is transferred in the roll spacing of mill, turns on the power switch, make the mill running; Open the recirculated water valve, will throw into mill from the sizing material that Banbury mixer is discharged again and wrap roller, further mixing; Mix until sizing material, material surface is glossy, discharges sizing material;
(5) curing molding: the sizing material that will open after the refining drops into the precision extrusion molding machine; In temperature is that 300 ℃, pressure are under the 6.5Mpa condition; Extruded velocity is 13 ~ 17cm/min; Be 8-12 second set time, and sizing material is extruded, and the forming area through mould under condition of cure is molded into the conductive articles with shielding properties;
(6) regelate is handled: to the cured prod that makes, be 180 ℃ in temperature, solidify once more under the recirculated air condition that be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of cured prod, finally make the conductive polymer shielding product after the setting.
(7) the conductive polymer shielding material sheet that makes is checked, sealed and put in storage.
Described step (1) also comprises the step of preparation nickel plating graphite Ni-C conductive powder, at first prepares graphite particulate, after hydrophilic treatment, is adopting chemically coated nickel method to plate even nickel granular layer on its surface, forms nickel plating graphite Ni-C conduction microballon.
Described step (1) also comprises the step of preparation modified high-molecular silastic material, adopts hydroxy-end capped YSR 3286, under the Diisopropyl azodicarboxylate action of evocating; Carry out solution copolymerization with methylacrylic acid (ester) class; Obtain organic-silicon-modified methacrylic (ester) resin, it has snappiness, water-proof organosilicon segment, has good sticking power again; High with the conjugation of nickel plating graphite Ni-C conductive powder, good fluidity in the course of processing.
Described step (5) also comprises the operation under the mold pressing situation: the sizing material that will open after the refining drops into shaper, is that 165 ℃, pressure are under the 170Kg condition in temperature, and sizing material is pressed into die for molding, and be 120-160 second set time, and depanning makes the curing blob of viscose;
Described step (6) also comprises the cured prod to making, and is 180 ℃ in temperature, and regelate is handled under the recirculated air condition, and be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of product, finally makes the conductive polymer shielding product after the setting.
A kind of conductive polymer shielding material of implementing the said preparation method of aforesaid method step; It is characterized in that; Its starting material by following weight ratio are processed: nickel plating graphite Ni-C conductive powder 1: modified high-molecular silastic material 3; Wherein said nickel plating graphite Ni-C conductive powder is a nickel plating graphite Ni-C conduction microballon, and described modified high-molecular silastic material is organic-silicon-modified methacrylic (ester) resin.
Described conductive polymer shielding material is characterized in that its volume resistance is less than 10 ohmcms, and specific conductivity is greater than 0.001S/m.
The goods of described conductive polymer shielding material is characterized in that, it comprises a body; This body is provided with a cavity layer; Be filled with described conductive polymer shielding material elastomerics in this cavity layer, its packing ratio is 1.2:1, and conductive polymer shielding material elastomerics is closely contacted with cavity wall; Form enclosed space and favorable conductive path, realize, waterproof effect airtight, dustproof, moistureproof spatial in the body.
The goods of described conductive polymer shielding material is characterized in that, it is high-frequency high-speed communication electric connector.
Referring to Fig. 1 and Fig. 2, macromolecule conducting material of the present invention is to be matrix with the polymer silastic material, is packing material with a certain proportion of micron-sized conductive particle, and the mixture making the finished product that form before mixing through a series of object.This moment this material state also do not possess the rerum natura and the function that will reach.The occasion of bonded products practical application, the design function product uses shape, adopts the different production process stempressing and extrudes; Production unit, working condition temperature, pressure; Set time,, produce the most at last and have the conducting function high performance elastomer through complicated curing molding process.This high-performance conductive elastomerics has the certain compression ratio example when using, this will make elastomerics better contact with cavity wall, thereby form the path of enclosed space and conduction, and realization is dustproof to enclosed space, protection against the tide, waterproof.When the conductive elastomer rubber product was in the high-frequency electromagnetic wave field, the unbound electron free movement of conductive particle formed the EM field opposite with external electromagnetic field, and interior external electromagnetic field is cancelled each other, and reaches the influence that slackens EMI, is referred to as reflection interference; Unbound electron forms electric current during simultaneously owing to electromagnetic the existence in moving process, because conducting particles has certain resistance, produces heat energy, has slackened electromagnetic interference wave, is referred to as to disturb in absorbing.
Referring to Fig. 2; Wherein be that conductive polymer shielding material of the present invention has fine prolongation performance; Represented the material rate elongation curve synoptic diagram of invention, wherein represented extraneous stress, the corresponding variation of the prolongation of this product size from 0-260% from the 0-1100KPA variation range.
Polymer Zylox is good isolator, and volume resistance is greater than 10
14Ohmcm, the rubber that conductive particle is filled can provide good electrical conductivity under certain pressure, and when volume resistance was lower than 10 ohmcms, conductive rubber promptly had electro-magnetic screen function.The volume resistance of the conductive elastomer Zylox of this invention is lower than 0.1 ohmcm, and the high-frequency signal frequency of inhibition can reach 40GHZ, can realize the effectiveness of shielding value of deleting about 60dB in the high frequency band more than 200KHZ to GHZ.The important parameter that conductive polymer elastomer silicone rubber relates to has tensile strength, hardness, volume resistance, shielding value of deleting etc.
Wherein survey feeler mechanism's test through nickel/carbonaceous conductive silica gel through China, its hardness performance is good; (Report No.:SZPA101119578701); Its material rate elongation is functional; (Report S/N:MER20110728-001); For application and the product development of conductive polymer shielding material on the high frequency communication part provides the research foundation; Nickel/carbonaceous conductive screen rubber is surveyed feeler mechanism's test through China, and nickel/carbonaceous conductive Zylox 02SAH10 is the mixture packing material (nickel/carbon) of base-material with Zylox; Through the curing molding process, form the resilient material of electroconductibility; Nickel/carbonaceous conductive silicone elastomer not only has the extensive work temperature on the good performance, and anti-oxidant, stopping property is strong, and good electroconductibility and shield effectiveness are also arranged simultaneously; For the research and development of product provide favourable foundation and condition.
Utilizing the inventive method can produce co-extrusion type silicon conductive rubber structure is high-conductivity silicon rubber for skin, and inside is general high-performance silica gel.Compare with traditional extruded rubber bar, co-extrusion type silicon conductive rubber has: identical surface resistivity, close shielding properties, lower cost, better physical and mechanical properties.Can substitute traditional extruded rubber goods fully.
The present invention adopts the technology of EMI, leakage; The technology of electromagnetic shielding, compatibility; The technology of macromolecule conducting material; The application of conductive polymer shielding material in the higher frequency electromagnetic field is used for the conductive polymer shielding material of high-frequency high-speed communication part and the technology of the concrete design of product, the detection of conductive polymer shielding material.
Electromagnetic compatibility just is meant that certain electronics neither disturbs miscellaneous equipment, does not also receive the influence of miscellaneous equipment simultaneously.Electromagnetic compatibility is the same with the security that we are familiar with, and is one of most important index of quality product.Security relates to the person and property, and electromagnetic compatibility then relates to the person and environment protection.Shielding is exactly isolating between two area of space, with control electric field, magnetic field and hertzian wave by a zone to another regional induction and radiation.Tool is exactly to be surrounded with the interfering source of shielding with component, circuit, subassembly, cable or total system, prevents that interfere with electromagnetic field is to external diffusion; With shielding receiving circuit, equipment or system are surrounded, prevent that them from receiving the influence of external electromagnetic field.Because shielding absorbs energy eddy-current loss, reflected energy hertzian wave at the boundary reflection on the shielding with offset the energy electromagnetic induction and on screen layer, produce reverse EM field to all playing from the interference hertzian wave of outsides such as lead, cable, component, circuit or system and internal electrical magnetic wave; Can offset part and disturb electromagnetic effect, so shielding has the interferential of weakening function.
The present invention both can reach the problem that solves electromagnetic-wave leakage through the application of preparing method's preparing product in the higher frequency electromagnetic field of conductive polymer shielding material; Also can use simultaneously the waterproof of macromolecular material itself; Protection against the tide, the dust-proof function forms an airtight independent electromagnetic space with whole guarded space; Both protected electromagnetic signal, avoided the pollution of hertzian wave again surrounding enviroment.The siliconoxygen bond stability of polymer Zylox is very good; Therefore this series products correspondence does not have particular requirement with environment, even in abominable open-air atmosphere, under the prerequisite of not losing its inherent function; Also have and reach the work-ing life in 10 years, product performance stable very good.
The present invention does not relate to all identical with the prior art prior art that maybe can adopt of part and realizes.
The present invention is not limited to above-mentioned embodiment, adopts identical with the above embodiment of the present invention or proximate structure, and other the preparation method and the goods of conductive polymer shielding material that obtain, all within protection scope of the present invention.
Claims (9)
1. the preparation method of a conductive polymer shielding material is characterized in that, comprises following method steps:
(1) raw material preparing: prepare nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material respectively;
(2) take by weighing material: the weight according to nickel plating graphite Ni-C conductive powder and modified high-molecular silastic material 1:3 takes by weighing, and is subsequent use;
(3) carry out banburying: with Banbury mixer preheating 10 minutes, stablize 5 fens clock times after, add the modified high-molecular silastic material earlier, and then add nickel plating graphite Ni-C conductive powder, at the discharge after 5-20 minute of maintenance rotating speed 60-80rpm under, make glue stuff compounding;
(4) open refining: 2-3mm is transferred in the roll spacing of mill, turns on the power switch, make the mill running; Open the recirculated water valve, will throw into mill from the sizing material that Banbury mixer is discharged again and wrap roller, further mixing; Mix until sizing material, material surface is glossy, discharges sizing material;
(5) curing molding: the sizing material that will open after the refining drops into the precision extrusion molding machine; In temperature is that 300 ℃, pressure are under the 6.5Mpa condition; Extruded velocity is 13 ~ 17cm/min; Be 8-12 second set time, and sizing material is extruded, and the forming area through mould under condition of cure is molded into the conductive articles with shielding properties;
(6) regelate is handled: to the cured prod that makes, be 180 ℃ in temperature, solidify once more under the recirculated air condition that be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of cured prod, finally make the conductive polymer shielding product after the setting.
2. the preparation method of a kind of conductive polymer shielding material according to claim 1 is characterized in that, it also comprises step (7): the conductive polymer shielding material sheet that makes is checked, sealed and put in storage.
3. the preparation method of a kind of conductive polymer shielding material according to claim 1; It is characterized in that; Described step (1) also comprises the step of preparation nickel plating graphite Ni-C conductive powder, at first prepares graphite particulate, after hydrophilic treatment; Adopt chemically coated nickel method to plate even nickel granular layer on its surface, forming nickel plating graphite Ni-C conduction microballon.
4. the preparation method of a kind of conductive polymer shielding material according to claim 1 is characterized in that, described step (1) also comprises the step of preparation modified high-molecular silastic material; Adopt hydroxy-end capped YSR 3286; Under the Diisopropyl azodicarboxylate action of evocating, carry out solution copolymerization with methylacrylic acid (ester) class, obtain organic-silicon-modified methacrylic (ester) resin; It has snappiness, water-proof organosilicon segment; Have good sticking power again, high with the conjugation of nickel plating graphite Ni-C conductive powder, good fluidity in the course of processing.
5. the preparation method of a kind of conductive polymer shielding material according to claim 1 is characterized in that, described step (5); Also comprise the operation under the mold pressing situation: the sizing material that will open after the refining drops into shaper; In temperature is that 165 ℃, pressure are under the 170Kg condition, and sizing material is pressed into die for molding, and be 120-160 second set time; Depanning makes the curing blob of viscose;
Described step (6) also comprises the cured prod to making, and is 180 ℃ in temperature, and regelate is handled under the recirculated air condition, and be 4 ~ 6 hours set time, improves the rerum natura and the functional performance of product, finally makes the conductive polymer shielding product after the setting.
6. conductive polymer shielding material of implementing one of claim 1 ~ 5 said preparation method; It is characterized in that; Its starting material by following weight ratio are processed: nickel plating graphite Ni-C conductive powder 1: modified high-molecular silastic material 3; Wherein said nickel plating graphite Ni-C conductive powder is a nickel plating graphite Ni-C conduction microballon, and described modified high-molecular silastic material is organic-silicon-modified methacrylic (ester) resin.
7. conductive polymer shielding material according to claim 6 is characterized in that its volume resistance is less than 10 ohmcms, and specific conductivity is greater than 0.001S/m.
8. according to the goods of the described conductive polymer shielding material in one of claim 6 or 7, it is characterized in that it comprises a body; This body is provided with a cavity layer; Be filled with described conductive polymer shielding material elastomerics in this cavity layer, its packing ratio is 1.2:1, and conductive polymer shielding material elastomerics is closely contacted with cavity wall; Form enclosed space and favorable conductive path, realize, waterproof effect airtight, dustproof, moistureproof spatial in the body.
9. the goods of described conductive polymer shielding material one of according to Claim 8 is characterized in that it is a high-frequency high-speed communication electric connector.
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Application publication date: 20121114 |