CN101624468B - Conductive film of coating of high molecular polymer and preparation method thereof - Google Patents
Conductive film of coating of high molecular polymer and preparation method thereof Download PDFInfo
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- CN101624468B CN101624468B CN200910101378XA CN200910101378A CN101624468B CN 101624468 B CN101624468 B CN 101624468B CN 200910101378X A CN200910101378X A CN 200910101378XA CN 200910101378 A CN200910101378 A CN 200910101378A CN 101624468 B CN101624468 B CN 101624468B
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Abstract
The invention belongs to the field of the high molecular material, in particular to a conductive film of a coating of a high molecular polymer and a preparation method thereof. The conductive film comprises the main components of aromatic polyurethane resin and conductive carbon black and is prepared by a separation type paper transfer coating method, wherein pulp used in the coating comprises the following formula according to parts by weight: 100 parts of aromatic polyurethane resin, 120-160 parts of toluene, 50-140 parts of dimethyl formamide, 8-20 parts of conductive carbon black and 0.5-3 parts of dispersant. The preparation technology is advanced and reasonable and mainly comprises the steps of combining, grinding, coating and coiling, wherein a three-coating three-baking coater is adopted in the coating step, the single-layer coating quantity is 50-250g/m<2> (wet weight), and the clearance is 0.05-0.2 mm. The conductive film has favorable electrical property, physical property and uniform and stable resistance value.
Description
Technical field
The invention belongs to polymeric material field, particularly relate to the preparation method of a kind of conductive film of coating of high molecular polymer and conducting film.
Background technology
For a long time, plastics are considered to nonconducting isolator always.But the work of black square, mark's Diarmid and Bai Chuanying tree has changed the view of people to plastics.In fact, under certain condition, plastics can conduct electricity as metal, and this discovery causes the birth that today, plastic electronic was learned.Its birth also makes the hardware of computingmachine and information science, to the less molecular device development of size, correspondingly makes the speed and storage capacity expansion 10 of computingmachine from the ultra-large integrated chip of inorganic semiconductor
8Doubly.In the near future, plastic semiconductor will be applied in many-side more, like handset displays screen, large flat display screen, collapsible computer screen, solar cell etc.
Conductive plastics can be divided into two big types at present: conducing composite material and structural conductive plastics.Conducing composite material is to be external phase with the resin; With powder filler (like carbon black, metal powder, graphite etc.), electro-conductive fiber, nanoparticle, CNT and nanofiber as disperse phase; Material (or product) according to the plastic shaping complete processing is processed mainly is used as antistatic and electromagnetic shielding goods.Its goods not only moulding are easy, and reliable in quality, widespread use in mine, electronics, electrical equipment industry.The structural conductive plastics are to have the macromolecular material of conjugated double bond, through the high-performance conductive plastics of the preparation of mixing, and its excellent performance, specific conductivity height, the specific conductivity that has even surpass steel.But its processing difficulties, cost costliness, still there are numerous technical barriers in practical application, is the emphasis of researching and developing at present.
Along with home market screening of nucleus material develops towards the high, precision and frontier direction, the screening of nucleus material of new generation that merges conglomeraties such as electronics, plastics, coating becomes the market development and trend of application.It is technical that this type material is mainly used in middle and high end electronic machine, precision equipment, transmitter and electromagnetic shielding etc., has favorable conductive and screening of nucleus effect, also can be applied in the wrapping material field of medical facilities.
Screening of nucleus in the existing market and packaging group material form through coating such as electro-conductive material and shielded metal material or plated film for macromolecule plastic film mostly; Processing mode is complicated; Cost is high; Particularly resistance value and some other physicals can not satisfy application requiring, and market receives certain restriction.
Summary of the invention
The present invention is directed to the deficiency that above-mentioned prior art exists; A kind of conductive film of coating of high molecular polymer has been proposed; It combines macromolecule plastic film and electro-conductive material together, and the resistance value of product is able to optimize with other physicalies, can satisfy many-sided needs of using; The preparation method of this conducting film has been proposed simultaneously.
The technical scheme that technical solution problem of the present invention is taked is:
A kind of conductive film of coating of high molecular polymer, main component is aromatic urethane resin and graphitized carbon black, is prepared from the transfer coated method of separate-type paper, the prescription of its floating coat slurry therewith is following, in weight part:
Aromatic urethane resin 100
Toluene 120～160
N 50～140
Graphitized carbon black 8～20
Dispersion agent 0.5～3.
Said graphitized carbon black is that high electric conductivity carbon black, super conducting furnace black, spy are led one or more in furnace black and the acetylene black.
Said dispersion agent is one or more in the macromolecular compound with active group, low-molecular-weight alkaline polymeric amide cationic dispersing agent and diethanolamine of fat acyl non-ionic dispersing agent and the hyper-dispersant.
Described macromolecular compound with active group is the naphthalenesulfonate polycondensate, preferred sodium naphthalene sulfonate and the polycondensate of formaldehyde or the polycondensate of naphthalene sulfonic acid potassium and formaldehyde.
The Disper-130 dispersion agent of the preferred German BYK of described low-molecular-weight alkaline polymeric amide cationic dispersing agent company.
Described hyper-dispersant is meant the dispersion agent of anchorage formula, Solsperse-3000, Solsperse-9000 or the Solsperse-13940 of preferred Britain ICI company.
A kind of preparation method of said conductive film of coating of high molecular polymer adopts the transfer coated method of separate-type paper, comprises fusion, grinding, coating and rolling step:
(1) merge: accurately take by weighing the aromatic urethane resin and place stirring tank, and add N successively, graphitized carbon black and toluene; Airtight stirring tank makes the interior material of still fully soak into, merge, and time of fusion was controlled at 72～96 hours; Wherein the consumption of each component meets the requirement of following prescription by weight:
Aromatic urethane resin 100
Toluene 120～160
N 50～140
Graphitized carbon black 8～20
Dispersion agent 0.5～3;
(2) grind: through fully soaking into, merging after, by above-mentioned prescription requirement adding dispersion agent, fully stirring and with the three-roll grinder grinding is filtered then and is made coating and use slurry; Grind number of times 2～5 times, roller speed ratio 1: 3: 9, several 150～240 orders of filter screen order;
(3) coating: adopt three-coat three-baking coating machine and separate-type paper transfer coating method; Be coated with surface layer earlier, glue spread is 50～250g/m
2(weight in wet base), cutter then gets into oven drying, 90～150 ℃ of temperature, time 1.5～5min apart from 0.05～0.2mm; Be coated with the middle level again, barrier coating then, processing requirement is identical with the surface layer coating;
(4) rolling: separate separate-type paper after accomplishing coating, batch then and pack; Batching time control controlling rolling tension force is 2.5～3.0Mpa.
In the said fusion steps, the consumption of each component is preferably by weight: 100 parts of aromatic urethane resins, 120 parts of toluene, 80 parts of Ns, 8 parts of graphitized carbon blacks, 1 part of dispersion agent.
In the said coating step, the glue spread of preferred surface layer, middle level and bottom is respectively 100～200g/m
2(weight in wet base), cutter is apart from 0.1～0.15mm, 100～120 ℃ of oven drying temperature, time 2.5～4min.
In the said coating step, more preferably the glue spread of surface layer, middle level and bottom is respectively 140～160g/m
2(weight in wet base), cutter is apart from 0.12～0.13mm.
The present invention is starting material with fine high electric conductivity carbon black and the soft aromatic urethane resin of low modulus, adopts the transfer coated method of separate-type paper to be prepared from; Coating with the pulp preparation process in, adopted organic solvent soaking method and three roller polishings, wherein solvent is selected toluene and N for use, technology is advanced rationally, the slurry fineness is good.Thereby make the resistance value stable homogeneous of product.
Product of the present invention has good electrical properties and physicals, and its key technical indexes is:
1. breaking tenacity: >=18N,
2. resistance: (200～300) Ω ± 20 Ω/6cm,
3. working temperature :-20～80 ℃,
4. total thickness: 0.25～0.5mm,
5. dissolvent residual rate :≤0.5%.
Description of drawings
Accompanying drawing is a kind of embodiment process flow diagram of preparation method of the present invention.
Embodiment
Embodiment 1: the working method of conductive film of coating of high molecular polymer
The prescription of slurry is as follows by weight: 100 parts of aromatic urethane resins, 120 parts of toluene, 80 parts of Ns, 8 parts of high electric conductivity carbon blacks, 1 part of sodium naphthalene sulfonate and formaldehyde condensation products.
Shown in accompanying drawing, production process mainly comprises fusion, grinding, coating and rolling step: (1) accurately takes by weighing the aromatic urethane resin and places stirring tank for 100 parts, and adds 120 parts of 80 parts of Ns, 8 parts of high electric conductivity carbon blacks and toluene successively; When adding the high electric conductivity carbon black, need from the aperture of stirring tank top, slowly to pour into; Airtight then stirring tank makes the interior material of still fully soak into, merge, and time of fusion is controlled to be 80 hours.(2) after fully soaking into, merging, add 1 part of naphthalenesulfonate polycondensate, fully stir and grind with three-roll grinder, grind roller speed ratio 1: 3: 93 times; Cross then and filter slurry, several 200 orders of filter screen order.(3) adopt three-coat three-baking coating machine and separate-type paper transfer coating method; Be coated with surface layer earlier, glue spread is 150g/m
2(weight in wet base), cutter then get into oven drying apart from 0.1mm, 120 ℃ of temperature, time 3min; Be coated with the middle level again, barrier coating then, processing requirement is identical with the surface layer coating.(4) separate separate-type paper after the completion coating, batch then and pack; Batching time control controlling rolling tension force is 2.5Mpa.
Through measuring the gained the key technical indexes be:
1. breaking tenacity: 21N,
2. resistance: 250 Ω/6cm,
3. working temperature :-20～80 ℃,
4. total thickness: 0.27mm,
5. dissolvent residual rate :≤0.5%.
Embodiment 2: the working method of conductive film of coating of high molecular polymer
The prescription of slurry is as follows by weight: 100 parts of aromatic urethane resins, 110 parts of toluene, 85 parts of Ns, 9 parts of high electric conductivity carbon blacks, 1.5 parts of Disper-130 dispersion agents.
Shown in accompanying drawing, production process mainly comprises fusion, grinding, coating and rolling step: (1) accurately takes by weighing the aromatic urethane resin and places stirring tank for 100 parts, and adds 110 parts of 85 parts of Ns, 9 parts of high electric conductivity carbon blacks and toluene successively; When adding the high electric conductivity carbon black, from the aperture of stirring tank top, slowly pour into; Airtight then stirring tank makes the interior material of still fully soak into, merge, and time of fusion is controlled to be 90 hours.(2) after fully soaking into, merging, add 1.5 parts of Disper-130 dispersion agents, fully stir and grind with three-roll grinder, grind roller speed ratio 1: 3: 94 times; Cross then and filter slurry, several 200 orders of filter screen order.(3) adopt three-coat three-baking coating machine and separate-type paper transfer coating method; Be coated with surface layer earlier, glue spread is 155g/m
2(weight in wet base), cutter then get into oven drying apart from 0.1mm, 125 ℃ of temperature, time 3.5min; Be coated with the middle level again, barrier coating then, processing requirement is identical with the surface layer coating.(4) separate separate-type paper after the completion coating, batch then and pack; Batching time control controlling rolling tension force is 2.5Mpa.
Through measuring the gained the key technical indexes be:
1. breaking tenacity: 23N,
2. resistance: 250 Ω/6cm,
3. working temperature :-20～80 ℃,
4. total thickness: 0.27mm,
5. dissolvent residual rate :≤0.5%.
Embodiment 3: the working method of conductive film of coating of high molecular polymer
The prescription of slurry is with embodiment 2.
Shown in accompanying drawing, production process mainly comprises fusion, grinding, coating and rolling step: wherein step (1) is with embodiment 2.(2) after fully soaking into, merging, add 1.5 parts of Disper-130 dispersion agents, fully stir and grind with three-roll grinder, grind roller speed ratio 1: 3: 93 times; Cross then and filter slurry, several 200 orders of filter screen order.(3) adopt three-coat three-baking coating machine and separate-type paper transfer coating method; Be coated with surface layer earlier, glue spread is 160g/m
2(weight in wet base), cutter then get into oven drying apart from 0.12mm, 130 ℃ of temperature, time 3.5min; Be coated with the middle level again, barrier coating then, processing requirement is identical with the surface layer coating.(4) separate separate-type paper after the completion coating, batch then and pack; Batching time control controlling rolling tension force is 2.5Mpa.
Through measuring the gained the key technical indexes be:
1. breaking tenacity: 26N,
2. resistance: 260 Ω/6cm,
3. working temperature :-20～80 ℃,
4. total thickness: 0.30mm,
5. dissolvent residual rate :≤0.5%.
Embodiment 4: conductive film of coating of high molecular polymer
Coating is following with the prescription of slurry, in weight part: 100 parts of aromatic urethane resins, 120 parts of toluene, 120 parts of Ns, 8 parts of high electric conductivity carbon blacks, 2 parts of the polycondensates of sodium naphthalene sulfonate and formaldehyde.The breaking tenacity of conducting film finished product reaches 18N, resistance 230 Ω/6cm, product thickness 0.26mm.
Embodiment 5: conductive film of coating of high molecular polymer
Coating is following with the prescription of slurry, in weight part: 100 parts of aromatic urethane resins, 100 parts of toluene, 120 parts of Ns, 8 parts of super conducting furnace blacks, 2 parts of Solsperse-9000 dispersion agents.The breaking tenacity of finished product reaches 21N, resistance 250 Ω/6cm, product thickness 0.28mm.
Embodiment 6: conductive film of coating of high molecular polymer
Coating is following with the prescription of slurry, in weight part: 100 parts of aromatic urethane resins, 100 parts of toluene, 100 parts of Ns, 10 parts of high electric conductivity carbon blacks, 3 parts of diethanolamine of fat acyl.The breaking tenacity of finished product reaches 26N, resistance 280 Ω/6cm, product thickness 0.30mm.
Embodiment 7: conductive film of coating of high molecular polymer
Coating is following with the prescription of slurry, in weight part: 100 parts of aromatic urethane resins, 150 parts of toluene, 100 parts of Ns, 10 parts of acetylene blacks, 3 parts of diethanolamine of fat acyl.The breaking tenacity of finished product reaches 24N, resistance 290 Ω/6cm, product thickness 0.36mm.
Embodiment 8: conductive film of coating of high molecular polymer
Coating is following with the prescription of slurry, in weight part: 100 parts of aromatic urethane resins, 150 parts of toluene, 140 parts of Ns, 10 parts of high electric conductivity carbon blacks, 2 parts of diethanolamine of fat acyl.The breaking tenacity of finished product reaches 22N, resistance 295 Ω/6cm, product thickness 0.33mm.
Claims (7)
1. conductive film of coating of high molecular polymer, component comprises aromatic urethane resin and graphitized carbon black, it is characterized in that, is prepared from the transfer coated method of separate-type paper, the prescription of its floating coat slurry therewith is following, in weight part:
2. conductive film of coating of high molecular polymer according to claim 1 is characterized in that, said graphitized carbon black is that high electric conductivity carbon black, super conducting furnace black, spy are led one or more in furnace black and the acetylene black.
3. conductive film of coating of high molecular polymer according to claim 1 is characterized in that, the polycondensate that described naphthalenesulfonate polycondensate is sodium naphthalene sulfonate and formaldehyde or the polycondensate of naphthalene sulfonic acid potassium and formaldehyde; The dispersion agent of described anchorage formula is Solsperse-3000, Solsperse-9000 or Solsperse-13940.
4. according to the preparation method of any described conductive film of coating of high molecular polymer of claim 1-3, it is characterized in that, adopt the transfer coated method of separate-type paper, comprise fusion, grinding, coating and rolling step:
(1) merge: accurately take by weighing the aromatic urethane resin and place stirring tank, and add N successively, graphitized carbon black and toluene; Airtight stirring tank makes the interior material of still fully soak into, merge, and time of fusion was controlled at 72～96 hours; Wherein the consumption of each component meets the requirement of following prescription by weight:
(2) grind: through fully soaking into, merging after, by above-mentioned prescription requirement adding dispersion agent, fully stirring and with the three-roll grinder grinding is filtered then and is made coating and use slurry; Grind number of times 2～5 times, roller speed ratio 1: 3: 9, several 150～240 orders of filter screen order;
(3) coating: adopt three-coat three-baking coating machine and separate-type paper transfer coating method; Be coated with surface layer earlier, glue spread is 50～250g/m
2, cutter then gets into oven drying, 90～150 ℃ of temperature, time 1.5～5min apart from 0.05～0.2mm; Be coated with the middle level again, barrier coating then, processing requirement is identical with the surface layer coating;
(4) rolling: separate separate-type paper after accomplishing coating, batch then and pack; Batching time control controlling rolling tension force is 2.5～3.0Mpa.
5. the preparation method of conductive film of coating of high molecular polymer according to claim 4 is characterized in that, in the said fusion steps, the consumption of each component meets the requirement of following prescription by weight:
6. according to the preparation method of claim 4 or 5 described conductive film of coating of high molecular polymer, it is characterized in that in the said coating step, the glue spread of surface layer, middle level and bottom is respectively 100～200g/m
2, cutter is apart from 0.1～0.15mm, 100～120 ℃ of oven drying temperature, time 2.5～4min.
7. according to the preparation method of claim 4,5 or 6 described conductive film of coating of high molecular polymer, it is characterized in that in the said coating step, the glue spread of surface layer, middle level and bottom is respectively 140～160g/m
2, cutter is apart from 0.12～0.13mm.
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Owner name: ZHEJIANG JINDA NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: HAINING JIEMA HI-TECH COATED FABRICS CO., LTD. Effective date: 20140212 |
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