CN105401484A - Absorptive-type electromagnetic shielding paper and preparation method thereof - Google Patents
Absorptive-type electromagnetic shielding paper and preparation method thereof Download PDFInfo
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- CN105401484A CN105401484A CN201510713239.8A CN201510713239A CN105401484A CN 105401484 A CN105401484 A CN 105401484A CN 201510713239 A CN201510713239 A CN 201510713239A CN 105401484 A CN105401484 A CN 105401484A
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- electromagnetic shielding
- shielding paper
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- ferrite
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
- D21H15/12—Composite fibres partly organic, partly inorganic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/143—Agents preventing ageing of paper, e.g. radiation absorbing substances
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Paper (AREA)
Abstract
The invention relates to absorptive-type electromagnetic shielding paper and a preparation method thereof. The absorptive-type electromagnetic shielding paper comprises a composite absorbent component and a skeleton component, wherein the composite absorbent component is prepared from the following raw materials in percentage by mass: 12%-48% of nickel powder, 8%-32% of silicon carbide and 20%-80% of ferrite/glass fiber; and the skeleton component is a plant fiber. The absorptive-type electromagnetic shielding paper provided by the invention is capable of absorbing and suppressing secondary reflection clutter, and is high in high-frequency electromagnetic shielding effectiveness, simple in preparation technology and relatively low in cost.
Description
Technical field
The present invention relates to a kind of electromagnetic shielding paper and preparation method thereof, particularly relate to a kind of absorption-type electromagnetic shielding paper and preparation method thereof.
Background technology
Nowadays, the problems such as electromagnetic pollution harmful to human are increasingly serious, and research and production is efficient, the electromagnetic shielding of lightweight, absorbing material are extremely urgent.Electromagnetic shielding paper, as a kind of performance function paper, can be used for the electromagnetic shielding of high-accuracy property, highly sensitive electronic equipment.
Electromagnetic shielding paper common is at present mainly carbon fiber electrically magnetic screen paper, comprise carbon fiber, string and conductive particle, key step is mixed with string by carbon fiber, and add dispersant and make cotton pulp, slagging-off after and conductive powder Homogeneous phase mixing disperse, after manufacturing paper with pulp, ground paper is dried.This carbon fiber shielding paper has good effectiveness, but there is following shortcoming: (1) carbon fiber is graphite Turbostratic, be made up of the nonpolar covalent bond of C-C, surface active groups is few, hydrophobicity is strong, need a large amount of dispersant that uses to disperse, cause the cost of carbon fiber electrically magnetic screen paper higher; (2) carbon fiber electrically magnetic screen paper can not suppress secondary reflection clutter, frequency electromagnetic waves shield effectiveness low, applies limited.
Summary of the invention
Main purpose of the present invention is, provides a kind of novel absorption-type electromagnetic shielding paper and preparation method thereof, and technical problem to be solved is that its frequency electromagnetic waves shield effectiveness is improved, thus is more suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of absorption-type electromagnetic shielding paper that the present invention proposes, comprise composite wave-absorbing agent component and backbone moiety, wherein said composite wave-absorbing agent component is made up of the raw material of following mass percent: nickel powder 12-48%, carborundum 8-32%, ferrite/glass fibre 20-80%.
Preferably, aforesaid absorption-type electromagnetic shielding paper, wherein said nickel powder is the extra-fine nickel powder of diameter 0.8-1.2um.
Preferably, aforesaid absorption-type electromagnetic shielding paper, wherein said carborundum is beta silicon carbide, and particle diameter is 0.8-1.2um.
Preferably, aforesaid absorption-type electromagnetic shielding paper, wherein said ferrite/glass fiber diameter is 18-22um, and cut lengths are 2-3mm; Wherein, ferrite is mainly barium ferrite, and glass fibre is E glass ingredient.
Preferably, aforesaid absorption-type electromagnetic shielding paper, wherein said backbone moiety is string.
Preferably, aforesaid absorption-type electromagnetic shielding paper, in dry finish, the mass percentage of wherein said composite wave-absorbing agent component is 50%-60%, and the mass percentage of backbone moiety is 40%-50%.
Preferably, aforesaid absorption-type electromagnetic shielding paper, wherein said thickness is 30-40um, and surface density is 80-100g/m
2.
The invention allows for a kind of preparation method of absorption-type electromagnetic shielding paper, it is characterized in that, comprising:
(1) stir with carborundum and ferrite/glass fibre after nickel powder carries out dielectric process, obtained composite wave-absorbing agent, described composite wave-absorbing agent component is made up of the raw material of following mass percent: nickel powder 12-48%, carborundum 8-32%, ferrite/glass fibre 20-80%;
(2) composite wave-absorbing agent component is mixed formation slurry with string in water;
(3) slurry is discongested, and the sizing material forming after discongesting obtains electromagnetic shielding paper.
Preferably, the preparation method of aforesaid absorption-type electromagnetic shielding paper, wherein said nickel powder is the extra-fine nickel powder of diameter 0.8-1.2um; And/or
Wherein said carborundum is beta silicon carbide, and particle diameter is 0.8-1.2um; And/or
Wherein said ferrite/glass fibre, wherein ferrite is mainly barium ferrite, and glass fibre is E glass ingredient; And/or
Wherein said backbone moiety is string.
Preferably, the preparation method of aforesaid absorption-type electromagnetic shielding paper, it is characterized in that, described slurry adds cationic polyacrylamide and tributyl phosphate when discongesting, wherein, the addition of cationic polyacrylamide is no more than 5% of stock quality, and the addition of tributyl phosphate is no more than 1% of stock quality.
By technique scheme, absorption-type electromagnetic shielding paper of the present invention and preparation method thereof at least has following advantages:
Absorption-type electromagnetic shielding paper Absorbable rod of the present invention suppresses secondary reflection clutter, frequency electromagnetic waves shield effectiveness high, and preparation technology is simple, and cost is lower.Adopt arc method to test its absorbing property, test result is optimal absorption peak value-44dB, and the bandwidth of 18GHz internal reflection rate <-30dB is 4.3GHz, has good engineering and economic benefit prospect.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of description, be described in detail as follows below with preferred embodiment of the present invention.
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with preferred embodiment, to the absorption-type electromagnetic shielding paper proposed according to the present invention and preparation method thereof its detailed description of the invention, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
A kind of absorption-type electromagnetic shielding paper that one embodiment of the present of invention propose, comprise composite wave-absorbing agent component and backbone moiety, the mass percentage of described composite wave-absorbing agent component is 50%-60%, and the mass percentage of backbone moiety is 40%-50%.Wherein said composite wave-absorbing agent component is made up of the raw material of following mass percent: nickel powder 12-48%, carborundum 8-32%, ferrite/glass fibre 20-80%; Described backbone moiety is string.Preferably, described nickel powder is the extra-fine nickel powder of diameter 0.8-1.2um.Described carborundum is beta silicon carbide, and particle diameter is 0.8-1.2um.Described ferrite/glass fiber diameter is 18-22um, and cut lengths are 2-3mm, and wherein, ferrite is mainly barium ferrite, and glass fibre is E glass ingredient.
Embodiments of the invention also propose a kind of preparation method of absorption-type electromagnetic shielding paper, comprise: extra-fine nickel powder is carried out dielectric process, be dipped in ethanolic solution, dispersed with stirring 2 hours, instilling mass percentage concentration is gradually the teos solution of 1%-4%, after question response, filter cleaning and drying; Stir with carborundum and ferrite/glass fibre after extra-fine nickel powder carries out dielectric process, obtained composite wave-absorbing agent; Composite wave-absorbing agent component is mixed formation slurry with string; Slurry is discongested, and adds cationic polyacrylamide and tributyl phosphate, and wherein said cationic polyacrylamide is dispersant, and addition is no more than 5% of stock quality, and tributyl phosphate is defoamer, and addition is no more than 1% of stock quality; Sizing material forming after discongesting obtains electromagnetic shielding paper.
Preferably, the preparation method of the absorption-type electromagnetic shielding paper that another embodiment of the present invention proposes, wherein, described extra-fine nickel powder dielectric is treated to: be dipped in by extra-fine nickel powder 100g in 500mL absolute ethyl alcohol, with motor dispersed with stirring 2h, instill the teos solution 100mL that mass percentage concentration is 2% gradually, after question response, filter, clean, and be placed in 70 DEG C of vacuum constant-temperature container drying for standby.
Described in above-described embodiment, take extra-fine nickel powder, carborundum and ferrite/glass fibre and prepare composite wave-absorbing agent, with mixer, joined composite wave-absorbing agent is mixed, and be placed in standing paste sample in proportion with bleaching needle-point leaf pulp and discongest device, add 1% cationic polyacrylamide and consumption be 0.01% tributyl phosphate (mass fraction of auxiliary agent and raw material is all relative to dry finish), fully discongest rear former and be pressed.
Preferably, the preparation method of the absorption-type electromagnetic shielding paper that another embodiment of the present invention proposes, wherein, described extra-fine nickel powder dielectric is treated to: be dipped in by extra-fine nickel powder 100g in 500mL absolute ethyl alcohol, with motor dispersed with stirring 2h, instill the teos solution 100mL that mass percentage concentration is 1% gradually, after question response, filter, clean, and be placed in 70 DEG C of vacuum constant-temperature container drying for standby.
Described in above-described embodiment, take extra-fine nickel powder, carborundum and ferrite/glass fibre and prepare composite wave-absorbing agent, with mixer, joined composite wave-absorbing agent is mixed, and be placed in standing paste sample with grass fiber slurries in proportion and discongest device, add 5% cationic polyacrylamide and consumption be 1% tributyl phosphate (mass fraction of auxiliary agent and raw material is all relative to dry finish), fully discongest rear former and be pressed.
Preferably, the preparation method of the absorption-type electromagnetic shielding paper that another embodiment of the present invention proposes, wherein, described extra-fine nickel powder dielectric is treated to: be dipped in by extra-fine nickel powder 100g in 500mL absolute ethyl alcohol, with motor dispersed with stirring 2h, instill the teos solution 100mL that mass percentage concentration is 4% gradually, after question response, filter, clean, and be placed in 70 DEG C of vacuum constant-temperature container drying for standby.
Described in above-described embodiment, take extra-fine nickel powder, carborundum and ferrite/glass fibre and prepare composite wave-absorbing agent, with mixer, joined composite wave-absorbing agent is mixed, and be placed in standing paste sample with bamboo fibre slurries in proportion and discongest device, add 2% cationic polyacrylamide and consumption be 0.3% tributyl phosphate (mass fraction of auxiliary agent and raw material is all relative to dry finish), fully discongest rear former and be pressed.
According to above-described embodiment method, the following instance of the absorption-type electromagnetic shielding paper prepared, its concrete composition and electromagnetic performance as shown in the table.
The above, it is only preferred embodiment of the present invention, not do any pro forma restriction to the present invention, any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. an absorption-type electromagnetic shielding paper, comprise composite wave-absorbing agent component and backbone moiety, it is characterized in that, described composite wave-absorbing agent component is made up of the raw material of following mass percent: nickel powder 12-48%, carborundum 8-32%, ferrite/glass fibre 20-80%.
2. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, described nickel powder is the extra-fine nickel powder of diameter 0.8-1.2um.
3. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, described carborundum is beta silicon carbide, and particle diameter is 0.8-1.2um.
4. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, described ferrite/glass fiber diameter is 18-22um, and cut lengths are 2-3mm; Wherein, ferrite is mainly barium ferrite, and glass fibre is E glass ingredient.
5. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, described backbone moiety is string.
6. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, in dry finish, the mass percentage of described composite wave-absorbing agent component is 50%-60%, and the mass percentage of backbone moiety is 40%-50%.
7. absorption-type electromagnetic shielding paper according to claim 1, is characterized in that, described thickness a is 30-40um, and surface density is 80-100g/m
2.
8. a preparation method for absorption-type electromagnetic shielding paper, is characterized in that, comprising:
Stir with carborundum and ferrite/glass fibre after nickel powder carries out dielectric process, obtained composite wave-absorbing agent, described composite wave-absorbing agent component is made up of the raw material of following mass percent: nickel powder 12-48%, carborundum 8-32%, ferrite/glass fibre 20-80%;
Composite wave-absorbing agent component is mixed formation slurry with string in water;
Slurry is discongested, and the sizing material forming after discongesting obtains electromagnetic shielding paper.
9. the preparation method of absorption-type electromagnetic shielding paper according to claim 8, is characterized in that, described nickel powder is the extra-fine nickel powder of diameter 0.8-1.2um; And/or
Described carborundum is beta silicon carbide, and particle diameter is 0.8-1.2um; And/or
Described ferrite/glass fibre, wherein ferrite is mainly barium ferrite, and glass fibre is E glass ingredient; And/or
Described backbone moiety is string.
10. the preparation method of absorption-type electromagnetic shielding paper according to claim 8, it is characterized in that, described slurry adds cationic polyacrylamide and tributyl phosphate when discongesting, wherein, the addition of cationic polyacrylamide is no more than 5% of stock quality, and the addition of tributyl phosphate is no more than 1% of stock quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713239.8A CN105401484A (en) | 2015-10-28 | 2015-10-28 | Absorptive-type electromagnetic shielding paper and preparation method thereof |
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| CN201510713239.8A CN105401484A (en) | 2015-10-28 | 2015-10-28 | Absorptive-type electromagnetic shielding paper and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813399A (en) * | 2017-10-10 | 2018-03-20 | 中南林业科技大学 | A kind of weather-proof stealthy sheet material of herbaceous plant base and preparation method thereof |
| CN110735362A (en) * | 2018-10-18 | 2020-01-31 | 嘉兴学院 | Preparation method of conductive paper for electromagnetic shielding protection cards |
| CN114214866A (en) * | 2021-11-30 | 2022-03-22 | 航天特种材料及工艺技术研究所 | Magnetic loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN114775330A (en) * | 2022-06-06 | 2022-07-22 | 山东大学 | Carbon fiber electromagnetic shielding paper and preparation method and application thereof |
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| JPS5982497A (en) * | 1982-11-01 | 1984-05-12 | 株式会社 興人 | Conductive paper |
| JPS61160464A (en) * | 1984-12-28 | 1986-07-21 | 旭フアイバ−グラス株式会社 | Conductive sheet |
| JPS61225398A (en) * | 1985-03-28 | 1986-10-07 | 愛媛県 | Sheet like composition containing coudnctive fiber |
| CN1781864A (en) * | 2004-11-30 | 2006-06-07 | 中国科学院理化技术研究所 | Magnetic glass fiber and preparation method thereof |
| CN104404814A (en) * | 2014-09-10 | 2015-03-11 | 华南理工大学 | Wave-absorbing paper and preparation method and application thereof |
| CN104562853A (en) * | 2014-12-17 | 2015-04-29 | 中国建筑材料科学研究总院 | Electromagnetic compatibility wrapping paper and preparation method thereof |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5982497A (en) * | 1982-11-01 | 1984-05-12 | 株式会社 興人 | Conductive paper |
| JPS61160464A (en) * | 1984-12-28 | 1986-07-21 | 旭フアイバ−グラス株式会社 | Conductive sheet |
| JPS61225398A (en) * | 1985-03-28 | 1986-10-07 | 愛媛県 | Sheet like composition containing coudnctive fiber |
| CN1781864A (en) * | 2004-11-30 | 2006-06-07 | 中国科学院理化技术研究所 | Magnetic glass fiber and preparation method thereof |
| CN104404814A (en) * | 2014-09-10 | 2015-03-11 | 华南理工大学 | Wave-absorbing paper and preparation method and application thereof |
| CN104562853A (en) * | 2014-12-17 | 2015-04-29 | 中国建筑材料科学研究总院 | Electromagnetic compatibility wrapping paper and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813399A (en) * | 2017-10-10 | 2018-03-20 | 中南林业科技大学 | A kind of weather-proof stealthy sheet material of herbaceous plant base and preparation method thereof |
| CN107813399B (en) * | 2017-10-10 | 2019-08-06 | 中南林业科技大学 | A kind of weather-proof stealthy plate of herbaceous plant base and preparation method thereof |
| CN110735362A (en) * | 2018-10-18 | 2020-01-31 | 嘉兴学院 | Preparation method of conductive paper for electromagnetic shielding protection cards |
| CN110735362B (en) * | 2018-10-18 | 2022-01-25 | 嘉兴学院 | Preparation method of conductive paper for electromagnetic shielding protection card |
| CN114214866A (en) * | 2021-11-30 | 2022-03-22 | 航天特种材料及工艺技术研究所 | Magnetic loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN114775330A (en) * | 2022-06-06 | 2022-07-22 | 山东大学 | Carbon fiber electromagnetic shielding paper and preparation method and application thereof |
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