CN110494028A - A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone - Google Patents
A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone Download PDFInfo
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- CN110494028A CN110494028A CN201910780901.XA CN201910780901A CN110494028A CN 110494028 A CN110494028 A CN 110494028A CN 201910780901 A CN201910780901 A CN 201910780901A CN 110494028 A CN110494028 A CN 110494028A
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- Prior art keywords
- mobile phone
- touch
- electromagnetic shielding
- human body
- preparation
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Abstract
A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone; it is related to material and engineering science technical field; it is characterized by comprising following steps: ageing-resistant high molecular material bonding agent, the main absorbing material graphite of electromagnetic shielding and metal or metal-oxide powder being stirred, major function raw material is formed；By cold and hot working technique by function Raw material processing flakiness；Thin slice is packaged using insulating materials；Panel interface is installed according to mobile phone model.The present invention is placed in touch-screen mobile phone panel rear as sandwich using electromagnetic shielding material and high molecular material mixed-forming, is exclusively used in direct injury of the electromagnetic radiation excessively high on shielding circuit board of mobile phone to user's brain；Meanwhile the material of selection has microwave absorbing property and nonmetallic reflection characteristic, therefore significantly weakens injury of the electromagnetic radiation to mobile phone user itself, and the electromagnetic radiation of reflection enhancement will not be generated for periphery crowd.
Description
Technical field
The present invention relates to material and engineering science technical field, in particular to a kind of human body electromagnetic screen for touch-screen mobile phone
Cover the preparation method of protection patch.
Background technique
Early in last century the seventies, electromagnetic radiation is classified as international environmental protection weight by United Nations Conference on the Human Environment
One of point project, it is determined as the public hazards that must inhibit.The World Health Organization (WHO, World Health Organization) is electricity
Magnetic radiation is classified as the fourth-largest pollution after water, gas, sound, and lists five greatly influences of the electromagnetic radiation on human body:
(1) electromagnetic radiation is one of cardiovascular disease, diabetes, the main inducing of cancer mutation；
(2) electromagnetic radiation can damage human reproductive system, nervous system, immune system；
(3) electromagnetic radiation is one of risk factors of lesions such as pregnant woman's miscarriage, infertility, monster；
(4) electromagnetic radiation can directly affect the development of children, development of bone marrow, lead to visual impairment, retinal detachment, liver hematopoiesis
Function reduction；
(5) electromagnetic radiation can make female endocrinic disorders, menstrual disorder.
Just there is expert to point out within 1975, urban economy development and population increase so that electronics, communication, automobile, computer etc.
Equipment largely enters family, increases in artificial electromagnetic energy year in city and reaches 7%-14%.According to the rate of increase, 2000 or so cities
Electromagnetic energy density in city's environment 25 times more than 1975, and 2025 or so 700 times i.e. up to 1975, thus
As it can be seen that the electromagnetic environment in city will more complicated and deterioration after 21 century.It is increasingly enhanced for electromagnetic radiation in living environment,
Necessary safeguard procedures are taken to have become a kind of demand that rigidity more increases, ground of the radiation proof material on raw material market
Position also will more protrude.
Only by taking the communications industry as an example.In January, 2008, national mobile phone user's total amount was up to 5.56 hundred million families, compared with 1999
43290000 families, domestic number of mobile phone users increment up to 500,000,000 within 8 years.U.S. authority projecting body Strategy
The data of Analysis show that 2001 end of the year Global Mobile Phone Users reach 900,000,000 people.To Global Mobile Phone Users in 2010
Sum no less than 2,000,000,000.In order to guarantee the coverage rate of communication network, meet requirement of the client to speech quality, a large amount of movement is logical
Letter base station is built up and is operated during this period, and city, suburbs and counties under the jurisdiction of a large city or even remote rural area are covered.The perfect nothing of the construction of these base stations
The covering of line signal provides high-quality and efficient communication service for society, but thus bring electromagnetic radiation is also increasingly
Prominent, people are obtaining except economic benefit and convenience in life, also passively bear the negative effect of technological progress bring
Answer --- electromagnetic pollution.
In terms of pollution source, the electromagnetic radiation of mobile communication base station is primarily threefold, first is that the electromagnetism of transmitter is let out
Dew, second is that the signal radiation of transmitting antenna, third is that high frequency cable and its electromagnetic leakage of joint.In terms of the mode of pollution, electricity
The electromagnetic pollution of news industry is divided into two kinds of situations, and one is mobile communication equipments on closely to personal radiation injury；It is another
Kind is group radiation injury caused by the network that mass communication base station is formed.
It is generally believed that using antenna when mobile phone very close to the head of people, therefore its electromagnetic radiation directly may act on
The head of people.It, can be to nervous system, Hemic and immune system etc. when the microwave signal power of absorption of human body is more than a threshold value
Generate adverse effect.Behaviour winter plum has studied damage of the electromagnetic radiation of cellular phone to small white mouse reproductive function.The result shows that power
The phone radiation that density is 1400 μ W/cm2 can cause the decline of white mouse sperm motility, the reduction of LDH-X activity and sperm tail
The ultrastructural change of mitochondria, thefunction of male reproduction may be influenced by prompting the phone of some strength to radiate, and mechanism may be
Mitochondria is acted on by non-thermal effect, the energetic supersession of androgone is hindered to generate genotoxicity.Han Lei passes through emulation meter
Calculate influence of the electromagnetic radiation for having studied mobile communication base station and mobile phone terminal generation to human body.The result shows that in mobile communication
Base station system, due to its apart from general population farther out, under existing safe and healthy standard, it is believed that the electromagnetism caused by it
Radiation is non-hazardous to most human bodies, but mobile phone is relatively apparent to the radiation effect on head.Referring to general ANSI/
IEEEC95.1-1992 international safety standard, in operating handset frequency 900MHz, peak transmitted power 2W, apart from head 1cm's
Under the conditions of, peak value SAR index in head tissue is there are exceeded, but the average SAR index on entire head not exceeded (is shown in Table 1 institute
Show).
Specific absorption rate SAR (Specific Absorption Rate): the electromagnetic power that unit mass biological tissue absorbs,
The amount is by the universal recognition and acceptance of various countries research worker.1992 safety standard of ANSI/IEEEC95.1-: it is organized with 1 gram
For measurement unit, Human body package radiates the (safety standard under 3KHz to 300GHz) are as follows: " for the photograph under public situation in RF
It penetrates, in arbitrary continuation 30 minutes, the Whole Body SAR that is averaged should be less than 0.08W/Kg, and maximum SAR is answered small in any 1 gram of human body
In 1.6W/Kg."
The electromagnetic radiation of communication base station is current one of research hotspot, and domestic related document is also relatively abundanter.Cai Meiyuan passes through
Actual measurement and simulation study show that the reinforcing bar battle array of building interior is fine to the shield effectiveness of low-frequency range, especially when wavelength is much larger than
When the reinforcing bar battle array period.But with the increase of frequency of electromagnetic radiation, the shield effectiveness of building iron battle array can also be deteriorated, transmitance
Increase, and shielding action can be lost when reinforcing bar direction is orthogonal with incidence wave direction of an electric field.Therefore, the shielding effect of Yao Tigao wall
Fruit must just increase the conductivity of wall.The research of Wang Qiang et al. also indicates that high-power base station is shielded because of high-lager building and trees etc.
The effect of covering, the actual monitoring value of (50 ~ 300 m) radio frequency electromagnetic field is also smaller in its electromagnetic pollution area, and maximum monitor value is
Thus 3.15 μ W/cm2 propose that base station-crowd's safe distance is 30 meters.It is 40 that Shujuan WANG, which passes through the safe distance researched and proposed,
Rice.Jiang Weiguo et al. is to GSM(Global System of Mobile communication) mobile communication base station electromagnetic radiation
Sampling analysis has been done in pollution, the results showed that, most of base stations, which only can reach national electromagnetic radiation environment, influences standard GB8702-
1988 requirement, it is believed that electromagnetic radiation pollution will not be caused to ambient enviroment under equipment normal operation, but GSM is moved
Dynamic communication base station is to the effect on building in 50m still than more significant.
Thus it is not difficult to find out that, there are electromagnetic radiation pollutions generally have been accepted for the communications industry.As people are to communication
The requirement of quality is continuously improved, and radiation intensity caused by communications facility or even terminal is also being gradually increased.Although technological progress can
So that individual equipment radiation intensity is gradually reduced, but increase with the increase of the equipment types with device distribution density, aggrieved
Whether body total radiation dosage, which is desirably gradually reduced, is still unknown.Therefore, it develops electromangnetic spectrum and material solves the person
Injury problem has been common recognition, and consumption demand also increases rapidly.
It is seen in the electromagnetic shielding raw material of registration, main or graphite composite powder at present.Corresponding gold can additionally be matched
Other powders such as category, metal oxide.It is for the binder of forming, then different due to the difference of use condition.When structure is strong
When spending more demanding, resinae high molecular material can be used；When having higher requirements for processability, plastics or rubber can be used
Deng.
In view of this, the present invention provides a kind of preparation method of human body electromagnetic shielding protection patch for touch-screen mobile phone.
Summary of the invention
The preparation method for protecting patch is electromagnetically shielded the object of the present invention is to provide a kind of human body for touch-screen mobile phone,
Using can significantly weaken injury of the electromagnetic radiation to mobile phone user itself, and reflection will not be generated for periphery crowd and increased
Strong electromagnetic radiation.
Used technical solution is the present invention to solve above-mentioned technical problem:
A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone, it is characterised in that: the following steps are included:
(1) ageing-resistant high molecular material bonding agent, the main absorbing material graphite of electromagnetic shielding and metal or metal are aoxidized
Powder is stirred, wherein the ratio of graphite and metal or metal oxide is that 15-30:1 forms mixing；
(2) mixing is processed by function thin slice by cold and hot working technique；
(3) function thin slice is packaged using insulating materials；
(4) panel interface is installed according to mobile phone model.
Preferably, bonding agent is polypropylene or waterglass.
Preferably, polypropylene or waterglass content are the 5-8% of gross mass.
Preferably, metal is iron, nickel, cobalt powder body.
Preferably, metal oxide is ferric oxide powder.
Preferably, function sheet thickness is 0.5-2mm.
Preferably, mixing is processed into the function thin slice of specified specification by injection molding technique.
Preferably, mixing is first processed into flakiness, then thin slice is processed into the function of specified specification by punching process
Thin slice.
Preferably, encapsulation is thermoplastic synthetic resin with insulating materials.
By adopting the above-described technical solution, compared with prior art, the beneficial effects of the present invention are:
It is placed in touch-screen mobile phone panel rear using electromagnetic shielding material and high molecular material mixed-forming, and as sandwich,
It is exclusively used in direct injury of the electromagnetic radiation excessively high on shielding circuit board of mobile phone to user's brain；Meanwhile the material tool of selection
There is microwave absorbing property and nonmetallic reflection characteristic, therefore significantly weakens injury of the electromagnetic radiation to mobile phone user itself, and right
The electromagnetic radiation of reflection enhancement will not be generated in periphery crowd.Summarize the above technical characteristic it is seen that this project innovation it
Place:
(1) common Low-cost electric magnetic shielding material graphite composite powder etc. is developed new electromagnetic shielding in conjunction with high molecular material
Functional material；
(2) low cost of material, high processing efficiency, processability are good, and These characteristics are also that this technology creates applications well prospect；
(3) industrialization used processes raw material with environmentally protective characteristic；
(4) touch-screen mobile phone is applied to by production patch, electromagnetic radiation can be substantially reduced in mobile phone use to the wound of human brain
Evil.
Specific embodiment
In conjunction with the preferred embodiment, to a kind of human body electromagnetic shielding guarantor for touch-screen mobile phone proposed according to the present invention
The specific embodiment and its effect of the preparation method of patch are protected, detailed description is as follows.
Embodiment 1
A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone, it is characterised in that: the following steps are included:
(1) ageing-resistant high molecular material bonding agent polypropylene, the main absorbing material graphite of electromagnetic shielding and iron powder body are stirred
Mixing；Wherein, the ratio of graphite and iron powder is 20:1；Polypropylene content is the 8% of gross mass, and is sufficiently mixed, and mixing is formed；
(2) the function thin slice of 1mm thickness is directly processed by injection molding technique；
(3) function thin slice is packaged using thermoplastic synthetic resin polyvinyl chloride；
(4) panel interface is installed according to mobile phone model.
Iron powder has conductive characteristic and processing performance is preferable, can be used for being electromagnetically shielded.
Embodiment 2
Mixing is first processed into the thin slice of 1mm thickness by the technique of machining function thin slice unlike the first embodiment, the present embodiment, so
Thin slice is processed by punching process the function thin slice of specified specification afterwards.
Embodiment 3
Unlike the first embodiment, iron powder is replaced with into ferric oxide powder.
Embodiment 4
Unlike the first embodiment, polypropylene is replaced with into waterglass.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form, appoint
What is to the above embodiments according to the technical essence of the invention any simply to repair without departing from technical solution of the present invention content
Change, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone, it is characterised in that: including following step
It is rapid:
By ageing-resistant high molecular material bonding agent, the main absorbing material graphite of electromagnetic shielding and metal or metal oxide powder
Body is stirred, wherein the ratio of graphite and metal or metal oxide is that 15-30:1 forms mixing；
By cold and hot working technique by function Raw material processing at function thin slice；
Function thin slice is packaged using insulating materials；
Panel interface is installed according to mobile phone model.
2. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: bonding agent is polypropylene or waterglass.
3. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as claimed in claim 2
In the 5-8% that: polypropylene or waterglass content are gross mass.
4. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: metal is iron, nickel, cobalt powder body.
5. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: metal oxide is ferric oxide powder.
6. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: function sheet thickness is 0.5-2mm.
7. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: the function thin slice of specified specification is directly processed by being injection moulded.
8. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: mixing is first processed into flakiness, then thin slice is processed into the function thin slice of specified specification by punching process.
9. the preparation method for the human body electromagnetic shielding protection patch of touch-screen mobile phone, feature exist as described in claim 1
In: encapsulation is thermoplastic synthetic resin with insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910780901.XA CN110494028A (en) | 2019-08-22 | 2019-08-22 | A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone |
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| CN201910780901.XA CN110494028A (en) | 2019-08-22 | 2019-08-22 | A kind of preparation method of the human body electromagnetic shielding protection patch for touch-screen mobile phone |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004059832A (en) * | 2002-07-31 | 2004-02-26 | Hitachi Cable Ltd | Electromagnetic wave absorbing material composition and electromagnetic wave absorber |
| US20040172502A1 (en) * | 2003-02-13 | 2004-09-02 | Lionetta William G. | Composite EMI shield |
| US20070199738A1 (en) * | 1994-06-06 | 2007-08-30 | Wavezero, Inc. | Electromagnetic Interference Shields for Electronic Devices |
| CN102555314A (en) * | 2011-12-30 | 2012-07-11 | 深圳市爱诺菲科技有限公司 | SMD (surface mounted device) with cooling and electromagnetic wave absorption functions and preparation method and application thereof |
| CN103666306A (en) * | 2012-09-13 | 2014-03-26 | Dic株式会社 | Bonding sheet, electromagnetic wave shielding sheet and electronic equipment |
| CN203872219U (en) * | 2014-04-30 | 2014-10-08 | 路东琪 | Mobile phone electromagnetic radiation resisting device |
| CN104893605A (en) * | 2015-05-21 | 2015-09-09 | 苏州斯迪克新材料科技股份有限公司 | Wave-absorbing plate for electromagnetic shielding |
| CN104972710A (en) * | 2014-04-10 | 2015-10-14 | 苏州驭奇材料科技有限公司 | Electromagnetic wave absorption apparatus and preparation method thereof |
| CN107135637A (en) * | 2017-05-27 | 2017-09-05 | 东北大学 | A kind of wave absorbing patch based on cladded type composite and preparation method thereof |
| CN207011209U (en) * | 2017-06-26 | 2018-02-13 | 安徽宇航派蒙防辐射科技股份有限公司 | A kind of Antiradiation mobile phone patch |
| CN107912012A (en) * | 2017-11-29 | 2018-04-13 | 横店集团东磁股份有限公司 | A kind of electromagnetic wave shielding/absorption composite paster and preparation method thereof |
| CN108586783A (en) * | 2018-01-31 | 2018-09-28 | 大连东信微波技术有限公司 | The thin slice and preparation method thereof of energy electromagnetic wave absorption |
| CN208462292U (en) * | 2018-08-13 | 2019-02-01 | 北京梦之墨科技有限公司 | A kind of electromagnetic armouring structure |
| CN208675323U (en) * | 2018-10-18 | 2019-03-29 | 广东精力通电子科技有限公司 | A kind of anti-mobile phone radiation shielding case |
| CN109664567A (en) * | 2018-12-12 | 2019-04-23 | 横店集团东磁股份有限公司 | A kind of thermally conductive Wave suction composite material of sheet type and preparation method thereof |
| CN109664565A (en) * | 2017-10-17 | 2019-04-23 | 北京大学深圳研究生院 | A kind of electromagnetic shielding film and preparation method thereof |
-
2019
- 2019-08-22 CN CN201910780901.XA patent/CN110494028A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070199738A1 (en) * | 1994-06-06 | 2007-08-30 | Wavezero, Inc. | Electromagnetic Interference Shields for Electronic Devices |
| JP2004059832A (en) * | 2002-07-31 | 2004-02-26 | Hitachi Cable Ltd | Electromagnetic wave absorbing material composition and electromagnetic wave absorber |
| US20040172502A1 (en) * | 2003-02-13 | 2004-09-02 | Lionetta William G. | Composite EMI shield |
| CN102555314A (en) * | 2011-12-30 | 2012-07-11 | 深圳市爱诺菲科技有限公司 | SMD (surface mounted device) with cooling and electromagnetic wave absorption functions and preparation method and application thereof |
| CN103666306A (en) * | 2012-09-13 | 2014-03-26 | Dic株式会社 | Bonding sheet, electromagnetic wave shielding sheet and electronic equipment |
| CN104972710A (en) * | 2014-04-10 | 2015-10-14 | 苏州驭奇材料科技有限公司 | Electromagnetic wave absorption apparatus and preparation method thereof |
| CN203872219U (en) * | 2014-04-30 | 2014-10-08 | 路东琪 | Mobile phone electromagnetic radiation resisting device |
| CN108617153A (en) * | 2015-05-21 | 2018-10-02 | 太仓斯迪克新材料科技有限公司 | Wave absorbing patch for weakening electromagnetic radiation |
| CN104893605A (en) * | 2015-05-21 | 2015-09-09 | 苏州斯迪克新材料科技股份有限公司 | Wave-absorbing plate for electromagnetic shielding |
| CN107135637A (en) * | 2017-05-27 | 2017-09-05 | 东北大学 | A kind of wave absorbing patch based on cladded type composite and preparation method thereof |
| CN207011209U (en) * | 2017-06-26 | 2018-02-13 | 安徽宇航派蒙防辐射科技股份有限公司 | A kind of Antiradiation mobile phone patch |
| CN109664565A (en) * | 2017-10-17 | 2019-04-23 | 北京大学深圳研究生院 | A kind of electromagnetic shielding film and preparation method thereof |
| CN107912012A (en) * | 2017-11-29 | 2018-04-13 | 横店集团东磁股份有限公司 | A kind of electromagnetic wave shielding/absorption composite paster and preparation method thereof |
| CN108586783A (en) * | 2018-01-31 | 2018-09-28 | 大连东信微波技术有限公司 | The thin slice and preparation method thereof of energy electromagnetic wave absorption |
| CN208462292U (en) * | 2018-08-13 | 2019-02-01 | 北京梦之墨科技有限公司 | A kind of electromagnetic armouring structure |
| CN208675323U (en) * | 2018-10-18 | 2019-03-29 | 广东精力通电子科技有限公司 | A kind of anti-mobile phone radiation shielding case |
| CN109664567A (en) * | 2018-12-12 | 2019-04-23 | 横店集团东磁股份有限公司 | A kind of thermally conductive Wave suction composite material of sheet type and preparation method thereof |
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Application publication date: 20191122 |