WO1997013545A1 - Material with radiation-shielding properties - Google Patents
Material with radiation-shielding properties Download PDFInfo
- Publication number
- WO1997013545A1 WO1997013545A1 PCT/NL1996/000370 NL9600370W WO9713545A1 WO 1997013545 A1 WO1997013545 A1 WO 1997013545A1 NL 9600370 W NL9600370 W NL 9600370W WO 9713545 A1 WO9713545 A1 WO 9713545A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- materials
- combination
- ppm
- electric apparatus
- weight
- Prior art date
Links
Classifications
-
- 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
- H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/16—Screening or neutralising undesirable influences from or using, atmospheric or terrestrial radiation or fields
Definitions
- the invention relates to a combination of materials that can be utilized as an additive in plastic compounds or coatings that are used for total or partly encapsulation of electrical apparatus, wherein high-speed switching elements are being applied, providing that negative effects on the autonomous nervous system of persons that are exposed to the electro-magnetic radiation, originated by these apparatus, are being eliminated.
- Encapsulation of electrical and electronic components or circuitry, in which high-speed switching elements are used, is commonly known and utilized in packaging compounds for transistors and integrated circuits and is described in Japanese patent nr: JP-A-62-105610.
- JP-A-62-105610 An other well-known method of embedding electronic and electrical citcuitry is described in US Patentnr. 4,587,140.
- High-speed switching Electronic Power Supplies e.g. Switched Mode Power Supplies
- This group of products is strongly growing for a number of years. In compact Co puterapplications this type of power supply is already “state of the art” for many years.
- other markets like “Automotive Electronics”, “Entertainment” ( Audio/ Video and Multimedia) , "Domestic Appliancies” and “Lighting Electronics” there is an explosive grow in quantities for Electronic Power Supplies.
- Especially in the area of "Lighting” where in several countries national energy-saving programs have been developed to stimulate the application of electronic power supplies as substitution for classical electromagnetic ballasts.
- a second group of apparatus where high-speed switching elements are being utilized is the group of products wherein digital signal processing is applied.
- the two mentioned groups of products wherein high-speed switching elements are utilized follow a similar technological trend of miniaturization. In a general sense one can conclude that, in order to shrink the physical dimensions of the electrical and electronic components in an electronic circuit, it is necessary to increase the switching frequency , in other words : the number of switching functions (on-off) per second increases. Two major problems are related to this evolution;
- Electromagnetic radiation As a consequence of the increasing switching frequenties of electronic elements, in combination with the modern submicron-technology in integrated circuits, where electrical currents are being
- Electromagnetic radiation in low to very low frequencies is passing a human body unhindered.
- Qualification of the "harmfulness" of 0 these kind of superimposed radiation is extremely complex and strongly dependent on individual and environmental parameters.
- Electrodermal measuring techniques where 5 via selectively placed electrodes on the human body information can be gained related to wanted or unwanted effects on biological functions, caused by all kinds of external influences. As far as these effects show changes of electrical properties of the skin (conductance, potential, 0 impedance) they can be recorded. Examples of such measuring techniques are EEG, ECG, EMG, Brain apping and Decoder- Dermografics.
- EEG, ECG, EMG, Brain apping and Decoder- Dermografics are EEG, ECG, EMG, Brain apping and Decoder- Dermografics.
- the last mentioned method has the advantage that for each person individually can be determined if one (or more) electrical products will have an effect on the ⁇ autonomous nervous system. For this purpose the electrical skin conductance and skin potential are being measured on different locations of the body. Response to a tiny, well defined electric signal is being recorded.
- the invention provides a solution for shielding that part of the electromagnetic radiation spectrum, originated by electric apparatus wherein high-speed switching elements are utilized, that has negative effects on the autonomous nervous systems of persons that are exposed to said radiation.
- 2 ⁇ houses to protect people against harmfull electromagnetic radiation that is coming from outside (f.i. TV- and mobile communication transmitters) .
- a combination of materials, which has shown to be 30 effective in shielding electromagnetic radiation that has a negative effect on the autonomous nervous system of human beings, exposed to the radiation of electrical apparatus wherein high-speed switching elements are being utilized, is socalled ilmenitesand, preferably in dried form.
- the ⁇ > ⁇ > composition of ilminitesand in standard, non-dried form is the following; H20 : 21- 17 %
- the “dry material” has the following composition: Fe20 18 - 23 %
- a combination of materials with this composition can be combined with other filler materials like titaniumdioxide in compounds or coatings.
- the optimal concentration of the invented material has to be determined.
- the basic polymer that is utilized in this practical example is a synthetic thermoplastic resin (Necires LX type 801-100 from Nevcin Polymers BV, Uithoorn, Netherlands) .
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96932856A EP0796125A1 (en) | 1995-10-10 | 1996-09-24 | Material with radiation-shielding properties |
AU71468/96A AU7146896A (en) | 1995-10-10 | 1996-09-24 | Material with radiation-shielding properties |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1001383 | 1995-10-10 | ||
NL1001383 | 1995-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997013545A1 true WO1997013545A1 (en) | 1997-04-17 |
Family
ID=19761685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1996/000370 WO1997013545A1 (en) | 1995-10-10 | 1996-09-24 | Material with radiation-shielding properties |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0796125A1 (en) |
AU (1) | AU7146896A (en) |
WO (1) | WO1997013545A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2115396A (en) * | 1982-02-08 | 1983-09-07 | Potters Industries Inc | Mica conductive flakes |
US4587140A (en) * | 1984-09-27 | 1986-05-06 | Uniroyal Chemical Company, Inc. | Method for embedding electrical and electronic circuitry |
JPS62105610A (en) * | 1985-11-01 | 1987-05-16 | Nippon Zeon Co Ltd | Resin sealing method for electronic and electric parts |
EP0347597A2 (en) * | 1988-06-13 | 1989-12-27 | Ici Composites Inc. | Insulating electromagnetic shielding resin composition |
DE4001994A1 (en) * | 1989-02-02 | 1990-08-09 | Heinz Elter | Automatic EM radiation attenuator - uses crystal in closed glass tube with embedded chrome or iron ions as paramagnetic ions |
-
1996
- 1996-09-24 WO PCT/NL1996/000370 patent/WO1997013545A1/en not_active Application Discontinuation
- 1996-09-24 AU AU71468/96A patent/AU7146896A/en not_active Abandoned
- 1996-09-24 EP EP96932856A patent/EP0796125A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2115396A (en) * | 1982-02-08 | 1983-09-07 | Potters Industries Inc | Mica conductive flakes |
US4587140A (en) * | 1984-09-27 | 1986-05-06 | Uniroyal Chemical Company, Inc. | Method for embedding electrical and electronic circuitry |
JPS62105610A (en) * | 1985-11-01 | 1987-05-16 | Nippon Zeon Co Ltd | Resin sealing method for electronic and electric parts |
EP0347597A2 (en) * | 1988-06-13 | 1989-12-27 | Ici Composites Inc. | Insulating electromagnetic shielding resin composition |
DE4001994A1 (en) * | 1989-02-02 | 1990-08-09 | Heinz Elter | Automatic EM radiation attenuator - uses crystal in closed glass tube with embedded chrome or iron ions as paramagnetic ions |
Non-Patent Citations (2)
Title |
---|
DRS J. L, DE ROOS: "Aardstralenphysica", DE INGENIEUR, vol. 61, no. 16, 22 April 1949 (1949-04-22), UTRECHT, NL, pages 159 - 162, XP002025648 * |
PATENT ABSTRACTS OF JAPAN vol. 11, no. 321 (M - 633) 20 October 1987 (1987-10-20) * |
Also Published As
Publication number | Publication date |
---|---|
EP0796125A1 (en) | 1997-09-24 |
AU7146896A (en) | 1997-04-30 |
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