CN105534529A - Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane - Google Patents
Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane Download PDFInfo
- Publication number
- CN105534529A CN105534529A CN201610100126.5A CN201610100126A CN105534529A CN 105534529 A CN105534529 A CN 105534529A CN 201610100126 A CN201610100126 A CN 201610100126A CN 105534529 A CN105534529 A CN 105534529A
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- electrostatic film
- conductive layer
- footprint
- dust
- dust footprint
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
- A61B5/1174—Identification of persons based on the shapes or appearances of their bodies or parts thereof using footprinting
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- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an electrostatic membrane for extracting dust footprint and a manufacturing method of the static electric membrane. The manufacturing method comprises the following steps: selecting an insulating material, cutting into long strips, and forming an insulating layer; coating the surface on one side of the insulating layer to form a conductive layer, and manufacturing the electrostatic membrane, wherein the width of the conductive layer is smaller than that of the insulating layer, and the left edge and the right edge of the insulating layer respectively exceed corresponding edges of the conductive layer to form a first anti-creeping area; dividing and cutting the electrostatic membrane to form cut edges, and performing insulating treatment on the cut edges to form a second anti-creeping area. As the first anti-creeping area and the second anti-creeping area are formed on the edges of the electrostatic membrane, charges accumulated on the conductive layer cannot flow out from the edges, an electric leakage phenomenon can be avoided, the charge density on the conductive layer is increased to the maximum extent, the property of absorption to dust is improved, and thus a footprint as clear as possible can be acquired.
Description
Technical field
The present invention relates to Well grab field, be specifically related to electrostatic film extracting dust footprint and preparation method thereof.
Background technology
In criminal case investigation, it is the material evidence acquisition mode that utility ratio is very high that dust footprint extracts, and wherein electrostatic film is that dust footprint extracts the most frequently used effective means.
The mode using electrostatic film to carry out the extraction of dust footprint is: first irradiate pickup area to determine the distribution of dust footprint with collimated light beam with glancing incidence angles, then initiating terminal is placed on by being wound into cylindric electrostatic film (insulating barrier outwardly, conductive layer inwardly), again by the minus earth of HV generator, the conductive layer of positive contact electrostatic film, after starting HV generator, cathode charge flows into the earth, and positive charge flows into the conductive layer of electrostatic film.Under the promotion of same sex electric charge mutual expelling force, the electrostatic film Automatic-expanding of winding, covers on dust footprint.Distribution electrostatic charge in the conductive layer produces electric field, and dust below polarizes through insulating barrier by electric field, and by dust adsorption on the insulating barrier of black, is then packed up by electrostatic film.
The electrostatic film of existing extraction dust footprint, the insulating barrier at edge is concordant with conductive layer, following problem is there is: on nonisulated ground during use, when HV generator positive pole charges to electrostatic film, part positive charge can enter the earth (can see that electrostatic film edge has electric arc to flash in operation) from the edge current leakage of electrostatic film conductive layer, thus the charge density reduced in electrostatic film conductive layer, reduce electric field intensity, reduce electrostatic film to the absorption affinity of dust, the definition of footprint is extracted in final impact.
As can be seen here, there is edge current leakage when extracting dust footprint in current electrostatic film, thus the problem of the definition of footprint is extracted in impact.
Summary of the invention
Technical problem to be solved by this invention is that current electrostatic film is used in when nonisulated ground extracting dust footprint and there is edge current leakage, thus the problem of the definition of footprint is extracted in impact.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention there is provided a kind of manufacture method extracting the electrostatic film of dust footprint, comprises the following steps:
Select insulant and cut into strip, forming insulating barrier;
Carry out coating in the side of described insulating barrier on the surface and form conductive layer, make electrostatic film, and the width of described conductive layer is less than the width of described insulating barrier, the respective edges that the left and right edge of described insulating barrier exceeds described conductive layer respectively forms the first anticreep district;
Formed after described electrostatic film step cut and cut edge, edge will be cut and carry out insulation processing and form the second anticreep district.
In the manufacture method of the electrostatic film of said extracted dust footprint, edge will be cut and adopt wrapped with insulation or brushing insulating coating.
In the manufacture method of the electrostatic film of said extracted dust footprint, the conductive layer chemical corrosion method cutting edge is removed.
In the manufacture method of the electrostatic film of said extracted dust footprint, described insulating barrier is plastic foil, and described conductive layer is the coat of metal.
In the manufacture method of the electrostatic film of said extracted dust footprint, the described coat of metal adopts metallic aluminium plating to form.
Present invention also offers a kind of electrostatic film extracting dust footprint, obtained by the manufacture method of the electrostatic film of said extracted dust footprint.
In the electrostatic film of said extracted dust footprint, the width in described first anticreep district or described second anticreep district is 1 ~ 50mm.
In the electrostatic film of said extracted dust footprint, the width in described first anticreep district or described second anticreep district is 10mm.
The present invention, is provided with the first anticreep district and the second anticreep district at the edge of electrostatic film, the positive charge being gathered in conductive layer cannot be flowed out from edge, solve leaky, increase the charge density of conductive layer to greatest extent, improve the absorption affinity to dust, thus obtain footprint clearly of trying one's best.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
The invention provides a kind of electrostatic film extracting dust footprint, solve leaky, increase the charge density of conductive layer to greatest extent, improve the absorption affinity to dust, thus obtain footprint clearly of trying one's best.Below in conjunction with specific embodiment and Figure of description, the present invention is described in detail.
The manufacture method of the electrostatic film of extraction dust footprint provided by the invention, comprises the following steps:
Select insulant and cut into strip, forming insulating barrier, as shown in Figure 1;
Carry out coating in the side of insulating barrier on the surface and form conductive layer 1, make electrostatic film, and the width of conductive layer 1 is less than insulating barrier, the respective edges that the left and right edge of insulating barrier exceeds conductive layer 1 respectively forms the first anticreep district 21;
Formed after electrostatic film step cut and cut edge, edge will be cut and carry out insulation processing and form the second anticreep district 22.In production process, the Primary Speciation of electrostatic film is the web-like form of width 20cm ~ 60cm, length hundreds of meters, electrostatic film is cut into the rectangular of 1m ~ 10m, is wound into tubular, forms utility.The electrostatic film place of cutting can be formed insulating barrier concordant with conductive layer 1 cut edge.
Preferably, edge will be cut and adopt wrapped with insulation, as adopted insulating tape parcel, or brushing insulating coating.
Preferably, the conductive layer 1 cutting edge is removed.The concrete grammar wherein removing conductive layer 1 is: chemical corrosion method.
Preferably, insulating barrier is plastic foil, and conductive layer 1 is the coat of metal.
Preferably, the coat of metal adopts metallic aluminium plating to form, and has both had good electric conductivity, and easy processing with low cost.With HV generator with the use of, make positive charge flow into conductive layer 1, extract dust footprint.
Present invention also offers a kind of electrostatic film extracting dust footprint, obtained by the manufacture method of the electrostatic film of said extracted dust footprint.
The width in the second anticreep district 21 of anticreep district 22 or the first is in 1 ~ 50mm, and the width of the two can be identical, convenient operation.
The width in the first anticreep district 21 is preferably 10mm, and the width in the second anticreep district 22 is preferably 10mm.
The present invention, is provided with the first anticreep district and the second anticreep district at the edge of electrostatic film, the positive charge being gathered in conductive layer cannot be flowed out from edge, solve leaky, increase the charge density of conductive layer to greatest extent, improve the absorption affinity to dust, thus obtain footprint clearly of trying one's best.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structure change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (8)
1. extract the manufacture method of the electrostatic film of dust footprint, it is characterized in that, comprise the following steps:
Select insulant and cut into strip, forming insulating barrier;
Carry out coating in the side of described insulating barrier on the surface and form conductive layer, make electrostatic film, and the width of described conductive layer is less than the width of described insulating barrier, the respective edges that the left and right edge of described insulating barrier exceeds described conductive layer respectively forms the first anticreep district;
Formed after described electrostatic film step cut and cut edge, edge will be cut and carry out insulation processing and form the second anticreep district.
2. the manufacture method extracting the electrostatic film of dust footprint as claimed in claim 1, is characterized in that, will cut edge and adopt wrapped with insulation or brushing insulating coating.
3. the manufacture method extracting the electrostatic film of dust footprint as claimed in claim 1, is characterized in that, removed by the conductive layer chemical corrosion method cutting edge.
4. the manufacture method extracting the electrostatic film of dust footprint as claimed in claim 1, it is characterized in that, described insulating barrier is plastic foil, and described conductive layer is the coat of metal.
5. the manufacture method extracting the electrostatic film of dust footprint as claimed in claim 4, is characterized in that, the described coat of metal adopts metallic aluminium plating to form.
6. extract the electrostatic film of dust footprint, it is characterized in that, obtained by the manufacture method of the electrostatic film of the extraction dust footprint described in any one of Claims 1 to 5.
7. the electrostatic film extracting dust footprint as claimed in claim 6, it is characterized in that, the width in described first anticreep district or described second anticreep district is 1 ~ 50mm.
8. the electrostatic film extracting dust footprint as claimed in claim 7, it is characterized in that, the width in described first anticreep district or described second anticreep district is 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100126.5A CN105534529A (en) | 2016-02-23 | 2016-02-23 | Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100126.5A CN105534529A (en) | 2016-02-23 | 2016-02-23 | Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105534529A true CN105534529A (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610100126.5A Pending CN105534529A (en) | 2016-02-23 | 2016-02-23 | Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane |
Country Status (1)
| Country | Link |
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| CN (1) | CN105534529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238541A (en) * | 2019-05-31 | 2019-09-17 | 苏州五方光电材料有限公司 | A kind of cutting technique of optical mirror slip |
Citations (10)
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|---|---|---|---|---|
| CN2162663Y (en) * | 1993-06-30 | 1994-04-20 | 吴松 | High-voltage electrostatic footprint getting apparatus |
| CN2265761Y (en) * | 1995-12-06 | 1997-10-29 | 公安部第二研究所 | Filmed plastic film for taking dust foot mark |
| CN2274029Y (en) * | 1996-05-24 | 1998-02-11 | 张维占 | Multifunction static pick-up film for flat dust foot printing |
| JP3750109B2 (en) * | 2002-01-30 | 2006-03-01 | 春日電機株式会社 | Portable static eliminator |
| US20080258580A1 (en) * | 2007-04-20 | 2008-10-23 | Schneider John K | Reliability Improvement For Piezoelectric Imaging Array Device |
| CN201959864U (en) * | 2010-12-06 | 2011-09-07 | 陈晋 | Electrostatic dust collection plate |
| US8070060B2 (en) * | 2005-07-19 | 2011-12-06 | Ultra-Scan Corporation | Biometric assurance device and method |
| CN102846322A (en) * | 2012-09-19 | 2013-01-02 | 中国刑事警察学院 | Split type vacuum electrostatic imprint extraction device and application method thereof |
| CN104226483A (en) * | 2014-09-24 | 2014-12-24 | 重庆风小六智能技术有限公司 | Composite material for electrostatic precipitation and particulate trap |
| CN204306829U (en) * | 2014-09-30 | 2015-05-06 | 师维 | The portable one-tenth of Scroll plows footprint Electrostatic Absorption extraction element |
-
2016
- 2016-02-23 CN CN201610100126.5A patent/CN105534529A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2162663Y (en) * | 1993-06-30 | 1994-04-20 | 吴松 | High-voltage electrostatic footprint getting apparatus |
| CN2265761Y (en) * | 1995-12-06 | 1997-10-29 | 公安部第二研究所 | Filmed plastic film for taking dust foot mark |
| CN2274029Y (en) * | 1996-05-24 | 1998-02-11 | 张维占 | Multifunction static pick-up film for flat dust foot printing |
| JP3750109B2 (en) * | 2002-01-30 | 2006-03-01 | 春日電機株式会社 | Portable static eliminator |
| US8070060B2 (en) * | 2005-07-19 | 2011-12-06 | Ultra-Scan Corporation | Biometric assurance device and method |
| US20080258580A1 (en) * | 2007-04-20 | 2008-10-23 | Schneider John K | Reliability Improvement For Piezoelectric Imaging Array Device |
| CN201959864U (en) * | 2010-12-06 | 2011-09-07 | 陈晋 | Electrostatic dust collection plate |
| CN102846322A (en) * | 2012-09-19 | 2013-01-02 | 中国刑事警察学院 | Split type vacuum electrostatic imprint extraction device and application method thereof |
| CN104226483A (en) * | 2014-09-24 | 2014-12-24 | 重庆风小六智能技术有限公司 | Composite material for electrostatic precipitation and particulate trap |
| CN204306829U (en) * | 2014-09-30 | 2015-05-06 | 师维 | The portable one-tenth of Scroll plows footprint Electrostatic Absorption extraction element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238541A (en) * | 2019-05-31 | 2019-09-17 | 苏州五方光电材料有限公司 | A kind of cutting technique of optical mirror slip |
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Application publication date: 20160504 |