CN201464665U - Large size microprism type reflection material mould - Google Patents
Large size microprism type reflection material mould Download PDFInfo
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- CN201464665U CN201464665U CN2009201207579U CN200920120757U CN201464665U CN 201464665 U CN201464665 U CN 201464665U CN 2009201207579 U CN2009201207579 U CN 2009201207579U CN 200920120757 U CN200920120757 U CN 200920120757U CN 201464665 U CN201464665 U CN 201464665U
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Abstract
A large size microprism type reflection material mould comprises a mould baseplate and a metal film plated and covered on the mould baseplate, wherein a sunk prism array structure which is distributed tightly and evenly is pressed on the front of the mould baseplate, the metal film contains a copper metal film and a nickel metal film in turn, and the mould baseplate material is polycarbonate, polymethylacrylic acid or polyimide. By using the large size microprism type reflection material mould provided by the utility model, cheap and universal PVC material can be used for one-time machining and shaping of the large size microprism type reflection material and product, thus reducing the production process complexity and production cost of the reflection material and product.
Description
(1) technical field
The utility model relates to a kind of large-size micro-prism type reflecting material die, is applicable to make individual and traffic safety reflectorized material and goods.
(2) background technology
In recent years, owing to the develop rapidly of society, automobile more and more becomes the indispensable vehicles of people on the one hand, and along with the increase of motor vehicles, traffic hazard is also risen significantly on the other hand.Have statistical figure to show, the dependent probability of pedestrian's dressing and road markings and accident is 70%, and distinct pedestrian's dressing and road markings can be given the good conditioned reflex of driver.The pedestrian dresses and decorates the clothes that reflectorized material is arranged, and uses reflectorized material that eye-catching traffic mark, vehicle license are set, and can make road accident rate descend 30%～40%.At present, reflectorized material has been widely used in individual traffic safety product and the traffic safety product.In fact, along with government to the increasing of trouble free service dynamics and the raising of people's awareness of safety, the application of reflectorized material no longer only is confined in the traffic safety, in the mine, fire-fighting, speedily carry out rescue work, other industry such as building also begun to be extensive use of.
The reflectorized material (as reflective tape, reflective cloth and reflective membrane) that is used for individual traffic safety is mainly used to make reflective clothing, as the reflecting clothes of the traffic police and the workman's dress of keeping a public place clean.Reflectorized material has utilized the reflex reflection principle of optics, and its reflecting unit can be divided into two types of glass microballoon and microprisms, as the reflective cloth (film) of micro-prism type reflective tape (film) and glass microballoon type.From the angle of geometrical optics, the limit reflectivity of microprism array can reach 66%, and micropearl array only is 50%.The height of the reflex reflection efficient of micro-prism type reflecting material and goods, mainly by the microprism mold decision of making reflectorized material and goods, and large-size micro-prism type reflecting material die is a key of producing the high-quality reflectorized material in batches, therefore research and develop large-size micro-prism type reflecting material die functional, with low cost and manufacture craft thereof, become present traffic safety with the focus of paying close attention in reflectorized material technology and the production field.
With the immediate prior art of the utility model be a kind of a kind of micro-prism type reflecting material (Chinese patent CN 1271102A, 2000) that constitutes of being close to by directional reflective layer, little air chamber layer, adhesion layer, adhesive-layer and protective seam.Wherein the directional reflective layer is a polycarbonate film, and its surface is a micron order regular pyramid prism array, and little air chamber layer and adhesion layer are the PVC material, and adhesive-layer adopts impression glue, and protective seam is paper material, need takes off when using.Its manufacture craft adopts photoetching technique and dry etching technology, therefore can not make the large scale mould.There is following shortcoming in this technology: 1, complex structure, constitute by multilayer material, so the production procedure complexity; 2, adopt Micrometer-Nanometer Processing Technology to make, one-time formed reflectorized material and goods small-sized is unfavorable for industrialization; 3, adopting photoetching and dry etching is the manufacturing technology of main body, causes the production cost height.
(3) utility model content
Shortcomings such as, production cost height little for the size that overcomes prior art complex structure, production procedure complexity, one-time formed reflectorized material and goods, the utility model proposes a kind of general cheap PVC material of using, the large-size micro-prism type reflecting material die of time processing moulding reaches the size that increases considerably one-time formed reflectorized material and goods, the purpose that reduces production costs, reduces the production procedure complexity.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of large-size micro-prism type reflecting material die, the metallic film that comprises die substrate and die substrate plating, described die substrate front is suppressed with the prism array structure of the depression of closely evenly arranging, the metallic film of described die substrate plating is followed successively by copper metal film, thin nickel metal film, and described die substrate material is polycarbonate, polymethylmethacrylate or polyimide.
Described prism array structure be well known to those skilled in the art can, various ways can be arranged; The separate unit of described prism array structure is positive triangular pyramid body structure.The height of positive triangular pyramid body structure, be the vertical height of positive triangular pyramid summit to the bottom surface, the degree of depth that is the depression minimum point of prism array structure realizes by the angle of controlling positive triangular facies basialis pyramidis and side usually, the angle of positive triangular pyramid body side surface and bottom surface is 17.47 degree～21.47 degree, positive in theory triangular pyramid body side surface becomes 19.47 degree best with the angle of bottom surface, in order to ensure the reflecting effect of the best, the utility model embodiment all adopts this angle.The bottom surface length of side in the positive triangular pyramid body structure is 90～350 microns, as shown in Figure 1, the bottom surface of the positive triangular pyramid body structure of separate unit described in the utility model is an equilateral triangle, the projection of summit in the bottom surface is leg-of-mutton center, bottom surface, promptly except that the bottom surface, three triangles are identical isosceles triangles in addition.
The bottom surface length of side in the described positive triangular pyramid body structure is preferably 100～200 microns.
Preparation method of the present utility model can carry out as follows:
(A) getting aluminium alloy is small sized metallic template base material, on small sized metallic template base material, scribe the prism array structure of projection, form the microprism array structure that several separate units are formed, make the small sized metallic force plate, the continuous layout of described small sized metallic force plate can connect into the prism array structure of closely arranging; Here the small sized metallic force plate of indication is meant the template of rag indent, and the small sized metallic force plate will use as turning over the system large form in following step;
(B) the small sized metallic force plate that step (A) is made cleans; Usually cleaning fluid is that ethanol and acetone are 1: 1 formulated solution by volume;
(C) plating one layer thickness is the copper metal film of 100-250 nanometer on the small sized metallic force plate after handling through step (B); The method that adopts is electron beam evaporation, ion beam sputtering or magnetron sputtering, and wherein the most frequently used is electron beam evaporation; The control of coating film thickness can be adopted quartz crystal oscillator method well-known to those skilled in the art or time control act, adopts time control act usually;
(D) with small sized metallic force plate after step (C) is handled as the electroforming cathode material, growing thickness with the method for electroforming is 4～5 millimeters thin nickel metal film, makes small size nickel metal positive plate.
(E) the small size nickel metal positive plate that utilizes step (D) to make, select the large scale die substrate, on the die substrate front, suppress small size nickel metal positive plate successively, and it is closely arranged continuously, form the large scale template, described die substrate material is polycarbonate, polymethylmethacrylate or polyimide; The described arrangement continuously closely is meant that small size nickel metal positive plate at large scale die substrate pressing mold successively continuously, forms continuous microprism array structure former at the large scale die substrate;
(F) plating one layer thickness is the copper metal film of 100～250 nanometers on the large scale template of making through step (E), as the electroforming cathode material; The method that adopts is electron beam evaporation or ion beam sputtering or magnetron sputtering, and wherein the most frequently used is electron beam evaporation; The control of coating film thickness can be adopted quartz crystal oscillator method well-known to those skilled in the art or time control act, adopts time control act usually;
(G) with large scale template after step (F) is handled as the electroforming cathode material, growing thickness with the method for electroforming is 2～3 millimeters thin nickel metal film, makes large scale nickel metal form, finishes the making of described large-size micro-prism type reflecting material die.
Clean in the described step (B) and be meant with cleaning fluid to be that ethanol and acetone are the solution cleaning of preparation in 1: 1 by volume.
Described die substrate material is preferably polycarbonate.
Described step (A) is scribed used instrument on small sized metallic template base material be diamond cutter, and described diamond cutter is that the separate unit structure according to described prism array structure is made through the diamond cutter grinding machine.The number of separate unit is The more the better in theory, be subjected to machine conditions limit described small sized metallic force plate by 120000～1500000 arranged side by side and separate unit that line up plurality of rows form.
The separate unit of described step (A) prism array structure is positive triangular pyramid body structure, scribe on aluminium alloy template base material with the diamond cutter that the diamond cutter grinding machine is made according to described positive triangular pyramid body structure, each graduating with cutter degree of depth is 0.8～1.2 micron, propelling stroke finishes rear blade and lifts, get back to reference position, and then repeat this operation, article one, after the cutting planing is finished, worktable is along the direction translation perpendicular to the planing route, the second cutting that diamond cutter is planed parallel with last cutting again; When this side up after all cuttings plane, 120 ° of worktable rotations, the parallel cutting of another group of planing out successively again; Rotate 120 ° at last again, the 3rd group of parallel cutting of planing out successively, each is organized between the parallel cutting at a distance of 78 microns to 303 microns, forms described prism array structure.
As the electroforming cathode material, grow thickness with the method for electroforming is 4-5 millimeter thin nickel metal film to described step (D), makes small size nickel metal positive plate with small sized metallic force plate after step (C) is handled.Described electrocasting method is well-known to those skilled in the art, and the electroforming solution type of electroformed nickel is mainly sulfate electroforming solution or sulfamate electroforming solution or sulfate/chloride electroforming solution, and wherein the most frequently used is the sulfate electroforming solution.The quality proportioning of sulfate electroforming solution is that every liter of electroplate liquid sulfur acid nickel 240～280 grams, nickel chloride 38～45 grams and boric acid 36～42 gram proportionings form, and described step (G) also adopts said method to carry out electroforming.
The large scale die substrate of described step (E) is according to the needed size decision of article of manufacture, and described large scale die substrate material is preferably polycarbonate.
The beneficial effects of the utility model mainly show: the large-size micro-prism type reflecting material die that 1, utilizes the utility model to provide, can use general cheap PVC material, time processing moulding large-size micro-prism type reflecting material and goods; 2, reduce the production procedure complexity of reflectorized material and goods, reduced the production cost of reflectorized material and goods.
(4) description of drawings
Fig. 1 is a prism array structural representation in the utility model large-size micro-prism type reflecting material die
Fig. 2 is the separate unit synoptic diagram of prism array structure in the utility model large-size micro-prism type reflecting material die
Fig. 3 is the retro-reflecting coefficient measurement result figure that adopts the reflectorized material of the utility model large-size micro-prism type reflecting material die manufacturing
(5) embodiment
With specific embodiment the technical solution of the utility model is further described below, but protection domain of the present utility model is not limited thereto:
Embodiment 1:
A kind of large-size micro-prism type reflecting material die, the metallic film that comprises die substrate and die substrate plating, described die substrate front is suppressed with the prism array structure of the depression of closely evenly arranging, the metallic film of described die substrate plating is followed successively by copper metal film, thin nickel metal film, and described die substrate material is a polycarbonate.The separate unit of described prism array structure is positive triangular pyramid body structure, and the angle of positive triangular pyramid body side surface and bottom surface is 19.47 degree, and the bottom surface length of side in the positive triangular pyramid body structure is 120 microns.
A kind of manufacturing process steps of large-size micro-prism type reflecting material die is as follows:
(A) the separate unit bottom surface equilateral triangle length of side of prism array structure is set at 120 microns, according to well known to a person skilled in the art technical method, utilize the diamond cutter grinding machine to make the accurate diamond cutter that is used to process the small sized metallic masterplate, the angle initialization on diamond cutter inclined-plane is 70.53 degree, it is enough dark that the bevel depth that is used to cut of diamond cutter is wanted, this degree of depth will be above the distance of the summit in the positive triangle cone of prism array structure separate unit to the base, bottom surface, tool dimension is by the size decision of separate unit in the prism array structure, this size that is not technical essential of the present utility model and those of ordinary skills set according to separate unit in the prism array structure can both be prepared the diamond cutter that matches, so the preparation process of diamond cutter is not in this description.
(B) diamond cutter that utilizes step (A) to make is made small sized metallic formpiston version, material is the less aluminium alloy of hardness, 1 micron of each graduating with cutter degree of depth, propelling stroke finishes rear blade and lifts, and gets back to reference position, and then repeats this operation, be that each cutting all needs repeatedly planing to form, article one, after the cutting planing was finished, worktable was along the direction translation perpendicular to the planing route, the second cutting that diamond cutter is planed parallel with last cutting again; When this side up after all cuttings plane, 120 ° of worktable rotations, the parallel cutting of another group of planing out successively again; Rotate 120 ° at last again, the 3rd group of parallel cutting of planing out successively, each is organized between the parallel cutting at a distance of 104 microns, forms microprism array as shown in Figure 1, comprises about 900000 separate units altogether, and the separate unit bottom surface equilateral triangle length of side is 120 microns.Here be noted that between the parallel cutting at a distance of being the height of bottom surface equilateral triangle in theory, be 0.866 times of the equilateral triangle length of side but actual super as the time allow some those skilled in the art can connect the error of awarding.
(C) the small sized metallic formpiston version that step (B) is made is carried out the conventional chemical cleaning, and cleaning fluid is that ethanol and acetone are 1: 1 formulated solution by volume.
(D) plating one layer thickness is the copper metal film of 150 nanometers on the small sized metallic formpiston version after handling through step (C), as the electroforming cathode material.Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 150 seconds, obtains the copper metal film of 150 nanometers.
(E) on the small sized metallic formpiston version after step (D) is handled, utilizing the method for electroforming to grow thickness is 4 millimeters thin nickel metal film, makes the small size nickel metal positive version that microstructure and small sized metallic formpiston version are complementary.Described electrocasting method is well-known to those skilled in the art, at first will immerse and fill in the electrolytic tank of electroforming solution through the small sized metallic formpiston version after step (D) is handled, the electroforming solution of electroformed nickel consists of sulfate, form according to every liter of sulfur acid nickel 250 grams, nickel chloride 40 grams and boric acid 40 gram proportionings, electroforming temperature 55 degree, 30 hours electroforming time.
(F) its tight arrangement is suppressed and made to the small size nickel metal positive version of utilizing step (E) to make being of a size of long 500 millimeters, successively on the wide 100 millimeters polycarbonate substrate, form the large scale masterplate of makrolon material.
(G) plating one layer thickness is the copper metal film of 150 nanometers on the large scale masterplate of the makrolon material of making through step (F), as the electroforming cathode material.Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 150 seconds, obtains the copper metal film of 150 nanometers.
(H) on the large scale polycarbonate-base bottom material masterplate after step (G) is handled, utilizing the method for electroforming to grow thickness is 2 millimeters thin nickel metal film, makes large scale nickel metal matrix, finishes a kind of making of large-size micro-prism type reflecting material die.Described electrocasting method is well-known to those skilled in the art, at first will immerse and fill in the electrolytic tank of electroforming solution at the small sized metallic masterplate after step (G) is handled, the electroforming solution of electroformed nickel consists of the sulfate electroforming solution, form according to every liter of sulfur acid nickel 250 grams, nickel chloride 40 grams and boric acid 40 gram proportionings, electroforming temperature 55 degree, 16 hours electroforming time.
Embodiment 2:
Large-size micro-prism type reflecting material die is operated with embodiment 1 with making, and different is:
Plating one layer thickness is the copper metal film of 250 nanometers on the small sized metallic masterplate in the step (D) after handling through step (C).Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 250 seconds, obtains the copper metal film of 250 nanometers.
Plating a layer thickness in the step (G) on the large scale masterplate of the makrolon material of making through step (F) is the copper metal film of 250 nanometers, and film plating process is identical with step (D).
All the other steps are identical with embodiment 1.
Embodiment 3:
Large-size micro-prism type reflecting material die is operated with embodiment 1 with making, and different is:
Plating one layer thickness is the copper metal film of 100 nanometers on the small sized metallic masterplate in the step (D) after handling through step (C).Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 100 seconds, obtains the copper metal film of 100 nanometers.
Plating a layer thickness in the step (G) on the large scale masterplate of the makrolon material of making through step (F) is the copper metal film of 100 nanometers, and film plating process is identical with step (D).
All the other steps are identical with embodiment 1.
Embodiment 4:
Large-size micro-prism type reflecting material die is operated with embodiment 1 with making, and different is:
On the small sized metallic formpiston version after step (D) is handled, utilizing the method for electroforming to grow thickness is 5 millimeters thin nickel metal film in the step (E).Described electrocasting method is identical with embodiment 1, and the electroforming parameter is: electroforming solution consists of the sulfate electroforming solution, forms electroforming temperature 55 degree, 38 hours electroforming time according to every liter of sulfur acid nickel 250 grams, nickel chloride 40 grams and boric acid 40 gram proportionings.
All the other steps are identical with embodiment 1.
Embodiment 5:
Large-size micro-prism type reflecting material die is operated with embodiment 1 with making, and different is:
On the large scale polycarbonate-base bottom material masterplate after step (G) is handled, utilizing the method for electroforming to grow thickness is 3 millimeters thin nickel metal film in the step (H).Described electrocasting method is identical with embodiment 1, and the electroforming parameter is: electroforming solution consists of sulfate, forms electroforming temperature 55 degree, 23 hours electroforming time according to every liter of sulfur acid nickel 250 grams, nickel chloride 40 grams and boric acid 40 gram proportionings.
All the other steps are identical with embodiment 1.
Embodiment 6:
Large-size micro-prism type reflecting material die other with embodiment 1, different is that the die substrate material is a polymethylmethacrylate, makes operation with embodiment 1, different is:
The die substrate material that adopts in the step (F) is a polymethylmethacrylate.
All the other steps are identical with embodiment 1.
Embodiment 7:
Large-size micro-prism type reflecting material die other with embodiment 1, different is that the die substrate material is a polyimide, make other the operation with embodiment 1, different is:
The die substrate material that adopts in the step (F) is a polyimide.
All the other steps are identical with embodiment 1.
Embodiment 8:
Large-size micro-prism type reflecting material die other with embodiment 1, the bottom surface equilateral triangle length of side that different is in the positive triangular pyramid body structure of separate unit is 90 microns, makes operation with embodiment 1, different is:
Utilize the diamond cutter grinding machine to make to be used for the accurate diamond cutter of the required small sized metallic masterplate of processing and implementation example 8 in the step (A).
The small sized metallic formpiston version of in step (B), making, each is organized between the parallel cutting at a distance of 78 microns, and the microprism array of formation comprises about 1500000 separate units altogether, and the separate unit bottom surface equilateral triangle length of side is 90 microns.
Plating one layer thickness is the copper metal film of 200 nanometers on the small sized metallic masterplate in the step (D) after handling through step (C).Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 200 seconds, obtains the copper metal film of 200 nanometers.
The electroforming solution of electroformed nickel consists of sulfate in the step (E), forms electroforming temperature 55 degree, 30 hours electroforming time according to every liter of sulfur acid nickel 280 grams, nickel chloride 45 grams and boric acid 42 gram proportionings.
The electroforming solution of electroformed nickel consists of sulfate in the step (H), forms electroforming temperature 55 degree, 16 hours electroforming time according to every liter of sulfur acid nickel 280 grams, nickel chloride 45 grams and boric acid 42 gram proportionings.
All the other steps are identical with embodiment 1.
Embodiment 9:
Large-size micro-prism type reflecting material die other with embodiment 1, the bottom surface equilateral triangle length of side that different is in the positive triangular pyramid body structure of separate unit is 200 microns, makes operation with embodiment 1, different is:
Utilize the diamond cutter grinding machine to make to be used for the accurate diamond cutter of the required small sized metallic masterplate of processing and implementation example 9 in the step (A).
The small sized metallic formpiston version of in step (B), making, each is organized between the parallel cutting at a distance of 173 microns, and the microprism array of formation comprises about 330000 separate units altogether, and the separate unit bottom surface equilateral triangle length of side is 200 microns.
Plating one layer thickness is the copper metal film of 120 nanometers on the small sized metallic masterplate in the step (D) after handling through step (C).Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 120 seconds, obtains the copper metal film of 120 nanometers.
The electroforming solution of electroformed nickel consists of sulfate in the step (E), forms electroforming temperature 55 degree, 30 hours electroforming time according to every liter of sulfur acid nickel 240 grams, nickel chloride 38 grams and boric acid 36 gram proportionings.
Step (G) is plated a layer thickness on the large scale masterplate of the makrolon material of making through step (F) be the copper metal film of 120 nanometers, as the electroforming cathode material.Film plating process adopts electron beam evaporation, vacuum tightness 1 * 10
-3Pa, obtaining plated film speed through calibration experiment is per second 1 nanometer, finishes plated film after 120 seconds, obtains the copper metal film of 120 nanometers.
On the large scale polycarbonate-base bottom material masterplate of step (H) after handling through step (G), utilizing the method for electroforming to grow thickness is 3 millimeters thin nickel metal film, make large scale nickel metal matrix, the electroforming solution of electroformed nickel consists of sulfate, form according to every liter of sulfur acid nickel 240 grams, nickel chloride 38 grams and boric acid 36 gram proportionings, electroforming temperature 55 degree, 24 hours electroforming time.
All the other steps are identical with embodiment 1.
Embodiment 10:
Large-size micro-prism type reflecting material die other with embodiment 1, the bottom surface equilateral triangle length of side that different is in the positive triangular pyramid body structure of separate unit is 350 microns, makes operation with embodiment 1, different is:
Utilize the diamond cutter grinding machine to make to be used for the accurate diamond cutter of the required small sized metallic masterplate of processing and implementation example 10 in the step (A).
The small sized metallic formpiston version of in step (B), making, each is organized between the parallel cutting at a distance of 303 microns, and the microprism array of formation comprises about 120000 separate units altogether, and the separate unit bottom surface equilateral triangle length of side is 350 microns.
All the other steps are identical with embodiment 1.
Utilize above-mentioned 10 large-size micro-prism type reflecting material dies that embodiment makes, manufactured experimently the micro-prism type reflecting material of general PVC material, its retro-reflecting coefficient is tested.The reflex reflection rate by formula R (y, z)=R
1(y, z)+R
2(y z) tries to achieve, wherein
D in the formula
y, d
zBe respectively the cycle of array on Y, Z-direction, m, n are the direction cosine of incident ray, and M, N correspond respectively to the unit number on Y, the Z direction, r (y, z) expression unit reflectivity function.
Wherein embodiment 1 test result is best, and as shown in Figure 3, retro-reflecting coefficient is near 800cd/lux/m2, near the like product highest level in the world.
Claims (5)
1. large-size micro-prism type reflecting material die, the metallic film that comprises die substrate and die substrate plating, described die substrate front is suppressed with the prism array structure of the depression of closely evenly arranging, the metallic film that it is characterized in that described die substrate plating is followed successively by copper metal film, thin nickel metal film, and described die substrate material is polycarbonate, polymethylmethacrylate or polyimide.
2. large-size micro-prism type reflecting material die as claimed in claim 1, the separate unit that it is characterized in that described prism array structure are positive triangular pyramid body structure.
3. large-size micro-prism type reflecting material die as claimed in claim 1 or 2, it is characterized in that the positive triangular pyramid body side surface of described prism array structure and the angle of bottom surface are 17.47 degree～21.47 degree, the bottom surface length of side in the positive triangular pyramid body structure is 90～350 microns.
4. large-size micro-prism type reflecting material die as claimed in claim 3 is characterized in that the bottom surface length of side in the described positive triangular pyramid body structure is 100～200 microns.
5. large-size micro-prism type reflecting material die as claimed in claim 1 or 2 is characterized in that the positive triangular pyramid body side surface of described prism array structure and the angle of bottom surface are 19.47 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201207579U CN201464665U (en) | 2009-06-01 | 2009-06-01 | Large size microprism type reflection material mould |
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| CN2009201207579U CN201464665U (en) | 2009-06-01 | 2009-06-01 | Large size microprism type reflection material mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443631A (en) * | 2017-08-14 | 2017-12-08 | 浙江道明光电科技有限公司 | A kind of preparation method of microprismatic retroreflective material molds |
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443631A (en) * | 2017-08-14 | 2017-12-08 | 浙江道明光电科技有限公司 | A kind of preparation method of microprismatic retroreflective material molds |
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| C17 | Cessation of patent right | ||
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Granted publication date: 20100512 Termination date: 20120601 |