CN102091686B - Spraying method - Google Patents
Spraying method Download PDFInfo
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- CN102091686B CN102091686B CN 200910311447 CN200910311447A CN102091686B CN 102091686 B CN102091686 B CN 102091686B CN 200910311447 CN200910311447 CN 200910311447 CN 200910311447 A CN200910311447 A CN 200910311447A CN 102091686 B CN102091686 B CN 102091686B
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Abstract
The invention relates to a spraying method which comprises the following steps: providing a work piece with a to-be-sprayed surface; spraying a liquid-state coating with the viscosity of 1-8 cP onto the surface of the work piece; carrying out high-temperature pre-baking, namely pre-baking the work piece at 50-80 DEG C for 10-90 seconds; carrying out low-temperature pre-baking, namely pre-baking the work piece at 30-50 DEG C for 1-4 minutes while controlling the inclination of the to-be-sprayed surface of the work piece at less than 20 degrees; and carrying out high-temperature oven-drying, namely oven-drying the work piece at 50-80 DEG C for 5-15 minutes. Through the steps of high-temperature pre-baking, low-temperature pre-baking and high-temperature oven-drying, the sprayed coating has uniform thickness and has less possibility of forming pinholes; and during low-temperature pre-baking, the inclination of the work piece is only less than 20 degrees, and during high-temperature pre-baking, the work piece can be placed with a larger inclination. By utilizing the spraying method provided by the invention, the utilization rate of baking equipment is improved, and the baking cost is lowered.
Description
Technical field
The present invention relates to a kind of spraying method.
Background technology
The shell of general consumer electronic product such as mobile phone or computer etc. carries out the application of outer surface usually to reach the decorative purpose of beautifying shell.During spraying, paint or printing ink are sprayed on surface of the work, form after the solvent evaporates and film.Workpiece when oven dry, must keep spraying face substantially level baking filming of top when preventing from placement move down, make the lower limb of filming thick, however the sheet-like workpiece horizontal positioned toast and make the workpiece amount of every layer of placement of baking oven less, it is higher to toast cost.
Summary of the invention
In view of above-mentioned condition, be necessary to provide a kind of baking lower-cost spraying method.
A kind of spraying method may further comprise the steps:
One workpiece is provided, and this workpiece has to be sprayed;
Spraying is the surface that the liquid coating of 1cP～8cP is sprayed into workpiece with viscosity;
The high temperature prebake conditions places 50 ℃～80 ℃ temperature conditions to toast 10 seconds to 90 seconds down workpiece;
The low temperature prebake conditions places 30 ℃～50 ℃ temperature conditions to toast 1 minute to 4 minutes down workpiece, and the gradient of Workpiece painting face is in 20 degree in the bake process;
Hyperthermia drying places 50 ℃～80 ℃ temperature conditions to toast 5 minutes to 15 minutes down workpiece.
The high temperature prebake conditions can be removed the partial solvent in the spraying liquid coating fast, reduces the flowability of filming.The time of high temperature prebake conditions is shorter, and the solvent in filming in the time of can avoiding high temperature and the surface of workpiece react and corrode workpiece.The low temperature prebake conditions can be removed the partial solvent in the spraying liquid coating slowly.Filming during the low temperature prebake conditions has certain fluidity, and simultaneously the rate of volatilization of solvent is less, makes that filming can flow in the formed hole of solvent evaporates when solvent evaporates after, thus when avoiding toasting owing to solvent evaporates the too fast defective such as pin hole that forms.The solvent that hyperthermia drying can thoroughly be removed in filming parches filming of surface of the work fully.High temperature prebake conditions, three steps of low temperature prebake conditions and hyperthermia drying cooperate make spraying coating thickness evenly and be difficult for forming defective such as pin hole.Simultaneously, the high temperature prebake conditions reduces the flowability of filming, and can carry out in the scope of workpiece gradient less than 20 degree when making the low temperature prebake conditions, and workpiece can be put with bigger angle of inclination during hyperthermia drying, thereby improve the utilization rate of roasting plant, reduce the baking cost.
The specific embodiment
Below in conjunction with embodiment spraying method of the present invention is described in further detail.
Embodiment one: a kind of spraying method may further comprise the steps:
Step 1 provides a workpiece, and this workpiece has to be sprayed.
Step 2, spraying is that to be sprayed into to be sprayed of workpiece be that 5 μ m-60 μ m film to form thickness for the liquid coating of 1cP with viscosity.In the present embodiment, liquid coating is an acrylic coating, and the solvent of liquid coating is an oxolane, acetone, methyl acetate, ethyl acetate, butanone, isopropyl acetate, the positive acetone of methyl, positive propyl acetate, methyl iso-butyl ketone (MIBK) (MIBK), isobutyl acetate, the 2-nitropropane, n-butyl acetate, propylene glycol monomethyl ether, methyl isoamyl ketone (MIAK), methyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, pentyl acetate, methyl-n-amyl ketone, isobutyl isobutyrate, ethoxy ether, cyclohexanone, the propane diols single-butyl ether, propane diols list propyl ether, ethyl cellosolve acetate, isobutyrone (DIBK), glycol propyl ether, DAA, butyl glycol ether, propane diols butyl ether, formic acid-2-ethylhexyl ester, the butyl glycol ether acetic acid esters, dipropylene glycol methyl ether, glycol diacetate, diethylene glycol dimethyl ether, diethylene glycol ether, diethylene glycol propyl ether, glycol hexyl ether, the diethylene glycol ether acetic acid esters, the diethylene glycol butyl ether, ethylene glycol-2-ethyl hexyl ether, diethylene glycol butyl ether acetic acid esters, the third two single phenyl ethers, methyl alcohol, ethanol, isopropyl alcohol, normal propyl alcohol, the 2-butanols, isobutanol, n-butanol, methyl isobutyl carbinol, amylalcohol, cyclohexanol, carrene, perchloroethylene, toluene, naphtha, the mixture of one or more in the dimethylbenzene.To account for the percentage of coating gross mass be 10% to solid masses in this liquid coating.
Step 3, the high temperature prebake conditions, it is baking 90 seconds in 50 ℃ the baking oven that workpiece is positioned over temperature, makes the spraying face of workpiece reach maximum perpendicular to the projected area on the plane of gravity action direction in the bake process.The high temperature prebake conditions can be removed the partial solvent in the liquid coating fast, reduces the flowability of filming.
Step 4, the low temperature prebake conditions is that to be positioned over temperature after 50 ℃ baking oven takes out be baking 4 minutes in 30 ℃ the baking oven with workpiece from temperature, the gradient of Workpiece painting face is in 20 degree in the bake process.The low temperature prebake conditions can be removed the partial solvent in the spraying liquid coating slowly.Filming during the low temperature prebake conditions has certain fluidity, and simultaneously the rate of volatilization of solvent is less, makes that filming can flow in the formed hole of solvent evaporates when solvent evaporates after, thus defectives such as the formation pin hole of filming when avoiding toasting.
Step 5, hyperthermia drying is that to be positioned over temperature after 30 ℃ baking oven takes out be baking 15 minutes in 50 ℃ the baking oven with workpiece from temperature.The filming of surface of the work of handling through step 4 has cured, but contain a spot of solvent in filming in addition, film softer this moment, poor-performing and be inconvenient to deposit, and the solvent that hyperthermia drying can thoroughly be removed in filming parches filming of surface of the work fully.
Film through high temperature prebake conditions, low temperature prebake conditions and hyperthermia drying, can remove the solvent in filming.The high temperature prebake conditions can be removed the partial solvent in the liquid coating fast, reduces the flowability of filming.Simultaneously, the time of high temperature prebake conditions is shorter, and the solvent in filming in the time of can avoiding high temperature and the surface of workpiece react and corrode workpiece; The low temperature prebake conditions has certain removing slowly when mobile and desolvates filming, and can prevent defectives such as the too fast formation pin hole of solvent evaporates; The solvent that hyperthermia drying is thoroughly removed in filming parches filming of surface of the work fully.Reduced the flowability of filming after the high temperature prebake conditions, at this moment, when workpiece tilts to place, the influence that is not vulnerable to gravity of filming of top flows downward, can carry out in the scope of workpiece gradient less than 20 degree when making the low temperature prebake conditions, workpiece can be put with bigger angle of inclination during hyperthermia drying, thereby has improved the utilization rate of roasting plant, reduces the cost of baking.
Further, workpiece can also be placed 30 seconds under 25 ℃ temperature conditions after step 2, be made the liquid coating levelling of surface of the work, this moment, the spraying face of workpiece should the cardinal principle level.When the liquid coating that uses during, after step 5, also can carry out ultraviolet light polymerization so that the solid generation chemical reaction in the liquid coating and solidifying to workpiece as ultraviolet-curing paint.
Embodiment two: a kind of spraying method may further comprise the steps:
Step 1 provides a workpiece, and this workpiece has to be sprayed.
Step 2, spraying is that to be sprayed into to be sprayed of workpiece be that 5 μ m-60 μ m film to form thickness for the liquid coating of 8cP with viscosity.In the present embodiment, liquid coating is an acrylic coating, and the solvent of liquid coating is an oxolane, acetone, methyl acetate, ethyl acetate, butanone, isopropyl acetate, the positive acetone of methyl, positive propyl acetate, methyl iso-butyl ketone (MIBK) (MIBK), isobutyl acetate, the 2-nitropropane, n-butyl acetate, propylene glycol monomethyl ether, methyl isoamyl ketone (MIAK), methyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, pentyl acetate, methyl-n-amyl ketone, isobutyl isobutyrate, ethoxy ether, cyclohexanone, the propane diols single-butyl ether, propane diols list propyl ether, ethyl cellosolve acetate, isobutyrone (DIBK), glycol propyl ether, DAA, butyl glycol ether, propane diols butyl ether, formic acid-2-ethylhexyl ester, the butyl glycol ether acetic acid esters, dipropylene glycol methyl ether, glycol diacetate, diethylene glycol dimethyl ether, diethylene glycol ether, diethylene glycol propyl ether, glycol hexyl ether, the diethylene glycol ether acetic acid esters, the diethylene glycol butyl ether, ethylene glycol-2-ethyl hexyl ether, diethylene glycol butyl ether acetic acid esters, the third two single phenyl ethers, methyl alcohol, ethanol, isopropyl alcohol, normal propyl alcohol, the 2-butanols, isobutanol, n-butanol, methyl isobutyl carbinol, amylalcohol, cyclohexanol, carrene, perchloroethylene, toluene, naphtha, the mixture of one or more in the dimethylbenzene.To account for the percentage of coating gross mass be 50% to solid masses in this liquid coating.
Step 3, the high temperature prebake conditions, it is baking 10 seconds in 80 ℃ the baking oven that workpiece is positioned over temperature, the spraying face that makes workpiece in the bake process is reaching 0.966 times of maximal projection area perpendicular to the projected area on the plane of gravity action direction.
Step 4, the low temperature prebake conditions is that to be positioned over temperature after 80 ℃ baking oven takes out be baking 1 minute in 50 ℃ the baking oven with workpiece from temperature, the gradient of Workpiece painting face is in 15 degree in the bake process.
Step 5, hyperthermia drying is that to be positioned over temperature after 50 ℃ baking oven takes out be baking 5 minutes in 80 ℃ the baking oven with workpiece from temperature.
Further, workpiece can also be placed 30 seconds under 30 ℃ temperature conditions after step 2, be made the liquid coating levelling of surface of the work, this moment, the spraying face of workpiece should the cardinal principle level.When the liquid coating that uses during, after step 5, also can carry out ultraviolet light polymerization so that the solid generation chemical reaction in the liquid coating and solidifying to workpiece as ultraviolet-curing paint.
Embodiment three: a kind of spraying method may further comprise the steps:
Step 1 provides a workpiece, and this workpiece has to be sprayed.
Step 2, spraying is that to be sprayed into to be sprayed of workpiece be that 5 μ m-60 μ m film to form thickness for the liquid coating of 4cP with viscosity.In the present embodiment, liquid coating is an acrylic coating, and the solvent of liquid coating is an oxolane, acetone, methyl acetate, ethyl acetate, butanone, isopropyl acetate, the positive acetone of methyl, positive propyl acetate, methyl iso-butyl ketone (MIBK) (MIBK), isobutyl acetate, the 2-nitropropane, n-butyl acetate, propylene glycol monomethyl ether, methyl isoamyl ketone (MIAK), methyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, pentyl acetate, methyl-n-amyl ketone, isobutyl isobutyrate, ethoxy ether, cyclohexanone, the propane diols single-butyl ether, propane diols list propyl ether, ethyl cellosolve acetate, isobutyrone (DIBK), glycol propyl ether, DAA, butyl glycol ether, propane diols butyl ether, formic acid-2-ethylhexyl ester, the butyl glycol ether acetic acid esters, dipropylene glycol methyl ether, glycol diacetate, diethylene glycol dimethyl ether, diethylene glycol ether, diethylene glycol propyl ether, glycol hexyl ether, the diethylene glycol ether acetic acid esters, the diethylene glycol butyl ether, ethylene glycol-2-ethyl hexyl ether, diethylene glycol butyl ether acetic acid esters, the third two single phenyl ethers, methyl alcohol, ethanol, isopropyl alcohol, normal propyl alcohol, the 2-butanols, isobutanol, n-butanol, methyl isobutyl carbinol, amylalcohol, cyclohexanol, carrene, perchloroethylene, toluene, naphtha, the mixture of one or more in the dimethylbenzene.To account for the percentage of coating gross mass be 30% to solid masses in this liquid coating.
Step 3, the high temperature prebake conditions, it is baking 30 seconds in 70 ℃ the baking oven that workpiece is positioned over temperature, makes the spraying face of workpiece reach maximum perpendicular to the projected area on the plane of gravity action direction in the bake process.
Step 4, the low temperature prebake conditions is that to be positioned over temperature after 70 ℃ baking oven takes out be baking 3 minutes in 45 ℃ the baking oven with workpiece from temperature, the gradient of Workpiece painting face is in 20 degree in the bake process.
Step 5, hyperthermia drying is that to be positioned over temperature after 45 ℃ baking oven takes out be baking 8 minutes in 70 ℃ the baking oven with workpiece from temperature.
Further, workpiece can also be placed 60 seconds under 20 ℃ temperature conditions after step 2, be made the liquid coating levelling of surface of the work, this moment, the spraying face of workpiece should the cardinal principle level.When the liquid coating that uses during, after step 5, also can carry out ultraviolet light polymerization so that the solid generation chemical reaction in the liquid coating and solidifying to workpiece as ultraviolet-curing paint.
Embodiment four: a kind of spraying method may further comprise the steps:
Step 1 provides a workpiece, and this workpiece has to be sprayed.
Step 2, spraying is that to be sprayed into to be sprayed of workpiece be that 5 μ m-60 μ m film to form thickness for the liquid coating of 6cP with viscosity.In the present embodiment, liquid coating is an acrylic coating, and the solvent of liquid coating is an oxolane, acetone, methyl acetate, ethyl acetate, butanone, isopropyl acetate, the positive acetone of methyl, positive propyl acetate, methyl iso-butyl ketone (MIBK) (MIBK), isobutyl acetate, the 2-nitropropane, n-butyl acetate, propylene glycol monomethyl ether, methyl isoamyl ketone (MIAK), methyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, pentyl acetate, methyl-n-amyl ketone, isobutyl isobutyrate, ethoxy ether, cyclohexanone, the propane diols single-butyl ether, propane diols list propyl ether, ethyl cellosolve acetate, isobutyrone (DIBK), glycol propyl ether, DAA, butyl glycol ether, propane diols butyl ether, formic acid-2-ethylhexyl ester, the butyl glycol ether acetic acid esters, dipropylene glycol methyl ether, glycol diacetate, diethylene glycol dimethyl ether, diethylene glycol ether, diethylene glycol propyl ether, glycol hexyl ether, the diethylene glycol ether acetic acid esters, the diethylene glycol butyl ether, ethylene glycol-2-ethyl hexyl ether, diethylene glycol butyl ether acetic acid esters, the third two single phenyl ethers, methyl alcohol, ethanol, isopropyl alcohol, normal propyl alcohol, the 2-butanols, isobutanol, n-butanol, methyl isobutyl carbinol, amylalcohol, cyclohexanol, carrene, perchloroethylene, toluene, naphtha, the mixture of one or more in the dimethylbenzene.To account for the percentage of coating gross mass be 40% to solid masses in this liquid coating.
Step 3, the high temperature prebake conditions, it is baking 30 seconds in 70 ℃ the baking oven that workpiece is positioned over temperature, makes the spraying face of workpiece reach maximum perpendicular to the projected area on the plane of gravity action direction in the bake process.
Step 4, the low temperature prebake conditions is that to be positioned over temperature after 70 ℃ baking oven takes out be baking 3 minutes in 45 ℃ the baking oven with workpiece from temperature, the gradient of Workpiece painting face is in 20 degree in the bake process.
Step 5, hyperthermia drying is that to be positioned over temperature after 45 ℃ baking oven takes out be baking 12 minutes in 70 ℃ the baking oven with workpiece from temperature.
Further, workpiece can also be placed 30 seconds under 25 ℃ temperature conditions after step 2, be made the liquid coating levelling of surface of the work, this moment, the spraying face of workpiece should the cardinal principle level.When the liquid coating that uses during, after step 5, also can carry out ultraviolet light polymerization so that the solid generation chemical reaction in the liquid coating and solidifying to workpiece as ultraviolet-curing paint.
Claims (10)
1. spraying method may further comprise the steps:
One workpiece is provided, and this workpiece has to be sprayed;
Spraying is the surface that the liquid coating of 1cP～8cP is sprayed into workpiece with viscosity;
The high temperature prebake conditions places 50 ℃～80 ℃ temperature conditions to toast 10 seconds to 90 seconds down workpiece;
The low temperature prebake conditions places 30 ℃～50 ℃ temperature conditions to toast 1 minute to 4 minutes down workpiece, and the gradient of Workpiece painting face is in 20 degree in the bake process;
Hyperthermia drying places 50 ℃～80 ℃ temperature conditions to toast 5 minutes to 15 minutes down workpiece.
2. spraying method as claimed in claim 1, it is characterized in that: during the high temperature prebake conditions, place 70 ℃ temperature conditions to toast 30 seconds down workpiece, the spraying face of workpiece is being reached perpendicular to the projected area on the plane of gravity action direction between maximum and maximum 0.966 times.
3. spraying method as claimed in claim 1 is characterized in that: during the low temperature prebake conditions, place 45 ℃ temperature conditions to toast 3 minutes down workpiece.
4. spraying method as claimed in claim 1 is characterized in that: during hyperthermia drying, place 70 ℃ temperature conditions to toast 8 minutes to 12 minutes down workpiece.
5. spraying method as claimed in claim 1 is characterized in that: before the high temperature prebake conditions workpiece is placed 30-60 second under 20 ℃～30 ℃ temperature conditions.
6. spraying method as claimed in claim 1 is characterized in that: it is 5 μ m-60 μ m that liquid coating is sprayed onto the coating layer thickness that forms on the workpiece.
7. spraying method as claimed in claim 1 is characterized in that: described liquid coating is an acrylic coating.
8. spraying method as claimed in claim 1 is characterized in that: the solvent in the described liquid coating is an oxolane, acetone, methyl acetate, ethyl acetate, butanone, isopropyl acetate, the positive acetone of methyl, positive propyl acetate, methyl iso-butyl ketone (MIBK) (MIBK), isobutyl acetate, 2-nitropropane, n-butyl acetate, propylene glycol monomethyl ether, methyl isoamyl ketone (MIAK), methyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, pentyl acetate, methyl-n-amyl ketone, isobutyl isobutyrate, the ethoxy ether, cyclohexanone, propane diols single-butyl ether, propane diols list propyl ether, ethyl cellosolve acetate, isobutyrone (DIBK), glycol propyl ether, DAA, butyl glycol ether, the propane diols butyl ether, formic acid-2-ethylhexyl ester, butyl glycol ether acetic acid esters, dipropylene glycol methyl ether, glycol diacetate, diethylene glycol dimethyl ether, diethylene glycol ether, the diethylene glycol propyl ether, glycol hexyl ether, diethylene glycol ether acetic acid esters, diethylene glycol butyl ether, ethylene glycol-2-ethyl hexyl ether, diethylene glycol butyl ether acetic acid esters, the third two single phenyl ethers, methyl alcohol, ethanol, isopropyl alcohol, normal propyl alcohol, 2-butanols, isobutanol, n-butanol, methyl isobutyl carbinol, amylalcohol, cyclohexanol, carrene, perchloroethylene, toluene, naphtha, the mixture of one or more in the dimethylbenzene.
9. spraying method as claimed in claim 1 is characterized in that: the percentage that the preceding solid masses of described liquid coating baking accounts for the coating gross mass is 10%～50%.
10. spraying method as claimed in claim 1 is characterized in that: described liquid coating is a ultraviolet-curing paint, carries out ultraviolet light polymerization behind the hyperthermia drying to filming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910311447 CN102091686B (en) | 2009-12-15 | 2009-12-15 | Spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910311447 CN102091686B (en) | 2009-12-15 | 2009-12-15 | Spraying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102091686A CN102091686A (en) | 2011-06-15 |
| CN102091686B true CN102091686B (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910311447 Expired - Fee Related CN102091686B (en) | 2009-12-15 | 2009-12-15 | Spraying method |
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| Country | Link |
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| CN (1) | CN102091686B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665251A (en) * | 2016-03-23 | 2016-06-15 | 柳州一健科技有限公司 | Spraying treatment method for mobile telephone shells |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223452A (en) * | 1998-01-14 | 1999-07-21 | 松下电子工业株式会社 | Method for manufacturing cathode-ray tube |
| CN101574687A (en) * | 2008-05-07 | 2009-11-11 | 中国第一汽车集团公司 | Powder coating energy-saving solidifying method |
-
2009
- 2009-12-15 CN CN 200910311447 patent/CN102091686B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223452A (en) * | 1998-01-14 | 1999-07-21 | 松下电子工业株式会社 | Method for manufacturing cathode-ray tube |
| CN101574687A (en) * | 2008-05-07 | 2009-11-11 | 中国第一汽车集团公司 | Powder coating energy-saving solidifying method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-331267A 2002.11.19 |
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Effective date of registration: 20151028 Address after: 225400 Taixing medicine high tech Zone, Jiangsu, China, Taizhou Patentee after: Hu Lichun Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Patentee before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. Patentee before: Hon Hai Precision Industry Co., Ltd. |
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Effective date of registration: 20160216 Address after: 523710 Guangdong Province, Dongguan city Tangxia town Shahu Xinyuan Road No. 20 Patentee after: DONGGUAN ZHONG CHUANG PLASTIC PRODUCTS CO., LTD. Address before: 225400 Taixing medicine high tech Zone, Jiangsu, China, Taizhou Patentee before: Hu Lichun |
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Granted publication date: 20130731 Termination date: 20171215 |