CN205007944U - A automatic material conveying equipment for preparing polyimide resin - Google Patents
A automatic material conveying equipment for preparing polyimide resin Download PDFInfo
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- CN205007944U CN205007944U CN201520751796.4U CN201520751796U CN205007944U CN 205007944 U CN205007944 U CN 205007944U CN 201520751796 U CN201520751796 U CN 201520751796U CN 205007944 U CN205007944 U CN 205007944U
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Abstract
The utility model discloses an automatic material conveying equipment for preparing polyimide resin, including solvent conveying system, 2 set at least powder conveying system, clamp shell type reation kettle, temperature sensor, viscosity on -line measuring appearance and automatic control unit, solvent conveying system includes chemical industry solution delivery pump, flowmeter, powder conveying system is including the powder storage silo, powder transport ware and the automatic material conveying device that connect gradually, the automatic material conveying device is including the hopper, weighing sensor, blender and the powder pusher that connect gradually, heating device and agitating unit are installed to the powder storage silo. The utility model discloses a polyimide resin when production automatic material conveying, automatic control, technology is succinct, the precision is high, efficient.
Description
Technical field
The utility model belongs to organic synthesis polymerisation in solution apparatus field, is specifically related to a kind of automatic charging equipment for the preparation of polyimide resin.
Background technology
Polyimide material with the electric property of the resistance to high/low temperature of its excellence, radiation hardness, weather-proof etc. and excellence, and is widely used in the fields such as electric wire, cable, petroleum industry, Aero-Space.
The preparation method of polyimide material is a lot, but no matter any method, all need to use reactor first to prepare polyimide resin, and polyimide resin method of preparing conventional is at present in batch reactor, by manually constantly adding the raw material of regulation.Although this method is easy to implement, the reinforced time interval, feeding quantity are affected by human factors comparatively large, and the control of its production technology is difficult to accomplish to stablize, and fluctuate comparatively large, therefore for following process brings very burden, and then affect product quality between batch.In addition, this mode, has a large amount of dust when reinforced, and solvent is emitted in environment, causes certain pollution to environment, also produces certain influence to workers ' health.
Raw material for the preparation of polyimide resin is diamines and dianhydride, and moisture-sensitive is lumpd, and easily blocks discharging opening, also should not use Cemented filling, inapplicable existing charging (feeding) equipment after opening; At present, Yan Yuegao is got over to the requirement of polyimide resin, cost of labor is increasing, environmental requirement is more strict, in the urgent need to researching and developing the auto feed control appliance of a kind of high efficiency, high accuracy, safety and environmental protection.
Summary of the invention
The purpose of this utility model is to provide a kind of automatic charging equipment for the preparation of polyimide resin, and its concise in technology, precision is high, efficiency is high, overcomes the defect that hand stock is dangerous, unstable, has wide prospects for commercial application.
Raw material quantitative is delivered in reactor or storage bin with equipment such as chemical industry delivery pump, powder conveying devices by the utility model first, and when achieving synthesis by the pusher of precision, quantitative, the timing of raw material adds; By temperature sensor, LOAD CELLS, viscosity In-circiut tester etc., course of reaction is uninterruptedly monitored simultaneously; Finally ensure that the stability of product qualities.
To achieve the above object of the invention, the technical solution adopted in the utility model is:
For the preparation of an automatic charging equipment for polyimide resin, comprise solvent delivery system, at least 2 cover powder delivery system, jacket type reactor, temperature sensor, viscosity on-line detector and automatic control units; Described solvent delivery system comprises chemical industry solution delivery pump, flowmeter; Described powder delivery system comprise connect successively powder storing storehouse, powder conveying device and automatic feeding device; Described automatic feeding device comprises the hopper, LOAD CELLS, blender and the powder pusher that connect successively; Described powder storing storehouse is provided with heater and agitating device.
Connected by pipeline between each device of the utility model, check (non-return) valve, motor-driven valve or magnetic valve are set on pipeline simultaneously, those skilled in the art can arrange valve kind and quantity as required, thus can pass through the opening and closing of automatic control unit by-pass valve control, for material transport.
In the utility model, jacket reactor is the place of preparing polyimide resin, and all raw materials all add wherein, and it comprises multiple charging aperture and detects mouth, observation panel.Solvent, powder, powder by pipeline independently, controlled, be added in reactor automatically, flowmeter, powder pusher are connected with reactor charging aperture respectively by pipeline.In order to the impurity in filtering solution, improve reaction purity, ensure product characteristics, the utility model also comprises filter press, and it is positioned at below reactor.In order to obtain response parameter and reaction process in real time, the utility model also arranges pressure sensor, current transformer, and Monitoring Data is sent to control unit.
In technique scheme, stainless steel tank body, heater, agitating device and atmosphere protection device are contained in described powder storing storehouse; Described stainless cylinder of steel leaves gas outlet, charging aperture, discharging opening, and installs agitating device; Described agitating device can be conventional whisk; Described heater is the flexible heater with temperature controller; The peripheral coated flexible heater of stainless steel tank body, effectively avoids the raw material moisture absorption, caking; The uniformity arranging the heating improving powder further of agitating device, improves moisture effect; Described atmosphere protection device is made up of air shooter and by-pass valve control, wherein air shooter is connected with by-pass valve control through after stainless steel tank body, accept protection source of the gas, the part that air shooter is positioned at stainless steel tank body is provided with venthole, for carrying protective gas to stainless steel tank body; Use gas shield to effectively reduce oxygen content in tank body, thus avoid material by eremacausis or make moist.
In technique scheme, all parts contacted with material of automatic feeding device all use 316L stainless steel material to make, and comprise the hopper, LOAD CELLS, blender and the powder pusher that connect successively; Described hopper is made up of cone-shaped stainless steel cylindrical shell and flexible heater, and flexible heater, can be consistent with the heater in powder storing storehouse with temperature control, is coated on outside conical shell; Described automatic feeding device also comprises support, in order to support relevant device; Described LOAD CELLS is fixed on support, is positioned at below hopper discharging opening; Powder material is stored in powder storing storehouse, enters in cone-shaped stainless steel hopper, enter blender from hopper discharging opening after LOAD CELLS is weighed during use through powder conveying device, then enters in jacket reactor under the effect of powder pusher.
In the utility model, accurately can control feeding quantity by LOAD CELLS; Blender self-carrying mixing, by blender before powder enters powder pusher, pulverizes material, disperses, and avoids bulk materials to enter powder pusher, result in blockage or charging uneven.Automatic control unit, then according to analytical reactions parameter as temperature, viscosity, electric current etc., control feed rate and reaction temperature by each valve, propeller etc.; These parameters constantly compare with setting endpoint parameter by control unit simultaneously, when reaching reaction end, terminate to feed intake, and send production end prompting.
In technique scheme, the heater that hopper, powder storing storehouse use is flexible heater, even, convenient temperature control of heating; Described automatic control unit is made up of monitoring means, cyclelog, operation screen, can control the interpolation of raw material according to response situation; Cyclelog is conventional program controller, commercially available.
General, the raw material producing polyimide resin is two kinds of powders, and select 2 cover powder delivery systems to satisfy the demand, when needs add other particular components, those skilled in the art can select the above powder delivery system of 2 cover as required.
During production, dimethylacetylamide is quantitatively injected in reactor by chemical industry solution delivery pump, flowmeter from solvent tank, and by powder delivery system the diamines powder that sealing is preserved added with certain speed and be equipped with in the reactor of dimethylacetylamide, stir certain hour, diamines is fully dissolved; Use filter press to filter the diamines dissolved, the solid removed in raw material and system is mixed.Then use another set of powder delivery system quantitatively to add dianhydride to containing in the reactor of two amine aqueous solutions in batches, and control response parameter, be obtained by reacting polyimide resin.
During polyimide resin synthesis, its quality is subject to feed way, charging rate, reaction temperature and the impact in reaction time, and the uniformity that dianhydride feeds in raw material seems particularly important, be directly connected to the speed of reaction, and then affect molecular weight and the molecular weight distribution of polyimide resin, add speed fast or uneven, polymerisation local will be made violent, and molecular weight rises rapidly, increases the width of molecular weight distribution, reduce molecular activity, thus affect subsequent reactions.The feed way of current routine, but cannot effectively avoid this defect, causes poor stability between final polyimide resin batch, and then affects the quality of final products; Meanwhile, current hand stock is open, and large content of starting materials is emitted in air, causes certain pollution to environment.Automatic charging equipment auto feed of the present utility model is easy and simple to handle, and the resin quality of synthesis is stable, whole building-up process full automation, achieves beyond thought effect.
Because technique scheme is used, the utility model compared with prior art has following advantages:
1. the utility model makes public for the first time the automatic charging equipment that can will prepare raw material that polyimide resin uses and make to carry in an automated fashion completely, material is avoided to be secondary polluted, and then be beneficial to the automation of rear operation, ensure the stay in grade of polyimide resin; Make the synthesis of polyimide resin realize automation and become possibility, greatly enhance productivity, reduce costs.
2. the utility model is disclosed for the preparation of in the automatic charging equipment of polyimide resin, heats first and the mode of atmosphere protection, avoid the material moisture absorption to go bad, ensure that purity and the reactivity of raw material when raw material uses or store.
3. the utility model is disclosed high for the preparation of the automatic charging equipment precision of polyimide resin, LOAD CELLS, blender etc. can realize charging technology more accurately, avoid powder to lump simultaneously, be conducive to reacting even, controlled carrying out, thus substantially increase the uniformity of reaction in reactor, ensure the greater homogeneity of product polyimide resin.
4. the disclosed automatic charging equipment for the preparation of polyimide resin of the utility model is closed system, and composition rationally, meets requirement and the direction of contemporary green chemistry; And can the quality of high-precision control polyimide resin; During preparing product, technique is simple, production efficiency is high, and the product uniformity obtained is good, quality is high, is suitable for automatic industrial and produces.
Accompanying drawing explanation
Fig. 1 is the structural representation for the preparation of the automatic charging equipment of polyimide resin in embodiment one;
Fig. 2 is the structural representation in powder storing storehouse in embodiment one;
Fig. 3 is the structural representation of automatic feeding device in embodiment one;
Wherein, 1, solvent delivery system; 11, chemical industry solution delivery pump; 12, flowmeter; 2, diamines powder delivery system; 21, powder storing storehouse; 211, stainless steel tank body; 212, air shooter; 213, heater; 214, agitating device; 215, by-pass valve control; 216, venthole; 22, powder conveying device; 23, automatic feeding device; 231, hopper; 232, flexible heater; 233, support; 234, LOAD CELLS; 235, anti-inclination block; 236, blender; 237, powder pusher; 238, powder pusher discharging opening; 3, dianhydride powder delivery system; 4, filter press; 5, viscosity on-line detector; 6, pressure sensor; 7, temperature sensor; 8, current transformer; 9, jacket type reactor;
Fig. 4 is the viscosity batch variation figure of polyimide resin prepared by the utility model equipment and prior art.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the utility model is further described:
Embodiment one is for the preparation of the automatic charging equipment of polyimide resin
As shown in Figures 1 to 3, the present embodiment comprises solvent delivery system 1, diamines powder delivery system 2, dianhydride powder delivery system 3 for the preparation of the automatic charging equipment of polyimide resin; Described solvent delivery system 1 comprises chemical industry solution delivery pump 11, flowmeter 12; Described diamines powder delivery system 2 comprise connected successively by pipeline powder storing storehouse 21, powder conveying device 22 and automatic feeding device 23; Described automatic feeding device comprises the hopper 231, LOAD CELLS 234, blender 236 and the powder pusher 237 that connect successively; Chemical industry solution delivery pump is communicated with solvent tank (prior art does not mark in figure) and flowmeter 12; Flowmeter 12, powder pusher 237 are connected with jacket type reactor 9 respectively by pipeline, and material can be transferred in reactor; Described dianhydride powder delivery system 3 comprise connected successively by pipeline powder storing storehouse, powder conveying device, hopper, LOAD CELLS, blender and powder pusher; Flowmeter, powder pusher are connected with jacket type reactor respectively by pipeline, and material can be transferred in reactor.Material transferring pipeline arranges check (non-return) valve, magnetic valve and motor-driven valve as required, controls material transferring state, prevent feed back, in order to Reference numeral is succinct, omit the mark of traditional valve.Diamines powder delivery system and dianhydride powder delivery system form with structure consistent, in order to Reference numeral is succinct, omit the mark of dianhydride powder delivery system.
Filter press 4 is provided with below jacket reactor, can effective filtering solution impurity, ensure reaction purity; Also be provided with viscosity on-line detector 5, pressure sensor 6, temperature sensor 7, current transformer 8, can detection reaction process in real time, record Signal transmissions to automatic control unit, automatic control unit can the opening and closing of by-pass valve control, chemical industry solution delivery pump, powder conveying device, powder pusher switch, can realize according to reaction actual conditions, material adds automatically.
Automatic control unit is made up of monitoring means, program control system, operation screen, can control the interpolation of raw material according to response situation; Program control system is conventional program controller, commercially available; Those skilled in the art can arrange automatic control unit according to real space position, and in order to Reference numeral is succinct, the present embodiment accompanying drawing does not represent.
Above-mentioned powder storing storehouse 21, comprises stainless steel tank body 211, heater 213, atmosphere protection device and agitating device 214.Atmosphere protection device is made up of air shooter 212 and by-pass valve control 215, and air shooter is provided with venthole 216; Wherein air shooter is connected with by-pass valve control through after stainless steel tank body, accepts protection source of the gas, uses gas shield to effectively reduce oxygen content in tank body, thus avoids material by eremacausis or make moist.Stainless steel tank body 211 leaves charging aperture, anti-dust exhaust outlet and discharging opening; Heater 213 is the flexible heater with temperature controller, is coated on stainless steel tank body periphery; Effectively avoid the raw material moisture absorption, caking; The uniformity arranging the heating improving powder further of agitating device 214, improve moisture effect, it is conventional whisk.Each mouth is all provided with magnetic valve or motor-driven valve, and controls discharging, reinforced condition by control unit.
Hopper 231, support 233, LOAD CELLS 234, blender 236 and powder pusher 237 form automatic feeding device 23; Hopper 231 is made up of cone-shaped stainless steel cylindrical shell and flexible heater 232, and flexible heater is coated on outside conical shell; Anti-dust exhaust outlet and charging aperture are left in cone-shaped stainless steel cylindrical shell top, and wherein charging aperture is connected by powder conveying device 22 with the discharging opening in powder storing storehouse 21, can transferring raw material; Support 233 can settle relevant device, saves local, uniform, is provided with anti-inclination block 235, prevents automatic feeding device from rolling when shaking.Described LOAD CELLS 234 is positioned at below hopper 231 discharging opening.After raw material enters broach hopper, under the protection of heating, keep away from moisture rotten; Accurately control to add speed and addition by LOAD CELLS and powder pusher, material enters reactor by the discharging opening 238 of powder pusher 237.Blender and powder pusher control (one enters scene 2) respectively by same reductor, and reductor is controlled by electro-motor.Owing to adding high-precision weighing unit and controlled pusher, program automatic analysis course of reaction, when making synthesis, automatically regulate addition according to synthesis situation, finally make resins synthesis more stable, quality is higher.
Dimethylacetylamide passes through solvent delivery system, in quantitative injection reactor, being added with certain speed by the diamines powder that sealing is preserved by diamines powder delivery system is equipped with in the reactor of acetamide, stir certain hour, diamines is fully dissolved, uses filter press to filter the diamines dissolved; Then add dianhydride by dianhydride powder delivery system in batches, and control response parameter, obtain polyimide resin.
The preparation of polyimide resin
Adopt the said equipment, first by 950KgN, N-dimethylacetylamide, be delivered in reactor, add 4,4-diaminodiphenyl ether 113.74kg by diamines powder delivery system is disposable in solvent, stir 40 minutes; Filter press is used to filter the diamines dissolved; Then use dianhydride powder delivery system to add pyromellitic acid anhydride stage by stage to containing in the reactor of two amine aqueous solutions, concrete charging technology is as table 1 in batches.
Table 1 dianhydride adds technique
| First stage | 0-60 minute | Dianhydride adds speed: 60 ± 0.5kg/h |
| Second stage | 60-150 minute | Dianhydride adds speed: 45 ± 0.5kg/h |
| Phase III | 150-240 minute | Dianhydride adds speed: 15 ± 0.5kg/h |
| Fourth stage | 240-300 minute | Dianhydride adds speed: 4 ± 0.2kg/h |
This reaction is exothermic reaction, and along with constantly adding of dianhydride, temperature of reaction kettle rises gradually, viscosity constantly increases, and the resistance that stirring motor is subject to is increasing, and automatic control unit is then according to the data collected, continuous analysis, and the addition adjusting cooling water, material; Simultaneously by parameter and endpoint parameter comparison, when reaching regulation end-condition, send information, end of synthesis.
Terminal point control condition: resin viscosity 50 ± 5Pa.s, temperature 60 ± 1 DEG C.During end of synthesis, use NDJ-4 rotation viscometer, if again test resin viscosity 50 ± 5Pa.s, confirm end of synthesis.
The viscosity of resin has reacted the size of polyimide molecule amount to a certain extent, and therefore general use is tested viscosity test more easily and characterized the molecular weight of resin aborning.As shown in Figure 4, add up the viscosity of existing feed way and the polyimide resin prepared by auto feed mode of the present invention, the polyimide resin prepared by this example can be found out, between batch, stability is higher, be subject to human factor impact little, full automation controls, and finally make the polyimide resin quality of preparation higher, it is more convenient to operate.
Embodiment two is for the preparation of the automatic charging equipment of polyimide resin
Equipment body structure and the embodiment one of the present embodiment are similar to, and comprise solvent delivery system, diamines powder delivery system, dianhydride powder delivery system; Wherein hopper is not containing heater, and during practical application, powder lumps a little, need the power strengthening blender, increase press filtration number of times, Operating Complexity is higher than the equipment of embodiment one, but a polyimide batch quality for preparation is also much better than prior art simultaneously.
Embodiment three is for the preparation of the automatic charging equipment of polyimide resin
Equipment body structure and the embodiment one of the present embodiment are similar to, and comprise solvent delivery system, diamines powder delivery system, dianhydride powder delivery system; Wherein powder storing storehouse is not containing atmosphere protection device, and during practical application, powder lumps a little; need the power strengthening blender; increase press filtration number of times, Operating Complexity is higher than the equipment of embodiment one, but a polyimide batch quality for preparation is also much better than prior art simultaneously.
Embodiment four is for the preparation of the automatic charging equipment of polyimide resin
Equipment body structure and the embodiment one of the present embodiment are similar to, and comprise solvent delivery system, diamines powder delivery system, dianhydride powder delivery system; Wherein containing 3 cover powder delivery systems, during practical application, the 3rd cover powder delivery system is used for adding filling modifier, and need to increase press filtration number of times, a polyimide batch quality for preparation is also much better than prior art; Particularly solve the difficult problem that the existing filler containing the existence of filler polyimide resin easily gathers, easily produces stress concentration point.
Embodiment five is for the preparation of the automatic charging equipment of polyimide resin
Equipment body structure and the embodiment one of the present embodiment are similar to, and comprise solvent delivery system, diamines powder delivery system, dianhydride powder delivery system; Wherein not containing filter press, during practical application, need the power strengthening agitating device and blender, operation power consumption, noise are higher than the equipment of embodiment one, but a polyimide batch quality for preparation is also much better than prior art.
Claims (10)
1. for the preparation of an automatic charging equipment for polyimide resin, it is characterized in that: the described automatic charging equipment for the preparation of polyimide resin comprises solvent delivery system, at least 2 cover powder delivery system, jacket type reactor, temperature sensor, viscosity on-line detector and automatic control units; Described solvent delivery system comprises chemical industry solution delivery pump, flowmeter; Described powder delivery system comprise connect successively powder storing storehouse, powder conveying device and automatic feeding device; Described automatic feeding device comprises the hopper, LOAD CELLS, blender and the powder pusher that connect successively; Described powder storing storehouse is provided with heater and agitating device.
2. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described powder storing storehouse comprises stainless steel tank body, heater, agitating device and atmosphere protection device; Described atmosphere protection device is made up of air shooter and by-pass valve control; Described air shooter is provided with venthole.
3. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described hopper comprises stainless steel cylinder, heater.
4. according to claim 2 or 3 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described heater is the flexible heater with temperature controller.
5. according to claim 3 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described stainless steel cylinder is cone-shaped stainless steel cylindrical shell.
6. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described automatic control unit is made up of monitoring means, cyclelog, operation screen.
7. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: the described automatic charging equipment for the preparation of polyimide resin also comprises filter press.
8. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: the described automatic charging equipment for the preparation of polyimide resin also comprises pressure sensor and current transformer.
9. according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: described automatic feeding device also comprises the support with anti-dumping block.
10., according to claim 1 for the preparation of the automatic charging equipment of polyimide resin, it is characterized in that: the described automatic charging equipment for the preparation of polyimide resin also comprise in magnetic valve, check (non-return) valve, motor-driven valve one or several.
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| CN201520751796.4U CN205007944U (en) | 2015-09-25 | 2015-09-25 | A automatic material conveying equipment for preparing polyimide resin |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715803A (en) * | 2017-12-01 | 2018-02-23 | 江西宏大化工有限公司 | A kind of timing feeding device of converted starch |
| CN109224956A (en) * | 2018-10-25 | 2019-01-18 | 河海大学 | A kind of agitating device preparing modified pitch for solvent method |
| CN109954448A (en) * | 2017-12-25 | 2019-07-02 | 巨石集团有限公司 | A kind of glass fiber treating compound prepares small powder automatic feeding system and its control method |
| CN111686621A (en) * | 2020-04-11 | 2020-09-22 | 长沙矿山研究院有限责任公司 | Multi-material powdery additive preparation system and preparation method |
| CN114225869A (en) * | 2021-12-16 | 2022-03-25 | 深圳市华科创智技术有限公司 | Production device of transparent polyimide slurry |
| CN115364800A (en) * | 2022-08-25 | 2022-11-22 | 东华大学 | A solution stabilization automation prepares system for preparing porous yarn |
| CN116143743A (en) * | 2023-01-08 | 2023-05-23 | 太仓市茜泾化工有限公司 | Preparation process and preparation device of 3-isobutyl glutaric anhydride |
| CN116399411B (en) * | 2023-06-08 | 2023-08-11 | 寿光诺盟化工有限公司 | Flow monitoring device for mixing reaction kettle |
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2015
- 2015-09-25 CN CN201520751796.4U patent/CN205007944U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715803A (en) * | 2017-12-01 | 2018-02-23 | 江西宏大化工有限公司 | A kind of timing feeding device of converted starch |
| CN109954448A (en) * | 2017-12-25 | 2019-07-02 | 巨石集团有限公司 | A kind of glass fiber treating compound prepares small powder automatic feeding system and its control method |
| CN109224956A (en) * | 2018-10-25 | 2019-01-18 | 河海大学 | A kind of agitating device preparing modified pitch for solvent method |
| CN111686621A (en) * | 2020-04-11 | 2020-09-22 | 长沙矿山研究院有限责任公司 | Multi-material powdery additive preparation system and preparation method |
| CN114225869A (en) * | 2021-12-16 | 2022-03-25 | 深圳市华科创智技术有限公司 | Production device of transparent polyimide slurry |
| CN115364800A (en) * | 2022-08-25 | 2022-11-22 | 东华大学 | A solution stabilization automation prepares system for preparing porous yarn |
| CN116143743A (en) * | 2023-01-08 | 2023-05-23 | 太仓市茜泾化工有限公司 | Preparation process and preparation device of 3-isobutyl glutaric anhydride |
| CN116399411B (en) * | 2023-06-08 | 2023-08-11 | 寿光诺盟化工有限公司 | Flow monitoring device for mixing reaction kettle |
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Effective date of registration: 20190830 Address after: 215011 Golden Lion Building, 12 Shishan Road, Suzhou High-tech District, Jiangsu Province, 22nd Floor Patentee after: Suzhou Kaiying Industrial Materials Co., Ltd. Address before: 226407, Jiangsu, Nantong province Rudong County town chemical industry zone Patentee before: Nantong Kai Ying thin film technique Co., Ltd |
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Effective date of registration: 20191224 Address after: 215156 book collection 888, Mu Du Town, Wuzhong District, Suzhou, Jiangsu Patentee after: Suzhou Caim insulation materials Co., Ltd. Address before: 215011 Golden Lion Building, 12 Shishan Road, Suzhou High-tech District, Jiangsu Province, 22nd Floor Patentee before: Suzhou Kaiying Industrial Materials Co., Ltd. |
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