CN203543295U - Coating microwave heating oven for waterborne polyurethane synthetic leather - Google Patents
Coating microwave heating oven for waterborne polyurethane synthetic leather Download PDFInfo
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- CN203543295U CN203543295U CN201320583416.1U CN201320583416U CN203543295U CN 203543295 U CN203543295 U CN 203543295U CN 201320583416 U CN201320583416 U CN 201320583416U CN 203543295 U CN203543295 U CN 203543295U
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Abstract
The utility model relates to a coating microwave heating oven for waterborne polyurethane synthetic leather. The coating microwave heating oven comprises an oven, and is characterized in that microwave emitting devices are arranged above a conveyor belt at the interior of the oven; exhaust gas recovery devices are arranged at the upper part of the oven; microwave absorption chambers are respectively arranged on the left side and the right side of the oven. The coating drying technology disclosed by the utility model has the characteristics of uniform heating, high drying speed, high thermal efficiency, good product quality and the like; furthermore, circulating air can timely remove a solvent which is evaporated out from the coating in a microwave heating process, so that the phenomenon of local overheating caused by high microwave heating speed and non-timely removal of the solvent is avoided, the quality of the coating is ensured, and a thorough and uniform drying effect is obtained. The device disclosed by the utility model has a simple structure, and can obtain a good coating drying effect and improve the drying speed, thereby greatly shortening the production period and improving the production efficiency.
Description
Technical field
The utility model belongs to aqueous polyurethane synthetic leather field, specifically a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven.
Background technology
Aqueous polyurethane synthetic leather is a kind of novel environment-friendly synthetic leather, and it is because environmental protection, safety, and nontoxic, the advantages such as product no solvent residue, become the synthetic leather development trend in future.But waterborne polyurethane resin is to using the solvent of water as resin, because it is larger that specific heat of water holds, so it is slower that waterborne polyurethane resin is dried in baking oven, when aqueous polyurethane coating enters baking oven, coating surface temperature can raise rapidly, easily causes surperficial conjunctiva and internal layer moistening state also, can not reach the object of finish-drying, make coating film surface light not, also even not.
On the other hand, the thermal source of aqueous polyurethane use for synthetic leather baking oven is mainly high power, high energy consumption electrothermal tube or boiler at present, and energy resource consumption is large, and the thermal efficiency is low.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven.
A kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, comprise baking oven, it is characterized in that being provided with microwave launcher above oven interior conveyer belt, on the top of baking oven, be provided with waste gas recovering device, in the left and right sides of baking oven, a microwave absorption chamber is set respectively.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that described microwave launcher has 5-10, and each microwave launcher top is provided with a corresponding waste gas recovering device.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that described microwave launcher has 6.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that being provided with baffle plate in the inside of baking oven.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that described baffle plate is arranged on 3/5 position of baking oven length direction.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that the setting that turns forward of described baffle plate.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, is characterized in that being coated with microwave reflection film on baking oven inwall, in baking oven outer wall and microwave absorption chamber interior walls, is coated with microwave absorption film.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, the capacity that it is characterized in that described waste gas recovering device is pre-large post-small, the capacity of 1 to 4 waste gas recovering device increases successively, the capacity of the 5th and the 6th waste gas recovering device is all less than the capacity of front 4 waste gas recovering devices, and the gross exhaust gas of waste gas recovering device is greater than the intake of the hot air heating apparatus air inlet of baking oven bottom.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, it is characterized in that described baking oven is provided with 6 power gears, its microwave power is respectively 100, 200, 400, 600, 700, 800W, microwave frequency is 900-3000Hz, while producing aqueous polyurethane synthetic leather, release liners surface layer is adopted to the 2-4 grade, middle level is adopted to the 3-5 grade, bottom is adopted to the 2-4 grade, 1 grade is for suitably reducing microwave power with the drying rate that slows down in oven for drying excessive velocities, regulation and control synthetic leather properties of product are stable, 6 grades is for suitably improving microwave power to accelerate drying rate when oven for drying speed is excessively slow, be under normal circumstances standby gear.
Described a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven, it is characterized in that described baking oven is divided into surface layer baking oven, middle level baking oven and bottom baking oven, the length of described surface layer baking oven is 25 meters, and the water vapour amount in control surface layer baking oven is at 18---275 m3/h; The length of middle level baking oven is 35 meters, and the water vapour amount in the baking oven of control middle level is at 59---964.5 m3/h; The length of bottom baking oven is 25 meters, and the water vapour amount in control bottom baking oven is at 36---248.4 m3/h.
The utility model provides a kind of energy-conserving and environment-protective, drying efficiency high aqueous polyurethane use for synthetic leather coating heated oven heating using microwave mechanism: conventionally, some dielectric materials are comprised of polar molecule and nonpolar molecule.Under the effect of microwave electromagnetic field, the polar molecule in medium transfers to and follows the alternation of microwave electromagnetic field and oriented from original warm-up movement state, intermolecularly will produce fierce friction.In this microprocess, microwave energy is converted into the heat in medium, makes medium temperature be rendered as the rising in macroscopic view.The utility model utilizes microwave drying technology to be combined aqueous polyurethane coating is dried to processing with air grid hot-air seasoning technology.The utility model microwave drying technology is to adopt microwave launcher to aqueous polyurethane coating launched microwave, and its microwave power is 100～800W, and microwave frequency is 900～3000HZ.The utility model microwave drying technology also comprises microwave absorbing device, thereby can avoid the leakage of microwave.The utility model microwave launcher is to aqueous polyurethane coating launched microwave, and the surface layer that will see through coating first carries out heating using microwave to coating internal layer, so coating will be dried successively from internal layer to skin.The utility model utilizes heating using microwave, and in waterborne polyurethane resin coating, the simple air grid heated oven of the volatile ratio of moisture significantly accelerates, and the thermal efficiency of baking oven significantly increases.
A kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven of the present utility model, energy-conserving and environment-protective, drying efficiency are high, heat in baking oven is stable, loss is low, effectively economize on resources, thereby reduce production costs, and, use the utility model also can greatly reduce the volatilization of organic solvent and poisonous and harmful impurity.
Accompanying drawing explanation
Fig. 1 is the structural representation of baking oven of the present utility model;
In figure, 1-microwave absorption chamber A; 2-microwave absorption chamber B; 3-painting platform position; 4-baking oven; 5-microwave launcher; 6-conveyer belt; 7-waste gas recovering device; 8-baffle plate; 9-hot air heating apparatus air inlet.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.
As shown in Figure 1, this aqueous polyurethane use for synthetic leather coating heating using microwave bake oven device of the present utility model, comprise two microwave absorption chambers, left and right, coating connecting gear, coating connecting gear is provided with baking oven 4 outward, baking oven 4 tops are provided with waste gas recovering device 7, and 6 microwave launchers 5 of this group are located at coating connecting gear top, and coating connecting gear below is provided with hot air heating apparatus air inlet 9.Microwave launcher 5 Fast Heating are carried out drying and processing to coating, and the wind that the hot air heating apparatus air inlet 9 of coating connecting gear below blows out plays the auxiliary effect drying up.The utility model can effectively reduce pollutant emission while using, by microwave launcher 5 heating, dryings, consume energy low, heat in baking oven is stable, loss is low, effectively economizes on resources, thereby reduces production costs, and, use the utility model also can greatly reduce the volatilization of organic solvent and poisonous and harmful impurity.The utility model is also provided with baffle plate 8 in oven interior in addition, baffle plate 8 is at about 3/5 place of baking oven, because heating in baking oven, polyurethane slurry can rise, and then be water vapour on top, whole baking oven chamber, can cause like this moisture in baking oven too much can make the unstable properties of the synthetic leather product produced.Nowadays equipment is placed baffle plate 8 as shown in the figure, its effect is exactly to tackle the water vapour of top, baking oven chamber and water vapour is discharged to baking oven 4 by waste gas recovering device as shown in the figure, water vapour can not moved to baking oven 4 rears again, greatly reduce the humidity of baking oven 4 back segments.
The exhaust air rate of 6 waste gas recovering devices 7, because water vapour evaporation is comparatively remarkable at the lower position of first four, so be designed to pre-large post-smallly, the discharge capacity of front four waste gas recovering devices is large, and especially the 4th waste gas recovering device capacity above baffle plate 8 should be maximum.In baking oven 4, the exhaust air rate of waste gas recovering device 7 should be greater than the intake of baking oven Base Heat air heating device air inlet 9; For example air output=the intake of surface layer baking oven+surface layer is discharged the amount of water vapour.
On baking oven 4 inwalls, be coated with microwave reflection film, it can reflect the indoor microwave of baking oven, microwave energy is accessed more fully and utilize, and improves the thermal efficiency of microwave; On the inwall of baking oven 4 outer walls and microwave absorption chamber A, B, be coated with microwave absorption film, the microwave being radiated outside baking oven 4 is all absorbed.
Heating using microwave baking oven is provided with 1-6 grades of power gears, its microwave power be respectively be 100,200,400,600,700,800W, microwave frequency is 900～3000HZ.
The resin-coated amount mean value of release liners upper layer is 5-18 silk, and material feeding amount mean value is 60-200g/m; The resin-coated amount mean value in middle level is 20-50 silk, and material feeding amount is 200-700g/m; Underfill resin layer mean value is 12-18 silk, and material feeding amount is 120-180g/m; Because the material feeding reason of three layers is different, so the applicable microwave power of surface layer is 2-4 shelves; The applicable power in middle level is 3-5 shelves; The applicable power of bottom is 2-4 shelves.
In addition, 1 grade be when baking oven 4 drying rates are too fast for suitably reducing microwave power with the drying rate that slows down, regulation and control synthetic leather properties of product are stable; 6 grades be when baking oven 4 drying rates are excessively slow for suitably improving microwave power to accelerate drying rate, be under normal circumstances standby gear.
Take solid content as 40% calculating, surface layer baking oven length is 25 meters, and surface layer material feeding amount is 60-200g/m, and in surface layer baking oven, the grammes per square metre of water is 900-3000g, because water vapour density 100 ℃ time is 600g/ m3, in 25 meters of baking ovens, instantaneous water vapour amount is about 1.5m3-5 m3.Because the conveyer belt speed of a motor vehicle is 5-23m/min(300-1380m/h), the synthetic leather that is equivalent to produce for a hour can pass through 12-55 25 meters of baking oven length, and the water vapour amount in hence one can see that 25 meters of baking ovens is 18-275 m3/h;
Take solid content as 40% calculating, middle level baking oven length is 35 meters, and material feeding amount in middle level is 200-700g/m, and in surface layer baking oven, the grammes per square metre of water is 4200-14700g, because water vapour density 100 ℃ time is about 600g/ m3, in 35 meters of baking ovens, instantaneous water vapour amount is 7m3-24.5 m3.Because the conveyer belt speed of a motor vehicle is 5-23m/min(300-1380m/h), the synthetic leather that is equivalent to produce for a hour can pass through 8.5-39.4 35 meters of baking oven length, and the water vapour amount in hence one can see that 35 meters of baking ovens is 59-964.5 m3/h;
Take solid content as 40% calculating, bottom baking oven length is 20 meters, and bottom material feeding amount is 120-180g/m, and in surface layer baking oven, the grammes per square metre of water is 1440-2160g, because water vapour density 100 ℃ time is about 600g/ m3, in 20 meters of baking ovens, instantaneous water vapour amount is 2.4m3--3.6 m3.Because the conveyer belt speed of a motor vehicle is 5-23m/min(300-1380m/h), the synthetic leather that is equivalent to produce for a hour can pass through 15-69 25 meters of baking oven length, and the water vapour amount in hence one can see that 25 meters of baking ovens is 36--248.4 m3/h.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within being all included in protection domain of the present utility model.
Claims (7)
1. an aqueous polyurethane use for synthetic leather is coated with heating using microwave baking oven, comprise baking oven (4), it is characterized in that being provided with microwave launcher (5) in the top of the inner conveyer belt of baking oven (4) (6), on the top of baking oven (4), be provided with waste gas recovering device (7), in the left and right sides of baking oven (4), a microwave absorption chamber be set respectively.
2. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 1, is characterized in that described microwave launcher (5) has 5-10, and each microwave launcher (5) top is provided with a corresponding waste gas recovering device (7).
3. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 2, is characterized in that described microwave launcher (5) has 6.
4. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 1, is characterized in that being provided with baffle plate (8) in the inside of baking oven (4).
5. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 4, is characterized in that described baffle plate (8) is arranged on 3/5 position of baking oven (4) length direction.
6. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 4, is characterized in that described baffle plate (8) setting that turns forward.
7. a kind of aqueous polyurethane use for synthetic leather coating heating using microwave baking oven as claimed in claim 1, is characterized in that being coated with microwave reflection film on baking oven (4) inwall, in baking oven (4) outer wall and microwave absorption chamber interior walls, is coated with microwave absorption film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320583416.1U CN203543295U (en) | 2013-09-22 | 2013-09-22 | Coating microwave heating oven for waterborne polyurethane synthetic leather |
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| CN201320583416.1U CN203543295U (en) | 2013-09-22 | 2013-09-22 | Coating microwave heating oven for waterborne polyurethane synthetic leather |
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| CN203543295U true CN203543295U (en) | 2014-04-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522730A (en) * | 2013-09-22 | 2014-01-22 | 浙江五洲实业有限公司 | Microwave heating oven for coating waterborne polyurethane synthetic leather and control method thereof |
| CN114850008A (en) * | 2022-06-08 | 2022-08-05 | 浙江嘉柯新材料科技有限公司 | Microwave drying device and process for synthetic leather waterborne polyurethane coating |
| WO2022188273A1 (en) * | 2021-03-09 | 2022-09-15 | 四川大学 | Microwave-hot air coupled drying process for water-based synthetic leather |
| CN115569824A (en) * | 2021-06-21 | 2023-01-06 | 四川大学 | Microwave drying device for leather coating |
-
2013
- 2013-09-22 CN CN201320583416.1U patent/CN203543295U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522730A (en) * | 2013-09-22 | 2014-01-22 | 浙江五洲实业有限公司 | Microwave heating oven for coating waterborne polyurethane synthetic leather and control method thereof |
| WO2022188273A1 (en) * | 2021-03-09 | 2022-09-15 | 四川大学 | Microwave-hot air coupled drying process for water-based synthetic leather |
| CN115569824A (en) * | 2021-06-21 | 2023-01-06 | 四川大学 | Microwave drying device for leather coating |
| CN114850008A (en) * | 2022-06-08 | 2022-08-05 | 浙江嘉柯新材料科技有限公司 | Microwave drying device and process for synthetic leather waterborne polyurethane coating |
| CN114850008B (en) * | 2022-06-08 | 2023-01-10 | 浙江嘉柯新材料科技有限公司 | Microwave drying device and process for synthetic leather waterborne polyurethane coating |
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Granted publication date: 20140416 |