CN103085429B - A kind of heat of film filtering material melts film covering device and heat melts film covering method - Google Patents
A kind of heat of film filtering material melts film covering device and heat melts film covering method Download PDFInfo
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- CN103085429B CN103085429B CN201310002135.7A CN201310002135A CN103085429B CN 103085429 B CN103085429 B CN 103085429B CN 201310002135 A CN201310002135 A CN 201310002135A CN 103085429 B CN103085429 B CN 103085429B
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Abstract
The heat that the invention discloses a kind of film filtering material melts film covering device and heat melts film covering method, high temperature hot-rolling, Compound rubber roller and chill roll is arranged successively from top to bottom by vertical direction, between high temperature hot-rolling and Compound rubber roller, establish slack adjuster, go out cloth side near a stripper roll at Compound rubber roller.When heat melts overlay film, poly tetrafluoroethylene and base material synchronously input between high temperature hot-rolling and Compound rubber roller, rolling after being peeled off by stripper roll after hot-forming.High temperature hot-rolling is identical with the roller footpath of chill roll, and its diameter is φ 360mm ~ φ 600mm, and Compound rubber roller is identical with the roller footpath of stripper roll, does is its diameter φ 150mm ~ φ 300? mm, the diameter of the two is than between 1.8 ~ 2.4.This overlay film equipment configuration is reasonable, Compound rubber roller good cooling results, and long service life, can reach 8 ~ 12 months, and Compound rubber roller repair and replacement are convenient.The polytetrafluoroethylene (PTFE) film filtering material adopting the present invention to produce ensure that the process based prediction model of poly tetrafluoroethylene, little to the damage of poly tetrafluoroethylene, and obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture, improves the filter efficiency of film filtering material.
Description
Technical field
The heat that the present invention relates to a kind of film filtering material melts film covering device and heat melts film covering method, be that one does not adopt adhesive and directly melts method by laminating for the poly tetrafluoroethylene filtering material substrate surface that arrives by heat, make manufacture method and the equipment configuration thereof of polytetrafluoroethylene (PTFE) film filtering material.
Background technology
Poly tetrafluoroethylene filtering material is that one provides strainability by poly tetrafluoroethylene, is provided the stratiform filtering material of mechanical performance by base material.Poly tetrafluoroethylene has multi-cellular structure; aperture is little, porosity is high; by the film filtering material of polytetrafluoroethylene (PTFE) film production; there is the features such as filter efficiency is high, running resistance is low, long service life; be the renewal product of high temperature fume dust removal filtering material, be widely used in China's basic industries environmental protection and the cleaner productions such as building materials, metallurgy, electric power and chemical industry.But adopt the polytetrafluoroethylene (PTFE) film filtering material that different production technologies makes, result of use is far from each other.
Name is called the Chinese patent CN1565713 of " filtering material of polytetrafluoroethylene (PTFE) (PTFE) composite membrane ", disclose the filtering material of a kind of polytetrafluoroethylene (PTFE) (PTFE) composite membrane, comprise glass fibre, polytetrafluoroethylene (PTFE), glass fibre is basement membrane, polytetrafluoroethylene (PTFE) is skin covering of the surface, by bonding agent by both compounds; Bonding agent is any one macromolecular compound in polysulfones, nylon N6, polyvinylidene fluoride.
Name is called the Chinese patent CN1331578C of " high temperature resistant P. T. F ", disclose a kind of high temperature resistant P. T. F, relate to the improvement to existing polytetrafluoroethylcomposite composite film filtering material, it comprises fiberglass substrate and ptfe surface film, it is characterized in that: first with post-treatment agent, impregnation process is carried out to fiberglass substrate, then carry out high temperature hot pressing with ptfe surface film.
Name is called the Chinese patent CN101279524 of " a kind of combination process of film filtering material and equipment ", discloses a kind of combination process and equipment of film filtering material.It is poly tetrafluoroethylene and fiberglass substrate are inputted composite equipment with the speed sync of 3m/min ~ 5m/min between warm-up mill and pressure roller, and tetrafluoroethylene inputs from the tangential direction of warm-up mill and lower compression roller, at the temperature of 260 DEG C ~ 360 DEG C, hot-forming with the linear pressure of 15kN/m ~ 30kN/m; Hot-forming film filtering material again after four/one side heating of warm-up mill, then with the linear pressure thermocompression forming of 15 ~ 20KN/m.
By film filtering material prepared by CN1565713, be adopt macromolecular compound by fiberglass substrate and ptfe surface film is gluing forms, be not suitable for Long-Time Service in high temperature environments.Because, when using in the environment more than 190 DEG C, adhesive just starts fusing, and the compound firmness thus between the base material of coated filter material and skin covering of the surface reduces, poly tetrafluoroethylene easily comes off from base material, meanwhile, the adhesive after fusing can ooze out from the micropore of film, and the glue oozed out causes a large amount of dusts to be bonded on the surface of filtrate, be difficult to remove, and can be more poly-more, cause a large amount of dust to be bonded at filter bag substrate surface, and very fast filter bag is blocked and make it lose filter efficacy.
By film filtering material prepared by CN1331578C and CN101279524, poly tetrafluoroethylene and fiberglass substrate can be realized glue-free hot pressing compound by its process, solve compound firmness and to reduce and adhesive such as to ooze out at the problem from the micropore of film.But in long high-temperature molding process, ptfe surface film causes damage, its aperture becomes large, and filter efficiency declines.Meanwhile, its Compound rubber roller Long Term Contact high temperature, cooling effect is poor, and surface temperature is high, only 3 to 6 months service life, and its roller Heavy Weight, change and bother very much.
Summary of the invention
In order to overcome the deficiencies in the prior art part, for above-mentioned Problems existing, the heat that the present invention proposes a kind of film filtering material melts film covering device and heat melts film covering method, adopts polytetrafluoroethylene (PTFE) film filtering material prepared by manufacture method of the present invention, little to the damage of poly tetrafluoroethylene, obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture, and filter efficiency is high, simultaneously, adopt equipment configuration of the present invention, its Compound rubber roller good cooling results, long service life, and repair and replacement are convenient.
The technology used in the present invention solution is as follows:
The heat of film filtering material melts a film covering device, arranges high temperature hot-rolling, Compound rubber roller and chill roll successively from top to bottom, establish slack adjuster, go out cloth side near a stripper roll at Compound rubber roller between high temperature hot-rolling and Compound rubber roller by vertical direction.
Described high temperature hot-rolling is identical with the roller footpath of chill roll, and its diameter is φ 360mm ~ φ 600mm, and Compound rubber roller is identical with the roller footpath of stripper roll, and its diameter is φ 150mm ~ φ 300mm, and the diameter of the two is than between 1.8 ~ 2.4.
High temperature hot-rolling is stationary roll, and Compound rubber roller and chill roll are action roller, is controlled by oil cylinder or cylinder, can linearly guide rail or the upper and lower gliding motility of dovetail guiding mechanism.
A kind of method utilizing described device heat to melt overlay film, when heat melts overlay film, first poly tetrafluoroethylene and base material are synchronously inputted between high temperature hot-rolling and Compound rubber roller, rolling after being peeled off by stripper roll after hot-forming, when heat melts overlay film, poly tetrafluoroethylene and base material are linear contact lay, overlay film linear pressure is 6KN/m ~ 15KN/m, and temperature is 375 DEG C ~ 410 DEG C, and linear velocity is 5m/min ~ 8m/min.
Overlay film gap between described high temperature hot-rolling and Compound rubber roller, can within the scope of 0 ~ 5.00mm free adjustment.
Described high temperature hot-rolling is initiatively traction, hauling speed as the main speed of whole unit, Compound rubber roller and chill roll passive transport.
Described Compound rubber roller and chill roll all assemble swivel joint, interior logical cooling water.
When heat of the present invention melts overlay film, poly tetrafluoroethylene and base material are linear contact lay, poly tetrafluoroethylene (contact high temperature hot-rolling) upper, base material (contact Compound rubber roller) under, between the two synchronous input high temperature hot-rolling and Compound rubber roller, overlay film gap is set as 0 ~ 5.00mm, overlay film linear pressure is 6KN/m ~ 15KN/m, and high-temperature hot roll temperature is 375 DEG C ~ 410 DEG C, and linear velocity is 5m/min ~ 8m/min.
The diameter of high temperature hot-rolling and chill roll is φ 360mm ~ φ 600mm, and Compound rubber roller diameter is φ 150mm ~ φ 300mm, and the diameter of the two is than between 1.8 ~ 2.4.The diameter of high temperature hot-rolling and chill roll is comparatively thick and diameter is identical, is because film covering device can be made to bear higher pressure like this and can keep three roller total pressure balances, the not easily flexural deformation of each roller.Because Compound rubber roller is when contacting with high temperature hot-rolling, surface temperature is high, the easy aged deterioration of roll surface rubber, needs periodic replacement.So be equipped with swivel joint in Compound rubber roller end on the one hand in the present invention, interior logical cooling water, from internal cooling, is also equipped with a chill roll from surface cool on the other hand.Meanwhile, because its roller footpath is comparatively thin, then its rotating speed is faster, can with chill roll contact frequently, reach better surface cool effect, thus extend its service life, reach 8 ~ 12 months.In addition, because its roller footpath is comparatively thin, weight is lighter, makes in replacing.
For the arrangement of high temperature hot-rolling, Compound rubber roller and chill roll, present invention employs the technical scheme of three roll shaft cores at straight line: high temperature hot-rolling is active carry-over pinch rolls, its position is fixed, and vertically arrange Compound rubber roller and chill roll successively under it.Compound rubber roller and chill roll are controlled by oil cylinder or cylinder, can linearly guide rail or the upper and lower gliding motility of dovetail guiding mechanism, during work under the effect of oil cylinder or cylinder pressure, Compound rubber roller and chill roll are by upwards jack-up, contact tectorial backing material, thus moved and passive transport by the high-temperature hot roller strap of active transport.
Between high temperature hot-rolling and Compound rubber roller, establish slack adjuster, be to allow filtering material base material in coating process not by undue compacting.As everyone knows, when the Nomex of filtering material particularly heatmeltable is by high temperature roll-in, seriously can hardens, thus can lose or lose its permeability, can not use as filtering material.And the essence that heat melts overlay film is, adopt special equipment configuration, poly tetrafluoroethylene and substrate surface are merged, and does not affect base material overall performance, so overlay film gap must be set.Slack adjuster of the present invention, can in the scope of 0 ~ 5.00mm, free adjustment overlay film gap.
Compound rubber roller goes out cloth side near a film filtering material stripper roll identical with Compound rubber roller diameter, is in order to after film filtering material heat melts processing, allows it hightail high temperature hot-rolling.As everyone knows, although poly tetrafluoroethylene is a kind of acid-fast alkali-proof, and be insoluble to the inert material of most of organic solvent, but its processing temperature narrow range, temperature is low there is not thermokarst phenomenon, and it is oversize that the too high or heat of temperature melts the time, and larger change will occur for its physics and chemical property, particularly its aperture can become large, affects filter effect.After adopting film filtering material stripper roll, poly tetrafluoroethylene and base material is made to melt after overlay film through high-temperature hot, hightail high temperature hot-rolling, realize the linear contact lay of poly tetrafluoroethylene and base material compound, the process based prediction model of poly tetrafluoroethylene can be ensured, little to the damage of poly tetrafluoroethylene, obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture, thus improves the filter efficiency of film filtering material.
The poly tetrafluoroethylene that the present invention adopts, micro-pore diameter is about 0.05 ~ 2.50 micron, with the film filtering material that it adopts technology and device of the present invention to make, the damage of poly tetrafluoroethylene is little, obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture, 100% collection can be accomplished for the dust of more than 1 micron, reach good dust removing effects.
The base material that the present invention adopts can be the fibers mixture Nomex etc. of glass fabric, basalt fiber cloth, fiberglass needled mat, basalt fibre Nomex, polytetrafluoroethylpunched punched felt or these kinds.
Beneficial effect of the present invention is: have employed advanced process route and equipment, achieve glue-free heat and melt overlay film, and the polytetrafluoroethylene (PTFE) film filtering material produced ensure that the process based prediction model of poly tetrafluoroethylene, little to the damage of poly tetrafluoroethylene, obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture, thus improves the filter efficiency of film filtering material.Meanwhile, overlay film equipment configuration is reasonable, Compound rubber roller good cooling results, long service life, and Compound rubber roller repair and replacement are convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of film filtering material film covering device of the present invention.
In figure: 1 is high temperature hot-rolling, 2 is Compound rubber roller, and 3 is stripper roll, and 4 is film filtering material finished product, and 5 is chill roll, and 6 is film guiding roller, and 7 is poly tetrafluoroethylene, and 8 is base material, and 9 is fabric guide roll, and 10 is frame.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment one: poly tetrafluoroethylene and glass fabric heat melt overlay film.
The overlay film manufacture method of film filtering material is: first the temperature of high temperature hot-rolling 1 is raised to 410 DEG C, by commercially available for poly tetrafluoroethylene 7(, specification FM10) and glass fabric 8(commercially available, specification EWTF750) respectively through film guiding roller 6 and fabric guide roll 9, synchronously inputting heat with the linear velocity of 6m/min melts between the high temperature hot-rolling 1 of film covering device and Compound rubber roller 2, poly tetrafluoroethylene 7 and glass fabric 8 heat under the linear pressure of the temperature of 410 DEG C and 15KN/m melts compound, hightails high temperature hot-rolling 1 and obtains glass fabric cover polytetrafluoroethylene (PTFE) film filtering material 4 through stripper roll 3.
A kind of heat of film filtering material melts film covering device, comprise high temperature hot-rolling 1, Compound rubber roller 2, stripper roll 3, chill roll 5, film guiding roller 6, fabric guide roll 9 and frame 10, successively high temperature hot-rolling 1, Compound rubber roller 2 and chill roll 5 are loaded in frame 10 from top to bottom by vertical direction, vertical precision is controlled by line slideway, make three roll shaft cores on a vertical straight line, wherein the diameter of high temperature hot-rolling 1 and chill roll 5 is φ 600mm, the diameter of Compound rubber roller 2 and stripper roll 3 is φ 300mm, and the diameter of high temperature hot-rolling 1 and Compound rubber roller 2 is than being 2:1.High temperature hot-rolling 1 position is fixed, and Compound rubber roller 2 and chill roll 5 can the linearly upper and lower gliding motilities of guide rail.High temperature hot-rolling 1 is initiatively traction, hauling speed is as the main speed of whole unit, running speed design is adjustable between 0 ~ 8m/min, Compound rubber roller 2 by with high temperature hot-rolling 1(and poly tetrafluoroethylene 7 and glass fabric 8) contact that producing rubs drives and passive transport, by contacting with Compound rubber roller 2, producing rubs drives and passive transport chill roll 5, between high temperature hot-rolling 1 and Compound rubber roller 2, establish slack adjuster, make overlay film gap adjustable between 0 ~ 5.00mm.In the front side of Compound rubber roller 2, successively film guiding roller 6 and fabric guide roll 9 are loaded in frame 10 by arranging up and down.At the rear side of Compound rubber roller 2, position stripper roll 3 being parallel to Compound rubber roller 2 is loaded in frame 10.Swivel joint is equipped with, interior logical cooling water in the end of Compound rubber roller 2, stripper roll 3 and chill roll 5.
Film filtering material obtained by the present embodiment is consistent with used polytetrafluoroethylene (PTFE) membrane aperture.
Embodiment two: poly tetrafluoroethylene and polytetrafluoroethylene (PTFE) Nomex heat melt overlay film.
The overlay film manufacture method of film filtering material is: first the temperature of high temperature hot-rolling 1 is raised to 375 DEG C, by commercially available for poly tetrafluoroethylene 7(, specification FM10) and polytetrafluoroethylene (PTFE) Nomex 8(commercially available, specification PTFENW700) respectively through film guiding roller 6 and fabric guide roll 9, synchronously inputting heat with the linear velocity of 8m/min melts between the high temperature hot-rolling 1 of film covering device and Compound rubber roller 2, poly tetrafluoroethylene 7 and polytetrafluoroethylene (PTFE) Nomex 8 heat under the linear pressure of the temperature of 375 DEG C and 6KN/m melts compound, hightail high temperature hot-rolling 1 through stripper roll 3 and obtain polytetrafluoroethylene (PTFE) Nomex and cover polytetrafluoroethylene (PTFE) film filtering material 4.
The heat of film filtering material melts a film covering device, comprises high temperature hot-rolling 1, Compound rubber roller 2, stripper roll 3, chill roll 5, film guiding roller 6, fabric guide roll 9 and frame 10.Successively high temperature hot-rolling 1, Compound rubber roller 2 and chill roll 5 are loaded in frame 10 from top to bottom by vertical direction, vertical precision is controlled by dovetail guiding mechanism, make three roll shaft cores on a vertical straight line, wherein the diameter of high temperature hot-rolling 1 and chill roll 5 is φ 360mm, the diameter of Compound rubber roller 2 and stripper roll 3 is φ 150mm, and the diameter of high temperature hot-rolling 1 and Compound rubber roller 2 is than being 2.4:1.High temperature hot-rolling 1 position is fixed, and Compound rubber roller 2 and chill roll 5 can along the upper and lower gliding motilities of dovetail guiding mechanism.All the other are with embodiment one.
Film filtering material obtained by the present embodiment is consistent with used polytetrafluoroethylene (PTFE) membrane aperture.
Embodiment three: poly tetrafluoroethylene and fiberglass needled mat heat melt overlay film.
The overlay film manufacture method of film filtering material is: first the temperature of high temperature hot-rolling 1 is raised to 390 DEG C, by commercially available for poly tetrafluoroethylene 7(, specification FM10) and fiberglass needled mat 8(commercially available, specification GENW800) respectively through film guiding roller 6 and fabric guide roll 9, synchronously inputting heat with the linear velocity of 7m/min melts between the high temperature hot-rolling 1 of film covering device and Compound rubber roller 2, poly tetrafluoroethylene 7 and fiberglass needled mat 8 heat under the linear pressure of the temperature of 390 DEG C and 10KN/m melts compound, hightail high temperature hot-rolling 1 through stripper roll 3 and obtain fiberglass needled mat and cover polytetrafluoroethylene (PTFE) film filtering material 4.
A kind of heat of film filtering material melts film covering device: comprise high temperature hot-rolling 1, Compound rubber roller 2, stripper roll 3, chill roll 5, film guiding roller 6, fabric guide roll 9 and frame 10.Successively high temperature hot-rolling 1, Compound rubber roller 2 and chill roll 5 are loaded in frame 10 from top to bottom by vertical direction, vertical precision is controlled by line slideway, make three roll shaft cores on a vertical straight line, wherein the diameter of high temperature hot-rolling 1 and chill roll 5 is φ 360mm, the diameter of Compound rubber roller 2 and stripper roll 3 is φ 200mm, and the diameter of high temperature hot-rolling 1 and Compound rubber roller 2 is than being 1.8:1.High temperature hot-rolling 1 position is fixed, and Compound rubber roller 2 and chill roll 5 can the linearly upper and lower gliding motilities of guide rail.All the other are with embodiment one.
Film filtering material obtained by the present embodiment is consistent with used polytetrafluoroethylene (PTFE) membrane aperture.
Comparative example: poly tetrafluoroethylene and glass fabric heat melt overlay film.
Be called combination process and the equipment of a kind of film filtering material disclosed by Chinese patent CN101279524 of " a kind of combination process of film filtering material and equipment " according to name, wherein the roller footpath of warm-up mill, lower compression roller and side pressure roller is φ 400mm.Between the warm-up mill that poly tetrafluoroethylene (commercially available, specification FM10) and glass fabric (commercially available, specification EWTF750) are inputted composite equipment with the speed sync of 4m/min and lower compression roller, at the temperature of 350 DEG C, hot-forming with the linear pressure of 25kN/m; Hot-forming film filtering material again after four/one side heating of warm-up mill, then with the linear pressure thermocompression forming of 18KN/m.
The aperture of the film filtering material obtained by this comparative example increases 1 times than the aperture of the poly tetrafluoroethylene used.
Comparative example and comparative example (see table 1), the polytetrafluoroethylene (PTFE) film filtering material adopting the present invention to produce ensure that the process based prediction model of poly tetrafluoroethylene, it is little that heat melts the damage of overlay film to poly tetrafluoroethylene, and obtained film filtering material is consistent with used polytetrafluoroethylene (PTFE) membrane aperture.And the aperture of film filtering material obtained by comparative example increases 1 times than the aperture of the poly tetrafluoroethylene used, filter efficiency declines.
Table 1 embodiment and comparative example parameter comparison
Claims (6)
1. the method utilizing heat that the heat of film filtering material melts film covering device to melt overlay film, it is characterized in that: the heat of this film filtering material melts film covering device, high temperature hot-rolling, Compound rubber roller and chill roll is arranged successively from top to bottom by vertical direction, between high temperature hot-rolling and Compound rubber roller, establish slack adjuster, go out cloth side near a stripper roll at Compound rubber roller; When heat melts overlay film, first poly tetrafluoroethylene and base material are synchronously inputted between high temperature hot-rolling and Compound rubber roller, rolling after being peeled off by stripper roll after hot-forming, when heat melts overlay film, poly tetrafluoroethylene and base material are linear contact lay, overlay film linear pressure is 6KN/m ~ 15KN/m, temperature is 375 DEG C ~ 410 DEG C, and linear velocity is 5m/min ~ 8m/min.
2. method according to claim 1, it is characterized in that: described high temperature hot-rolling is identical with the roller footpath of chill roll, its diameter is φ 360mm ~ φ 600mm, and Compound rubber roller is identical with the roller footpath of stripper roll, its diameter is φ 150mm ~ φ 300mm, and the diameter of the two is than between 1.8 ~ 2.4.
3. method according to claim 1, is characterized in that: high temperature hot-rolling is stationary roll, and Compound rubber roller and chill roll are action roller, is controlled by oil cylinder or cylinder, can linearly guide rail or the upper and lower gliding motility of dovetail guiding mechanism.
4. method according to claim 1, is characterized in that: the overlay film gap between described high temperature hot-rolling and Compound rubber roller, can within the scope of 0 ~ 5.00mm free adjustment.
5. method according to claim 1, is characterized in that: described high temperature hot-rolling is initiatively traction, hauling speed as the main speed of whole unit, Compound rubber roller and chill roll passive transport.
6. method according to claim 1, is characterized in that: described Compound rubber roller and chill roll all assemble swivel joint, interior logical cooling water.
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| CN201310002135.7A CN103085429B (en) | 2013-01-05 | 2013-01-05 | A kind of heat of film filtering material melts film covering device and heat melts film covering method |
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| CN201310002135.7A CN103085429B (en) | 2013-01-05 | 2013-01-05 | A kind of heat of film filtering material melts film covering device and heat melts film covering method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103977634B (en) * | 2014-05-03 | 2015-11-25 | 胡齐放 | A kind of process units of coated filter material |
| CN106042590A (en) * | 2016-07-21 | 2016-10-26 | 上海市凌桥环保设备厂有限公司 | High-temperature composite machine with high temperature compensation function |
| CN107825809A (en) * | 2017-11-30 | 2018-03-23 | 厦门三维丝环保股份有限公司 | The hot pressing film covering device and its processing technology of a kind of stiffening filtrate |
| CN108819426A (en) * | 2018-07-05 | 2018-11-16 | 爱美克空气过滤器（苏州）有限公司 | A kind of polytetrafluoroethylfilter filter material set composite and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279524A (en) * | 2008-04-25 | 2008-10-08 | 江苏闳业机械有限公司 | Compound technique of film filtering material and equipment |
| GB2468356A (en) * | 2009-03-06 | 2010-09-08 | Charles Gardiner | Lamination machine |
| CN203063238U (en) * | 2013-01-05 | 2013-07-17 | 安徽锦鸿环保科技有限公司 | Hot melt film covering device of film filter material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279524A (en) * | 2008-04-25 | 2008-10-08 | 江苏闳业机械有限公司 | Compound technique of film filtering material and equipment |
| GB2468356A (en) * | 2009-03-06 | 2010-09-08 | Charles Gardiner | Lamination machine |
| CN203063238U (en) * | 2013-01-05 | 2013-07-17 | 安徽锦鸿环保科技有限公司 | Hot melt film covering device of film filter material |
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