CN104029449A - Coating film with large moisture permeability - Google Patents
Coating film with large moisture permeability Download PDFInfo
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- CN104029449A CN104029449A CN201410245980.1A CN201410245980A CN104029449A CN 104029449 A CN104029449 A CN 104029449A CN 201410245980 A CN201410245980 A CN 201410245980A CN 104029449 A CN104029449 A CN 104029449A
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- coating
- transfer rate
- coated film
- vapor transfer
- core buffer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a coating film with the large moisture permeability. The coating film comprises a basic film layer and a coating layer, wherein the basic film layer is an expanded polytetrafluoroethylene film layer; the coating layer coating the expanded polytetrafluoroethylene film layer is a polyurethane emulsion copolymerization coating layer containing superfine micro-powder of hemp stalk cores; a coating agent of the polyurethane emulsion copolymerization coating layer containing the superfine micro-powder of the hemp stalk cores is prepared by uniformly stirring the following raw materials in percentage by weight: 20-25% of polyurethane; 55-60% of a dimethylfomamide solvent; 2-5% of a hydrophilic group solvent and 18-25% of the superfine micro-powder of the hemp stalk cores. Through the manner, the coating film has good moisture absorbing and guide performances; the content of moisture permeable factor fibrin in the superfine micro-powder of the hemp stalk cores is large; micro-grooves and micropores exist in the coasting film, so that the moisture absorption area and the diffusion area are increased; the coating film has excellent performances such as ultraviolet resistance, water proofing, dust proofing, oil proofing, moisture permeability and corrosion resistance on oxide solutions.
Description
Technical field
The present invention relates to a kind of large vapor transfer rate coated film.
Background technology
In prior art, the loose mist of bend pipe air-vent of European Union's automobile lamp goes condensation theoretical, inside there is sponge dustproof, also connecing air in lamp can go out greatly greatly with the variation of temperature in lamp, thereby realize faster loose mist in lamp and remove condensation, the car light that bend pipe is ventilative uses the interior laying dust of housing and electrical equipment corrosion in the near future.
The loose mist of U.S. Gore company goes condensation theoretical: car light be by lamp with lamp ventilative convection current outward, set up a kind of air pressure balance, in lamp, steam raises and discharges outside lamp with the temperature in lamp, and the ventilated membrane pasting method that on housing, usable floor area is larger is realized loose mist and removed condensation.Thereby reduce steam, the ambiguous phenomenon of lamp scattering of light is occurred, when car light is not worked, external environment condition humid air can not enter in housing.
The loose mist of Dong electrician company goes condensation theoretical: car light is the upper-lower position air-vent formation cross-ventilation by light fixture, and in lamp, steam raises and discharges outside lamp from the air-vent of upper position with the temperature in lamp, and the air-vent of upper/lower positions constantly supplements lamp outer air.Thereby reduce steam, the ambiguous phenomenon of lamp scattering of light is occurred, the ventilation plug quantity that this theory is used is many, cannot solve the condensation problem of air themperature lower region in housing.
Summary of the invention
It is high that the technical problem that the present invention mainly solves is to provide a kind of water imbibition, and poisture-penetrability is good, the large vapor transfer rate coated film that ventilating capability is strong.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of large vapor transfer rate coated film is provided, it is characterized in that, comprise: basic rete and coating, described basic rete is eptfe membrane layer, and the coating being coated on described eptfe membrane layer is the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine;
The coating agent of the described ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine comprises that the raw material uniform stirring of following weight percentage makes:
Polyurethanes 20%-25%;
Solvent dimethylformamide 55%-60%;
Hydrophilic radical solvent 2%-5%;
Chinese Kenaf Core Buffer super fine 18%-25%.
In a preferred embodiment of the present invention, the thickness of the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine is 0.012mm-0.025mm.
In a preferred embodiment of the present invention, the viscosity index (VI) of described coating agent is 33 Pa.s.
In a preferred embodiment of the present invention, in described coating agent, comprise the nonvolatile matter of 35%-45%.
In a preferred embodiment of the present invention, the manufacture craft of described Chinese Kenaf Core Buffer super fine comprises: first Chinese Kenaf Core Buffer is processed as to meal, and carry out pretreatment, carry out successively again thinning processing and activation processing, after finishing dealing with, dry, then carry out modification, then carry out miniaturization processing, finally carry out separating treatment, make Chinese Kenaf Core Buffer super fine.
In a preferred embodiment of the present invention, modification is to add methyl diphenylene diisocyanate and polyalcohol polymeric modification in the Chinese Kenaf Core Buffer of pulverizing after drying.
In a preferred embodiment of the present invention, the preparation technology of this large vapor transfer rate coated film comprises the following steps:
A) coating agent is fed in raw material, and regulate gluing thickness;
B) unreel eptfe membrane layer, and contact gluing with coating agent, on eptfe membrane layer surface, form the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine;
C) the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine is carried out to heating, drying;
D) maturation is solidified, and makes large vapor transfer rate coated film.
In a preferred embodiment of the present invention, in step a), gluing thickness is 0.012mm-0.025mm.
In a preferred embodiment of the present invention, in step c), the temperature of heating, drying is 80 ℃-100 ℃.
In a preferred embodiment of the present invention, in step d), it is to deposit at least 24h under temperature is the environment of 20 ℃-40 ℃ that maturation is solidified.
The invention has the beneficial effects as follows: the large vapor transfer rate coated film of the present invention has good moisture absorption performance, the thoroughly wet factor content of cellulose that contains Chinese Kenaf Core Buffer super fine is large, there is a large amount of hydroxyls to make itself and water molecules group many, there is micro-groove and micropore simultaneously, increased moisture absorption area and diffusion area; There is excellent uvioresistant performance, met the performance of automobile lamp and other small-sized sophisticated electronics (mobile phone, navigation terminal, microcomputer etc.) dependable performance completely, in waterproof and dustproof, grease proofing, the comprehensive requirement of protection such as wet, anti-oxidant solution corrosion thoroughly.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also according to these accompanying drawings, obtain other accompanying drawing, wherein:
Fig. 1 is the structural representation of large vapor transfer rate coated film one preferred embodiment of the present invention;
In accompanying drawing, the mark of each parts is as follows: 1, eptfe membrane layer, 2, the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine.
The specific embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of large vapor transfer rate coated film, comprise: basic rete and coating, described basic rete is eptfe membrane layer 1, and the coating being coated on described eptfe membrane layer 1 is the ester emulsion copolymerized coating 2 of polyurethane that contains Chinese Kenaf Core Buffer super fine.
Embodiment 1:
The coating agent of the ester emulsion copolymerized coating 2 of polyurethane that contains Chinese Kenaf Core Buffer super fine comprises that the raw material uniform stirring of following weight percentage makes:
Polyurethanes 20%;
Solvent dimethylformamide 55%;
Hydrophilic radical solvent 2%;
Chinese Kenaf Core Buffer super fine 18%.
The thickness of the ester emulsion copolymerized coating 2 of polyurethane that wherein, contains Chinese Kenaf Core Buffer super fine is 0.012mm.
The viscosity index (VI) of coating agent is 33 Pa.s.In coating agent, comprise 35% nonvolatile matter.
Embodiment 2:
The coating agent of the ester emulsion copolymerized coating 2 of polyurethane that contains Chinese Kenaf Core Buffer super fine comprises that the raw material uniform stirring of following weight percentage makes:
Polyurethanes 23%;
Solvent dimethylformamide 57%;
Hydrophilic radical solvent 4%;
Chinese Kenaf Core Buffer super fine 21%.
The thickness of the ester emulsion copolymerized coating 2 of polyurethane that wherein, contains Chinese Kenaf Core Buffer super fine is 0.0185mm.
The viscosity index (VI) of coating agent is 33 Pa.s.In coating agent, comprise 40% nonvolatile matter.
Embodiment 3:
The coating agent of the ester emulsion copolymerized coating 2 of polyurethane that contains Chinese Kenaf Core Buffer super fine comprises that the raw material uniform stirring of following weight percentage makes:
Polyurethanes 25%;
Solvent dimethylformamide 60%;
Hydrophilic radical solvent 5%;
Chinese Kenaf Core Buffer super fine 25%.
The thickness of the ester emulsion copolymerized coating 2 of polyurethane that wherein, contains Chinese Kenaf Core Buffer super fine is 0.025mm.
The viscosity index (VI) of coating agent is 33 Pa.s.In coating agent, comprise 45% nonvolatile matter.
In embodiment 1-3, the manufacture craft of Chinese Kenaf Core Buffer super fine comprises: first Chinese Kenaf Core Buffer is processed as to meal, and carry out pretreatment, carry out successively again thinning processing and activation processing, after finishing dealing with, dry, then carry out modification, then carry out miniaturization processing, finally carry out separating treatment, make Chinese Kenaf Core Buffer super fine.
Modification is in the Chinese Kenaf Core Buffer of pulverizing after drying, to add a certain amount of methyl diphenylene diisocyanate and a small amount of polyalcohol to realize polymeric modification.
The polyurethanes emulsion that the present invention adopts, contain Chinese Kenaf Core Buffer super fine, the macromolecular compound of contain in polyurethane ester molecular structure-NHCOO-unit, its cardinal principle is on polymer chain, to introduce appropriate hydrophilic radical, and spontaneous dispersion under certain condition forms emulsion, in the large molecule of PU, contains a large amount of polar groups, molecular separating force is very strong, cause it to have good film forming, can on fabric, form tough and tensile and durable film, it also has certain poisture-penetrability.
Its reason is: polar group or hydrophilic radical in one side PU, as-OH ,-NHCOO-,-COOH, " chemical ladder stone " effect of Chinese Kenaf Core Buffer superfine powder etc., makes water vapour molecule along ladder from high humility one side, move to low humidity one side; Theoretically, on macromolecular chain, mainly contain hydrophilic radical, and as long as hydrophilic radical content and arrangement are suitable, they just can with hydrone effect, by hydrogen bond and other intermolecular force, after high humility one side draught attached water part, by hydrophilic radical on macromolecular chain, be delivered to low humidity one side desorb.Therefore, thoroughly wet is in fact the process of " absorption one diffusion-transfer-desorb ".Hydrophilic radical is referred to as " chemical ladder stone ", in the situation that there is pressure differential, moisture content by a side positioning to opposite side, shift.This process is wet process thoroughly namely.
In polyurethanes emulsion glaze, add 18 ~ 25% Chinese Kenaf Core Buffer super fine, the Chinese Kenaf Core Buffer super fine adding has 0.5 ~ 0.2 a large amount of μ m micropore and cracks, and contains more hydrophilic active group, forms copolymerization coating adhesive; The thoroughly wet factor content of cellulose that contains Chinese Kenaf Core Buffer super fine is large, has a large amount of hydroxyls to make itself and water molecules group many, has micro-groove and micropore simultaneously, has increased moisture absorption area and diffusion area.Compare with conventional PU coating, the water absorption rate of the copolymerization coating adhesive that contains Chinese Kenaf Core Buffer super fine has improved 10% left and right, water vapour permeability has improved 1 ~ 5 times, greatly improved automobile lamp by inside to outside ventilating capability, make car light inside continue to keep very low humidity and occur without knot mist condensation phenomenon, thus the harmful effect of elimination car light interior focusing photograph; The copolymerization coating adhesive that contains Chinese Kenaf Core Buffer super fine, after graft copolymerization, molecule rearranges and becomes and intersect firmly Space Idea, and surface is also finer and close, stable, evenly.Improved the performance such as the water pressure resistance intensity of the coated film of large vapor transfer rate, light aging resisting, heat ageing for automobile lamp.
Wherein, the manufacturing process of eptfe membrane layer 1 comprises;
1) by polytetrafluoroethyldispersion dispersion resin and liquid extrusion aid in proportion (5:1) mix (can add coloring agent therein, meet the multifarious demand of film color);
2) 30 ℃ of-35 ℃ of maturations of insulation, give and are pressed into cylinder blank;
3) by rolling process, cylinder blank is laminated;
4) through heating 100 ℃ of left and right, slough extrusion aid;
5) simple tension, draft temperature is 200 ℃ of left and right, then biaxial tension, and draft temperature is 200 ℃ of left and right;
6) thermal finalization, the temperature sintering 18min 340 ℃ of left and right;
7) last, cooling, rolling, makes expanded PTFE microporous membrane.
The microporous membrane material of expanded PTFE (ePTFE) is called for short " ePTFE film ", and " ePTFE " is the literary sketch of expanded PTFE English word (expanded polytetrafluorethylene); The microporous membrane of expanded PTFE (ePTFE) is a kind of macromolecule new material film with specific function high added value, through special process, through biaxial tension, make, the microfibre of this film has formed the inside and outside micropore in 0.1 penetrating μ m aperture, μ m ~ 18, is the ventilated membrane of real meaning.Film surface can reach tens micropores per square inch, each micro-pore diameter is less than the minimum of a value (20 μ m-100 μ m) of the mist globule, and much larger than water vapour molecule diameter (0.0003 μ m-0.0004 μ m), can make steam pass through and water droplet can not pass through greatly because of surperficial tension, utilize this microcellular structure can reach outstanding Waterproof Breathable function; In addition because the tiny and longitudinal substandard bend alignment of this hole extreme, be used in auto electric (car light) electronic equipment protection aspect, though can make the air in auto electric (car light) electronic equipment regulate pressure balance by this film convection current, reach free of contamination dirt close, but the steam that cannot stop or reduce in environment enters in housing, be trapped in the too high performance that will have a strong impact on the performance of auto electric (car light) electronic equipment of wetness in housing when automobile is stopped.
Therefore, the ester emulsion copolymerized coating 2 of polyurethane that the present invention contains Chinese Kenaf Core Buffer super fine in the side surface roller coating at eptfe membrane layer 1, makes large vapor transfer rate coated film.
The preparation technology of this large vapor transfer rate coated film comprises the following steps:
A) coating agent is fed in raw material, and to regulate gluing thickness be 0.012mm-0.025mm;
B) unreel eptfe membrane layer 1, and contact gluing with coating agent, on eptfe membrane layer 1 surface, form the ester emulsion copolymerized coating 2 of polyurethane that contains Chinese Kenaf Core Buffer super fine;
C) the ester emulsion copolymerized coating 2 of the polyurethane that contains Chinese Kenaf Core Buffer super fine is carried out to heating, drying, the temperature of heating, drying is 80 ℃-100 ℃, and effect is that solvent dimethylformamide is removed in volatilization and solvent recovery is processed;
D) under temperature is the environment of 20 ℃-40 ℃, deposit at least 24h maturation and solidify, make large vapor transfer rate coated film.
Wherein, coating contains hydrophilic radical and hydrone effect, by hydrogen bond and other intermolecular force, after high humility one side draught attached water part, by hydrophilic radical on macromolecular chain, is delivered to low humidity one side desorb.Therefore, thoroughly wet be in fact one at hydrophilic radical polyurethanes coating surface " absorption " stream molecule---hydrone in hydrophilic radical polyurethanes coating laterally " diffusion "---on hydrone combination interface face at hydrophilic radical polyurethanes coating and eptfe membrane " desorb "---hydrone enters the densely covered micropore of eptfe membrane and discharges moisture to external environment condition " process.Hydrophilic radical is referred to as " chemical ladder stone ", in the situation that there is pressure differential, moisture content by a side positioning to opposite side, shift.This process is wet process thoroughly namely.
Through lot of experiments, find that the vapor transfer rate that steam is discharged from coated side to eptfe membrane side is greater than the vapor transfer rate that steam is discharged from eptfe membrane side direction coated side, the difference of two thoroughly wet directions causes the difference of vapor transfer rate, from coated side to passing through inside amount wet than vapor transfer rate 30 ~ 50% left and right in eptfe membrane side direction housing, utilize the greatest differences of the vapor transfer rate of this both direction, this coated film is applied on the housing of automobile lamp, the coated side of this coated film is in the housing of automobile lamp, the eptfe membrane of this coated film is atmosphere towards the outside, steam in the housing of automobile lamp is constantly discharged in a steady stream like this, show by housing to the characteristic of the unidirectional lasting discharge water vapour of external environment condition, when automobile lamp is worked, when temperature in housing is higher, the hydrophilic high mol segment of coating is more active, absorption, it is faster that diffusion reconciliation suction goes out the speed of water vapour molecule, humidity in the housing of automobile lamp reduces thereby does not possess the condition of condensation greatly, air in housing is dried, on minute surface in the housing of automobile lamp or smooth electronical elements surface just do not have fog phenomenon and produce, the performance of automobile lamp is brought into play.
The present invention has good moisture absorption performance, and the thoroughly wet factor content of cellulose that contains Chinese Kenaf Core Buffer super fine is large, has a large amount of hydroxyls to make itself and water molecules group many, has micro-groove and micropore simultaneously, has increased moisture absorption area and diffusion area.After application the present invention, can guarantee the interior generation without knot mist condensation phenomenon of housing of automobile lamp, make electric property not be subject to the impact of moist air environment, thoroughly overturn American-European-Japanese conventional method to humidity control and regulation in housing.
Lot of experiments finds that the vapor transfer rate that steam is discharged from coated side to eptfe membrane side is greater than the vapor transfer rate that steam is discharged from eptfe membrane side direction coated side, the difference of two thoroughly wet directions causes the difference of vapor transfer rate, from coated side to passing through inside amount wet than large 30 ~ 50% left and right of vapor transfer rate in eptfe membrane side direction housing, utilize the greatest differences of the vapor transfer rate of this both direction, this coated film is applied on the housing of automobile lamp, the coated side of this coated film is in the housing of automobile lamp, the eptfe membrane of this coated film is atmosphere towards the outside, steam in the housing of automobile lamp is constantly discharged in a steady stream like this, show by housing to the characteristic of the unidirectional lasting discharge water vapour of external environment condition, when automobile lamp is worked, when temperature in housing is higher, the hydrophilic high mol segment of coating is more active, absorption, it is faster that diffusion reconciliation suction goes out the speed of water vapour molecule, humidity in the housing of automobile lamp reduces thereby does not possess the condition of condensation greatly, air in housing is dried, on minute surface in the housing of automobile lamp or smooth electronical elements surface just do not have fog phenomenon and produce, the performance of automobile lamp is brought into play.
The present invention show by housing to the characteristic of the unidirectional lasting discharge water vapour of external environment condition, make in housing air dry, the steam thoroughly having changed in the housing of former automobile lamp relies on the loose mist of cross-ventilated principle to go the pattern of revealing.
The existing good absorption property of the present invention, can stop again the infiltration of rainwater dust, makes to reach free of contamination dirt level of confidentiality in the housing of automobile lamp, the coated side of this coated film is in the housing of automobile lamp, and the eptfe membrane of this coated film is atmosphere towards the outside, the discharge that steam in the housing of automobile lamp is able to continuously again like this, show by housing to the characteristic of the unidirectional lasting discharge water vapour of external environment condition, when automobile lamp is worked, when temperature in housing is higher, the hydrophilic high mol segment of coating is more active, absorption, it is faster that diffusion reconciliation suction goes out the speed of water vapour molecule, humidity in the housing of automobile lamp reduces thereby does not possess the condition of condensation greatly, air in housing is dried, on minute surface in the housing of automobile lamp or smooth electronical elements surface just do not have fog phenomenon and produce, the performance of automobile lamp is brought into play, Chinese Kenaf Core Buffer super fine can adsorb car light plastic housing because being subject to thermogenetic volatile matter simultaneously, is conducive to car light minute surface and keeps light reflection performance.
The present invention also has and has excellent uvioresistant performance, this invention has solved the defect problem in background technology, the performance of this material has met the performance of automobile lamp and other small-sized sophisticated electronics (mobile phone, navigation terminal, microcomputer etc.) dependable performance completely, in waterproof and dustproof, grease proofing, the comprehensive requirement of protection such as wet, anti-oxidant solution corrosion thoroughly.
Can also further develop the end product that engineering is used, as terminal high value-added products such as " the coated film paster of large vapor transfer rate for automobile lamp ", " the coated film bolts (cap) of large vapor transfer rate for automobile lamp ", standardized end product industrialization manufacture is used more convenient.
Further reduce automobile lamp eliminating the design and manufacture cost of steam to its performance impact, made shell moulding simplicity.
Also there is airtight body (allowing water vapour molecule to discharge) and the high characteristic of resistance to seepage pressure, more than the water pressure resistance of this coated film has reached 10000mm height water column (relative pressure 100KPa pressure), this coated film can keep out that dell ponding soaks or the impact of the middle impact water that travels, and makes to keep dry in housing and can not soak.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a large vapor transfer rate coated film, it is characterized in that, comprise: basic rete and coating, described basic rete is eptfe membrane layer, the coating being coated on described eptfe membrane layer is the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine;
The coating agent of the described ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine comprises that the raw material uniform stirring of following weight percentage makes:
Polyurethanes 20%-25%;
Solvent dimethylformamide 55%-60%;
Hydrophilic radical solvent 2%-5%;
Chinese Kenaf Core Buffer super fine 18%-25%.
2. large vapor transfer rate coated film according to claim 1, is characterized in that, the thickness of the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine is 0.012mm-0.025mm.
3. large vapor transfer rate coated film according to claim 1, is characterized in that, the viscosity index (VI) of described coating agent is 33 Pa.s.
4. large vapor transfer rate coated film according to claim 1, is characterized in that, comprises the nonvolatile matter of 35%-45% in described coating agent.
5. large vapor transfer rate coated film according to claim 1, it is characterized in that, the manufacture craft of described Chinese Kenaf Core Buffer super fine comprises: first Chinese Kenaf Core Buffer is processed as to meal, and carry out pretreatment, then carry out thinning processing and activation processing successively, after finishing dealing with, dry, carry out again modification, then carry out miniaturization processing, finally carry out separating treatment, make Chinese Kenaf Core Buffer super fine.
6. large vapor transfer rate coated film according to claim 5, is characterized in that, modification is to add methyl diphenylene diisocyanate and polyalcohol polymeric modification in the Chinese Kenaf Core Buffer of pulverizing after drying.
7. according to the arbitrary described large vapor transfer rate coated film of claim 1-6, it is characterized in that, the preparation technology of this large vapor transfer rate coated film comprises the following steps:
A) coating agent is fed in raw material, and regulate gluing thickness;
B) unreel eptfe membrane layer, and contact gluing with coating agent, on eptfe membrane layer surface, form the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine;
C) the ester emulsion copolymerized coating of polyurethane that contains Chinese Kenaf Core Buffer super fine is carried out to heating, drying;
D) maturation is solidified, and makes large vapor transfer rate coated film.
8. large vapor transfer rate coated film according to claim 7, is characterized in that, in step a), gluing thickness is 0.012mm-0.025mm.
9. large vapor transfer rate coated film according to claim 7, is characterized in that, in step c), the temperature of heating, drying is 80 ℃-100 ℃.
10. large vapor transfer rate coated film according to claim 7, is characterized in that, in step d), it is to deposit at least 24h under temperature is the environment of 20 ℃-40 ℃ that maturation is solidified.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245980.1A CN104029449B (en) | 2014-06-05 | 2014-06-05 | Big vapor transfer rate coated film |
| PCT/CN2014/081385 WO2015184665A1 (en) | 2014-06-05 | 2014-07-01 | Coating film having high water vapor transmission rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245980.1A CN104029449B (en) | 2014-06-05 | 2014-06-05 | Big vapor transfer rate coated film |
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| Publication Number | Publication Date |
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| CN104029449A true CN104029449A (en) | 2014-09-10 |
| CN104029449B CN104029449B (en) | 2016-08-24 |
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| CN201410245980.1A Active CN104029449B (en) | 2014-06-05 | 2014-06-05 | Big vapor transfer rate coated film |
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| CN104762818A (en) * | 2015-04-02 | 2015-07-08 | 杭州和顺纺织品有限公司 | One-side-coated anti-flame moisture-permeable waterproof cloth and preparation process thereof |
| WO2015139385A1 (en) * | 2014-03-20 | 2015-09-24 | 常州市泛亚微透科技有限公司 | Continuous unidirectional breathable coating film for automotive electrical and electronic devices and manufacturing method for the coating film |
| CN105419510A (en) * | 2015-12-21 | 2016-03-23 | 潍坊市宏源防水材料有限公司 | Waterproof and moisture permeable coating |
| CN106670078A (en) * | 2017-02-20 | 2017-05-17 | 江苏泛亚微透科技股份有限公司 | High-water-pressure-resistance transaudient expanded polytetrafluoroethylene coating film and manufacturing method thereof |
| CN106671541A (en) * | 2017-02-20 | 2017-05-17 | 江苏泛亚微透科技股份有限公司 | Acoustically transparent membrane module with high resistance to water pressure and manufacture method thereof |
| CN111864153A (en) * | 2019-04-26 | 2020-10-30 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN115538185A (en) * | 2022-09-20 | 2022-12-30 | 深圳陆城装饰设计工程有限公司 | High-performance waterproof and vapor-permeable coating structure for building |
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