CN102303428B - Modified material film of bidirectional stretched expanded polytetrafluoroethylene film composite non-woven fabric for light emitting diode (LED) lamp and preparation method for modified material film - Google Patents
Modified material film of bidirectional stretched expanded polytetrafluoroethylene film composite non-woven fabric for light emitting diode (LED) lamp and preparation method for modified material film Download PDFInfo
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- CN102303428B CN102303428B CN201110114932.5A CN201110114932A CN102303428B CN 102303428 B CN102303428 B CN 102303428B CN 201110114932 A CN201110114932 A CN 201110114932A CN 102303428 B CN102303428 B CN 102303428B
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Abstract
The invention relates to a modified material film of a bidirectional stretched expanded polytetrafluoroethylene film composite non-woven fabric for a light emitting diode (LED) lamp and a preparation method for the modified material film. The modified material film comprises a bidirectional stretched expanded polytetrafluoroethylene micropore film layer and one or more layers of non-woven fabric compositely connected with the surface of the bidirectional stretched expanded polytetrafluoroethylene micropore film layer. The modified material film is simple to install, is favorable for eliminating condensed dew in the lamp, realizes balance of inner and outer air pressure of the lamp, and prevents rainwater, salt crystal and fog from entering the lamp; under the extreme environment, the LED lamp has long service life, has no fault, and is maintenance-free; and normal work of the LED lamp is ensured, faults of electronic and inductance products due to salt corrosion are greatly reduced, condensed fog and condensed dew are greatly reduced, the LED outdoor illumination lamp has better heat dissipation effect, the stress of a shell sealing strip can be reduced by balancing the pressure, and the design difficulty and the manufacturing cost of a housing are reduced.
Description
Technical field
The present invention relates to a kind of material modified film, especially a kind of material modified film and preparation method of the biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture.
Background technology
The product requirements such as LED street lamp, Tunnel Lamp, Landscape Lamp and Commercial lighting reach IP65 grade (dust and water protection), and traditional fitting structure is totally enclosed environment, makes cannot carry out gas exchange with external environment condition in light fixture.When LED light fixture works long hours and causes gas pressure rising pressure in light fixture to increase, produce pressure differential with extraneous air, increase light fixture inner wall pressure, acceleration finished product light fixture is aging.Light fixture expands with heat and contract with cold simultaneously, make rainwater and moist fog invade lamp interior along light fixture seam, affect the luminous efficiency of light fixture, make LED semiconductor oxide, affected the reliability of LED semiconductor circuit long-term work, many LED lamps can not be luminous with regard to being out of order less than the normal service life phase.
Summary of the invention
In order to overcome above defect, the technical problem to be solved in the present invention is: the microporous membrane that proposes a kind of expanded PTFE of the biaxial tension based on dustproof, waterproof and ventilative macromolecule new material, solve LED light fixture external and internal pressure imbalance problem, for material modified film and the preparation method of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.
The technical solution adopted in the present invention is: a kind of material modified film of the biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture, comprise the microporous membrane layer of the expanded PTFE of biaxial tension, be connected with the microporous membrane layer surface recombination of the expanded PTFE of described biaxial tension be more than or equal to one deck nonwoven.
According to another preferred embodiment, further comprise that for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture on the side surface of microporous membrane layer of the expanded PTFE of described biaxial tension, composite joint has layer of non-woven fabric.
According to another preferred embodiment, further comprise that for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture the equal composite joint in positive and negative surface of the microporous membrane layer of the expanded PTFE of described biaxial tension has nonwoven.
According to another preferred embodiment, further comprise that for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture described nonwoven is the nonwoven of hating oily pre-treatment through waterproof.
According to another preferred embodiment, further comprise between the microporous membrane layer of expanded PTFE of described nonwoven and described biaxial tension by binding agent composite joint for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.
The invention still further relates to a kind of preparation method of material modified film of the biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture,
A, microporous membrane layer and the nonwoven of the expanded PTFE of biaxial tension are unreeled respectively;
B, be coated with activation at the microporous membrane layer surface of the expanded PTFE of biaxial tension sodium naphthalene tetrahydrofuran solution after unreeling;
After c, coating have activated, the microporous membrane layer of the expanded PTFE of biaxial tension is connected with described modification layer;
D, microporous membrane layer and the nonwoven of the expanded PTFE that connects the biaxial tension after finishing dealing with are carried out to the processing of low temperature hot blast heated lamination;
E, heated lamination are carried out waterproof after finishing dealing with and are hated oil processing;
F, complete after above-mentioned treatment process, the material modified film of biaxial tension eptfe membrane compound nonwoven cloth is carried out to low temperature hot blast drying and processing;
G, complete after oven dry, the verification test of the pressure of breathing freely, Air permenbility and water-impervious pressure, carries out rolling after test passes, finally make the material modified film for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.
According to another preferred embodiment, further comprise that for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture the preparation method of the microporous membrane layer of the expanded PTFE of described biaxial tension is:
A, polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid;
B, be pressed into cylinder blank after having mixed;
C, employing rolling process are laminated cylinder blank;
D, thin slice is sloughed to liquid extrusion aid;
After e, liquid extrusion aid, carry out two-way Uniform Tension;
F, carry out thermal finalization after having stretched, make the microporous membrane layer of the expanded PTFE of biaxial tension.
According to another preferred embodiment, for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture further comprise described two-way Uniform Tension longitudinally and the pass of cross directional stretch be 2: 1.
According to another preferred embodiment, further comprise that for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture the material modified film of the described biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture makes difform ventilative paster through reprocessing.
According to another preferred embodiment, further comprise that for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture the material modified film of the described biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture makes LED light fixture waterproof ventilating bolt through reprocessing.
According to another preferred embodiment, further comprise that for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture modification layer is included in after the binding agent that is coated with active site between the expanded PTFE microporous membrane layer of biaxial tension and nonwoven compound, described binding agent is micron order coating.
According to another preferred embodiment, further comprise that for the preparation method of the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture the waterproof of described nonwoven hates oily pre-treating technology to be:
A, nonwoven do pre-treatment and prepare;
B, ready nonwoven unreel;
C, on nonwoven, be coated with fluorocarbon;
D, the nonwoven that is coated with fluorocarbon is carried out to low temperature hot blast drying and processing;
E, nonwoven rolling after oven dry is completed are for subsequent use.
The invention has the beneficial effects as follows: the present invention is the microporous membrane of the expanded PTFE based on macromolecular material biaxial tension, combine with the helicitic texture part of injection mo(u)lding, install simple and easy, 0.0004 micron of water vapour molecule of diameter and the interior air heating of lamp in LED outdoor lighting lamp are flowed freely into outside lamp by the expanded PTFE microporous membrane in assembly, eliminate condensation phenomenon in lamp, realize the inside and outside air pressure balance of lamp, stop rainwater, salt grain crystal and fog to enter in lamp; Non-maintaining in the prolongation in service life of extreme environment LED light fixture and fault-free, guarantee that LED light fixture normally works, electronics, inductor product fault because salt corrosion causes are greatly reduced, low fogging and dewfall are greatly fallen, can allow LED outdoor lighting lamp have better heat radiation function, can reduce by equalizing pressure the stress of casing sealing bar, reduce case design difficulty and manufacturing cost, make the reduction of LED outdoor lighting lamp cost make large-scale application become possibility, thereby save a large amount of illumination electric energy.
Brief description of the drawings
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
Fig. 2 is the structural representation of the another kind of preferred embodiment of the present invention;
In figure: 1, the microporous membrane layer of the expanded PTFE of biaxial tension, 2, nonwoven, 3, binding agent.
Detailed description of the invention
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1-2, for a material modified film for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture, comprise the microporous membrane layer 1 of the expanded PTFE of biaxial tension, be connected with microporous membrane layer 1 surface recombination of the expanded PTFE of described biaxial tension be more than or equal to one deck nonwoven 2.
Microporous membrane layer 1 surface recombination of the expanded PTFE of biaxial tension of the present invention has nonwoven 2, and the macromolecular material of the specific function high added values such as variation, ultraviolet ray at sunshine and the dust with very strong resistance to rainwater or acid rain, environment temperature that obtain after expanded PTFE material is processed by above-mentioned process for modifying surface method is exactly the material modified film for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.Only have expanded PTFE material to have enough strengths of materials to keep out the test of variation, ultraviolet ray at sunshine and the dust of rainwater or acid rain, environment temperature, the performance of LED light fixture just can be more reliable and more stable, to the processing of expanded PTFE material surface modifying, just can better bring into play its effect.
The complex form of nonwoven 2 comprises:
As shown in Figure 1, on a side surface of the microporous membrane layer 1 of the expanded PTFE of biaxial tension, composite joint has layer of non-woven fabric 2.
As shown in Figure 2, the equal composite joint in positive and negative surface of the microporous membrane layer 1 of the expanded PTFE of biaxial tension has nonwoven 2.
Wherein, the nonwoven of nonwoven 2 for hating oily pre-treatment through waterproof.Nonwoven 2 passes through binding agent 3 composite joints with the microporous membrane layer 1 of the expanded PTFE of described biaxial tension.
Before described nonwoven 2 is compound, must do waterproof and hate oily pre-treatment, the waterproof of nonwoven 2 hates oily pre-treating technology to be:
A, nonwoven 2 do pre-treatment and prepare;
B, ready nonwoven 2 unreel with the speed of 0.6 m/min;
C, on nonwoven 2, be coated with fluorocarbon, if fluorochemical monomer is as CH2F2 etc.;
D, the nonwoven 2 that is coated with fluorocarbon is carried out to 45 DEG C of-50 DEG C of hot-air seasoning processing of low temperature;
E, nonwoven 2 rollings after oven dry is completed are for subsequent use.
This macromolecular material, for material modified film high resilience and the pliability of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture, has microfibre and connects and the network structure of formation, has improved film strength; These microfibres form countless pores, make the micropore diameter of ventilated membrane at 0.01～20 μ m.The molecular diameter of steam is 0.0004 μ m, rainwater diameter 100 μ m～3000 μ m, therefore this macromolecule modified material just has gas and keeps LED light fixture internal and external pressure balance function by rete convection current free exchange, and rainwater, dust are blocked in rete outer surface and can not enter LED light fixture.
The material modified film that is used for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture can be bending arbitrarily, porous, high-low temperature resistant adverse circumstances use, with rubber-plastics material be easy to weld fine and close in conjunction with firmly, the unique performance such as good, the uvioresistant of chemical inertness, nonflammable and anti-oxidant acid and alkali-resistance solution corrosion, make its instructions for use that is highly suitable for LED light trade harshness and amblent air temperature condition.
Although this material of microporous membrane layer 1 material of the expanded PTFE of biaxial tension is in chemical inertness, bio-compatibility, high thermal resistance, chemical resistance, low combustible, low-friction coefficient, low-k, water proof and dust proof, weatherability, there is good combination property the aspects such as gas permeability, but the microporous membrane material of the expanded PTFE of pure biaxial tension is in the time of severe outdoor environment application, the performance of some aspect needs after intensive treatment, the microporous membrane material of the expanded PTFE of biaxial tension just has enough strengths of materials and keeps out rainwater or acid rain, the variation of environment temperature, the test of sunshine ultraviolet ray and dust, the performance of LED light fixture just can be more reliable and more stable, the i.e. microporous membrane material surface modifying processing of the expanded PTFE to biaxial tension, just can better bring into play its effect.
For a preparation method for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture,
A, the microporous membrane layer of the expanded PTFE of biaxial tension 1 and nonwoven 2 are unreeled with the speed of 0.1 m/min respectively;
B, be coated with activation at the microporous membrane layer surface of the expanded PTFE of biaxial tension sodium naphthalene tetrahydrofuran solution after unreeling;
After c, coating have activated, the microporous membrane layer 1 of the expanded PTFE of biaxial tension is connected with described modification layer, modification layer is included in the expanded PTFE microporous membrane layer 1 of biaxial tension and through compound after being coated with the binding agent of active site between the nonwoven 2 of pre-treatment, binding agent is micron order coating.
D, the microporous membrane layer 1 of the expanded PTFE that connects the biaxial tension after finishing dealing with is carried out to the heated lamination processing of 45 DEG C of-50 DEG C of hot blasts of low temperature with nonwoven 2;
E, heated lamination are carried out waterproof after finishing dealing with and are hated oil processing;
F, complete after above-mentioned treatment process, the material modified film of biaxial tension eptfe membrane compound nonwoven cloth is carried out to 45 DEG C of-50 DEG C of hot-air seasoning processing of low temperature;
G, complete after oven dry, the breathe freely verification test of pressure, Air permenbility and water-impervious pressure, after test passes, the speed with 0.1 m/min is carried out rolling, finally makes the material modified film for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.
Wherein the acceptability limit of every test item is Air permenbility (ml/ (cm
2.min))>=100, (kPa)>=25, water-impervious pressure (relative pressure) is breathed freely pressure relative pressure (kPa)≤6 and I P degree of protection > IP65.
Wherein, the present invention is based on the microporous membrane layer 1 of the expanded PTFE of biaxial tension, its preparation method is:
A, polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid;
B, be pressed into cylinder blank after having mixed;
C, employing rolling process are laminated cylinder blank;
D, thin slice is sloughed to liquid extrusion aid;
After e, liquid extrusion aid, carry out according to longitudinally and the pass of cross directional stretch be that the method for 2: 1 is carried out two-way Uniform Tension;
F, carry out thermal finalization after having stretched, make the microporous membrane layer 1 of the expanded PTFE of biaxial tension.
Wherein, the microporous membrane layer 1 of the expanded PTFE of biaxial tension has improved ability and water proof and dust proof and the ventilative ability of intensity, acid rain resistant after surface treatment, is conducive to eliminate the condensation phenomenon in LED lamp; Also improve the ability of resistance to variation of ambient temperature, make the gas of LED outdoor lamp reach pressure balance by gaseous exchange inside and outside Modified Membrane, can therefore not suck rainwater and dust, guarantee that LED light fixture normally works, greatly reduce electronics, inductor product fault because salt corrosion causes; While has also solved the welding compactness problem with plastic products, reduces case design difficulty and manufacturing cost.
The present invention combines with the helicitic texture part of injection mo(u)lding, install simple and easy, 0.0004 micron of water vapour molecule of diameter and the interior air heating of lamp in LED outdoor lighting lamp are flowed freely into outside lamp by the expanded PTFE microporous membrane in assembly, eliminate condensation phenomenon in lamp, realize the inside and outside air pressure balance of lamp, stop rainwater, salt grain crystal and fog to enter in lamp; Non-maintaining in the prolongation in service life of extreme environment LED light fixture and fault-free, guarantee that LED light fixture normally works, electronics, inductor product fault because salt corrosion causes are greatly reduced, low fogging and dewfall are greatly fallen, can allow LED outdoor lighting lamp have better heat radiation function, can reduce by equalizing pressure the stress of casing sealing bar, reduce case design difficulty and manufacturing cost, make the reduction of LED outdoor lighting lamp cost make large-scale application become possibility, thereby save a large amount of illumination electric energy.
It has the ventilative product size of series of standards and instant parts to make difform ventilative paster for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture through reprocessing, and design application easily.
It is good to have realized with plastic products welding compactness for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture, is suitable for developing various LED light fixture waterproof ventilating bolts.
Taking above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (5)
1. for a preparation method for the material modified film of the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture, it is characterized in that:
A, microporous membrane layer and the nonwoven of the expanded PTFE of biaxial tension are unreeled respectively;
B, be coated with activation at the microporous membrane layer surface of the expanded PTFE of biaxial tension sodium naphthalene tetrahydrofuran solution after unreeling;
After c, coating have activated, the microporous membrane layer of the expanded PTFE of biaxial tension is connected with modification layer, described modification layer is the composite bed of the binding agent of nonwoven and coating active site, and described binding agent is micron order coating;
D, microporous membrane layer and the nonwoven of the expanded PTFE that connects the biaxial tension after finishing dealing with are carried out to the processing of low temperature hot blast heated lamination;
E, heated lamination are carried out waterproof after finishing dealing with and are hated oil processing;
F, complete after above-mentioned treatment process, the material modified film of biaxial tension eptfe membrane compound nonwoven cloth is carried out to low temperature hot blast drying and processing;
G, complete after oven dry, the verification test of the pressure of breathing freely, Air permenbility and water-impervious pressure, carries out rolling after test passes, finally make the material modified film for the biaxial tension eptfe membrane compound nonwoven cloth of LED light fixture.
2. the preparation method of the material modified film of a kind of biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture according to claim 1, is characterized in that: the preparation method of the microporous membrane layer of the expanded PTFE of described biaxial tension is:
A, polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid;
B, be pressed into cylinder blank after having mixed;
C, employing rolling process are laminated cylinder blank;
D, thin slice is sloughed to liquid extrusion aid;
E, slough after liquid extrusion aid, carry out two-way Uniform Tension;
F, carry out thermal finalization after having stretched, make the microporous membrane layer of the expanded PTFE of biaxial tension.
3. the preparation method of the material modified film of a kind of biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture according to claim 2, is characterized in that: the pass longitudinal and cross directional stretch of described two-way Uniform Tension is 2:1.
4. the preparation method of the material modified film of a kind of biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture according to claim 1, is characterized in that: the material modified film of the described biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture is made difform ventilative paster through reprocessing.
5. the preparation method of the material modified film of a kind of biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture according to claim 1, is characterized in that: the material modified film of the described biaxial tension eptfe membrane compound nonwoven cloth for LED light fixture is made LED light fixture waterproof ventilating bolt through reprocessing.
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| CN201110114932.5A CN102303428B (en) | 2011-05-05 | 2011-05-05 | Modified material film of bidirectional stretched expanded polytetrafluoroethylene film composite non-woven fabric for light emitting diode (LED) lamp and preparation method for modified material film |
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| CN201110114932.5A CN102303428B (en) | 2011-05-05 | 2011-05-05 | Modified material film of bidirectional stretched expanded polytetrafluoroethylene film composite non-woven fabric for light emitting diode (LED) lamp and preparation method for modified material film |
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| CN102303428B true CN102303428B (en) | 2014-07-09 |
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| CN103862766B (en) * | 2014-03-20 | 2016-01-27 | 江苏泛亚微透科技股份有限公司 | Auto electric electronic equipment coated film paster and manufacture method thereof |
| CN104029642B (en) * | 2014-03-20 | 2016-05-18 | 江苏泛亚微透科技股份有限公司 | Moisture-inhibiting parts and manufacture method thereof for auto electric electronic equipment |
| CN105882079A (en) * | 2014-11-26 | 2016-08-24 | 杭州安普鲁薄膜科技有限公司 | Waterproof film with large ventilating volume |
| CN107461719A (en) * | 2017-08-28 | 2017-12-12 | 江苏青诚信息科技有限公司 | A kind of LED lamp structure water-tight device |
| CN111138991A (en) * | 2019-12-30 | 2020-05-12 | 苏州然祺电子科技有限公司 | Waterproof and breathable high-toughness back adhesive film and preparation method thereof |
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