CN107629339A - Grafted polyethylene cross linking membrane and its preparation method and application - Google Patents
Grafted polyethylene cross linking membrane and its preparation method and application Download PDFInfo
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- CN107629339A CN107629339A CN201711014160.1A CN201711014160A CN107629339A CN 107629339 A CN107629339 A CN 107629339A CN 201711014160 A CN201711014160 A CN 201711014160A CN 107629339 A CN107629339 A CN 107629339A
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Abstract
The invention provides a kind of grafted polyethylene cross linking membrane, include the component of following parts by weight：70~85 parts of silane grafted polyethylene, 10~27 parts of white inorganic filler, 0.5~1.5 part of organic peroxide crosslinking agent, 0.2~0.5 part of anti-ultraviolet ageing auxiliary agent, 0.2~1.5 part of antioxidant.Grafted polyethylene cross linking membrane provided by the invention possesses excellent mechanical property and electrical insulation capability, internal surface layer as back panel of solar photovoltaic module, it is compound with fluorine-containing outer coversheet, the fluorine-containing backboard of one side that performance compares favourably with double-side fluorine backboard can be made, and it is cheap.
Description
Technical field
The present invention relates to the technical field of cross linking membrane, more particularly to a kind of grafted polyethylene cross linking membrane and preparation method thereof and
Using.
Background technology
Solar photovoltaic assembly is used in the solar photovoltaic assembly back side with backboard (hereinafter referred to as backboard), directly with outside
The performance such as photovoltaic encapsulation material, its ageing-resistant, resistance to insulation, resistance to aqueous vapor of environment contact should meet photovoltaic service life
It is required that.
Backboard is typically by up of three layers, two surface layers and an internal layer, wherein the surface layer towards photovoltaic module is internal surface layer,
The surface layer of Environment Oriented is outer coversheet, is internal layer between two surface layers.Whether fluorine material is used according to surface layer, is divided into two-sided contain
Three kinds of the fluorine-containing backboard of fluorine backboard, one side, floride-free backboard.Double-side fluorine backboard superior performance, typical double-side fluorine backboard are TPT
Backboard, i.e. two surface layers all use the Tadlar materials of E.I.Du Pont Company, central to use PET (polyester film) material, but price is held high
It is expensive, use in photovoltaic module and challenged by other materials backboard.
There are many photovoltaic modulies to use the fluorine-containing backboard of one side or floride-free backboard, typical backboard such as TPE, BBF etc., valency at present
Lattice are relatively low, but mechanical property, electrical insulation capability etc. have certain gap compared with double-side fluorine backboard.
The content of the invention
In view of this, present invention aims at provide a kind of grafted polyethylene cross linking membrane and its preparation method and application.This
The grafted polyethylene cross linking membrane that invention provides possesses excellent mechanical property and electrical insulation capability, is carried on the back as solar photovoltaic assembly
The internal surface layer of plate, it is compound with fluorine-containing outer coversheet, the fluorine-containing backboard of one side that performance compares favourably with double-side fluorine backboard, and valency can be made
Lattice are cheap.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
The invention provides a kind of grafted polyethylene cross linking membrane, include the component of following parts by weight：Silane grafted polyethylene
70~85 parts, 10~27 parts of white inorganic filler, 0.5~1.5 part of organic peroxide crosslinking agent, anti-ultraviolet ageing auxiliary agent 0.2
~0.5 part, 0.2~1.5 part of antioxidant.
Preferably, the organic peroxide crosslinking agent be 2,5- dimethyl -2,5- di-tert-butyl peroxide hexanes and/or
Cumyl t-butyl peroxide.
Preferably, the white inorganic filler includes titanium dioxide, and the particle diameter of the titanium dioxide is 1~100 μm.
Preferably, the white inorganic filler also includes nano silicon, the particle diameter of the nano silicon for 1~
100nm；The ratio of weight and number of the titanium dioxide and nano silicon is 1:1.
Preferably, the anti-ultraviolet ageing auxiliary agent is that benzophenone, three kinds of benzotriazole, hindered amines uvioresistants are old
Change one or more mixtures in auxiliary agent.
Preferably, the benzophenone anti-ultraviolet ageing auxiliary agent is 2-hydroxy-4-n-octoxybenzophenone, the benzene
It is described and triazole type anti-ultraviolet ageing auxiliary agent is 2- (the 2'- hydroxyl -3'- tert-butyl group -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles
Hindered amines anti-ultraviolet ageing auxiliary agent for it is poly- [[6- [(1,1,3,3- tetramethyl butyls) amino]-s- triazine -2,4- diyls] -
[(2,2,6,6- tetramethyl -4- piperidyls) imino group] -1,6- dihexyls-[(2,2,6,6- tetramethyl -4- piperidyls) imido].
Preferably, the antioxidant includes four [β-(3', 5'- di-t-butyl -4'- hydroxy phenyls) propionate
With phosphorous acid three (2,4- di-tert-butyl-phenyls) ester.
Present invention also offers the preparation method of grafted polyethylene cross linking membrane described in above-mentioned technical proposal, including following step
Suddenly：
1) every kind of white inorganic filler is mixed with part silane grafted polyethylene in raw material respectively, in 150~220 DEG C of bars
Melting extrusion under part, pelletizing, cooling, respectively obtain the masterbatch that particle diameter is 2~5mm；
2) it is the step 1) masterbatch and remaining silane grafted polyethylene, organic peroxide crosslinking agent, uvioresistant is old
Change auxiliary agent and antioxidant mixing, the mixed material melting extrusion that will be obtained, temperature is from 100 DEG C during the melting extrusion
It is increased to 170~195 DEG C；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, at a temperature of 65~85 DEG C at curing
Reason 45~72 hours, obtains grafted polyethylene cross linking membrane.
Preferably, the ratio of weight and number of white inorganic filler and silane grafted polyethylene is 1 in every kind of masterbatch:1~
1.2。
The invention provides preparation side described in grafted polyethylene cross linking membrane described in above-mentioned technical proposal or above-mentioned technical proposal
Application of the grafted polyethylene cross linking membrane that method obtains in back panel of solar photovoltaic module.
The invention provides a kind of grafted polyethylene cross linking membrane, include the component of following parts by weight：Silane grafted polyethylene
70~85 parts, 10~27 parts of white inorganic filler, 0.5~1.5 part of organic peroxide crosslinking agent, anti-ultraviolet ageing auxiliary agent 0.2
~0.5 part, 0.2~1.5 part of antioxidant.The present invention is using silane grafted polyethylene as major ingredient, in organic peroxide crosslinking agent
The lower cross-linked polymeric of effect forms the cross-linked polymer of network structure, so as to significantly improve the mechanical property of silane grafted polyethylene and
Electrical insulation capability；The auxiliary agent such as white inorganic filler, anti-ultraviolet ageing auxiliary agent, antioxidant is filled in the network structure crosslinking simultaneously
In the space of polymer, wherein white inorganic filler plays good strengthening action, and anti-ultraviolet ageing auxiliary agent significantly improves crosslinking
The resistance to UV aging of polymer, the presence of antioxidant effectively can delay or suppress the progress of polymer oxidizing process, so as to
Finally give mechanical property and the excellent grafted polyethylene cross linking membrane of electrical insulation capability.
The result of embodiment shows that grafted polyethylene crosslinking film thickness provided by the invention is 0.3 ± 0.05mm, and stretching is strong
Degree>45MPa, elongation at break>100%, longitudinal contraction rate<2.0%, lateral shrinkage<1.0%, specific insulation>3×1015
Ω·cm；The internal surface layer of back panel of solar photovoltaic module is used as, it is compound with fluorine-containing outer coversheet, mechanical property and electricity can be made
The fluorine-containing backboard of one side that insulating properties compare favourably with double-side fluorine backboard, and meet GB/T 31034-2014《Crystalline silicon sun electricity
Pond component insulating back panel》It is it is required that and cheap.
Present invention also offers a kind of preparation method of grafted polyethylene cross linking membrane, step is simple, and cost is cheap, is easy to advise
Modelling produces.
Embodiment
The invention provides a kind of grafted polyethylene cross linking membrane, include the component of following parts by weight：Silane grafted polyethylene
70~85 parts, 10~27 parts of white inorganic filler, 0.5~1.5 part of organic peroxide crosslinking agent, anti-ultraviolet ageing auxiliary agent 0.2
~0.5 part, 0.2~1.5 part of antioxidant.
Grafted polyethylene cross linking membrane provided by the invention is using silane grafted polyethylene as major ingredient, in embodiments of the invention
In, it is preferred to use there is the silane grafted polyethylene of following physical parameter：Density 0.929g/cm3, tensile strength 14MPa, fracture
Elongation 700%, specific insulation 1018Ω cm, melt flow rate (MFR) 5g/10min.In the present invention, the Silane Grafted
The parts by weight of polyethylene are preferably 75~80 parts.
Grafted polyethylene cross linking membrane provided by the invention includes 0.5~1.5 part of organic peroxy thing crosslinking agent, is preferably
1.0~1.3 parts.In the present invention, the organic peroxide crosslinking agent is preferably 2,5- dimethyl -2,5- di-t-butyl peroxides
Change hexane and/or cumyl t-butyl peroxide.When the organic peroxide crosslinking agent is two tertiary fourths of 2,5- dimethyl -2,5-
When base peroxidating hexane and cumyl t-butyl peroxide, both ratios of weight and number are preferably 1:1.The present invention utilizes organic mistake
The crosslinked action of oxygen thing crosslinking agent causes silane grafted polyethylene cross-linked polymeric to form the cross-linked polymer of network structure, so as to aobvious
Write the mechanical property and electrical insulation capability for improving silane grafted polyethylene.
Grafted polyethylene cross linking membrane provided by the invention includes 10~27 parts of white inorganic filler, and preferably 11.5~23
Part, more preferably 16~20 parts.In the present invention, the white inorganic filler preferably includes titanium dioxide, the grain of the titanium dioxide
Footpath is preferably 1~100 μm, more preferably 20~80 μm, most preferably 30~60 μm.
In the present invention, the white inorganic filler preferably also includes nano silicon, the nano silicon
Particle diameter is preferably 1~100nm, more preferably 30~80nm；When the white inorganic filler includes titanium dioxide and nanometer titanium dioxide
During silicon, the ratio of weight and number of the titanium dioxide and nano silicon is preferably 1:1.The present invention is filled using white inorganic filler
Good strengthening action is played in the space of network structure cross-linked polymer.
Grafted polyethylene cross linking membrane provided by the invention includes 0.2~0.5 part of anti-ultraviolet ageing auxiliary agent, and preferably 0.3
~0.4 part.In the present invention, the anti-ultraviolet ageing auxiliary agent is preferably benzophenone, benzotriazole, three kinds of hindered amines
One or more mixtures in anti-ultraviolet ageing auxiliary agent；The benzophenone anti-ultraviolet ageing auxiliary agent is more preferably 2- hydroxyls
Base -4- oxy-octyl benzophenones, the benzotriazole anti-ultraviolet ageing auxiliary agent are more preferably 2- (the tertiary fourths of 2'- hydroxyls -3'-
Base -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles, the hindered amines anti-ultraviolet ageing auxiliary agent it is more preferably poly- [[6- [(1,1,
3,3- tetramethyl butyls) amino]-s- triazine -2,4- diyls]-[(2,2,6,6- tetramethyl -4- piperidyls) imino group] -1,6-
Dihexyl-[(2,2,6,6- tetramethyl -4- piperidyls) imido]；A variety of anti-ultraviolet ageing auxiliary agents are further preferred when applying simultaneously
The parts by weight applications such as various anti-ultraviolet ageing auxiliary agents.The present invention is filled in network structure cross-linked polymeric using anti-ultraviolet ageing auxiliary agent
In the space of thing, the resistance to UV aging of cross-linked polymer is significantly improved.
Grafted polyethylene cross linking membrane provided by the invention includes 0.2~1.5 part of antioxidant, preferably 0.5~1.0 part.
In the present invention, the antioxidant preferably include four [β-(3', 5'- di-t-butyl -4'- hydroxy phenyls) propionate and
Phosphorous acid three (2,4- di-tert-butyl-phenyl) ester, further preferred four [β-(3', 5'- di-t-butyl-the 4'- hydroxy phenyls)
The ratio of weight and number of propionate and phosphorous acid three (2,4- di-tert-butyl-phenyls) ester is 1:1.The present invention utilizes antioxygen
Agent is filled in the space of network structure cross-linked polymer, effectively delays or suppress the progress of polymer oxidizing process.
The present invention is to the silane grafted polyethylene, white inorganic filler, organic peroxide crosslinking agent, anti-ultraviolet ageing
The source of auxiliary agent and antioxidant does not have particular/special requirement, using the above-mentioned substance in source known to those skilled in the art, specifically
Such as commercially available above-mentioned substance.
The invention provides the preparation method of grafted polyethylene cross linking membrane described in above-mentioned technical proposal, comprise the following steps：
1) every kind of white inorganic filler is mixed with part silane grafted polyethylene in raw material respectively, in 150~220 DEG C of bars
Melting extrusion under part, pelletizing, cooling, respectively obtain the masterbatch that particle diameter is 2~5mm；
2) it is the step 1) masterbatch and remaining silane grafted polyethylene, organic peroxide crosslinking agent, uvioresistant is old
Change auxiliary agent and antioxidant mixing, the mixed material melting extrusion that will be obtained, temperature is from 100 DEG C during the melting extrusion
It is increased to 170~195 DEG C；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, at a temperature of 65~85 DEG C at curing
Reason 45~72 hours, obtains grafted polyethylene cross linking membrane.
The present invention mixes every kind of white inorganic filler with part silane grafted polyethylene in raw material respectively, 150~220
Melting extrusion under the conditions of DEG C, pelletizing, cooling, respectively obtain the masterbatch that particle diameter is 2~5mm.Specifically, when heretofore described white
When inorganic filler is titanium dioxide, titanium dioxide is mixed with the silane grafted polyethylene of part mass, by melting extrusion, pelletizing and
Cooling, titanium dioxide masterbatch is made；When the white inorganic filler is titanium dioxide and nano silicon, by titanium dioxide and nanometer
Silica mixes with part silane grafted polyethylene respectively, by melting extrusion, pelletizing and cooling, respectively obtains titanium dioxide mother
Material and nanometer titanium dioxide silicon original material.In the present invention, white inorganic filler and silane grafted polyethylene in every kind of masterbatch
Ratio of weight and number is preferably 1:1~1.2, the dosage of the white inorganic filler is consistent with described in species and above-mentioned technical proposal,
It will not be repeated here.
In the present invention, the mixing of the white inorganic filler and part silane grafted polyethylene is preferably entered in mixer
OK, the melting extrusion is preferably carried out in an extruder, and preferred molten extrusion temperature is 160~200 DEG C, and the present invention is to mixer
And the model of extruder is not particularly limited.In the present invention, the preferably dry cutting process of the pelletizing, the cooling are preferably cooled to
Room temperature, the technological means of cooling treatment is not particularly limited, is using cooling technology scheme well known to those skilled in the art
Can.
In the present invention, first every kind of white inorganic filler is mixed with part silane grafted polyethylene in raw material respectively, melted
Melt extrusion, masterbatch is made in pelletizing, cooling, the dispersiveness of white inorganic filler can be effectively improved.
After obtaining masterbatch, the present invention by the masterbatch and remaining silane grafted polyethylene, organic peroxide crosslinking agent,
Anti-ultraviolet ageing auxiliary agent and antioxidant mixing, the mixed material melting extrusion that will be obtained are warm during the melting extrusion
Degree is increased to 170~195 DEG C from 100 DEG C.In the present invention, the temperature of the mixed material melting extrusion preferably rises from 100 DEG C
Up to 180~190 DEG C, preferably heating rate is 5~20 DEG C/min, and further preferred heating rate is 5~8 DEG C/min.At this
In invention, the remaining silane grafted polyethylene dosage is that silane grafted polyethylene total amount subtracts the poly- second of Silane Grafted in masterbatch
Parts by weight remained by the dosage of alkene, the use of the organic peroxide crosslinking agent, anti-ultraviolet ageing auxiliary agent and antioxidant
Amount is with species with unanimously, will not be repeated here described in above-mentioned technical proposal.In the present invention, the masterbatch and remaining silane connect
The mixing of branch polyethylene, organic peroxide crosslinking agent, anti-ultraviolet ageing auxiliary agent and antioxidant is carried out preferably in mixer,
The melting extrusion is preferably carried out in an extruder, and the present invention is not particularly limited to the model of mixer and extruder.
After obtaining the mixed material of melting extrusion, the present invention shapes the mixed material of the melting extrusion through press mold, cold
But, maturation process 45~72 hours at a temperature of 65~85 DEG C, obtain grafted polyethylene cross linking membrane.In the present invention, it is described
Press mold is carried out preferably by the way of roll-in；Specifically in an embodiment of the present invention, pressed using the pressure roller of logical cooling water
Film is shaped, and preferably press mold and cooling is carried out simultaneously, is cooled and shaped mixed material press mold.Wherein, obtained after the press mold sizing
The thickness of polymer film be preferably 0.28~0.32mm.
In the present invention, obtained polymer film is cooled down after the press mold sizing, using spray preferably in natural environment
The mode of water smoke is cooled down, and the mixed material of melting extrusion preferably is cooled into 50~60 DEG C.
In the present invention, the polymer film after the cooling carries out maturation process preferably in curing chamber；It is specifically, described
Polymer film after cooling can be sent directly into curing chamber and carry out maturation process, and also can set to 0 .5~5 day in natural environment decentralization send again
Enter curing chamber and carry out maturation process, the temperature of the maturation process is preferably 70~80 DEG C；The time of the maturation process is preferred
For 48~60 hours.
In the present invention, by the masterbatch and remaining silane grafted polyethylene, organic peroxide crosslinking agent, uvioresistant
Aging auxiliary agent and antioxidant mixing, can by obtained mixed material melting extrusion, press mold sizing, cooling and maturation process
So that effective filling of the cross-linked polymeric of silane grafted polyethylene and various auxiliary agents is effectively ensured, so as to which mechanical property and electricity be made
The grafted polyethylene cross linking membrane of excellent insulation performance.The result of the embodiment of the present invention shows, grafted polyethylene provided by the invention
Crosslinking film thickness is 0.3 ± 0.05mm, tensile strength>45MPa, elongation at break>100%, longitudinal contraction rate<2.0%, laterally
Shrinkage factor<1.0%, specific insulation>3×1015Ω·cm。
The invention provides preparation side described in grafted polyethylene cross linking membrane described in above-mentioned technical proposal or above-mentioned technical proposal
Application of the grafted polyethylene cross linking membrane that method obtains in back panel of solar photovoltaic module.Specifically, by the grafted polyethylene
Cross linking membrane is used as the internal surface layer of back panel of solar photovoltaic module, and fluorine-containing outer coversheet is compound prepares the fluorine-containing backboard of one side.
Grafted polyethylene cross linking membrane provided by the invention and its preparation method and application is carried out with reference to embodiment detailed
Thin explanation, but they can not be interpreted as limiting the scope of the present invention.
Embodiment 1
1) in parts by weight, 11.5 parts of titanium dioxide is mixed with 12 parts of silane grafted polyethylene, under the conditions of 150 DEG C
Melting extrusion, pelletizing, cooling, obtain the titanium dioxide masterbatch that particle diameter is 2~5mm；
2) by step 1) the titanium dioxide masterbatch and remaining 73 parts of silane grafted polyethylenes, 1.5 part 2,5- dimethyl -2,
5- di-tert-butyl peroxides hexane, 0.25 part of 2-hydroxy-4-n-octoxybenzophenone, 0.25 part of 2- (tertiary fourth of 2'- hydroxyls -3'-
Base -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles and 0.75 part of four [β-(3', 5'- di-t-butyl -4'- hydroxy phenyls) propionic acid
Pentaerythritol ester, 0.75 part of phosphorous acid three (2,4- di-tert-butyl-phenyl) ester mixing, the mixed material melting extrusion that will be obtained, institute
Temperature is increased to 170 DEG C from 100 DEG C during stating melting extrusion；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 48 at a temperature of 65 DEG C
Hour, obtain grafted polyethylene cross linking membrane.
The mechanical property and electrical insulation capability of gained grafted polyethylene cross linking membrane are tested, result of the test is shown in Table 1.
Embodiment 2
1) in parts by weight, 8.5 parts of titanium dioxide is mixed with 10 parts of silane grafted polyethylene, under the conditions of 220 DEG C
Melting extrusion, pelletizing, cooling, obtain the titanium dioxide masterbatch that particle diameter is 2~5mm；By 8.5 parts of nano silicon and 10 parts
Silane grafted polyethylene mixes, the melting extrusion under the conditions of 220 DEG C, pelletizing, cooling, obtains the nano-silica that particle diameter is 2~5mm
SiClx masterbatch；
2) by two kinds of masterbatch of the step 1) titanium dioxide and nano silicon and remaining 60 parts of silane grafted polyethylenes,
0.5 part of 2,5- dimethyl -2,5- di-tert-butyl peroxides hexane, 0.5 part of cumyl t-butyl peroxide, 0.5 part of poly- [[6-
[(1,1,3,3- tetramethyl butyls) amino]-s- triazine -2,4- diyls]-[(2,2,6,6- tetramethyl -4- piperidyls) imido
Base] -1,6- dihexyls-[(2,2,6,6- tetramethyl -4- piperidyls) imido] and 0.75 part four [β-(3', 5'- di-t-butyl -
4'- hydroxy phenyls) propionate, the mixing of 0.75 part of phosphorous acid three (2,4- di-tert-butyl-phenyl) ester, it is mixed by what is obtained
Compound material melting extrusion, temperature is increased to 195 DEG C from 100 DEG C during the melting extrusion；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 45 at a temperature of 85 DEG C
Hour, obtain grafted polyethylene cross linking membrane.
The mechanical property and electrical insulation capability of gained grafted polyethylene cross linking membrane are tested, result of the test is shown in Table 1.
Embodiment 3
1) in parts by weight, 11.5 parts of titanium dioxide is mixed with 11.5 parts of silane grafted polyethylene, in 160 DEG C of conditions
Lower melting extrusion, pelletizing, cooling, obtain the titanium dioxide masterbatch that particle diameter is 2~5mm；By 11.5 parts of nano silicon with
11.5 parts of silane grafted polyethylene mixing, the melting extrusion under the conditions of 160 DEG C, pelletizing, cooling, it is 2~5mm's to obtain particle diameter
Nanometer titanium dioxide silicon original material；
2) by two kinds of masterbatch of the step 1) titanium dioxide and nano silicon and remaining 52 parts of silane grafted polyethylenes,
0.5 part of 2,5- dimethyl -2,5- di-tert-butyl peroxides hexane, 0.2 part of 2-hydroxy-4-n-octoxybenzophenone and 0.65
Four [β-(3', 5'- di-t-butyl -4'- hydroxy phenyls) propionate, 0.65 part of (2,4- di-t-butyl of phosphorous acid three of part
Phenyl) ester mixing, the mixed material melting extrusion that will be obtained, temperature is increased to 180 from 100 DEG C during the melting extrusion
℃；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 72 at a temperature of 70 DEG C
Hour, obtain grafted polyethylene cross linking membrane.
The mechanical property and electrical insulation capability of gained grafted polyethylene cross linking membrane are tested, result of the test is shown in Table 1.
Embodiment 4
1) in parts by weight, 13.5 parts of titanium dioxide is mixed with 13.5 parts of silane grafted polyethylene, in 200 DEG C of conditions
Lower melting extrusion, pelletizing, cooling, obtain the titanium dioxide masterbatch that particle diameter is 2~5mm；By 13.5 parts of nano silicon with
13.5 parts of silane grafted polyethylene mixing, the melting extrusion under the conditions of 200 DEG C, pelletizing, cooling, it is 2~5mm's to obtain particle diameter
Nanometer titanium dioxide silicon original material；
2) by two kinds of masterbatch of the step 1) titanium dioxide and nano silicon and remaining 43 parts of silane grafted polyethylenes,
0.75 part of 2,5- dimethyl -2,5- di-tert-butyl peroxides hexane, 0.75 part of cumyl t-butyl peroxide, 0.5 part of 2- (2'-
Hydroxyl -3'- the tert-butyl group -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles and 0.5 part of four [β-(3', 5'- di-t-butyl -4'- hydroxyls
Base phenyl) propionate, the mixing of 0.5 part of phosphorous acid three (2,4- di-tert-butyl-phenyl) ester, the mixed material that will be obtained
Melting extrusion, temperature is increased to 190 DEG C from 100 DEG C during the melting extrusion；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 60 at a temperature of 80 DEG C
Hour, obtain grafted polyethylene cross linking membrane.
The mechanical property and electrical insulation capability of gained grafted polyethylene cross linking membrane are tested, result of the test is shown in Table 1.
Embodiment 5
1) in parts by weight, 8 parts of titanium dioxide is mixed with 9 parts of silane grafted polyethylene, melted under the conditions of 180 DEG C
Extrusion, pelletizing, cooling, obtain the titanium dioxide masterbatch that particle diameter is 2~5mm；8 parts of nano silicon is connect with 9 parts of silane
Branch polyethylene mixing, the melting extrusion under the conditions of 180 DEG C, pelletizing, cooling, it is female to obtain the nano silicon that particle diameter is 2~5mm
Material；
2) by two kinds of masterbatch of the step 1) titanium dioxide and nano silicon and remaining 64 parts of silane grafted polyethylenes,
1.5 parts of 2,5- dimethyl -2,5- di-tert-butyl peroxides hexanes, 0.1 part of 2-hydroxy-4-n-octoxybenzophenone, 0.1 part of 2-
(the 2'- hydroxyl -3'- tert-butyl group -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles, 0.1 part of poly- [[6- [(1,1,3,3- tetramethyl fourth
Base) amino]-s- triazine -2,4- diyls]-[(2,2,6,6- tetramethyl -4- piperidyls) imino group] -1,6- dihexyls-[(2,2,
6,6- tetramethyl -4- piperidyls) imido] and 0.1 part of four [β-(3', 5'- di-t-butyl -4'- hydroxy phenyls) propionic acid Ji Wusi
Alcohol ester, 0.1 part of phosphorous acid three (2,4- di-tert-butyl-phenyl) ester mixing, the mixed material melting extrusion that will be obtained, the melting
Temperature is increased to 175 DEG C from 100 DEG C during extrusion；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 70 at a temperature of 75 DEG C
Hour, obtain grafted polyethylene cross linking membrane.
The mechanical property and electrical insulation capability of gained grafted polyethylene cross linking membrane are tested, result of the test is shown in Table 1.
The performance test results of grafted polyethylene cross linking membrane prepared by the embodiment 1~5 of table 1
Data in table 1 can be seen that grafted polyethylene cross linking membrane provided by the invention thickness be 0.3 ±
During 0.05mm, tensile strength>45MPa, elongation at break>100%, longitudinal contraction rate<2.0%, lateral shrinkage<1.0%, body
Product resistivity>3×1015Ω cm, illustrate that grafted polyethylene cross linking membrane provided by the invention possesses excellent mechanical property and electricity
Insulating properties.
Embodiment 6
The grafted polyethylene cross linking membrane that embodiment 1~5 is obtained, the internal surface layer as back panel of solar photovoltaic module, point
It is not compound with fluorine-containing outer coversheet, the fluorine-containing backboard of one side is made respectively.
The mechanical property and electrical insulation capability of the fluorine-containing backboard of gained one side are tested, result of the test is shown in Table 2.
Comparative example 1
It will be carried on the back with the fluorine-containing surface layer of grafted polyethylene cross linking membrane specification identical described in embodiment 6 as solar photovoltaic assembly
The internal surface layer of plate, it is compound with the fluorine-containing outer coversheet of equivalent specifications described in embodiment 6, double-side fluorine backboard is made.
The mechanical property and electrical insulation capability of gained double-side fluorine backboard are tested, result of the test is shown in Table 2.
The fluorine-containing backboard of one side that the gained grafted polyethylene cross linking membrane of 2 embodiment of table 1~5 is prepared respectively and contrast
The performance test results of double-side fluorine backboard described in example 1
Note：National regulations refer to GB/T 31034-2014《Crystalline silicon solar cell modules insulating back panel》.
Data in table 2 can be seen that grafted polyethylene cross linking membrane provided by the invention and be used as photovoltaic group
The internal surface layer of part backboard, it is compound with fluorine-containing outer coversheet, mechanical property and electrical insulation capability can be made and be mutually equal to double-side fluorine backboard
The beautiful fluorine-containing backboard of one side, and meet GB/T 31034-2014《Crystalline silicon solar cell modules insulating back panel》Requirement.
As seen from the above embodiment, grafted polyethylene crosslinking film dynamic performance provided by the invention, electrical insulation capability are good,
And grafted polyethylene provided by the invention crosslinking membrane preparation method is simple, cost is cheap, is easy to large-scale production.The present invention is carried
The grafted polyethylene cross linking membrane of confession is used as the internal surface layer of back panel of solar photovoltaic module, compound with fluorine-containing outer coversheet, and power can be made
The fluorine-containing backboard of one side that performance and electrical insulation capability compare favourably with double-side fluorine backboard is learned, and meets GB/T 31034-2014《It is brilliant
Body silicon solar cell component insulating back panel》Requirement.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of grafted polyethylene cross linking membrane, include the component of following parts by weight：70~85 parts of silane grafted polyethylene, white nothing
10~27 parts of machine filler, 0.5~1.5 part of organic peroxide crosslinking agent, 0.2~0.5 part of anti-ultraviolet ageing auxiliary agent, antioxidant
0.2~1.5 part.
2. grafted polyethylene cross linking membrane according to claim 1, it is characterised in that the organic peroxide crosslinking agent is
2,5- dimethyl -2,5- di-tert-butyl peroxides hexane and/or cumyl t-butyl peroxide.
3. grafted polyethylene cross linking membrane according to claim 1, it is characterised in that the white inorganic filler includes titanium white
Powder, the particle diameter of the titanium dioxide is 1~100 μm.
4. grafted polyethylene cross linking membrane according to claim 3, it is characterised in that the white inorganic filler also includes receiving
Rice silica, the particle diameter of the nano silicon is 1~100nm；The parts by weight of the titanium dioxide and nano silicon
Number is than being 1:1.
5. grafted polyethylene cross linking membrane according to claim 1, it is characterised in that the anti-ultraviolet ageing auxiliary agent is hexichol
One or more mixtures in three kinds of ketone class, benzotriazole, hindered amines anti-ultraviolet ageing auxiliary agents.
6. grafted polyethylene cross linking membrane according to claim 5, it is characterised in that the benzophenone anti-ultraviolet ageing
Auxiliary agent is 2-hydroxy-4-n-octoxybenzophenone, and the benzotriazole anti-ultraviolet ageing auxiliary agent is 2- (2'- hydroxyls -3'-
The tert-butyl group -5'- aminomethyl phenyls) -5- chlorinated benzotriazoles, the hindered amines anti-ultraviolet ageing auxiliary agent for it is poly- [[6- [(1,1,3,
3- tetramethyl butyls) amino]-s- triazine -2,4- diyls] and-[(2,2,6,6- tetramethyl -4- piperidyls) imino group] -1,6- oneself
Diyl-[(2,2,6,6- tetramethyl -4- piperidyls) imido].
7. grafted polyethylene cross linking membrane according to claim 1, it is characterised in that the antioxidant include four [β-(3',
5'- di-t-butyl -4'- hydroxy phenyls) propionate and phosphorous acid three (2,4- di-tert-butyl-phenyls) ester.
8. the preparation method of the grafted polyethylene cross linking membrane described in any one of claim 1~7, comprises the following steps：
1) every kind of white inorganic filler is mixed with part silane grafted polyethylene in raw material respectively, under the conditions of 150~220 DEG C
Melting extrusion, pelletizing, cooling, respectively obtain the masterbatch that particle diameter is 2~5mm；
2) the step 1) masterbatch and remaining silane grafted polyethylene, organic peroxide crosslinking agent, anti-ultraviolet ageing are helped
Agent and antioxidant mixing, the mixed material melting extrusion that will be obtained, temperature raises from 100 DEG C during the melting extrusion
To 170~195 DEG C；
3) material by the step 2) melting extrusion is shaped through press mold, cooling, the maturation process 45 at a temperature of 65~85 DEG C
~72 hours, obtain grafted polyethylene cross linking membrane.
9. the preparation method of grafted polyethylene cross linking membrane according to claim 8, it is characterised in that in every kind of masterbatch
The ratio of weight and number of white inorganic filler and silane grafted polyethylene is 1:1~1.2.
10. any one of grafted polyethylene cross linking membrane or claim 8~9 described in any one of claim 1~7 the preparation side
Application of the grafted polyethylene cross linking membrane that method obtains in back panel of solar photovoltaic module.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738275A (en) * | 2011-04-12 | 2012-10-17 | 苏州尚善新材料科技有限公司 | Solar cell assembly backplane and preparation method thereof |
| CN103897322A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Resin composition and solar backboard prepared from same |
| CN104112785A (en) * | 2014-07-31 | 2014-10-22 | 明冠新材料股份有限公司 | Film used for synergistic type solar cell back plate and preparation method thereof |
| CN105006497A (en) * | 2015-06-30 | 2015-10-28 | 杭州福斯特光伏材料股份有限公司 | High-voltage backboard for crystal silicon element packaging |
-
2017
- 2017-10-25 CN CN201711014160.1A patent/CN107629339B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738275A (en) * | 2011-04-12 | 2012-10-17 | 苏州尚善新材料科技有限公司 | Solar cell assembly backplane and preparation method thereof |
| CN103897322A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Resin composition and solar backboard prepared from same |
| CN104112785A (en) * | 2014-07-31 | 2014-10-22 | 明冠新材料股份有限公司 | Film used for synergistic type solar cell back plate and preparation method thereof |
| CN105006497A (en) * | 2015-06-30 | 2015-10-28 | 杭州福斯特光伏材料股份有限公司 | High-voltage backboard for crystal silicon element packaging |
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