CN205944113U - Novel solar cell back sheet and subassembly thereof - Google Patents

Abstract

The utility model relates to a novel solar cell back sheet and subassembly thereof. The utility model discloses a novel solar cell back sheet, including the substrate layer to and including setting up containing fluoride coat and setting up in the bonding glue film and the modified polyolefin layer of substrate layer another side in arbitrary substrate layer. The beneficial effects are that: the utility model discloses a novel solar cell back sheet has high weatherability, high wearing feature, separating nature of high resistant, and low cost, its aqueous vapor transmissivity are less than 1.0gm2. Day, compare in traditional solar cell back sheet, and its manufacturing cost can reduce more than 10%.

Description

A kind of novel solar battery backboard and its assembly

Technical field

This utility model is related to area of solar cell, particularly to a kind of novel solar battery backboard and its assembly.

Background technology

The layer structure of typically one superposition of solar module, is followed successively by glassy layer, EVA from sensitive surface to the back side Sealant, solar battery sheet, EVA sealant and solar cell backboard.Solar cell backboard is to be only second to electricity in assembly The pith of pond piece, its Main Function is to improve the overall mechanical strength of assembly and by the weatherability of itself, barrier With insulating properties, cell piece is played a protective role.For the ensure assembly at least long-term reliability of 25 years, the globality to backboard Very high requirement can be proposed, make the design of backboard and production also become complicated, virtually improve manufacturing cost.But, generation Assembly price-cut trend in the range of boundary has also impacted backboard industry, therefore how to obtain cost performance high backboard and industry is proposed Challenge.The scheme in a large number backboard being improved has been emerged it is intended to reach this purpose in prior art.

For example, Chinese Patent Application No. is CN201220644624.3, and date of publication is August in 2013 7, and publication No. is A kind of one kind with PET as base material, obtaining is disclosed using the United Technologies of coating and laminating adhesive in the patent of CN203110453 U Backboard.Coating therein is referred to as weathering resistance coatings, forms the air surface of backboard, is by politef, trifluoro-ethylene or propylene The base membrane layer that acid resin is constituted.And being used for compound film is then pvdf membrane or PVF film, and realized viscous with PET by adhesive Close, form the EVA face of backboard.Although this backboard two sides is fluorine-containing, he is not equally well positioned to meet high durable (especially pvdf membrane Because PMMA and the other elastomers adding in process are so as to resistance to ag(e)ing substantially reduces), high-barrier (especially water Vapor permeability) problem, therefore cannot guarantee that the long-term reliability of assembly.

Chinese Patent Application No. is CN200920118597.4, March 24 2010 publication date, Publication No. Disclose in the patent of CN201430145 Y a with PET as base material, with binding agent, PVF is bonded in PET positive and negative gained Backboard.Although this backboard is also double-side fluorine material, two-layer PVF is all bonded with PET by adhesive, in the reality of assembly There is very big delamination risk in application, existing adhesive it is difficult to ensure that long bonding effect, once adhesive aging, Delamination, aqueous vapor is easy to permeate by boundary layer, and makes PET water solution quickly, so that cell piece output is declined.Therefore, so Although two-sided gluing backboard two sides all employ the PVF film of high durable, the vulnerability due to adhesive leads to entirely The reliability decrease of backboard is it is also difficult to obtain the assembly of high reliability.

From this, the backboard of high performance-price ratio to be obtained remains the target that industry is constantly pursued.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of high-weatherability, high-wearing feature, high resistant Every property, the novel solar battery backboard of low cost and its assembly.The substrate layer of mechanical strength selected by this backboard, by spy Functional fluoropolymer coating is incorporated into its surface by different technique, forms air surface so as to have weatherability and wearability, and permissible These performances are regulated and controled by the change of thickness and condition of cure, air surface does not use bonding glue-line, reduce bonded adhesives aging, The risk that delamination brings.By gluing compound technology, the another side that modified polyolefin is attached to substrate layer is increased further The mechanical strength of backboard, barrier and insulating properties.The thickness of substrate layer and modified polyolefin hydrocarbon layers can change and complementary, reaches control Backboard gross thickness processed, the purpose of barrier, insulating properties and cost.The more importantly encapsulating material of improved polyalkene and cell piece EVA has good bonding force, reduces backboard risk detached with cell piece in use, improves for a long time may be used of assembly By property.

A kind of novel solar battery backboard that this utility model provides, its technical scheme is：

A kind of novel solar battery backboard, including substrate layer, and includes being arranged at the fluorine-containing painting of substrate layer any surface Layer and the bonding glue-line and the modified polyolefin hydrocarbon layers that are arranged at substrate layer another side, the thickness of described modified polyolefin hydrocarbon layers is contained with described The ratio of the thickness of fluorine coating is 0.1～480.

Wherein, modified polyolefin hydrocarbon layers include any one in PE, PP, POE or EVA or appoint several, modified polyolefin hydrocarbon layers It is the polyolefin layer through chemical modification, the polyolefin layer through physical modification or through the co-extruded modified polyene of physics Hydrocarbon layers.

Wherein, the surface of fluorine-containing coat has polarity unimolecule grafting layer.

Wherein, the thickness of backboard is 50 μm～850 μm, and the thickness of fluorine-containing coat is 1 μm～100 μm, the thickness of substrate layer For 38 μm～400 μm, the thickness of modified polyolefin hydrocarbon layers is 10 μm～500 μm, and the thickness of described bonding glue-line is 1 μm～50 μm.

Wherein, substrate layer is pet layer, PBT layer or PEN layer, the bonded adhesives in bonding glue-line be polyurethane, epoxy resin or One of acrylic acid seriess adhesive or appoint several.

Wherein, the surface of substrate layer is through plasma activation and etching processing, plasma treated after base material layer surface Containing active group, active group includes-OH ,-NH₂Or-COOH.

Wherein, fluorine-containing coat is functional fluorine-bearing coating, functional fluorine-bearing coating include fluorothene, difluoroethylene, three One of fluorothene or tetrafluoroethene or appoint several.

Wherein, it is provided with fluorine-containing coat between substrate layer and bonding glue-line.

Wherein, bonding glue-line is hot melt adhesive layer.

Wherein, modified polyolefin hydrocarbon layers are that the polymer that obtains of POE/ fluorine material blending and modifying, PE/EVA blending and modifying obtain Polymer, the polymer that obtains of PET/ solubilizing agent/PP blending and modifying, PP/POE/PE blending and modifying obtain polymer, Polymer that polymer that HDPE/PP/EPDM blending and modifying obtains, PP/EVA blending and modifying obtain, PP/PE/EPR blending and modifying Polymer that the polymer that obtains, PP/SBS/EVA blending and modifying obtain or the polymerization that PP/HDPE/SBS blending and modifying obtains Thing.

Wherein, described modified polyolefin hydrocarbon layers are the polymer that POE/ fluorine material blending and modifying obtains, the wherein matter of fluorine material Amount percentage ratio is 5～20%；

Or described modified polyolefin hydrocarbon layers are the polymer that PE/EVA blending and modifying obtains, the weight ratio of wherein PE and EVA For 5-20: 80-95；

Or described modified polyolefin hydrocarbon layers are the polymer that PET/ solubilizing agent/PP blending and modifying obtains, wherein solubilizing agent Mass percent is 5-15%, and the mass percent of PET is 20-25%；

Or described modified polyolefin hydrocarbon layers are the polymer that PP/POE/PE blending and modifying obtains, wherein PP, POE and PE Weight is than for 60-90: 5-20: 5-20；

Or described modified polyolefin hydrocarbon layers are the polymer that HDPE/PP/EPDM blending and modifying obtains, wherein HDPE, PP with The weight of EPDM is than for 60-90: 9-30: 1-10；

Or described modified polyolefin hydrocarbon layers are the polymer that PP/EVA blending and modifying obtains, the weight ratio of wherein PP and EVA For 5-20: 80-95；

Or described modified polyolefin hydrocarbon layers are the polymer that PP/PE/EPR blending and modifying obtains, wherein PP, PE and EPR Weight is than for 90-110: 1-3: 5-15；

Or described modified polyolefin hydrocarbon layers are the polymer that PP/SBS/EVA blending and modifying obtains, the weight of wherein EVA and SBS Amount ratio is for 2-1: 1；

Or described modified polyolefin hydrocarbon layers are the polymer that PP/HDPE/SBS blending and modifying obtains, wherein PP, HDPE with The weight of SBS is than for 5-7: 2-4: 1-2.

This utility model provides a kind of solar module, including the front layer material from top to bottom setting gradually, Encapsulating material, solaode, encapsulating material, backboard, backboard is a kind of above-mentioned novel solar battery backboard.

This utility model provides a kind of preparation method of novel solar battery backboard, comprises the following steps：

(1), two surfaces of substrate layer are carried out plasma surface treatment；

(2), using casting technology, fluoro-containing coating is cast to the surface of the substrate layer after Surface Treatment with Plasma, Gu Fluorine-containing coat is obtained after change；

(3), by gluing, the tape casting or dry type pressure sintering, improved polyalkene is compounded in another surface of substrate layer.

Wherein, in step (2), using polar molecule as precursor, with PECVD technique, the surface of fluorine-containing coat is connect Branch is processed, and forms polarity unimolecule grafting layer.

Wherein, the curing mode in step (2) is microwave curing, and the temperature of microwave curing is 120 DEG C～160 DEG C, the time For 50 seconds～500 seconds.

Wherein, the fluoro-containing coating in step (2) is by the functional polymer fluororesin of active group, initiator, solidification Agent, auxiliary agent, filler allotment form, functional polymer fluororesin is fluorothene, difluoroethylene, trifluoro-ethylene or tetrafluoroethene and its The product that its function monomer containing active group obtains after carrying out copolymerization, active group includes hydroxyl, carboxyl, amino, initiator Refer to decompose and discharge the nitrine class of free radical in the presence of heat, light, radiation or microwave or peroxide is organic Molecule；Firming agent be containing NCO, epoxy radicals, amino resins polyfunctional group firming agent.

A kind of novel solar battery backboard that this utility model provides compared with prior art has the advantage that：

Novel solar battery backboard of the present utility model has high-weatherability, high-wearing feature, high barrier, low cost, Its moisture permeability is less than 1.0g/m².day, it is compared to traditional solar cell backboard, its production cost can reduce More than 10%.

1), pass through corona treatment base material layer surface, so that base material layer surface is cleaned, remove substrate layer manufacture process The oils and fatss of middle remained on surface, eliminate weak interaction layer, so that the bonding force between fluorine-containing coat and substrate layer is greatly improved.Deng Also base material layer surface can be activated while plasma etching base material layer surface, make surface be rich in-OH ,-NH2 ,-COOH etc. Active group, these active groups can participate in the curing cross-linking reaction of coating, make the perfect integration of fluorine-containing coat and substrate layer, obtain Coating to the integration of film glue.

2), the polarity unimolecule of grafting is grafted the surface energy that layer can be effectively increased backboard air surface fluorine-containing coat, overcomes Fluorine material surface energy is low, the shortcoming of bad adhesion, makes fluorine-containing coat that the bonding force of assembly junction box is improved, effectively keeps away Exempt from coming off of rosette.

3), the introducing of improved polyalkene further enhancing backboard to the barrier of aqueous vapor and insulating properties, and modified poly- Alkene can greatly improve with the cohesive of encapsulating material EVA, reduces cell piece risk detached with backboard.Improved polyalkene Modification mode is more flexible, can be chemical modification (chemical graft and reactively blending), physical modification (mechanical blending) or two The combination planted.The lead-in mode of improved polyalkene is more flexible, preparation process is simple, can be gluing dosage form or No gel curtain coating type, be can also be and be combined by heat curing-type glue hot pressing dry type.

4), while, reducing production cost, backboard of the present utility model fully incorporates solar components to backboard Various requirement, for example docking line box cohesive (polarity unimolecule be grafted layer introducing can greatly improve this performance), right (thickness and crosslinking with fluorine-containing coat are close for the cohesive (modified polyolefin hydrocarbon layers can greatly improve this performance) of EVA, weatherability Degree), wearability (thickness of fluorine-containing coat and crosslink density), barrier and the insulating properties (total thickness of pet layer and modified polyolefin hydrocarbon layers Degree, the composition of modifying agent polyolefin layer).The various index parameter of backboard has controllability, by controlling fluorine-containing coat thickness, base The thickness of the thickness of material layer and modified polyolefin hydrocarbon layers, to regulate and control combination property and the production cost of whole backboard, meets assembly not With the particular/special requirement to backboard under environment, obtain the very high backboard of cost performance.

5), production technology motility is high, backboard performance is controlled, adjustable, it is extensive to be easily achieved, serialization and automatic metaplasia Produce, improve production efficiency.

Brief description

Fig. 1 is a kind of novel solar battery backboard structural representation of this utility model embodiment 1.

Fig. 2 is a kind of novel solar battery backboard structural representation of this utility model embodiment 2.

Fig. 3 is a kind of novel solar battery backboard structural representation of this utility model embodiment 3.

Fig. 4 is a kind of novel solar battery backboard structural representation of this utility model embodiment 4.

Specific embodiment

Below in conjunction with embodiment and accompanying drawing, this utility model is described in detail it should be pointed out that described Embodiment be intended merely to facilitate to understanding of the present utility model, and any restriction effect is not played to it.

Shown in Figure 1, a kind of novel solar battery backboard that this utility model provides, including substrate layer, and bag Include the fluorine-containing coat being arranged at substrate layer any surface and the bonding glue-line and the modified polyolefin hydrocarbon layers that are arranged at substrate layer another side.Change Property polyolefin layer the ratio of the thickness of thickness and fluorine-containing coat be 0.1～480, concrete numerical value can select 300,100,50 or 10.The substrate layer of mechanical strength selected by backboard of the present utility model, and functional fluoropolymer coating is incorporated into its surface, is formed empty Gas face is so as to have weatherability and wearability, and can regulate and control these performances by the change of thickness and condition of cure, empty Gas face does not use bonding glue-line, reduces the risk that bonded adhesives is aging, delamination brings.Will be modified by gluing compound technology The another side that polyolefin is attached to substrate layer increases mechanical strength, barrier and the insulating properties of backboard further.Improved polyalkene There is good bonding force with the encapsulating material EVA of cell piece, reduce backboard risk detached with cell piece in use, Improve the long-term reliability of assembly.

Preferably, the surface of fluorine-containing coat includes polarity unimolecule grafting layer (air surface), and its composition has pole for all Property molecule, using plasma surface modification technique introduce unimolecule grafting layer, improve the bonding between backboard and rosette Power.

The thickness of this utility model dorsulum is 50 μm～800 μm, and concrete numerical value can select 300 μm, 350 μm, 400 μ m；The thickness of substrate layer is 38 μm～400 μm, and concrete numerical value can select 125 μm, 250 μm, 350 μm, and substrate layer is that PET is (poly- Ethylene glycol terephthalate) layer, modified pet layer or other polyester layer, polyester layer can be PBT (poly terephthalic acid fourth Diol ester) or the modifier of PEN (PEN) or non-modified thing.The restriction of above-mentioned thickness characteristics can be abundant Play mechanical strength, barrier and the insulating properties of substrate layer.The surface of substrate layer through plasma activation and etching processing, through etc. Base material layer surface after ion processing is rich in active group, and active group includes-OH ,-NH₂One of or-COOH.Using etc. Ion technology is surface-treated to substrate layer, while cleaning base material layer surface organic pollution, base material layer surface is carved Lose and activate, strengthen the cementability with other materials, make fluorine-containing coat and substrate layer perfection bonding；By compound film technology by modification Polyolefin is compound in the EVA face of the another side composition backboard of substrate layer, and the barrier improving backboard further improves backboard simultaneously Bonding force and encapsulating material EVA between.

The thickness of bonding glue-line is 1 μm～50 μm, and the bonded adhesives in bonding glue-line can select one-component or double-component Polyurethane, epoxy resin or acrylic acid seriess adhesive.Bonding glue-line can be hot melt adhesive layer, and the curing mode of hot melt adhesive layer is heat One of solidification, photocuring, radiation curing, microwave curing or appoint several.Hot melt adhesive layer preferred heat curing-type hot melt adhesive layer.

Fluorine-containing coat is functional fluorine-bearing coating, and functional fluorine-bearing coating is that fluoro-containing coating obtains after solidification, fluorine-containing Coating is by the functional polymer fluororesin of active group, initiator, firming agent, auxiliary agent, filler (inorganic and organic filler) Allotment forms, and the thickness of fluorine-containing coat is micron order, can select 1-100 μm.Functional polymer fluororesin is fluorothene, difluoro Ethylene, trifluoro-ethylene or tetrafluoroethene carry out the product after copolymerization with other function monomers containing active group.Functional fluorine-bearing One of fluorothene, difluoroethylene, trifluoro-ethylene or tetrafluoroethene can be included in coating or appoint several, active group bag Include hydroxyl, carboxyl, amino etc. can reactive group, function monomer refers to organic point of the polymerizable containing unsaturated bond (double or triple bonds) Son, copolymerization refers to the process being changed into macromole from small molecule being caused from initiator, such as free radical type copolymerization, ion-type copolymerization or Atom transfer radical polymerization etc..Initiator refers to can decompose in the presence of heat, light, radiation or microwave and discharges free radical Nitrine class or peroxide organic molecule.Firming agent be containing NCO, epoxy radicals, amino resins multifunctional briquetting Agent, is cured as one of heat cure, radiation curing, microwave curing or photocuring or appoints several.Fluorine second in this utility model Alkene, difluoroethylene, trifluoro-ethylene or tetrafluoroethene refer to respectively containing a fluorine atom, two fluorine atoms, three fluorine atoms or The fluorine-containing ethylene compounds of four fluorine atoms.

Improved polyalkene is through modified PE (polyethylene), PP (polypropylene), POE (polyolefin elastomer (Polyolefin elastomer)) or one of EVA (polyethylene-polyvinyl acetate copolymer) or appoint several, PE is (poly- Ethylene) include LDPE (Low Density Polyethylene) and HDPE (high density polyethylene (HDPE))；Improved polyalkene can be uniform copolymer, Blend, homopolymer or graft product, can be single layer structure or multi-layer co-extruded structure, and method of modifying can be chemical modification (chemical graft or reactively blending), physical modification (mechanical blending or mechanical co-extrusion) and combination.Modified polyolefin hydrocarbon layers Thickness be 10-500 μm.

In lot of experiments, this utility model, modified polyolefin hydrocarbon layers can have following multiple choices embodiment：

The polymer that modified polyolefin hydrocarbon layers obtain for POE/ fluorine material blending and modifying, the mass percent of fluorine material is 5～ 20%, fluorine material can select politef, polytrifluorochloroethylene etc., and this kind of polymer has weatherability and water vapor rejection concurrently Property.

Or the weight of the polymer that modified polyolefin hydrocarbon layers obtain for PE/EVA blending and modifying, wherein PE and EVA is than for 5- The weight of 20: 80-95, preferably PE and EVA, than for 10: 90, is blended the polymer combination property obtaining under the conditions of this ratio Good.The compatibility of PE and EVA very well, can improve the flexibility of PE and environmental stress crack resistance with EVA blending and modifying, improves The elasticity of PE is so as to permanent deformation is little.This kind of modified polyolefin hydrocarbon layers are arranged on the EVA face of backboard, fine with EVA bonding force.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PET/ solubilizing agent/PP blending and modifying, the percent mass of solubilizing agent Ratio generally 5-15%, and PET in the mass percent in co-mixing system typically between 20-25%.PET can improve the strong of PP Degree, modulus, thermostability and case hardness, and PP can improve processing, impact, resisting environmental stress and cracking and the barrier property of PET.But The poor compatibility of PET and PP, so the polyethylene (PE-g-MAH) of maleic anhydride grafting or the poly- of maleic anhydride grafting will be added Propylene (PP-g-MAH) is as bulking agent.It is whole that this kind of modified polyolefin hydrocarbon layers can reduce holding or raising while substrate layer thickness The weatherability of individual backboard and barrier.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PP/POE/PE blending and modifying, the temperature of blending is 180-220 DEG C, preferably 200 DEG C, wherein, the weight of PP, POE and PE is than for 60-90: 5-20: 5-20, the preferably weight ratio of PP, POE and PE For 80: 10: 10.POE is excellent thermoplastic elastomer (TPE), has good toughening effect to PP, and PE then plays the work of bulking agent With.This kind of improved polyalkene can reduce the thickness of substrate layer, reduces the purpose of cost, improve the resistance of whole backboard simultaneously Every property and weatherability.The preferred HDPE of PE, HDPE play the effect of insertion, segmentation and refinement to the spherocrystal of PP, and the refinement of spherocrystal It is to obtain one of premise of good impact performance.

POE (polyolefin elastomer (Polyolefin elastomer)) is having relatively with metallocene as catalyst Narrow molecular mass distribution and the thermoplastic elastomer (TPE) of uniform short-chain branch distribution.The main performance of this elastomer is very prominent, Conventional elastomers are exceeded in very many performance indications.POE molecular structure is similar to ethylene propylene diene rubber (EPDM), therefore POE also can have the excellent properties such as ageing-resistant, resistance to ozone, resistance to ultraviolet, resistant to chemical media.Research is pointed out, with EPDM Toughened PP phase Than, either for common PP, copolymerization PP or High Flowability PP, the toughening effect of POE is better than EPDM, and bending moduluses And tensile strength reduction is little.The octene content impact toughening effect to PP for the POE in POE, with the increasing of octene content in POE Plus, the degree of crystallinity of POE, fusing point and density all reduce, and compliance increases, and the toughening effect of PP is improved.

Or the polymer that modified polyolefin hydrocarbon layers obtain for HDPE/PP/EPDM blending and modifying, the weight of HDPE, PP and EPDM Amount ratio is for 60-90: 9-30: 1-10, the preferably weight of HDPE, PP and EPDM ratio is for 70: 23: 8.Such polymer-modified toughness is relatively Good.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PP/EVA blending and modifying.The weight of wherein PP and EVA is than for 5- 20: 80-95, preferably PP and EVA weight than for 10: 90, be blended under the conditions of this ratio the polymer obtaining have concurrently good resistance to Time property and barrier.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PP/PE/EPR blending and modifying, PP, PE and EPR (EP rubbers) Weight than for 90-110: 1-3: 5-15, the preferably weight of PP, PE and EPR ratio for 100: 2: 8, is blended under the conditions of this ratio The polymer combination property obtaining is best.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PP/SBS/EVA blending and modifying, SBS (styrene-butadiene-benzene Ethylene block copolymer) collectively constitute toughener with EVA, when the consumption of toughener is less than 17%, the weight ratio of EVA and SBS During for 1: 1, preferably, when the consumption of toughener is more than 17%, the weight ratio of EVA and SBS is during for 2: 1, toughness reinforcing effect for toughening effect Really best.Wherein SBS is main toughener, and EVA is auxiliary toughener.

Or the polymer that modified polyolefin hydrocarbon layers obtain for PP/HDPE/SBS blending and modifying, wherein PP, HDPE and SBS Weight is than for 5-7: 2-4: 1-2, preferably the weight of PP, HDPE and SBS is than for 6: 3: 1.This kind of modified polyolefin hydrocarbon layers toughness, stretching Performance and good processability, softening point height (more than 100 DEG C).

Above-mentioned modified polyolefin hydrocarbon layers can be the polyolefin layer through chemical modification, the polyene through physical modification Hydrocarbon layers or through the co-extruded modified polyolefin layer of physics, the polyolefin layer of the preferred physical modification of this utility model or thing Manage co-extruded modified polyolefin layer.

Chemical modification refers to that adding modifying agent makes polyolefine material that the method for modifying (blending of grafting property) of graft reaction to occur, Or add the compound that chemical reaction can occur with polyolefine material, make the compound of interpolation and polyolefine material that chemistry to occur The method (reactively blending) of reaction.

Physical modification refers to add the compound that can be blended in polyolefine material that (compound of interpolation will not be with There is chemical reaction in polyolefine material), then mutually mixed the improved polyalkene that material extrusion obtains.

The co-extruded modified improved polyalkene referring to obtain after polyolefine material and other compound co-extrusions of physics.

Improved polyalkene can be homogeneous single layer structure or multi-layer co-extruded structure, and modified polyolefin can To be fluorine material it is also possible to be non-fluorine material.

This utility model additionally provides a kind of preparation method of novel solar battery backboard, comprises the following steps：

(1), by thickness be 38 μm to 400 μm, fabric width be 1 meter to 4 meters base material layer coiled material through online plasma body surface Face processes (corona)；The linear velocity of plasma surface treatment is 5 to 100 ms/min；

(2), fluorine-containing containing reactive F resin, initiator, levelling agent, firming agent, filler and auxiliary agent by modulating Coating is cast the surface (one side or double that tangent line paint-on technique is equably cast to the substrate layer after Surface Treatment with Plasma Face), then carry out microwave curing process, obtain the fluorine-containing coat that thickness is 1 to 100 μm；The temperature of cured arrives for 120 DEG C 160 DEG C, the time be 50 seconds to 500 seconds；Using polar molecule as precursor, with PECVD, (PECVD sinks Area method) technology the fluorine-containing coat of air surface is carried out surface grafting modify make its surface formed a layer thickness be EthylmercurichlorendimideTo receiving The polarity unimolecule grafting layer of rice (nm).

(3), by gluing, the tape casting or dry type pressure sintering, improved polyalkene is compounded in another surface of substrate layer； The step of gluing is, using casting technique, the bonding preparing in advance colloid is cast to the base material after corona treatment On layer, then improved polyalkene and substrate layer are carried out being combined, solidify and ripening；The tape casting is directly to be cast improved polyalkene On the substrate layer after corona treatment；Dry type pressure sintering is in attachment in advance in the manufacture process of improved polyalkene Then improved polyalkene is combined by one layer of hot melt adhesive with substrate layer, solid using heat cure, photocuring, radiation curing, microwave One of change or appoint that several to realize hot melt adhesive layer bonding with substrate layer.

Novel solar battery backboard of the present utility model has high durable, high abrasion, high-barrier, low cost, its aqueous vapor Transmitance is less than 1.0g/m².day, be compared to traditional solar cell backboard, its production cost can reduce by 10% with On.

Embodiment 1

Shown in Figure 1, the solar cell backboard structure of the present embodiment includes polarity list from air surface successively to EVA face Molecule grafting layer 1, fluorine-containing coat 2, substrate layer 3, bonding glue-line 4 and modified polyolefin hydrocarbon layers 5.The modified polyolefin hydrocarbon layers of the present embodiment 5 polymer obtaining for POE/ fluorine material blending and modifying, the mass percent of fluorine material is 5～40%, and fluorine material can select Politef, polytrifluorochloroethylene etc., this kind of polymer has weatherability and water vapor barrier property concurrently.Its moisture permeability is less than 0.8g/m².day, it is compared to traditional solar cell backboard, its production cost can reduce by more than 15%.

Embodiment 2

Shown in Figure 2, the solar cell backboard structure of the present embodiment includes polarity list from air surface successively to EVA face Molecule grafting layer 1, fluorine-containing coat 2, substrate layer 3, fluorine-containing coat 2, bonding glue-line 4 and modified polyolefin hydrocarbon layers 5.The changing of the present embodiment Property the polymer that obtains for PP/POE/PE blending and modifying of polyolefin layer 5, the temperature of blending is 180-220 DEG C, preferably 200 DEG C, its In, the weight of PP, POE and PE is than for 60-90: 5-20: 5-20, preferably the weight of PP, POE and PE is than for 80: 10: 10.POE is Excellent thermoplastic elastomer (TPE), has good toughening effect to PP, and PE then plays the effect of bulking agent.This kind of improved polyalkene The thickness of substrate layer can be reduced, reduce the purpose of cost, improve barrier and the weatherability of whole backboard simultaneously.This reality The moisture permeability applying the backboard of example is less than 0.8g/m².day, it is compared to traditional solar cell backboard, its production cost More than 13% can be reduced.

Embodiment 3

Shown in Figure 3, the solar cell backboard structure of the present embodiment includes polarity list from air surface successively to EVA face Molecule is grafted layer 1, fluorine-containing coat 2, substrate layer 3, hot melt adhesive layer 6 and modified polyolefin hydrocarbon layers 5, and the curing mode of hot melt adhesive layer 6 is One of heat cure, photocuring, radiation curing, microwave curing or appoint several.The modified polyolefin hydrocarbon layers of the present embodiment are PE/ The weight of the polymer that EVA blending and modifying obtains, wherein PE and EVA is than for 5-20: 80-95, preferably PE with the weight ratio of EVA are 10: 90, the polymer combination property that obtain is blended under the conditions of this ratio best.The compatibility of PE and EVA is very well, common with EVA Mixed modification can improve the flexibility of PE and environmental stress crack resistance, and the elasticity improving PE is so as to permanent deformation is little.This kind of change Property polyolefin layer is arranged on the EVA face of backboard, fine with EVA bonding force.The moisture permeability of the backboard of the present embodiment is less than 0.9g/m².day, it is compared to traditional solar cell backboard, its production cost can reduce by more than 14%.

Embodiment 4

Shown in Figure 4, the solar cell backboard structure of the present embodiment includes polarity list from air surface successively to EVA face Molecule grafting layer 1, fluorine-containing coat 2, substrate layer 3, fluorine-containing coat 2, hot melt adhesive layer 6 and modified polyolefin hydrocarbon layers 5, hot melt adhesive layer 6 Curing mode is one of heat cure, photocuring, radiation, microwave curing or appoints several.The modified polyolefin hydrocarbon layers 5 of the present embodiment The polymer obtaining for PP/EVA blending and modifying.The weight of wherein PP and EVA is than for 5-20: 80-95, preferably PP and EVA weight Than for 10: 90, the polymer that obtain is blended under the conditions of this ratio and has good weatherability and barrier concurrently.The back of the body of the present embodiment The moisture permeability of plate is less than 0.9g/m².day, it is compared to traditional solar cell backboard, its production cost can reduce More than 13%.

This utility model additionally provides a kind of solar module, including the front layer material from top to bottom setting gradually, Encapsulating material, solaode, encapsulating material, backboard, backboard is above-mentioned novel solar battery backboard.

Finally it should be noted that above example is only in order to illustrating the technical solution of the utility model, rather than to this reality With the restriction of novel protected scope, although having made to explain to this utility model with reference to preferred embodiment, this area general Lead to it will be appreciated by the skilled person that the technical solution of the utility model can be modified or equivalent, without deviating from this The spirit and scope of utility model technical scheme.

Claims (10)

1. a kind of novel solar battery backboard, including substrate layer it is characterised in that：Also include being arranged at substrate layer any surface Fluorine-containing coat and be arranged at bonding glue-line and the modified polyolefin hydrocarbon layers of substrate layer another side, the thickness of described modified polyolefin hydrocarbon layers with The ratio of the thickness of described fluorine-containing coat is 0.1～480.

2. a kind of novel solar battery backboard according to claim 1 it is characterised in that：In described modified polyolefin hydrocarbon layers Including any one in PE, PP, POE or EVA, described modified polyolefin hydrocarbon layers are through the polyolefin layer of chemical modification, through thing Manage the polyolefin layer of blending and modifying or through the co-extruded modified polyolefin layer of physics.

3. a kind of novel solar battery backboard according to claim 1 it is characterised in that：The surface of described fluorine-containing coat There is polarity unimolecule grafting layer.

4. a kind of novel solar battery backboard according to claim 1 it is characterised in that：The thickness of described backboard is 50 μm～850 μm, the thickness of described fluorine-containing coat is 1 μm～100 μm, and the thickness of described substrate layer is 38 μm～400 μm, described changes Property polyolefin layer thickness be 10 μm～500 μm, the thickness of described bonding glue-line is 1 μm～50 μm.

5. a kind of novel solar battery backboard according to claim 1 it is characterised in that：Described substrate layer be pet layer, PBT layer or PEN layer, the bonded adhesives in described bonding glue-line is one of polyurethane, epoxy resin or acrylic acid seriess adhesive.

6. a kind of novel solar battery backboard according to claim 1 it is characterised in that：The surface warp of described substrate layer Cross plasma activation and etching processing.

7. a kind of novel solar battery backboard according to claim 1 it is characterised in that：Described substrate layer is viscous with described Connect and between glue-line, be provided with fluorine-containing coat.

8. a kind of novel solar battery backboard according to claim 1 or 7 it is characterised in that：Described bonding glue-line is Hot melt adhesive layer.

9. a kind of novel solar battery backboard according to any one of claim 1～7 it is characterised in that：Described modification Polyolefin layer be the polymer that obtains of POE/ fluorine material blending and modifying, PE/EVA blending and modifying obtain polymer, PET/ solubilising Polymer that polymer that agent/PP blending and modifying obtains, PP/POE/PE blending and modifying obtain, HDPE/PP/EPDM blending and modifying Polymer that polymer that the polymer that obtains, PP/EVA blending and modifying obtain, PP/PE/EPR blending and modifying obtain, PP/SBS/ Polymer that EVA blending and modifying obtains or the polymer that PP/HDPE/SBS blending and modifying obtains.

10. a kind of solar module, including the front layer material from top to bottom setting gradually, encapsulating material, solaode, Encapsulating material, backboard it is characterised in that：Described backboard is the novel solar battery backboard described in any one of claim 1-9.