CN105006497B - High pressure backboard is used in a kind of crystal silicon component encapsulation - Google Patents

Abstract

The present invention relates to high pressure backboard is used in a kind of crystal silicon component encapsulation, belong to photovoltaic encapsulation Material Field.The backboard is made up of base layer, the weather-proof outer layer of crosslinking fluororesin in the middle of modified olefin internal layer, polyester.Obtained in of the invention, backboard has very high shelf depreciation pressure, while also having good water vapor barrier property and excellent mechanical strength and outdoor weathe resistance.Preparation technology of the present invention is easy, and properties of product are stable, apply to the outstanding photovoltaic back of big system crystal silicon component.

Description

High pressure backboard is used in a kind of crystal silicon component encapsulation

Technical field

The present invention relates to high pressure backboard is used in a kind of crystal silicon component encapsulation, belong to photovoltaic encapsulation Material Field.

Background technology

Photovoltaic generating system is the electricity generation system that electric energy is directly converted solar energy into using solar cell.It main Feature be reliability height, long service life, it is free from environmental pollution, can Independent Power Generation can be incorporated into the power networks again, thus by every industry or trade The favor of tissue, with vast potential for future development.

From 19 century 70s, the photovoltaic module of carrying photovoltaic generation Main Function is developed so far and has nearly 40 years Course, with science and technology continuous development and innovation crystal silicon component with its high electricity conversion, high cost performance with And the production technology of maturation gradually occupies the share of photovoltaic module more than 80%.But, the cost of former auxiliary material remains obstruction The popular biggest obstacle of photovoltaic generation.Nearly 2 years, based on the usage amount that can both drop some former auxiliary materials, unit can be increased again The big system component development of the higher price-performance ratio of the photovoltaic power generation quantity on area is quick.Technical staff in industry, actively Assessment and improvement increase system, for the requirement standard of raw and auxiliary material.

From in composition structure, crystal silicon solar battery component is typically by low iron safety glass, front layer EVA film, monolithic sun electricity Pond piece, rear layer EVA film and backboard are constituted.Part of its dorsulum as isolation cell piece and ectocine, no matter in weatherability Aspect still is required for providing reliable guaranteeing role in terms of insulating properties.In terms of insulating properties, common crystal silicon component only will Ask backboard to reach 1000VDC offices electric discharge pressure and can reach the requirement of insulating properties, and for larger system photovoltaic module simultaneously It is inapplicable.Big system component is higher than 1500VDC to resistance to office's electric discharge pressure request of photovoltaic back, and according to its cell piece number can Regulated and controled.In addition to the guarantee in terms of insulating properties, in terms of back board structure stability, water preventing ability, weatherability, it is also desirable to have Long-term reliability.

Therefore, a class is developed with higher shelf depreciation voltage, there is more excellent adhesive property, mechanical performance, water again Vapour barrier and the performance such as ageing-resistant, while preparation technology is convenient and photovoltaic back of stable performance is solar cell package row Industry solves the problem that big system component supplementary material is most urgently solved.

The content of the invention

The invention aims to make up the deficiencies in the prior art, there is provided high pressure backboard is used in a kind of crystal silicon component encapsulation, This backboard has very high shelf depreciation voltage, and the insulating properties for being adapted to big system photovoltaic module is required, while in bonding Property, the aspect such as mechanical performance, water vapor barrier property and weatherability also there is good long-term reliability.

The purpose of the present invention is achieved through the following technical solutions：High pressure backboard is used in a kind of crystal silicon component encapsulation, successively It is made up of base layer in the middle of modified olefin internal layer, polyester and the weather-proof outer layer of crosslinking fluororesin；The modified olefin internal layer thickness is 100～1000 μm, by the first matrix resin, 0.1～10% modified additive A that mass fraction is 65%～95%, 0.1～ 10% modified additive B, 0～30% inorganic filler, 0.001%～0.1% ultraviolet absorber, 0.001%～0.1% Light stabilizer, 0.001%～0.1% thermo oxidative aging agent, 0.01%～5% initiator composition, the first main body tree Fat is propylene, butylene, heptene, octene, ENB, vinylacetate, methyl acrylate, the one kind in methyl methacrylate Or two kinds of monomers form olefin copolymer according to any proportioning copolymerization with ethene；In the middle of the polyester matrix ligament thickness be 50～ 300 μm, by the second matrix resin, 0～15% inorganic filler that mass fraction is 80%～95%, 0.1%～8% hydrolysis Stabilizer, 0.01%～3% thermo oxidative aging agent be well mixed after after 250-260 DEG C of melt-processed, it is Jing casting film-formings, double It is obtained to stretching；Second matrix resin is by polyethylene terephthalate, polybutylene terephthalate (PBT), poly- naphthalene two One or more in formic acid glycol ester, PBN is constituted according to any proportioning；The crosslinking fluororesin Weather-proof outer layer thickness is 5～50 μm, inorganic is filled out by the 3rd matrix resin that mass fraction is 70%～90%, 5%～20% Material, 1%～15% crosslinking agent, 0.001%～1% catalyst composition, the 3rd matrix resin is fluororesin, by hydroxyl The poly- trifluoro-ethylene ester type fluorocarbon resin of poly- trifluoro-ethylene ether type fluorocarbon resin, hydroxyl, hydroxyl polytetrafluoroethylene (PTFE) ether type fluorocarbon resin, One or more in hydroxyl polytetrafluoroethylene (PTFE) ester type fluorocarbon resin is constituted according to any proportioning.

Further, the modified additive A is one or several following mixtures constituted according to any proportioning：Acrylic acid Hydroxyl methyl esters, hydroxy-ethyl acrylate, hydroxypropyl acrylate, 4- hydroxyl ester butyl propyleneglycol acid esters, ethoxy caprolactone acrylic acid, methyl-prop Olefin(e) acid hydroxyl methyl esters, hydroxyethyl methacrylate, hydroxy propyl methacrylate, 4- hydroxyl ester butyl methyl acrylate, ethoxy oneself Lactone methacrylic acid, acrylate, acrylic acid diethylamino ethyl ester, acrylic acid tert-butylamino second Ester, urine base acrylate, dimethylaminoethyl methacrylate, diethyl aminoethyl methacrylate, methacrylic acid T-butylaminoethyl, urine methyl acrylate；The modified additive B is constituted according to any proportioning for one or several following Mixture：Silane grafted polyethylene, maleic anhydride grafted polyethylene, glycidyl methacrylate graft polyethylene, third Acrylamide grafted polyethylene；Described fluororesin is one or several following mixtures constituted according to any proportioning.

Further, the inorganic filler is one or several following mixtures constituted according to any proportioning：Talcum powder, Calcined kaolin, montmorillonite, mica powder, titanium dioxide, calcium carbonate, barium sulfate, magnesium silicate, aluminium hydroxide, magnesium hydroxide, carbonization Silicon, copper-chrome black, siderochrome are black, carbon black；

Further, the initiator is one or several following mixtures constituted according to any proportioning：Benzoyl peroxide Double (benzoyl the peroxide)-hexanes of formyl, 2,5- dimethyl -2,5-, 3,3- double (t-butyl peroxy) ethyl butyrate, neighbours, o- uncle penta Base-o- (2- ethylhexyls)-mono--peroxycarbonates, neighbour, the o- tert-butyl group-o- isopropyl-mono--peroxycarbonates, neighbour, The o- tert-butyl group-o- (2- ethylhexyls)-mono--peroxycarbonates, normal-butyl 4,4- bis- (tert-butyl peroxide) valerate, 2, Double (the t-butyl peroxy)-hexanes of 5- dimethyl -2,5-；

Further, the ultraviolet absorber is one or several following mixtures constituted according to any proportioning：2- hydroxyls Base -4- methoxy benzophenones, UV-531,2,4 dihydroxyl benzophenone, 2,2,4- trihydroxies Benzophenone, 2- (2 '-hydroxyl -3 '-the tert-butyl group -5 '-aminomethyl phenyl) -5- chloro benzo triazoles, 2- (2 '-hydroxyl -3 ', 5 ' - Di-t-butyl -5 '-aminomethyl phenyl) -5- chloro benzo triazoles, 3- [3- (2-H- BTA -2- bases) the tertiary fourths of -4- hydroxyl -5- Base phenyl]-propionic acid-macrogol ester, 2- (2H- BTA -2- bases) -6- dodecyl -4- methylphenols, 2- (2'- hydroxyls Base -5'- t-octyl phenyl) BTA, 2- (4,6- double (2,4- 3,5-dimethylphenyls) -1,3,5- triazine -2- bases) -5- octyloxies Phenol, 2- [4- [2- hydroxyl -3- tridecane epoxide propyl group] epoxide] -2- hydroxy phenyls] double (the 2,4- 3,5-dimethylphenyls) -1 of -4,6-, 3,5- triazines, 2- [4- [2- hydroxyl -3- dodecyloxy propyl group] epoxide] -2- hydroxy phenyls] double (the 2,4- dimethyl benzenes of -4,6- Base) -1,3,5- triazines；

Further, the light stabilizer is one or several following mixtures constituted according to any proportioning：Double (1,2, 2,6,6- pentamethyl -4- piperidyls)-sebacate/mono- (1,2,2,6,6- pentamethyl -4- piperidyls) sebacate compound, Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, poly- { [6- [(1,1,3,3- tetramethyl butyls) amino]] -1,3,5- Triazine -2,4- [(2,2,6,6,-tetramethyl-4-piperidyl) imido, double (1- octyloxy -2,2,6,6- tetramethyl -4- piperidyls) last of the ten Heavenly stems Two acid esters, 2,2,6,6- tetramethyl -4- piperidines stearates, poly-succinic (4- hydroxyl -2,2,6,6- tetramethyl -1- piperidines second Alcohol) ester；

Further, the thermo oxidative aging agent is one or several following mixtures constituted according to any proportioning：Four (3,5- di-t-butyl -4- hydroxyls) benzenpropanoic acid pentaerythritol ester, β-positive 18 carbon of (3,5- di-tert-butyl-hydroxy phenyls) propionic acid Alcohol ester, 2'- di-2-ethylhexylphosphine oxides-(4- methyl-6-tert-butylphenols), three (3,5- di-t-butyl -4- of 1,3,5- trimethyls -2,4,6- Hydroxybenzyl) benzene, triethylene glycol ether-two (3- tertiary butyl-4-hydroxy -5- aminomethyl phenyls) propionic ester, tri- (the tertiary fourths of 4- of 1,3,5- Base -3- hydroxyl -2,6- dimethyl benzyls) -1,3,5- triazine -2,4,6- (1H, 3H, 5H)-triketone, three (2,4- bis- of phosphorous acid Tert-butyl-phenyl) ester, double (2,4- di-tert-butyl-phenyls) pentaerythritol diphosphites, double (2,6- di-t-butyl -4- methylbenzenes Base) pentaerythritol diphosphate, double four oxygen -3,9- hosphospiros [5.5] hendecanes of octadecane epoxide -2,4,8,10- of 3,9-, 9, Miscellaneous -10- phospho hetero phenanthrenes -10- the oxides of 10- dihydro-9-oxies, the split isopropyl diphenyl base C12-15- alcohol phosphite esters of 4,4'-；

Further, the hydrolysis stabilizer is one or several following mixtures constituted according to any proportioning：Monomer Carbodiimides hydrolysis stabilizer, polycarbodiimide class hydrolysis stabilizer, monocarboxylic glycidol hydrolysis of lipid are steady Determine agent；

Further, the crosslinking agent is one or several following mixtures constituted according to any proportioning：Hexa-methylene Diisocyanate trimer, hexamethylene diisocyanate prepolymer, isophorone diisocyanate trimer, isophorone two The many melamine methylol resins of isocyanate prepolymer, methyl-etherified, many melamine methylol resins of butyl etherization, mixed etherificate are more Melamine methylol resin；

Further, the catalyst is one or several following mixtures constituted according to any proportioning：Stannous octoate, Tin dilaurate dioctyl tin, monobutyltin oxide, three isooctyl acid tin of monobutyl, dibutyl tin laurate, acetic acid, to toluene sulphur Acid, phthalic acid, laurate, isooctyl acid.

The raw materials used commercially available acquisition of the present invention.Intermediate layer in three-decker can be by high temperature melting well known in the art Melt blending after extrusion and stretch processes be obtained, internal layer can by melting casting film-forming after fit to intermediate layer together with make , then using elder generation, Jing after wet coating, thermal curing methods are obtained outer layer again.

The beneficial effects are mainly as follows：By easy production technology, produce suitable for big system crystal silicon Component high pressure photovoltaic back；The backboard had both had high shelf depreciation voltage, was adapted to the insulation of big system photovoltaic module Property require, while at aspects such as caking property, mechanical performance, water vapor barrier property and weatherabilities with excellent combination property, energy The protective effect in the crystal silicon component of big system to whole component of photovoltaic back is played enough, it is ensured that component is reliably and with long-term Property.

Description of the drawings

Fig. 1 is a kind of profile of crystal silicon component encapsulation high pressure backboard of the invention.Wherein, 1 is modified olefin internal layer, 2 It is base layer in the middle of polyester, 3 is the weather-proof outer layer of crosslinking fluororesin.

Specific embodiment

With reference to embodiment, the invention will be further described, but protection scope of the present invention is not only limited to implement Example.

It should be noted that the property indices of photovoltaic back are being measured by following method：

1. shelf depreciation voltage

Method of testing reference standard IEC 61730《Photovoltaic (PV) component safety is identified》.

Specimen size：100mm*100mm.

Test condition：Rate of pressure rise 20-100V/s

2. tensile strength and elongation at break

Method of testing reference standard GB/T 13542.2《Electric insulation film》.

Specimen size：200mm*15mm.

Draw speed：100mm/min.

3. interlaminar strength

Method of testing reference standard GB/T2790《180 ° of peeling strength test method flexible materials of adhesive are to rigid material Material》.

Specimen size：200mm*15mm.

Draw speed：100mm/min.

4. backboard/EVA peel strengths

Method of testing reference standard GB/T2790《180 ° of peeling strength test method flexible materials of adhesive are to rigid material Material》.

Specimen size：300mm*10mm.

Draw speed：100mm/min.

5. constant wet and heat ageing resistant performance

Method of testing reference standard GB/T2423.3《High-and-low temperature humid heat test method》.

Experimental condition：+ 85 DEG C, relative humidity 85%.

Test it is forward and backward to sample yellowness index (Δ YI) by GB GB 2409《Plastics yellow colour index test method》Determine.

6. water vapor transmittance

Method of testing reference standard ASTM F1249《Plastic foil is determined with modulated infrared sensor and thin plate water vapour is saturating The test method of the property crossed》.

Experimental condition：+ 40 DEG C, relative humidity 100%.

Embodiment 1：

Backplane fabrication process is as follows：

First, by polyethylene terephthalate (du pont company) 85wt%, inorganic filler titanium dioxide R960 is (beautiful E.I.Du Pont Company of state) 10wt%, hydrolysis stabilizer I powder (TUV chemistry) 3wt%, thermo oxidative aging agent four (3,5- bis- Tertiary butyl-4-hydroxy) benzenpropanoic acid pentaerythritol ester (BASF Aktiengesellschaft) 2wt%, melt at 250-260 DEG C after being well mixed After processing, after casting film-forming, biaxial tension is obtained 150 microns of thick intermediate layer films.

Then, in the weather-proof outer layer coating that 50 microns of a face roller coat in intermediate layer is thick.Outer layer coating dispensing is fluororesin GK570 (Daikin) 70wt%, inorganic filler titanium dioxide R900 (du pont company) 20wt%, crosslinking agent hexa-methylene two Isocyanate trimer (Bayer A.G) 4wt% and hexamethylene diisocyanate prepolymer (Bayer A.G) 5wt%, octoate catalyst stannous (Shanghai Xin Dian chemical materials Co., Ltd) 1wt%.Raw material is well mixed, it is solid at 150 DEG C Change 3min to prepare.

Finally, in the improved polyalkene film that 500 microns of the another side showering in intermediate layer is thick.Wherein, improved polyalkene is thin The dispensing of film is ethylene-butene copolymer (Dow Chemical company) 90wt%, and (win wound is special for modified additive hydroxy-ethyl acrylate Kind of chemical company) 1wt% and silane grafted polyethylene (Ao Sijia companies of the U.S.) 7wt%, ultraviolet absorber 2- (2 '-hydroxyl- 3 '-tert-butyl group -5 '-aminomethyl phenyl) -5- chloro benzo triazole (BASF Aktiengesellschaft) 0.07wt%, light stabilizer 2,2, 6,6- tetramethyl -4- piperidines stearates (Taiwan double bond chemical company) 0.03wt%, four (3,5- bis- tertiary fourths of thermo oxidative aging agent Base -4- hydroxyls) benzenpropanoic acid pentaerythritol ester (BASF Aktiengesellschaft) 0.1wt%, initiator 2,5- dimethyl -2, the double (benzene of 5- Formyl peroxide)-hexane (Qingdao Rong Ji Chemical Co., Ltd.s) 1.8wt%.Raw material is well mixed, the thermosetting at a temperature of 130 DEG C Change 5min to prepare.A kind of high pressure photovoltaic back S1 is obtained.

Embodiment 2：

Backplane fabrication process is as follows：

First, by polybutylene terephthalate (PBT) (du pont company) 80wt%, montmorillonite DK4 is (prosperous for inorganic filler Brilliant science and technology) 15wt%, hydrolysis stabilizer UN-03 (the outstanding grace chemical industry in Shanghai) 4wt% ,-two (3- of thermo oxidative aging agent triethylene glycol ether Tertiary butyl-4-hydroxy -5- aminomethyl phenyls) propionic ester (Taiwan forever Optical Chemical Company) 1wt%, at 250-260 DEG C after being well mixed After melt-processed, after casting film-forming, biaxial tension is obtained 300 microns of thick intermediate layer films.

Then, in the weather-proof outer layer coating that 10 microns of a face roller coat in intermediate layer is thick.Outer layer coating dispensing is fluororesin Lumiflon 200 (Japan AGC) 80wt%, inorganic filler titanium dioxide TR81 (Hensel Man of the U.S.) 10wt%, crosslinking Agent isophorone diisocyanate trimer (Bayer A.G) 2wt% and many melamine methylol resin (cyclopentadienyls of mixed etherificate Good chemical company) 7wt%, catalyst dibutyltin dilaurylate (Jinan multidimensional bridge chemical company) 0.2wt% and to toluene sulphur Acid (Hangzhou chemical reagents corporation) 0.8wt%.Raw material is well mixed, is solidified 2min at 160 DEG C and is prepared.

Finally, in the improved polyalkene film that 100 microns of the another side showering in intermediate layer is thick.Wherein, improved polyalkene is thin The dispensing of film be ethylene-octene copolymer (Dow Chemical company) 80wt%, modified additive 4- hydroxyl ester butyl methyl propylene Acid esters (Ying Chuan Specialty Chemicals company) 5wt% and glycidyl methacrylate graft polyethylene (Nanjing Hua Dou scientific ＆ technical corporation) 0.5wt%, inorganic filler titanium dioxide r902 (du pont company) 12wt%, ultraviolet absorber 2- hydroxyl -4- n-octyloxies two Benzophenone (Taiwan forever Optical Chemical Company) 0.1wt%, light stabilizer are double (1- octyloxy -2,2,6,6- tetramethyl -4- piperidyls) Sebacate (Taiwan forever Optical Chemical Company) 0.05wt%, thermo oxidative aging agent triethylene glycol ether-two (3- tertiary butyl-4-hydroxies- 5- aminomethyl phenyls) propionic ester (BASF Aktiengesellschaft) 0.05wt%, initiator 2,5- dimethyl -2, double (the benzoyl mistakes of 5- Oxygen)-hexane (Qingdao Rong Ji chemical companies) 2.3wt%.Raw material is well mixed, at a temperature of 140 DEG C prepared by heat cure 2min Obtain.A kind of high pressure photovoltaic back S2 is obtained.

Embodiment 3：

Backplane fabrication process is as follows：

First, by polyethylene naphthalate (Taiwan Changchun) 90wt%, inorganic filler titanium dioxide r902 (is shut out in the U.S. Company of nation) 5wt%, hydrolysis stabilizer P400 (TUV chemistry) 3wt%, thermo oxidative aging agent 2'- di-2-ethylhexylphosphine oxides-(4- first Base -6- tert-butyl phenols) (BASF Aktiengesellschaft) 2wt%, after being well mixed after 250-260 DEG C of melt-processed casting film-forming Biaxial tension afterwards is obtained 250 microns of thick intermediate layer films.

Then, in the weather-proof outer layer coating that 20 microns of a face roller coat in intermediate layer is thick.Outer layer coating dispensing is fluororesin 41088 (Changxing chemistry) 90wt%, black (U.S.'s good fortune Lu) 5wt% of inorganic filler siderochrome, crosslinking agent hexamethylene diisocyanate Prepolymer (Bayer A.G) 4.8wt%, catalyst monobutyltin oxide (traditional Chinese medicines Reagent Company) 0.2wt%.Raw material is mixed Close uniform, solidify 3.5min at 155 DEG C and prepare.

Finally, in the improved polyalkene film that 200 microns of the another side showering in intermediate layer is thick.Wherein, improved polyalkene is thin The dispensing of film be ethylene-propylene copolymer (Dow Chemical company) 75wt%, modified additive dimethylaminoethyl acrylate methyl base ammonia Base ethyl ester (and wound chemical company) 8wt% and acrylamide graft polyethylene (Hua Lin chemical companies) 5wt%, inorganic filler calcining Kaolin (BASF Aktiengesellschaft) 10wt%, ultraviolet absorber 2- (4,6- double (2,4- 3,5-dimethylphenyl) -1,3,5-triazines - 2- yls) -5- octyloxy phenol (BASF Aktiengesellschaft) 0.08wt%, light stabilizer poly-succinic (4- hydroxyl -2,2,6,6- tetramethyls Base -1- piperidine ethanols) ester (BASF Aktiengesellschaft) 0.06wt%, thermo oxidative aging agent β-(3,5- di-t-butyl -4- hydroxy benzenes Base) the positive octadecanol ester of propionic acid (Taiwan double bond chemical company) 0.04wt%, initiator normal-butyl 4, bis- (the tertiary fourths of peroxidating of 4- Base) valerate (Qingdao Rong Ji Chemical Co., Ltd.s) 1.82wt%.Raw material is well mixed, the heat cure at a temperature of 135 DEG C 3.5min prepare.A kind of high pressure photovoltaic back S3 is obtained.

Embodiment 4：

Backplane fabrication process is as follows：

First, by polyethylene terephthalate (Taiwan Changchun) 95wt%, inorganic filler carbon black MA100 (Mitsubishis Learn) 2wt%, hydrolysis stabilizer glycidyl neodecanoate (Dow Chemical company) 2.5wt%, thermo oxidative aging agent 1,3, 5- trimethyl -2,4,6- tri- (3,5- di-tert-butyl-4-hydroxyl benzyl) benzene (BASF Aktiengesellschaft) 0.5wt%, are well mixed After 250-260 DEG C of melt-processed, after casting film-forming, biaxial tension is obtained 280 microns of thick intermediate layer films afterwards.

Then, in the weather-proof outer layer coating that 5 microns of a face roller coat in intermediate layer is thick.Outer layer coating dispensing is fluororesin 4102 (Changxing chemistry) 85wt%, inorganic filler carborundum (Jin Meng new materials company) 8wt%, many methylol trimerizations of crosslinking agent methyl-etherified Melamine resin (Taiwan Changchun chemistry) 6wt%, catalyst phthalic acid (Hangzhou Sheng Li chemical companies) 1wt%.Raw material is mixed Close uniform, solidify 3.5min at 145 DEG C and prepare.

Finally, in the improved polyalkene film that 200 microns of the another side showering in intermediate layer is thick.Wherein, improved polyalkene is thin The dispensing of film be ethylene-vinyl acetate copolymer (Dow Chemical company) 95wt%, modified additive methacrylic acid two Methylamino ethyl ester (BASF Aktiengesellschaft) 0.1wt% and silane grafted polyethylene (Ao Sijia companies of the U.S.) 0.1wt%, Inorganic filler barium sulfate (Zhong Jiang chemical companies) 4wt%, ultraviolet absorber 3- [3- (2-H- BTA -2- bases) -4- hydroxyls - 5- tert-butyl-phenyls]-propionic acid-macrogol ester (Taiwan double bond chemical company) 0.1wt%, light stabilizer double (1,2,2,6,6- Pentamethyl -4- piperidyls) (Taiwan is double for-sebacate/mono- (1,2,2,6,6- pentamethyl -4- piperidyls) sebacate compound Key chemical company) 0.05wt%, thermo oxidative aging agent 3, double octadecane epoxide -2 of 9-, 4,8,10- tetra- oxygen -3,9- hosphospiros [5.5] hendecane (Taiwan double bond chemical company) 0.05wt%, initiator are adjacent, and the o- tert-butyl group-o- (2- ethylhexyls)-mono-- Peroxycarbonates (Hai Jing chemical companies) 0.6wt%.Raw material is well mixed, at a temperature of 155 DEG C prepared by heat cure 3min Obtain.A kind of high pressure photovoltaic back S4 is obtained.

Embodiment 5：

Backplane fabrication process is as follows：

First, will be poly- to naphthalenedicarboxylic acid butanediol ester (Taiwan Changchun) 87wt%, (Britain is beautiful for inorganic filler titanium dioxide R595 Li Lian companies) 8wt%, hydrolysis stabilizer P400 (TUV chemistry) 3.5wt%, thermo oxidative aging agent 9,10- dihydro-9-oxies Miscellaneous -10- phospho hetero phenanthrenes -10- oxides (BASF AG) 1.5wt%, is cast after being well mixed after 250-260 DEG C of melt-processed Biaxial tension after film forming is obtained 100 microns of thick intermediate layer films.

Then, in the weather-proof outer layer coating that 25 microns of a face roller coat in intermediate layer is thick.Outer layer coating dispensing is fluororesin T-1 (three love enrichments) 75wt%, inorganic filler titanium dioxide TR88 (Hensel Man of the U.S.) 17wt%, crosslinking agent isophorone two Isocyanate prepolymer (Japanese polyurethane company) 7.9wt%, catalyst dibutyltin cinnamic acid dioctyl tin (the new allusion quotation chemical material in Shanghai Co., Ltd) 0.1wt%.Raw material is well mixed, is solidified 5min at 140 DEG C and is prepared.

Finally, in the improved polyalkene film that 300 microns of the another side showering in intermediate layer is thick.Wherein, improved polyalkene is thin The dispensing of film be ethylene-heptene copolymer (Dow Chemical company) 85wt%, modified additive ethoxy caprolactone methyl-prop Olefin(e) acid (BASF Aktiengesellschaft) 1wt% and maleic anhydride grafted polyethylene (Hongyuan chemical company) 6wt%, inorganic filler titanium white Powder R706 (du pont company) 6wt%, ultraviolet absorber 2- [4- [2- hydroxyl -3- dodecyloxy propyl group] epoxide] -2- hydroxyls Base phenyl] double (2,4- 3,5-dimethylphenyl) -1,3,5-triazines (BASF Aktiengesellschaft) 0.08wt% of -4,6-, light stabilizer gathers { [6- [(1,1,3,3- tetramethyl butyls) amino]] -1,3,5- triazine -2,4- [(2,2,6,6,-tetramethyl-4-piperidyl) imido (BASF Aktiengesellschaft) 0.04wt%, thermo oxidative aging agent phosphorous acid three (2,4- di-tert-butyl-phenyl) ester (German BASF Company) 0.03wt%, initiator 3, double (t-butyl peroxy) ethyl butyrate (the rich Silin chemical company) 1.85wt% of 3-.By raw material It is well mixed, at a temperature of 160 DEG C, heat cure 3.5min is prepared.A kind of high pressure photovoltaic back S5 is obtained.

Comparative example 1：

Photovoltaic back is buied on marketPYE SPV, structure is PET/PET/Primer, and thickness 295 ± 5 is micro- Rice.

Performance detection is carried out to the material of a kind of high pressure backboard and comparative example 1 obtained in embodiment 1,2,3,4,5, as a result As shown in table 1.

Table 1：The performance parameter of obtained high office's electric discharge pressure photovoltaic back

From data in table, crystal silicon component encapsulation of the present invention is used high pressure backboard, can meet the need of big system crystal silicon component Ask.In addition, also having good reliability in terms of adhesive property, water vapor barrier property, mechanical strength, weatherability, can expire completely Sufficient rear surface of solar cell protects the requirement as protective material.Preparation technology of the present invention is easy, and stable performance is not only greatly improved The security of big system component, and important leverage is provided for component reduction supplementary material cost.

Claims (10)

1. high pressure backboard is used in a kind of crystal silicon component encapsulation, successively by base layer in the middle of modified olefin internal layer, polyester and crosslinking fluorine tree The weather-proof outer layer composition of fat；Characterized in that, the modified olefin internal layer thickness is 100～1000 μm, it is 65% by mass fraction ～95% the first matrix resin, 0.1～10% modified additive A, 0.1～10% modified additive B, 0～30% it is inorganic Filler, 0.001%～0.1% ultraviolet absorber, 0.001%～0.1% light stabilizer, 0.001%～0.1% heat resistanceheat resistant Oxygen aging agent, 0.01%～5% initiator composition, first matrix resin is propylene, butylene, heptene, octene, norborneol One or two monomers and ethene in alkene, vinylacetate, methyl acrylate form olefin-copolymerization according to any proportioning copolymerization Thing；In the middle of the polyester matrix ligament thickness be 50～300 μm, by the second matrix resin that mass fraction is 80%～95%, 0～ 15% inorganic filler, 0.1%～8% hydrolysis stabilizer, 0.01%～3% thermo oxidative aging agent be well mixed after After 250-260 DEG C of melt-processed, Jing casting film-formings, biaxial tension are obtained；Second matrix resin is by poly terephthalic acid second One kind or many in diol ester, polybutylene terephthalate (PBT), PEN, PBN Plant and constitute according to any proportioning；The weather-proof outer layer thickness of fluororesin that is crosslinked is 5～50 μm, is 70%～90% by mass fraction The 3rd matrix resin, 5%～20% inorganic filler, 1%～15% crosslinking agent, 0.001%～1% catalyst group Into the 3rd matrix resin is fluororesin, by the poly- trifluoro-ethylene ether type fluorocarbon resin of hydroxyl, the poly- trifluoro-ethylene ester type fluorine of hydroxyl One or more in carbon resin, hydroxyl polytetrafluoroethylene (PTFE) ether type fluorocarbon resin, hydroxyl polytetrafluoroethylene (PTFE) ester type fluorocarbon resin is pressed Constitute according to any proportioning.

2. high pressure backboard according to claim 1, it is characterised in that the modified additive A is pressed for one or several following According to the mixture of any proportioning composition：Acrylate, hydroxy-ethyl acrylate, hydroxypropyl acrylate, 4- hydroxyl ester butyl propyleneglycols Acid esters, ethoxy caprolactone acrylic acid, acrylate, acrylic acid diethylamino ethyl ester, the tertiary fourth of acrylic acid Base amino ethyl ester, urine base acrylate；The modified additive B is one or several following mixing constituted according to any proportioning Thing：Silane grafted polyethylene, maleic anhydride grafted polyethylene, glycidyl methacrylate graft polyethylene, acrylamide Grafted polyethylene.

3. high pressure backboard according to claim 1, it is characterised in that the inorganic filler be one or several following according to The mixture that arbitrarily proportioning is constituted：Talcum powder, calcined kaolin, montmorillonite, mica powder, titanium dioxide, calcium carbonate, barium sulfate, silicon Sour magnesium, aluminium hydroxide, magnesium hydroxide, carborundum, copper-chrome black, siderochrome are black, carbon black.

4. high pressure backboard according to claim 1, it is characterised in that the initiator is one or several following according to appointing The mixture of meaning proportioning composition：Double (benzoyl the peroxide)-hexanes of benzoyl peroxide, 2,5- dimethyl -2,5-, the double (uncles of 3,3- Butyl peroxy) ethyl butyrate, neighbour, o- tertiary pentyl-o- (2- ethylhexyls)-mono--peroxycarbonates, neighbour, the o- tert-butyl group- O- isopropyl-mono--peroxycarbonates, neighbour, the o- tert-butyl group-o- (2- ethylhexyls)-mono--peroxycarbonates, normal-butyl Double (the t-butyl peroxy)-hexanes of 4,4- bis- (tert-butyl peroxide) valerate, 2,5- dimethyl -2,5-.

5. high pressure backboard according to claim 1, it is characterised in that the ultraviolet absorber is pressed for one or several following According to the mixture of any proportioning composition：ESCALOL 567, UV-531,2,4- Dihydroxy benaophenonel, 2,2,4- trihydroxybenzophenones, 2- (2 '-hydroxyl -3 '-the tert-butyl group -5 '-aminomethyl phenyl) -5- chloros BTA, 2- (2 '-hydroxyl -3 ', 5 '-di-t-butyl -5 '-aminomethyl phenyl) -5- chloro benzo triazoles, 3- [3- (2-H- BTA -2- bases) -4- hydroxyl -5- tert-butyl-phenyls]-propionic acid-macrogol ester, 2- (2H- BTA -2- bases) -6- ten Dialkyl group -4- methylphenols, 2- (2'- hydroxyl -5'- t-octyl phenyl) BTA, 2- (double (the 2,4- dimethyl benzenes of 4,6- Base) -1,3,5- triazine -2- bases) -5- octyloxy phenol, 2- [4- [2- hydroxyl -3- tridecane epoxide propyl group] epoxide] -2- hydroxy benzenes Base] -4,6- double (2,4- 3,5-dimethylphenyls) -1,3,5- triazines, 2- [4- [2- hydroxyl -3- dodecyloxy propyl group] epoxide] -2- Hydroxy phenyl] double (2,4- the 3,5-dimethylphenyls) -1,3,5- triazines of -4,6-.

6. high pressure backboard according to claim 1, it is characterised in that the light stabilizer be one or several following according to The mixture that arbitrarily proportioning is constituted：Double (1,2,2,6,6- pentamethyl -4- piperidyls)-sebacate/mono- (five first of 1,2,2,6,6- Base -4- piperidyls) sebacate compound, bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, it is poly- [6- [(1,1,3, 3- tetramethyl butyls) amino]] -1,3,5- triazine -2,4- [(2,2,6,6,-tetramethyl-4-piperidyl) imido, it is double (1- octyloxies - 2,2,6,6- tetramethyl -4- piperidyls) sebacate, 2,2,6,6- tetramethyl -4- piperidines stearates, poly-succinic (4- hydroxyls Base -2,2,6,6- tetramethyl -1- piperidine ethanols) ester.

7. high pressure backboard according to claim 1, it is characterised in that the thermo oxidative aging agent is one or several following According to the mixture that any proportioning is constituted：Four (3,5- di-t-butyl -4- hydroxyls) benzenpropanoic acid pentaerythritol ester, β-(bis- uncles of 3,5- Butyl -4- hydroxy phenyls) the positive octadecanol ester of propionic acid, 2'- di-2-ethylhexylphosphine oxides-(4- methyl-6-tert-butylphenols), 1,3,5- front threes Base -2,4,6- three (3,5- di-tert-butyl-4-hydroxyl benzyls) benzene,-two (3- tertiary butyl-4-hydroxy -5- methylbenzenes of triethylene glycol ether Base) propionic ester, 1,3,5- tri- (the 4- tert-butyl group -3- hydroxyl -2,6- dimethyl benzyls) -1,3,5- triazine -2,4,6- (1H, 3H, 5H)-triketone, phosphorous acid three (2,4- di-tert-butyl-phenyls) ester, double (2,4- di-tert-butyl-phenyls) pentaerythritol diphosphites, Double four oxygen -3 of octadecane epoxide -2,4,8,10- of double (2,6- di-t-butyl -4- aminomethyl phenyls) pentaerythritol diphosphates, 3,9-, The split isopropyl of the miscellaneous -10- phospho hetero phenanthrenes -10- oxides of 9- hosphospiros [5.5] hendecane, 9,10- dihydro-9-oxies, 4,4'- two Phenyl C12-15- alcohol phosphite esters.

8. high pressure backboard according to claim 1, it is characterised in that the hydrolysis stabilizer is pressed for one or several following According to the mixture of any proportioning composition：Monomer Carbodiimides hydrolysis stabilizer, polycarbodiimide class hydrolysis stabilizer, one The glycidol hydrolysis of lipid stabilizer of first carboxylic acid.

9. high pressure backboard according to claim 1, it is characterised in that the crosslinking agent is one or several following according to appointing The mixture of meaning proportioning composition：Hexamethylene diisocyanate trimer, hexamethylene diisocyanate prepolymer, different Fo Er The many melamine methylol resins of ketone diisocyanate trimer, IPDI prepolymer, methyl-etherified, butyl ether Many melamine methylol resins, many melamine methylol resins of mixed etherificate.

10. high pressure backboard according to claim 1, it is characterised in that the catalyst be one or several following according to The mixture that arbitrarily proportioning is constituted：Stannous octoate, tin dilaurate dioctyl tin, monobutyltin oxide, three isooctyl acid tin of monobutyl, Dibutyl tin laurate, acetic acid, p-methyl benzenesulfonic acid, phthalic acid, laurate, isooctyl acid.