CN108859353A - A kind of preparation method of PE laminated film and solar energy backboard comprising the film - Google Patents

A kind of preparation method of PE laminated film and solar energy backboard comprising the film Download PDF

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Publication number
CN108859353A
CN108859353A CN201810489836.0A CN201810489836A CN108859353A CN 108859353 A CN108859353 A CN 108859353A CN 201810489836 A CN201810489836 A CN 201810489836A CN 108859353 A CN108859353 A CN 108859353A
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film
layer
ldpe
lldpe
laminated film
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CN108859353B (en
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潘健
汪飞
汪学文
谢文汇
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Novel Huangshan Packaging Co Ltd
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Novel Huangshan Packaging Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/32—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of preparation method of PE laminated film, S1, with 1:1~1:3 ratio mixes LDPE and LLDPE, and surface layer PE film is made by coextrusion casting or coextrusion film blowing；With 1:1~1:3 ratio mixes LDPE and LLDPE, and ultraviolet screening mother granule and white mother are mixed into LDPE and LLDPE, passes through coextrusion casting or sandwich layer PE film is made in coextrusion film blowing；With 1:1~1:3 ratio mixes LDPE and LLDPE, and is mixed into ultraviolet screening mother granule and white mother and EVA resin in LDPE and LLDPE, passes through coextrusion casting or hot sealing layer PE film is made in coextrusion film blowing；S2, PE laminated film is prepared by way of three-layer co-extruded curtain coating or blown film.The PE laminated film that the present invention prepares has biggish promotion in tensile strength, easily peelable degree, heat seal strength, anti-ultraviolet aging aspect of performance compared with the common PE film of stack pile.

Description

A kind of preparation method of PE laminated film and solar energy backboard comprising the film
Technical field
The invention belongs to solar cell backboard technical fields, and in particular to the PE laminated film in a kind of solar energy backboard Preparation method and solar energy backboard comprising the film.
Background technique
Increasingly poor with traditional energy, the whole world increasingly becomes worldwide attention to the development and utilization of new energy Focus, solar energy as new energy have it is inexhaustible, nexhaustible, pollution-free, non-harmful feature and closed by the whole world Note.Solar cell module is a kind of stepped construction, forms battery component main body knot by panel, glue, cell piece, glue, backboard altogether Structure, backboard be in solar module in addition to cell piece most important material, backboard be in component directly with the big face of external environment The encapsulating material of product contact, plays support and protective effect to the cell piece in component.
Structure more commonly used at present has TPT and TPE structure, and wherein T refers to that the Tedlar film of E.I.Du Pont Company, P refer to poly- pair Ethylene terephthalate (PET) film, E refer to polyethylene film.In TPT structure, backboard will lean on EVA adhesive film and solar battery Piece is bonded together, and in backboard, non-modified fluororesin and PET are poor with EVA adhesive fastness, therefore backboard and cell piece Contact surface needs bonding layer material, currently, conventional solar cells backboard is usually using polyolefin polymers layer as viscous Layer is tied, there are following defects for this kind of adhesive layer：On the one hand, long-term front receives sunlight irradiation, and easy ultraviolet ageing causes Huang Become and even chap, reduce solar battery transformation efficiency and influences the service life of solar battery；On the other hand, it belongs to easily Polymer material is fired, causes the anti-flammability of backboard poor, combustion is easily caused under long term high temperature operating condition and high ambient conditions It burns, there are security risks.And TPE structure has a very big advantage since single side uses fluorine-contained film in price, and PE film with The problem of EVA layer pressure viscosity knotting strength is big, will not fall off in use with EVA substantially and influence battery.But Inevitably understand in solar cell processing course generating assembly breakage, need to separate PE with EVA, be processed again, and PE and The adhesion strength of EVA is larger, is difficult the globality for being allowed to separate without influencing PE and PET.
103642416 A of Chinese patent literature CN discloses a kind of PE THIN COMPOSITE for being easy to solar energy backboard and repeating processing Film, the PE laminated film by the way of blown film or curtain coating be made, PE laminated film by be bonded with adhesive adhesive layer PE, with The middle layer PE and formed with the laminate layers PE of EVA layer pressure viscosity knot that inorganic filler is blended；But add between the different PE layer Enter lubricant, although can be easily separated PE with EVA, affects compound peel strength, the stretching for reducing PE film is strong Degree and extensibility increase production cost.
Therefore, it is urgent to provide a kind of compound peel strength is high, easy to process, anti-ultraviolet aging by those skilled in the art PE laminated film and preparation method thereof simultaneously provides a kind of solar energy backboard comprising the film.
Summary of the invention
In view of the above deficiencies, it is multiple that the present invention provides a kind of high, easy to process, anti-ultraviolet ageing the PE of compound peel strength It closes the preparation method of film and provides a kind of solar energy backboard comprising the film.
To achieve the above object, there is provided a kind of preparation methods of PE laminated film for an object of the present invention, specifically Using following technical scheme：
The PE laminated film successively includes surface layer PE film, sandwich layer PE film and hot sealing layer PE film；It is added in the sandwich layer PE film Ultraviolet screening mother granule and white are female, and ultraviolet screening mother granule, white mother and EVA resin are added in the hot sealing layer PE film；
The basis material of the PE laminated film is made of LDPE and LLDPE；The surface layer PE film, sandwich layer PE film and heat-sealing The ratio of LDPE and LLDPE is 1 in layer PE film:1~1:In 3 ranges；
The trade mark of the LLDPE is 1002YB, and the trade mark of LDPE is Yangba 2420H；
The LDPE that it is 7 using MFI that the ultraviolet screening mother granule, which is used, as carrier, containing compound hindered amine light stabilizer UV32 model master batch；The content of compound hindered amine light stabilizer is in the ultraviolet screening mother granule, that is, UV32 model master batch 18.0~22.0wt%；
The PE laminated film with a thickness of 50~200 μm, the addition of ultraviolet screening mother granule UV32 in center core layer PE film The ratio that amount accounts for PE laminated film total weight is 2.2~2.5wt%, the additive amount of ultraviolet screening mother granule UV32 in hot sealing layer PE film The ratio for accounting for PE laminated film total weight is 0.7~1.2wt%；
The white is female to use 7M2005E model；The additive amount of the white mother 7M2005E of its center core layer PE film accounts for PE THIN COMPOSITE The ratio of film total weight is 8.4~9.4wt%, and the additive amount of the white mother 7M2005E of hot sealing layer PE film accounts for PE laminated film gross weight The ratio of amount is 1.4~2.1wt%；
The EVA resin uses EVA53009 model, and wherein to account for PE compound for the additive amount of EVA53009 in hot sealing layer PE film The ratio of film total weight is 7~8wt%；
The PE laminated film includes following preparation step：
S1, with 1:1~1:3 ratio mixes LDPE and LLDPE, and the surface layer is made by coextrusion casting or coextrusion film blowing PE film；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and be mixed into LDPE and LLDPE ultraviolet screening mother granule and It is white female, the sandwich layer PE film is made by coextrusion casting or coextrusion film blowing；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and is mixed into ultraviolet screening mother granule and white in LDPE and LLDPE The hot sealing layer PE film is made by coextrusion casting or coextrusion film blowing in color masterbatch and EVA resin；
S2, PE laminated film is prepared by way of three-layer co-extruded curtain coating or blown film.
The second object of the present invention is to provide a kind of solar energy backboard comprising above-mentioned PE laminated film, the backboard is successively Including fluororesin layer, the first adhesive layer, pet layer, the second adhesive layer and laminated bonding layer, laminated bonding layer is multiple using the PE Close film.
The beneficial effects of the present invention are：
1) basis material of LDPE and LLDPE material as PE laminated film, is selected in the present invention, and it is good to guarantee that film has Good tension failure performance and certain processing performance.Wherein, LDPE the and LLDPE particle itself in surface layer PE film, which does not add, appoints What slipping agent and opening agent, and without additional addition slipping agent and opening agent, reduce the precipitation of small-molecule substance, reduces to multiple Close the influence of peel strength, it is ensured that apply stability compound with other materials in solar energy backboard in surface layer.Specifically, LDPE and LLDPE can ensure specific blending ratio according to different complex method and composite material, compound if it is squeezing out, The blending ratio of LDPE and LLDPE is 1:1, it is ensured that the melting temperature on surface layer is low, convenient for squeezing out compound fastness.If it is dry type Compound or solvent-free compound, the ratio of LDPE and LLDPE are 1:2 to 1:3, the ratio of LLDPE is improved, can be effectively improved compound Peel strength, improves the tensile strength and extensibility of surface layer film, while lowering production cost.
2), the carrier type selecting and LDPE and LLDPE of ultraviolet screening mother granule and white mother have very in sandwich layer PE film of the present invention Good compatibility, it is ensured that the intensity for occurring without bad situation is plasticized, and being irradiated according to the thickness of the compound PE film and light, UV32 additive amount scope control as ultraviolet screening mother granule is 2.9%~3.7wt% of PE laminated film total weight, can be effective Good ultraviolet radiation protective effect is played in the use of protection film, while will not influence the tensile strength of film and stretching rate, also not It will affect film color.
3), the present invention selects primary raw material of the EVA resin as hot sealing layer, and there is EVA resin High-Speed Automatic fill out to pack institute It is required that low-temperature adhesive property, with PP, HIPS, PSP container there is good bond properties and being easy to take off the performances such as stripping, heat-sealing A certain amount of white of layer addition is female, can improve the whiteness of film, and white is female to be dispersed in sandwich layer and hot sealing layer addition simultaneously, utilizes color It is female co-melting with the dispersion of raw material, it is possible to reduce the probability that crystal point generates improves service life, the replaceability energy of the film.Two Layer addition color masterbatch reduces the use ratio of color masterbatch in the case where ensuring certain sunlight reflection case, reduces the general of crystal point generation Rate.
Specific embodiment
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.
1.PE laminated film
A kind of PE laminated film, the PE laminated film successively include surface layer PE film, sandwich layer PE film and hot sealing layer PE film；It is described It is female that ultraviolet screening mother granule and white are added in sandwich layer PE film, be added in the hot sealing layer PE film ultraviolet screening mother granule, white it is female with And EVA resin.
Wherein, the basis material of the PE laminated film is made of LDPE and LLDPE；The surface layer PE film, sandwich layer PE film And in hot sealing layer PE film LDPE and LLDPE ratio 1:1~1:In 3 ranges；LDPE and LLDPE can be according to different compound Mode and composite material ensure specific blending ratio, and compound if it is squeezing out, the blending ratio of LDPE and LLDPE are 1:1, Ensure that the melting temperature on surface layer is low, convenient for squeezing out compound fastness.It is compound or solvent-free compound if it is dry type, LDPE and The ratio of LLDPE is 1:2 to 1:3.
The trade mark of the LLDPE is 1002YB (Exxon), which has high glaze With the drawing-off performance of Zhuo Yue, manufactured film has splendid tensile property and toughness；The trade mark of LDPE is Yangba 2420H, should Serial low density polyethylene (LDPE) processing performance is good, processing performance is good, toughness is strong.
The LDPE that it is 7 using MFI that the ultraviolet screening mother granule, which is used, as carrier, containing compound hindered amine light stabilizer UV32 model master batch (manufacturer be France precious Leadd B.V), the light stabilizer in UV32 model master batch have lower volatilization Property, it can be widely used in the inflation film and cast film of various thickness, plays good ultraviolet radiation protective effect, while not It will affect the tensile strength of film and stretch rate, will not influence film color；The content of light stabilizer in the UV32 model master batch For 18.0~22.0wt%.
The PE laminated film with a thickness of 50~200 μm, ultraviolet screening mother granule, that is, UV32 model in center core layer PE film The ratio that the additive amount of master batch accounts for PE laminated film total weight is 2.2~2.5wt%, ultraviolet screening mother granule in hot sealing layer PE film The ratio that the additive amount of UV32 accounts for PE laminated film total weight is 0.7~1.2wt%.Specifically, the following table 1 is different film thicknesses When UV32 the corresponding sunshine stationary value of additive amount (ratio for accounting for PE laminated film total weight) --- year thousand langleies (KLy) value (mechanical performance residual 50%), can be according to the additive amount for the intensity adjustment UV32 that the thickness and light of film irradiate.
The additive amount corresponding sunshine stationary value of UV32 when 1. difference film thickness of table
Remarks：140KLy=1 Florida 190KLy=1 Ya Lisang that
The white is female use 7M2005E model (Shanghai Jin Zhu color masterbatch Co., Ltd is in manufacturer), with The good compatibility of LDPE and LLDPE, the additive amount of white mother 7M2005E accounts for PE laminated film total weight in center core layer PE film Ratio be 8.4~9.4wt%, the additive amount of white mother 7M2005E accounts for the ratio of PE laminated film total weight in hot sealing layer PE film Example is 1.4~2.1wt%, and two layers of addition color masterbatch reduces the use ratio of color masterbatch in the case where ensuring certain sunlight reflection case Example reduces the probability that crystal point generates；Ensure occur without the bad situation of plasticizing.
It is 7~8wt% that the additive amount of EVA53009, which accounts for the ratio of PE laminated film total weight, in hot sealing layer PE film, is selected Primary raw material of the EVA resin as hot sealing layer, the EVA resin use EVA53009 model, and EVA resin has High-Speed Automatic fill out The required low-temperature adhesive property of packaging, and the good bond properties of PP, HIPS, PSP container and is easy to take off the performances such as stripping.
Specifically, the physical property of EVA resin film is as shown in table 2 below.
Table 2.EVA resin film physical property
The preparation method of 2.PE laminated film
A kind of preparation method of PE laminated film as described in Example 1, includes the following steps,
S1, with 1:1~1:3 ratio mixes LDPE and LLDPE, and the surface layer is made by coextrusion casting or coextrusion film blowing PE film；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and be mixed into LDPE and LLDPE ultraviolet screening mother granule and It is white female, the sandwich layer PE film is made by coextrusion casting or coextrusion film blowing；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and is mixed into ultraviolet screening mother granule and white in LDPE and LLDPE The hot sealing layer PE film is made by coextrusion casting or coextrusion film blowing in color masterbatch and EVA resin；
S2, PE laminated film is prepared by way of three-layer co-extruded curtain coating or blown film.
As shown in table 3, the performance test data of PE laminated film produced by the present invention.
The performance test data of 3. the present embodiment PE laminated film of table
According to data shown in table 3, show common PE film of the obtained PE laminated film of the present invention compared with stack pile in tension Intensity, easily peelable degree, heat seal strength, anti-aging property have biggish promotion.
3. including the solar energy backboard of the PE laminated film
A kind of solar energy backboard including the PE laminated film, the backboard successively include fluororesin layer, the first adhesive layer, Pet layer, the second adhesive layer and laminated bonding layer, laminated bonding layer use the PE laminated film.

Claims (2)

1. a kind of preparation method of PE laminated film, it is characterised in that：
The PE laminated film successively includes surface layer PE film, sandwich layer PE film and hot sealing layer PE film；Anti- purple is added in the sandwich layer PE film Outside line master batch and white are female, and ultraviolet screening mother granule, white mother and EVA resin are added in the hot sealing layer PE film；
The basis material of the PE laminated film is made of LDPE and LLDPE；The surface layer PE film, sandwich layer PE film and hot sealing layer PE The ratio of LDPE and LLDPE is 1 in film:1~1:In 3 ranges；
The trade mark of the LLDPE is 1002YB, and the trade mark of LDPE is Yangba 2420H；
The LDPE that it is 7 using MFI that the ultraviolet screening mother granule, which is used, as carrier, containing the UV32 type of compound hindered amine light stabilizer Number master batch；In the ultraviolet screening mother granule, that is, UV32 model master batch the content of compound hindered amine light stabilizer be 18.0~ 22.0wt%；
The PE laminated film with a thickness of 50~200 μm, the additive amount of ultraviolet screening mother granule UV32 accounts in center core layer PE film The ratio of PE laminated film total weight is 2.2~2.5wt%, and the additive amount of ultraviolet screening mother granule UV32 accounts for PE in hot sealing layer PE film The ratio of laminated film total weight is 0.7~1.2wt%；
The white is female to use 7M2005E model；It is total that the additive amount of the white mother 7M2005E of its center core layer PE film accounts for PE laminated film The ratio of weight is 8.4~9.4wt%, and the additive amount of the white mother 7M2005E of hot sealing layer PE film accounts for PE laminated film total weight Ratio is 1.4~2.1wt%；
The EVA resin uses EVA53009 model, and wherein the additive amount of EVA53009 accounts for PE laminated film in hot sealing layer PE film The ratio of total weight is 7~8wt%；
The PE laminated film includes following preparation step：
S1, with 1:1~1:3 ratio mixes LDPE and LLDPE, and the surface layer PE is made by coextrusion casting or coextrusion film blowing Film；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and is mixed into ultraviolet screening mother granule and white in LDPE and LLDPE The sandwich layer PE film is made by coextrusion casting or coextrusion film blowing in mother；
With 1:1~1:3 ratio mixes LDPE and LLDPE, and is mixed into ultraviolet screening mother granule and white mother in LDPE and LLDPE And EVA resin, the hot sealing layer PE film is made by coextrusion casting or coextrusion film blowing；
S2, PE laminated film is prepared by way of three-layer co-extruded curtain coating or blown film.
2. a kind of solar energy backboard including PE laminated film described in claim 1, it is characterised in that：The backboard successively includes fluorine Resin layer, the first adhesive layer, pet layer, the second adhesive layer and laminated bonding layer, laminated bonding layer use the PE THIN COMPOSITE Film.
CN201810489836.0A 2015-12-07 2015-12-07 Preparation method of PE composite film and solar backboard comprising PE composite film Active CN108859353B (en)

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