CN104762023A - EVA (ethylene-vinyl acetate) precoating packaging adhesive film and preparation method thereof - Google Patents
EVA (ethylene-vinyl acetate) precoating packaging adhesive film and preparation method thereof Download PDFInfo
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- CN104762023A CN104762023A CN201510136711.6A CN201510136711A CN104762023A CN 104762023 A CN104762023 A CN 104762023A CN 201510136711 A CN201510136711 A CN 201510136711A CN 104762023 A CN104762023 A CN 104762023A
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Abstract
The invention provides an EVA (ethylene-vinyl acetate) precoating packaging adhesive film and a preparation method thereof. The adhesive film is composed of three layers, wherein the middle layer is a BOPP (biaxially-oriented polypropylene) film layer, and the upper and lower layers are respectively an EVA adhesive layer. The EVA adhesive layer is prepared from 100 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of crosslinking agent, 0.1-2 parts of antioxidant, 0.01-0.02 part of light stabilizer and 0.02-0.04 part of tackifier. A precoating technique is adopted to produce the EVA packaging adhesive film, i.e. the EVA adhesive layers are coated to the upper and lower surfaces of the BOPP film layer to constitute the EVA packaging adhesive film, thereby greatly enhancing the production rate and simplifying the technique complexity degree under the support of the BOPP film. The bonding firmness between the EVA adhesive layer and BOPP film layer is enhanced, and the shock strength and environmental stress crack resistance of the adhesive film are enhanced.
Description
technical field:
The present invention relates to printing film technical field, particularly a kind of EVA precoating packaging adhesive film and preparation method thereof.
technical background:
Along with the fast development of solar cell, as the important component part of solar cell, the output of EVA packaging adhesive film constantly increases, though its value is less, but act on very high, and extremely responsive, and improper use produces fatal defect by solar module.EVA packaging adhesive film requires in wide temperature range, have good flexibility, and impact strength, environmental stress crack resistance and good optical property, also have low temperature resistant and nontoxic characteristic.These performance index of EVA packaging adhesive film directly determine the long term quality of solar module, particularly its power attenuation performance.
The production method of existing EVA packaging adhesive film adopts to extrude casting method, and its production rate is slow, and cost is higher, and the performance of product does not reach the requirement as solar module.
summary of the invention:
The object of the present invention is to provide that a kind of production process is simple, the EVA precoating packaging adhesive film of superior performance and preparation method thereof.
Technical scheme of the present invention is as follows:
A kind of EVA precoating packaging adhesive film, this glued membrane forms by three layers, and its middle layer is BOPP thin film layer, upper and lower two-layer are all EVA glue-lines;
Described EVA glue-line is prepared from by weight by following component:
Ethylene-vinyl acetate copolymer 100 parts,
Linking agent 0.5 ~ 1 part,
0.1 ~ 2 part, oxidation inhibitor,
Photostabilizer 0.01 ~ 0.02 part,
Tackifier 0.02 ~ 0.04 part.
Further scheme, the thickness of described BOPP thin film layer is 10 ~ 20 μm, and the thickness of EVA glue-line is 300 ~ 800 μm.
Further scheme, in described ethylene-vinyl acetate copolymer, the mass content of vinyl acetate is 28-30%, melting index MI is 25 ~ 35g/10min under the condition of pressure 2.16kg, temperature 230 DEG C.
Further scheme, described linking agent is two (t-butyl peroxy) hexane of 2,5-dimethyl-2,5-or 1,1-(two tert-butyl peroxide) 3,3,5-trimethyl-cyclohexanes.
Further scheme, described oxidation inhibitor is three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, β-(4-hydroxyl-3,5 di-tert-butyl-phenyls) the positive octadecanol ester of propionic acid, N, N '-1,6-dihexyl two (1,1-dimethyl ethyl)-4-hydroxybenzene propionyl) or tricresyl phosphite (single nonyl benzene and dinonyl benzene mixed ester).
Further scheme, described photostabilizer is two (1,2,2,6,6-pentamethyl--4-piperidyl) sebate and methyl isophthalic acid, the compound of 2,2,6,6-pentamethyl--4-piperidinyl sebacate.
Further scheme, described tackifier are γ-aminopropyl triethoxysilane (KH-550).
Another goal of the invention of the present invention is to provide the preparation method of above-mentioned EVA precoating packaging adhesive film, and step is as follows:
1), after ethylene-vinyl acetate copolymer 100 parts, linking agent 0.5 ~ 1 part, 0.1 ~ 2 part, oxidation inhibitor, photostabilizer 0.01 ~ 0.02 part and tackifier 0.02 ~ 0.04 part being mixed, adding temperature is carry out melting in the twin screw extruder of 200 ~ 230 DEG C, extrude, make and expect to obtain EVA glue-line raw material;
2) BOPP thin-film unreeling is carried out corona treatment, make the surface tension of BOPP film be greater than 40mN/m;
3) BOPP film two sides after treatment is all coated with aqueous polyethylene imide liquor, then dries;
4) EVA glue-line raw material prepared by step (1) being added temperature is in the single screw extrusion machine of 210 ~ 230 DEG C, extrudes the BOPP film two sides being compound to oven dry in (3) respectively respectively form an EVA glue-line by curtain coating;
5), after being cooled by sharp cooling roll by the matrix material that step (4) is made, enter traction system and carry out rolling, cut to obtain EVA precoating packaging adhesive film, described sharp cooling roll cooling temperature is 30-35 DEG C.
BOPP film and BiOriented Polypropylene Films, that first the melt of macromolecule polypropylene is made sheet material or thick film by long and narrow head, then in special drawing machine, under the speed of certain temperature and setting, simultaneously or the stretching carried out in vertical both direction (longitudinally, laterally) of substep, and through suitable cooling or thermal treatment or special processing (as corona, coating etc.) film made.
The present invention adopts pre-coat process to produce EVA packaging adhesive film, and upper and lower two surfaces being coated to BOPP thin film layer by EVA glue-line are formed.It has following beneficial effect:
1, owing to there being the support of BOPP film, thus production rate is improved greatly, and Simplified flowsheet complexity.
2, because EVA glue-line is made up of ethylene-vinyl acetate polymkeric substance and antioxidant, linking agent etc., and the content of the vinyl acetate of ethylene-vinyl acetate polymkeric substance be 28-30%, melting index is 25 ~ 35g/10min(2.16kg/230 DEG C), thus the adhesive fastness added between EVA glue-line and BOPP thin film layer, and avoid the decomposition of the aqueous polyethylene imide liquor between them, namely enhance the impact strength of glued membrane itself, environmental stress crack resistance.
3, be first all corona treatment is carried out to the two sides of BOPP film in the present invention, make its surface tension be greater than 40mN/m, thus ensure physical strength and the flexibility of product, and increase the adhesive fastness between itself and EVA glue-line.
Embodiment
Below in conjunction with specific embodiment, the present invention is specifically described.
The selection of following examples Raw:
In ethylene-vinyl acetate copolymer, the mass content of vinyl acetate is 28-30%, melting index MI is 25 ~ 35g/10min under the condition of pressure 2.16kg, temperature 230 DEG C.
In following examples, all raw materials are mass percent.
Embodiment 1:
1) by ethylene-vinyl acetate copolymer 100 parts, linking agent 2,5-dimethyl-2,5-two (t-butyl peroxy) hexane 0.5 part, oxidation inhibitor three (2,4-di-tert-butyl-phenyl) phosphorous acid ester 0.1 part, photostabilizer two (1,2,2,6,6-pentamethyl--4-piperidyl) sebate and methyl isophthalic acid, 2,2,6, after the compound 0.02 part of 6-pentamethyl--4-piperidinyl sebacate, tackifier γ-aminopropyl triethoxysilane 0.04 part mix, adding temperature is carry out melting in the twin screw extruder of 200 ~ 230 DEG C, extrude, make and expect to obtain EVA glue-line raw material;
2) BOPP thin-film unreeling is carried out corona treatment, make the surface tension of BOPP film be greater than 40mN/m;
3) BOPP film two sides after treatment is all coated with aqueous polyethylene imide liquor, then dries;
4) EVA glue-line raw material prepared by step (1) being added temperature is in the single screw extrusion machine of 210 ~ 230 DEG C, extrudes the BOPP film two sides being compound to oven dry in (3) respectively respectively form an EVA glue-line by curtain coating;
5), after being cooled by sharp cooling roll by the matrix material that step (4) is made, enter traction system and carry out rolling, cut to obtain EVA precoating packaging adhesive film, described sharp cooling roll cooling temperature is 30-35 DEG C.
Embodiment 2:
1) by ethylene-vinyl acetate copolymer 100 parts, linking agent 1, 1-(two tert-butyl peroxide) 3, 3, 5-trimethyl-cyclohexane 1 part, oxidation inhibitor tricresyl phosphite (single nonyl benzene and dinonyl benzene mixed ester) 2 parts, photostabilizer two (1, 2, 2, 6, 6-pentamethyl--4-piperidyl) sebate and methyl isophthalic acid, 2, 2, 6, the compound 0.01 part of 6-pentamethyl--4-piperidinyl sebacate, after tackifier γ-aminopropyl triethoxysilane 0.02 part mixes, adding temperature is carry out melting in the twin screw extruder of 200 ~ 230 DEG C, extrude, make and expect to obtain EVA glue-line raw material,
2) BOPP thin-film unreeling is carried out corona treatment, make the surface tension of BOPP film be greater than 40mN/m;
3) BOPP film two sides after treatment is all coated with aqueous polyethylene imide liquor, then dries;
4) EVA glue-line raw material prepared by step (1) being added temperature is in the single screw extrusion machine of 210 ~ 230 DEG C, extrudes the BOPP film two sides being compound to oven dry in (3) respectively respectively form an EVA glue-line by curtain coating;
5), after being cooled by sharp cooling roll by the matrix material that step (4) is made, enter traction system and carry out rolling, cut to obtain EVA precoating packaging adhesive film, described sharp cooling roll cooling temperature is 30-35 DEG C.
Embodiment 3:
1) by ethylene-vinyl acetate copolymer 100 parts, linking agent 1, 1-(two tert-butyl peroxide) 3, 3, 5-trimethyl-cyclohexane 0.8 part, oxidation inhibitor four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 1 part, photostabilizer two (1, 2, 2, 6, 6-pentamethyl--4-piperidyl) sebate and methyl isophthalic acid, 2, 2, 6, the compound 0.01 part of 6-pentamethyl--4-piperidinyl sebacate, after tackifier γ-aminopropyl triethoxysilane 0.03 part mixes, adding temperature is carry out melting in the twin screw extruder of 200 ~ 230 DEG C, extrude, make and expect to obtain EVA glue-line raw material,
2) BOPP thin-film unreeling is carried out corona treatment, make the surface tension of BOPP film be greater than 40mN/m;
3) BOPP film two sides after treatment is all coated with aqueous polyethylene imide liquor, then dries;
4) EVA glue-line raw material prepared by step (1) being added temperature is in the single screw extrusion machine of 210 ~ 230 DEG C, extrudes the BOPP film two sides being compound to oven dry in (3) respectively respectively form an EVA glue-line by curtain coating;
5), after being cooled by sharp cooling roll by the matrix material that step (4) is made, enter traction system and carry out rolling, cut to obtain EVA precoating packaging adhesive film, described sharp cooling roll cooling temperature is 30-35 DEG C.
Comparative example:
Preparation technology conventionally, directly adds in forcing machine by ethylene-vinyl acetate copolymer 100 parts, by extruding curtain coating legal system for glued membrane.
Glued membrane above-described embodiment 1-3 and comparative example prepared detects the correlated performances such as its tensile strength, elongation at break, cohesive strength, degree of crosslinking, percent thermal shrinkage, transmittance and water-absorbent respectively according to the detection method in following table 1, shown in table 1 specific as follows.
Table 1: performance test:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | Detection method |
| Tensile strength (MPa) | 16 | 26 | 20 | 19 | GB/T 1040 |
| Elongation at break (%) | 550 | 420 | 520 | 525 | GB/T 1040 |
| Cohesive strength (N/cm) | 45 | 54 | 55 | 38 | GB/T 2791 |
| Degree of crosslinking (%) | 85 | 80 | 75 | 86 | According to normal layer compression technology, xylene extraction method |
| Percent thermal shrinkage (TD%) | 1.9 | 1.8 | 1.8 | 2.0 | GB/T 10003-2008 |
| Transmittance (%) | 91 | 93 | 92 | 92 | GB/T 2410-2008 |
| Water-absorbent (%) | 0.07 | 0.008 | 0.07 | 0.08 | ISO 15106-1 |
Can find out from upper table 1, the mechanical property such as tensile strength, elongation at break of EVA precoating packaging adhesive film prepared by the present invention is suitable with comparative example, but its cohesive strength, degree of crosslinking, percent thermal shrinkage are all better than comparative example, thus the flexibility of the adhesive fastness added between each layer of glued membrane and glued membrane.So the EVA precoating packaging adhesive film prepared of the present invention not only production efficiency is high, and itself impact strength, environmental stress crack resistance of the glued membrane prepared.
Above embodiment is not limited only to protection scope of the present invention, all modify based on fundamental idea of the invention or change all belong to protection scope of the present invention.
Claims (8)
1. an EVA precoating packaging adhesive film, is characterized in that: this glued membrane forms by three layers, and its middle layer is BOPP thin film layer, upper and lower two-layer are all EVA glue-lines;
Described EVA glue-line is prepared from by weight by following component:
Ethylene-vinyl acetate copolymer 100 parts,
Linking agent 0.5 ~ 1 part,
0.1 ~ 2 part, oxidation inhibitor,
Photostabilizer 0.01 ~ 0.02 part,
Tackifier 0.02 ~ 0.04 part.
2. EVA precoating packaging adhesive film according to claim 1, is characterized in that: the thickness of described BOPP thin film layer is 10 ~ 20 μm, and the thickness of EVA glue-line is 300 ~ 800 μm.
3. EVA precoating packaging adhesive film according to claim 1, is characterized in that: in described ethylene-vinyl acetate copolymer, the mass content of vinyl acetate is 28-30%, melting index MI is 25 ~ 35g/10min under the condition of pressure 2.16kg, temperature 230 DEG C.
4. EVA precoating packaging adhesive film according to claim 1, is characterized in that: described linking agent is two (t-butyl peroxy) hexane of 2,5-dimethyl-2,5-or 1,1-(two tert-butyl peroxide) 3,3,5-trimethyl-cyclohexanes.
5. EVA precoating packaging adhesive film according to claim 1, it is characterized in that: described oxidation inhibitor is three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, β-(4-hydroxyl-3,5 di-tert-butyl-phenyls) the positive octadecanol ester of propionic acid, N, N '-1,6-dihexyl two (1,1-dimethyl ethyl)-4-hydroxybenzene propionyl) or tricresyl phosphite (single nonyl benzene and dinonyl benzene mixed ester).
6. EVA precoating packaging adhesive film according to claim 1, is characterized in that: described photostabilizer is two (1,2,2,6,6-pentamethyl--4-piperidyl) sebate and methyl isophthalic acid, the compound of 2,2,6,6-pentamethyl--4-piperidinyl sebacate.
7. EVA precoating packaging adhesive film according to claim 1, is characterized in that: described tackifier are γ-aminopropyl triethoxysilane (KH-550).
8. the preparation method of EVA precoating packaging adhesive film as described in any one of claim 1 ~ 7, is characterized in that: step is as follows:
1), after ethylene-vinyl acetate copolymer 100 parts, linking agent 0.5 ~ 1 part, 0.1 ~ 2 part, oxidation inhibitor, photostabilizer 0.01 ~ 0.02 part and tackifier 0.02 ~ 0.04 part being mixed, adding temperature is carry out melting in the twin screw extruder of 200 ~ 230 DEG C, extrude, make and expect to obtain EVA glue-line raw material;
2) BOPP thin-film unreeling is carried out corona treatment, make the surface tension of BOPP film be greater than 40mN/m;
3) BOPP film two sides after treatment is all coated with aqueous polyethylene imide liquor, then dries;
4) EVA glue-line raw material prepared by step (1) being added temperature is in the single screw extrusion machine of 210 ~ 230 DEG C, extrudes the BOPP film two sides being compound to oven dry in (3) respectively respectively form an EVA glue-line by curtain coating;
5), after being cooled by sharp cooling roll by the matrix material that step (4) is made, enter traction system and carry out rolling, cut to obtain EVA precoating packaging adhesive film, described sharp cooling roll cooling temperature is 30-35 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510136711.6A CN104762023A (en) | 2015-03-26 | 2015-03-26 | EVA (ethylene-vinyl acetate) precoating packaging adhesive film and preparation method thereof |
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| CN201510136711.6A CN104762023A (en) | 2015-03-26 | 2015-03-26 | EVA (ethylene-vinyl acetate) precoating packaging adhesive film and preparation method thereof |
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Cited By (7)
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| CN107523231A (en) * | 2017-08-30 | 2017-12-29 | 胡敏生 | Low Temperature Thermal mounting film and its preparation method and application |
| CN108239486A (en) * | 2016-12-26 | 2018-07-03 | 阿特斯阳光电力集团有限公司 | Anti- snail line EVA adhesive film |
| CN110699000A (en) * | 2019-10-11 | 2020-01-17 | 上海固柯胶带科技有限公司 | Film material for grinding and packaging semiconductor |
| CN112248567A (en) * | 2020-09-12 | 2021-01-22 | 杭州科能新材料科技有限公司 | Composite film for cable wrapping layer and preparation method thereof |
| CN114231196A (en) * | 2020-09-07 | 2022-03-25 | 盐城百佳年代薄膜科技有限公司 | Impact-resistant EVA (ethylene-vinyl acetate copolymer) packaging adhesive film with three-layer structure, and preparation method and application thereof |
| CN114907789A (en) * | 2022-05-30 | 2022-08-16 | 常州百佳年代薄膜科技股份有限公司 | Three-layer high-transmittance non-crosslinked photovoltaic adhesive film and preparation method thereof |
| CN116855191A (en) * | 2023-09-01 | 2023-10-10 | 苏州弘道新材料有限公司 | High-impact adhesive film and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108239486A (en) * | 2016-12-26 | 2018-07-03 | 阿特斯阳光电力集团有限公司 | Anti- snail line EVA adhesive film |
| CN107523231A (en) * | 2017-08-30 | 2017-12-29 | 胡敏生 | Low Temperature Thermal mounting film and its preparation method and application |
| CN110699000A (en) * | 2019-10-11 | 2020-01-17 | 上海固柯胶带科技有限公司 | Film material for grinding and packaging semiconductor |
| CN114231196A (en) * | 2020-09-07 | 2022-03-25 | 盐城百佳年代薄膜科技有限公司 | Impact-resistant EVA (ethylene-vinyl acetate copolymer) packaging adhesive film with three-layer structure, and preparation method and application thereof |
| CN112248567A (en) * | 2020-09-12 | 2021-01-22 | 杭州科能新材料科技有限公司 | Composite film for cable wrapping layer and preparation method thereof |
| CN112248567B (en) * | 2020-09-12 | 2022-06-21 | 杭州科能新材料科技有限公司 | Composite film for cable wrapping layer and preparation method thereof |
| CN114907789A (en) * | 2022-05-30 | 2022-08-16 | 常州百佳年代薄膜科技股份有限公司 | Three-layer high-transmittance non-crosslinked photovoltaic adhesive film and preparation method thereof |
| CN114907789B (en) * | 2022-05-30 | 2023-11-21 | 常州百佳年代薄膜科技股份有限公司 | Three-layer high-permeability non-crosslinked photovoltaic adhesive film and preparation method thereof |
| CN116855191A (en) * | 2023-09-01 | 2023-10-10 | 苏州弘道新材料有限公司 | High-impact adhesive film and preparation method thereof |
| CN116855191B (en) * | 2023-09-01 | 2023-12-29 | 苏州弘道新材料有限公司 | High-impact adhesive film and preparation method thereof |
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